v.0.34 : Jail names can be shortened

.gitignore

@@ -1,3 +1,2 @@
 gocage
 go.sum
-

CHANGELOG

@@ -0,0 +1,3 @@
+v.0.33b : Support jailing datasets on differents pools : jail_zfs_dataset now have to include the pool name  
+v.0.33c : Parallelize start/stop of jails with same priority  
+v.0.34 : jail name can be shortened 

README.md

@@ -4,8 +4,15 @@ GoCage
 Jail management tool for FreeBSD, written in Go.  
 Support iocage jails, so they can coexist.  
 Gocage is meant to be a complete jail management tool with network, snapshots, jail cloning support and a web interface. This is the hypothetic future.  
+Gocage can handle multiple datastores, so you can have jails on HDD storage and jails on SSD storage.  
 
-At present time, it list and stops jails.  
+From v0.33b, due to multi ZFS pool support, gocage is no longer 100% compatible with iocage.  
+Zfs datasets now should be specified with the ZFS pool. e.g. :  
+<code>
+Config.Jail_zfs = 1
+Config.Jail_zfs_dataset = myzfspool/poudriere
+Config.Jail_zfs_mountpoint = none
+</code>
 
 List jails
 ----------
@@ -118,3 +125,90 @@ Stop jails
 ----------
 `gocage stop test`
 
+
+Multi datastore  
+----------
+A datastore is a ZFS dataset mounted. It should be declared in gocage.conf.yml, specifying its ZFS mountpoint :
+<pre><code>
+datastore:
+  - /iocage
+  - /fastiocage
+</pre></code>
+
+In gocage commands, datastore name is the mountpoint without its "/" prefix.  
+
+### List datastores
+<pre><code>
+gocage datastore list 
++============+=============+============+===========+==========+============+
+| Name       | Mountpoint  | ZFSDataset | Available | Used     | Referenced |
++============+=============+============+===========+==========+============+
+| iocage     | /iocage     | hdd/iocage | 1.6 TB    | 414.9 GB | 27.5 KB    |
++------------+-------------+------------+-----------+----------+------------+
+| fastiocage | /fastiocage | ssd/iocage | 1.5 TB    | 65.3 KB  | 34.6 KB    |
++------------+-------------+------------+-----------+----------+------------+
+</pre></code>
+
+### Filter datastores  
+As with jails and snapshots, you can filter by name:  
+<pre><code>
+gocage datastore list iocage
++============+=============+============+===========+==========+============+
+| Name       | Mountpoint  | ZFSDataset | Available | Used     | Referenced |
++============+=============+============+===========+==========+============+
+| iocage     | /iocage     | hdd/iocage | 1.6 TB    | 414.9 GB | 27.5 KB    |
++------------+-------------+------------+-----------+----------+------------+
+</pre></code>
+
+### Sort datastores  
+You can sort datastores:  
+<pre><code>
+gocage datastore list -s -Available
++============+=============+============+===========+==========+============+
+| Name       | Mountpoint  | ZFSDataset | Available | Used     | Referenced |
++============+=============+============+===========+==========+============+
+| iocage     | /iocage     | hdd/iocage | 1.6 TB    | 415.0 GB | 27.5 KB    |
++------------+-------------+------------+-----------+----------+------------+
+| fastiocage | /fastiocage | ssd/iocage | 1.5 TB    | 65.3 KB  | 34.6 KB    |
++------------+-------------+------------+-----------+----------+------------+
+</pre></code>
+
+See [cmd/struct.go](https://git.nosd.in/yo/gocage/src/branch/master/cmd/struct.go) for field names.
+
+Migrating jails  
+----------
+With multi datastore comes the need to migrate a jail between datastores.  
+Migration can be done with a minimal downtime, using zfs differential send/receive.  
+Source jail datasets are sent to the destination datastore, jail is stopped and a last differential sync is done before starting jail on new datastore.  
+
+### Warning 
+Be aware the moment you migrate a jail to another datastore than /iocage default, you lose compatibility with iocage.  
+Then you need to disable iocage service, and enable gocage so the jails will start automatically at boot.  
+Also make sure, if you don't destroy source jail, that it won't have the "boot" property set or you will have the 2 jails up at boot.  
+
+<pre><code>
+gocage migrate -d fastiocage srv-random
+Snapshot data/iocage/jails/srv-random: Done
+Snapshot data/iocage/jails/srv-random/root: Done
+Migrate jail config dataset to fastdata/iocage/jails/srv-random: Done
+Migrate jail filesystem dataset to fastdata/iocage/jails/srv-random/root: Done
+</pre></code>
+
+
+Fetch  
+----------
+Files can be fetched from custom repository, or from local directory with "from" option.  
+For example if you destroyed releases/12.3-RELEASE and still have the downloaded files in /iocage/download/12.3-RELEASE:  
+<pre><code>
+gocage fetch -r 12.3 -o iocage --from file:/iocage/download
+</pre></code>
+
+
+TODO
+----------
+gocage update  
+gocage upgrade  
+gocage create  
+gocage destroy  
+gocage init  
+  create default pool with defaults.json

TODO.md

@@ -1,4 +1,8 @@
 Replicating jails between two servers (use zrepl)
 
-
+DEBUG: 
+- cmd/list.go:275:
+    // FIXME ??? Shouldn't be ioc-$Name ?
+    j.InternalName = rj.Name
+- WriteConfigToDisk don't write neither "release" in cmd stop neither "last_started" in cmd start
 

cmd/console.go

@@ -0,0 +1,46 @@
+package cmd
+
+import (
+	"os"
+	"fmt"
+	"log"
+	"errors"
+	"strconv"
+	"syscall"
+)
+
+func ShellJail(args []string) error {
+	// We cant shell more than one jail bc we replace gocage execution with jexec, so there wont be no return to gocage
+	if len(args) > 0 {
+		cj, err := getJailFromArray(args[0], gJails)
+		if err != nil {
+			fmt.Printf("Error getting jail %s: %v\n", args[0], err)
+			return err
+		}
+		if err := shellJail(cj); err != nil {
+			fmt.Printf("%v\n", err)
+			return err
+		}
+	}
+	
+	return nil
+}
+
+func shellJail(jail *Jail) error {
+	if false == jail.Running {
+		return errors.New("Jail is not running")
+	}
+	
+	jid := strconv.Itoa(jail.JID)
+
+	//err := syscall.Exec("/usr/sbin/jexec", []string{"jexec", jid, "/bin/csh"}, os.Environ())
+	err := syscall.Exec("/usr/sbin/jexec", []string{"jexec", jid, "login", "-f", "root"}, os.Environ())
+
+	// We should never get here, as syscall.Exec replace the gocage binary execution with jexec
+	// This means the moment syscall.Exec fires, gocage execution halt.
+	if err != nil {
+		log.Printf("Exec returned %v\n", err)
+	}
+	
+	return nil
+}

cmd/datastore.go

@@ -0,0 +1,108 @@
+package cmd
+
+import (
+	"fmt"
+	"errors"
+	"reflect"
+	"strconv"
+	"strings"
+) 
+
+func ListDatastores(args []string, display bool) error {
+	/***************************************************************
+	/   Filter datastores by names given on command line
+	/**************************************************************/
+	for _, d := range args {
+		cmd := fmt.Sprintf("zfs list -p -H -o name,used,available,referenced %s", d)
+		out, err := executeCommand(cmd)
+		if err != nil {
+			if strings.HasSuffix(err.Error(), "No such file or directory") {
+				return errors.New(fmt.Sprintf("Datastore does not exist: %s", d))
+			} else {
+				return errors.New(fmt.Sprintf("Error executing command %s: %v; command returned: %s\n", cmd, err, out))
+			}
+		}
+		
+		fields := strings.Fields(out)
+		if len(fields) < 4 {
+			return errors.New(fmt.Sprintf("Error parsing output of \"%s\": Not enough fields", cmd))
+		}
+		u, _ := strconv.ParseUint(fields[1], 10, 64)
+		a, _ := strconv.ParseUint(fields[2], 10, 64)
+		r, _ := strconv.ParseUint(fields[3], 10, 64)
+		ds := Datastore{Name: d[1:], Mountpoint: d, ZFSDataset: fields[0], Used: u, Referenced: r, Available: a}
+		
+		err = loadDefaultsForDatastore(&ds)
+		if err != nil {
+			return err
+		}
+		
+		gDatastores = append(gDatastores, ds)
+	}
+	
+	fields := strings.Split(gDisplayDColumns, ",")
+
+	if true == display {
+		/***************************************************************
+		/   Sort datastores
+		/     We support 3 sort criteria max
+		/**************************************************************/
+		if len(gSortDSFields) > 0 && gSortDSFields != "none" {		
+			ds := initDatastoreSortStruct()
+
+			// The way we manage criteria quantity is not very elegant...
+			var fct1, fct2, fct3 *reflect.Value
+			for i, c := range strings.Split(gSortDSFields, ",") {
+				var fctName string
+				if strings.HasPrefix(c, "-") {
+					fctName = fmt.Sprintf("%sDec", strings.Replace(c, "-", "", 1))
+				} else { // Par defaut (pas de prefix +/-) on considere un tri incremental
+					fctName = fmt.Sprintf("%sInc", strings.Replace(c, "+", "", 1))
+				}
+
+				// Get function by its name
+				fct, _, err := getStructFieldValue(ds, fctName)
+				
+				if err != nil {
+					fieldName := strings.Replace(strings.Replace(c, "-", "", 1), "+", "", 1)
+					return errors.New(fmt.Sprintf("ERROR getting DatastoreSort struct field %s. Please check the field name: %s\n", fctName, fieldName))
+				}
+				switch i + 1 {
+				case 1:
+					fct1 = fct
+				case 2:
+					fct2 = fct
+				case 3:
+					fct3 = fct
+				}
+			}
+
+			switch len(strings.Split(gSortDSFields, ",")) {
+			case 1:
+				DatastoresOrderedBy(fct1.Interface().(datastoreLessFunc)).Sort(gDatastores)
+			case 2:
+				DatastoresOrderedBy(fct1.Interface().(datastoreLessFunc), fct2.Interface().(datastoreLessFunc)).Sort(gDatastores)
+			case 3:
+				DatastoresOrderedBy(fct1.Interface().(datastoreLessFunc), fct2.Interface().(datastoreLessFunc), fct3.Interface().(datastoreLessFunc)).Sort(gDatastores)
+			}
+		}
+		displayDatastoresFields(gDatastores, fields)
+	}
+	
+	return nil
+}
+
+/********************************************************************************
+ * Load jails default config from $datastore/defaults.json
+ *******************************************************************************/
+func loadDefaultsForDatastore(ds *Datastore) error {
+	jc, err := getJailConfig(fmt.Sprintf("%s/defaults.json", ds.Mountpoint))
+	if err != nil {
+		return err
+	}
+
+	ds.DefaultJailConfig = jc
+	//gDefaultConfig = append(gDefaultConfig, jc)
+
+	return nil
+}

cmd/fetch.go

@@ -0,0 +1,374 @@
+package cmd
+
+import (
+	"io"
+	"os"
+	"fmt"
+	"bufio"
+	"bytes"
+	//"errors"
+	"strings"
+	"net/http"
+	//"archive/tar"
+	"encoding/hex"
+	"crypto/sha256"
+
+	//"github.com/ulikunitz/xz"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	ReleaseServer = "download.freebsd.org"
+	ReleaseRootDir = "ftp/releases"
+)
+
+var (
+	FetchFiles = []string{"base.txz", "lib32.txz", "src.txz"}
+)
+
+// TODO: Check if files already exist
+// Fetch release files, verify, put in datastore under ${datastore}/download
+// Only support http and file protocols
+func fetchRelease(release string, proto string, arch string, datastore string, fetchFrom string) error {
+	var ds Datastore
+	
+	log.SetReportCaller(true)
+	
+	if len(fetchFrom) > 0 {
+		proto = strings.Split(fetchFrom, ":")[0]
+	}
+	
+	if false == strings.EqualFold(proto, "http") &&
+		false == strings.EqualFold(proto, "file") {
+		return fmt.Errorf("Unsupported protocol: %s\n", proto)
+	}
+	
+	for _, ds = range gDatastores {
+		if strings.EqualFold(datastore, ds.Name) {
+			break
+		}
+	}
+	if false == strings.EqualFold(datastore, ds.Name) {
+		return fmt.Errorf("Datastore not found: %s\n", datastore)
+	}
+	
+	// Check datastore have a download dataset, and it is mounted
+	downloadDsName := fmt.Sprintf("%s/download", ds.ZFSDataset)
+	downloadDsMountPoint := fmt.Sprintf("%s/download", ds.Mountpoint)
+	exist, err := doZfsDatasetExist(downloadDsName)
+	if err != nil {
+		return fmt.Errorf("Error accessing dataset %s: %v\n", downloadDsName, err)
+	}
+	if false == exist {
+		// Then create dataset
+		if err := createZfsDataset(downloadDsName, downloadDsMountPoint, "lz4"); err != nil {
+			return fmt.Errorf("Error creating dataset %s: %v\n", downloadDsName, err)
+		}
+	}
+	
+	// Create download/XX.X-RELEASE dataset if necessary
+	thisDownloadDsName := fmt.Sprintf("%s/%s-RELEASE", downloadDsName, release)
+	thisDownloadDsMountPoint := fmt.Sprintf("%s/%s-RELEASE", downloadDsMountPoint, release)
+	exist, err = doZfsDatasetExist(thisDownloadDsName)
+	if err != nil {
+		return fmt.Errorf("Error accessing dataset %s: %v\n", thisDownloadDsName, err)
+	}
+	if false == exist {
+		// Then create dataset
+		if err := createZfsDataset(thisDownloadDsName, thisDownloadDsMountPoint, "lz4"); err != nil {
+			return fmt.Errorf("Error creating dataset %s: %v\n", thisDownloadDsName, err)
+		}
+	}
+
+	var fetchUrl string
+	if len(fetchFrom) > 0 {
+		fetchUrl = fmt.Sprintf("%s/%s-RELEASE", fetchFrom, release)
+	} else {
+		fetchUrl = fmt.Sprintf("%s://%s/%s/%s/%s-RELEASE", proto, ReleaseServer, ReleaseRootDir, arch, release)
+	}
+	log.Debugf("FetchURL = %s", fetchUrl)
+	
+	// check if proto/server/arch/release is available
+	if strings.EqualFold(proto, "http") {
+		resp, err := http.Get(fetchUrl)
+		if err != nil {
+			return fmt.Errorf("Can not get %s: %v\n", fetchUrl, err)
+		}
+		defer resp.Body.Close()
+		if resp.StatusCode != 200 {
+			return fmt.Errorf("Get %s returned %d, check release name\n", fetchUrl, resp.StatusCode)
+		}
+	}
+
+	// Fetch files
+	// Get MANIFEST so we get sha256 sums
+	if err := fetchFile(proto, fetchUrl, "MANIFEST", thisDownloadDsMountPoint, []byte{}); err != nil {
+		return fmt.Errorf("%v\n", err)
+	}
+	// Build an array of "file;checksum"
+	checksumMap, err := buildFileChecksumFromManifest(fmt.Sprintf("%s/MANIFEST", thisDownloadDsMountPoint), FetchFiles)
+	if err != nil {
+		return fmt.Errorf("%v\n", err)
+	}
+
+	// Fetch remaining files, verify integrity and write to disk
+	for f, c := range checksumMap {
+		if err := fetchFile(proto, fetchUrl, f, thisDownloadDsMountPoint, c); err != nil {
+			return fmt.Errorf("%v\n", err)
+		}
+	}
+	
+	return nil
+}
+
+// Extract release files stored in iocage/download/$RELEASE/ to iocage/releases/$RELEASE/root/
+func extractRelease(release string, datastore string) {
+	log.SetReportCaller(true)
+	
+	var ds Datastore
+	
+	for _, ds = range gDatastores {
+		if strings.EqualFold(datastore, ds.Name) {
+			break
+		}
+	}
+	if false == strings.EqualFold(datastore, ds.Name) {
+		fmt.Printf("Datastore not found: %s\n", datastore)
+		return
+	}
+	
+	// Check datastore have a releases dataset, and it is mounted
+	releaseDsName := fmt.Sprintf("%s/releases", ds.ZFSDataset)
+	releaseDsMountPoint := fmt.Sprintf("%s/releases", ds.Mountpoint)
+	exist, err := doZfsDatasetExist(releaseDsName)
+	if err != nil {
+		fmt.Printf("Error accessing dataset %s: %v\n", releaseDsName, err)
+		return
+	}
+	if false == exist {
+		// Then create dataset
+		if err := createZfsDataset(releaseDsName, releaseDsMountPoint, "lz4"); err != nil {
+			fmt.Printf("Error creating dataset %s: %v\n", releaseDsName, err)
+			return
+		}
+	}
+	
+	// Create releases/XX.X-RELEASE dataset if necessary
+	thisReleaseDsName := fmt.Sprintf("%s/%s-RELEASE", releaseDsName, release)
+	thisReleaseDsMountPoint := fmt.Sprintf("%s/%s-RELEASE", releaseDsMountPoint, release)
+	exist, err = doZfsDatasetExist(thisReleaseDsName)
+	if err != nil {
+		fmt.Printf("Error accessing dataset %s: %v\n", thisReleaseDsName, err)
+		return
+	}
+	if false == exist {
+		// Then create dataset
+		if err := createZfsDataset(thisReleaseDsName, thisReleaseDsMountPoint, "lz4"); err != nil {
+			fmt.Printf("Error creating dataset %s: %v\n", thisReleaseDsName, err)
+			return
+		}
+	}
+	
+	// Create releases/XX.X-RELEASE/root dataset if necessary
+	thisReleaseRootDsName := fmt.Sprintf("%s/root", thisReleaseDsName)
+	thisReleaseRootDsMountPoint := fmt.Sprintf("%s/root", thisReleaseDsMountPoint)
+	exist, err = doZfsDatasetExist(thisReleaseRootDsName)
+	if err != nil {
+		fmt.Printf("Error accessing dataset %s: %v\n", thisReleaseRootDsName, err)
+		return
+	}
+	if false == exist {
+		// Then create dataset
+		if err := createZfsDataset(thisReleaseRootDsName, thisReleaseRootDsMountPoint, "lz4"); err != nil {
+			fmt.Printf("Error creating dataset %s: %v\n", thisReleaseRootDsName, err)
+			return
+		}
+	}
+	
+	// Now extract download/$RELEASE/*.txz to releases/XX.X-RELEASE/root
+	downloadDsMountPoint := fmt.Sprintf("%s/download", ds.Mountpoint)
+	downloadDir := fmt.Sprintf("%s/%s-RELEASE", downloadDsMountPoint, release)
+	
+	d, err := os.Open(downloadDir)
+	defer d.Close()
+	if err != nil {
+		fmt.Printf("Can not read %s directory: %v\n", downloadDir, err)
+		return
+	}
+	files, err := d.Readdir(0)
+	if err != nil {
+		fmt.Printf("Can not browse %s directory: %v\n", downloadDir, err)
+		return
+	}
+	
+	// Extract every .txz files
+	for _, fi := range files {
+		if false == fi.IsDir() {
+			if strings.HasSuffix(fi.Name(), ".txz") {
+				ar := fmt.Sprintf("%s/%s", downloadDir, fi.Name())
+				fmt.Printf("Extracting file %s... ", ar)
+				// pure Go method, sorry this is so slow. Also I did not handle permissions in this
+/*				f, err := os.Open(ar)
+				defer f.Close()
+				if err != nil {
+					fmt.Printf("Can not open %s: %v\n", ar, err)
+					return
+				}
+				// xz reader
+				r, err := xz.NewReader(f)
+				if err != nil {
+					fmt.Printf("Can not read %s: %v\n", ar, err)
+					return
+				}
+				// tar reader
+				tr := tar.NewReader(r)
+				// Iterate through the files in the archive.
+				for {
+					hdr, err := tr.Next()
+					if err == io.EOF {
+						// end of tar archive
+						break
+					}
+					if err != nil {
+						log.Fatal(err)
+					}
+					switch hdr.Typeflag {
+						case tar.TypeDir:
+							// create a directory
+							dest := fmt.Sprintf("%s/%s", thisReleaseRootDsMountPoint, hdr.Name)
+							// FIXME: Access rights?
+							err = os.MkdirAll(dest, 0777)
+							if err != nil {
+								log.Fatal(err)
+							}
+						case tar.TypeReg, tar.TypeRegA:
+							// write a file
+							dest := fmt.Sprintf("%s/%s", thisReleaseRootDsMountPoint, hdr.Name)
+							w, err := os.Create(dest)
+							defer w.Close()
+							if err != nil {
+								log.Fatal(err)
+							}
+							_, err = io.Copy(w, tr)
+							if err != nil {
+								log.Fatal(err)
+							}
+					}
+				}
+*/
+				cmd := fmt.Sprintf("/usr/bin/tar xpf %s -C %s", ar, thisReleaseRootDsMountPoint)
+				out, err := executeCommand(cmd)
+				if err != nil && len(out) > 0 {
+					fmt.Printf("Error: %v: %s\n", err, out)
+				} else {
+					fmt.Printf("Done\n")
+				}
+			}
+		}
+	}
+}
+
+func fetchFile(proto, baseUrl, fileName, storeDir string, checksum []byte) error {
+	// Check storeDir exist
+	_, err := os.Stat(storeDir)
+	if os.IsNotExist(err) {
+		return fmt.Errorf("Directory does not exist: %s\n", storeDir)
+	}
+
+	url := fmt.Sprintf("%s/%s", baseUrl, fileName)
+	fmt.Printf("Fetching %s...", url)
+	
+	var body []byte
+	if strings.EqualFold(proto, "http") {
+		resp, err := http.Get(url)
+		if err != nil {
+			fmt.Printf(" Error\n")
+			return fmt.Errorf("Can not get %s: %v\n", url, err)
+		}
+		defer resp.Body.Close()
+		body, err = io.ReadAll(resp.Body)
+		if err != nil {
+			return fmt.Errorf("Can not read %s response body: %v\n", url, err)
+		}
+	} else if strings.EqualFold(proto, "file") {
+		url = strings.Replace(url, "file:", "", 1)
+		f, err := os.Open(url)
+		if err != nil {
+			return fmt.Errorf("Error accessing file %s", url)
+		}
+		defer f.Close()
+		body, err = io.ReadAll(f)
+		if err != nil {
+			return fmt.Errorf("Can not read file %s: %v\n", url, err)
+		}
+	}
+	
+	// Check integrity
+	if len(checksum) > 0 {
+		err = checkIntegrity(body, checksum)
+		if err != nil {
+			return fmt.Errorf("Error checking integrity")
+		}
+	}
+	
+	dest := fmt.Sprintf("%s/%s", storeDir, fileName)
+
+	f, err := os.Create(dest)       // creates a file at current directory
+	if err != nil {
+		return fmt.Errorf("Can not create file %s: %v\n", dest, err)
+	}
+	defer f.Close()
+	f.Write(body)
+	fmt.Printf(" Done\n")
+	return nil
+}
+
+
+func checkIntegrity(data []byte, checksum []byte) error {
+	sum := sha256.Sum256(data)
+	
+	if false == bytes.Equal(checksum[:],sum[:]) {
+		return fmt.Errorf("Invalid checksum: %x != %x", sum, checksum)
+	}
+	return nil
+}
+
+// Get checksum from manifest, for each file in fileList
+/* MANIFEST format:
+ * base-dbg.txz    a5b51f3d54686509e91ca9c30e9f1cd93dc757f25c643609b3c35e7119c0531d        1654    base_dbg        "Base system (Debugging)"       off
+ * base.txz        e85b256930a2fbc04b80334106afecba0f11e52e32ffa197a88d7319cf059840        26492   base    "Base system (MANDATORY)"       on
+ * kernel-dbg.txz  6b47a6cb83637af1f489aa8cdb802d9db936ea864887188cfc69d8075762214e        912     kernel_dbg      "Kernel (Debugging)"    on
+ */
+func buildFileChecksumFromManifest(manifest string, fileList []string) (map[string][]byte, error) {
+	var ckarr = make(map[string][]byte)
+
+	rm, err := os.Open(manifest)
+	if err != nil {
+		return ckarr, fmt.Errorf("Unable to open MANIFEST: %v", err)
+	}
+	fscan := bufio.NewScanner(rm)
+	fscan.Split(bufio.ScanLines)
+	
+	// For each MANIFEST line...
+	for fscan.Scan() {
+		fields := strings.Fields(fscan.Text())
+		fn := fields[0]
+		fck := fields[1]
+		hexSum, err := hex.DecodeString(fck)
+		if err != nil {
+			return ckarr, fmt.Errorf("Invalid value for checksum %s", fck)
+		}
+		// ... Find the corresponding file in fileList, then add to checksum array ckarr
+		for _, f := range fileList {
+			if strings.EqualFold(f, fn) {
+				ckarr[fn] = hexSum
+				break
+			}
+		}
+	}
+	
+	if len(ckarr) < len(fileList) {
+		return ckarr, fmt.Errorf("Missing file in MANIFEST")
+	}
+	return ckarr, nil
+}

cmd/jailhost.go

@@ -0,0 +1,241 @@
+package cmd
+
+import (
+	"fmt"
+	"net"
+	"regexp"
+	"strconv"
+	"strings"
+	"io/ioutil"
+	"golang.org/x/net/route"
+)
+
+var defaultRoute4 = [4]byte{0, 0, 0, 0}
+var defaultRoute6 = [16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+var local6 = [16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}
+
+func Inet4AddrToString(ip4 route.Inet4Addr) string {
+	return fmt.Sprintf("%v.%v.%v.%v", ip4.IP[0], ip4.IP[1], ip4.IP[2], ip4.IP[3])
+}
+
+func Inet6AddrToString(ip6 route.Inet6Addr) string {
+	return fmt.Sprintf("%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x",
+		ip6.IP[0], ip6.IP[1], ip6.IP[2], ip6.IP[3], ip6.IP[4], ip6.IP[5], ip6.IP[6], ip6.IP[7],
+		ip6.IP[8], ip6.IP[9], ip6.IP[10], ip6.IP[11], ip6.IP[12], ip6.IP[13], ip6.IP[14], ip6.IP[15])
+}
+
+/*****************************************************************************
+* Initialize default_interface, default_gatway4, default_gateway6
+*****************************************************************************/
+func (jh *JailHost) InitNetworkProperties() {
+	rib, _ := route.FetchRIB(0, route.RIBTypeRoute, 0)
+	messages, err := route.ParseRIB(route.RIBTypeRoute, rib)
+	if err != nil {
+		panic(err)
+	}
+
+	for _, message := range messages {
+		route_message := message.(*route.RouteMessage)
+		addresses := route_message.Addrs
+		card_index := route_message.Index
+
+		if addresses[0].Family() == 2 {
+			var destination4, gateway4 *route.Inet4Addr
+			ok := false
+
+			if destination4, ok = addresses[0].(*route.Inet4Addr); !ok {
+				continue
+			}
+
+			if gateway4, ok = addresses[1].(*route.Inet4Addr); !ok {
+				continue
+			}
+
+			if destination4 == nil || gateway4 == nil {
+				continue
+			}
+
+			if destination4.IP == defaultRoute4 {
+				card, _ := net.InterfaceByIndex(card_index)
+				//fmt.Printf("Default IPv4 gateway is %v on card %s\n", Inet4AddrToString(*gateway4), card.Name)
+				jh.default_interface = card.Name
+				jh.default_gateway4 = Inet4AddrToString(*gateway4)
+			}
+		} else if addresses[0].Family() == 28 {
+			var destination6, gateway6 *route.Inet6Addr
+			ok := false
+
+			if destination6, ok = addresses[0].(*route.Inet6Addr); !ok {
+				continue
+			}
+
+			if gateway6, ok = addresses[1].(*route.Inet6Addr); !ok {
+				continue
+			}
+
+			if destination6 == nil || gateway6 == nil {
+				continue
+			}
+
+			if destination6.IP == defaultRoute6 && gateway6.IP != local6 {
+				card, _ := net.InterfaceByIndex(card_index)
+				//fmt.Printf("Default IPv6 gateway is %v on card %s\n", Inet6AddrToString(*gateway6), card.Name)
+				jh.default_interface = card.Name
+				jh.default_gateway6 = Inet6AddrToString(*gateway6)
+			}
+		}
+	}
+}
+
+func (jh *JailHost) GetDefaultInterface() string {
+	if len(jh.default_interface) == 0 {
+		jh.InitNetworkProperties()
+	}
+	return jh.default_interface
+}
+
+func (jh *JailHost) GetDefaultGateway4() string {
+	if len(jh.default_gateway4) == 0 {
+		jh.InitNetworkProperties()
+	}
+	return jh.default_gateway4
+}
+
+func (jh *JailHost) GetDefaultGateway6() string {
+	if len(jh.default_gateway6) == 0 {
+		jh.InitNetworkProperties()
+	}
+	return jh.default_gateway6
+}
+
+/*****************************************************************************
+ * Get all network interfaces
+ ****************************************************************************/
+func (jh *JailHost) GetInterfaces() ([]string, error) {
+	var names []string
+	
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return names, fmt.Errorf("Error listing network interfaces: %v", err)
+	}
+	for _, n := range interfaces {
+		names = append(names, n.Name)
+	}
+	
+	return names, nil
+}
+
+func (jh *JailHost) GetBridgeMTU(bridgeName string) (int, error) {
+	bridge, err := net.InterfaceByName(bridgeName)
+	if err != nil {
+		return 0, err
+	}
+	
+	return bridge.MTU, nil
+}
+
+/*****************************************************************************
+ * Get all IPv4 currently in use on host
+ ****************************************************************************/
+func getHostInUseIPv4() ([]string, error) {
+	var ips []string
+
+	re := regexp.MustCompile(ifconfigipv4re)
+
+	out, err := executeCommand("/sbin/ifconfig")
+	if err != nil {
+		return ips, fmt.Errorf("Error executing \"/sbin/ifconfig\": %s", err)
+	}
+
+	for _, line := range strings.Split(out, "\n") {
+		if re.MatchString(line) {
+			ips = append(ips, re.FindStringSubmatch(line)[1])
+		}
+	}
+
+	return ips, nil
+}
+
+func getHostname() (string, error) {
+	out, err := executeCommand("/bin/hostname")
+	if err != nil {
+		return "", fmt.Errorf("Error executing \"/bin/hostname\": %v", err)
+	}
+	
+	return strings.Split(out, "\n")[0], nil
+}
+
+func getHostId() (string, error) {
+	var content []byte
+	var err     error
+	// return empty string if file does not exist
+	if content, err = ioutil.ReadFile("/etc/hostid"); err != nil {
+		if strings.HasSuffix(err.Error(), "no such file or directory") {
+			return "", nil
+		}
+		return "", err
+	}
+	
+	return strings.Split(string(content), "\n")[0], nil
+}
+
+func getArch() (string, error) {
+	out, err := executeCommand("/usr/bin/uname -p")
+	if err != nil {
+		return "", fmt.Errorf("Error executing \"/usr/bin/uname -p\": %v", err)
+	}
+	
+	return strings.Split(out, "\n")[0], nil
+}
+
+func getFreeBSDVersion() (FreeBSDVersion, error) {
+	var version FreeBSDVersion
+	regex := `([0-9]{1,2})(\.)?([0-9]{1,2})?\-([^\-]*)(\-)?(p[0-9]{1,2})?`
+	
+	re := regexp.MustCompile(regex)
+	
+	out, err := executeCommand("/bin/freebsd-version")
+	if err != nil {
+		return version, fmt.Errorf("Error executing \"/bin/freebsd-version\": %v", err)
+	}
+	
+	if re.MatchString(out) {
+		version.major, err = strconv.Atoi(re.FindStringSubmatch(out)[1])
+		if err != nil {
+			return version, err
+		}
+		version.minor, err = strconv.Atoi(re.FindStringSubmatch(out)[3])
+		if err != nil {
+			return version, err
+		}
+		version.flavor = strings.Trim(re.FindStringSubmatch(out)[4], "\n")
+		
+		// Skip the 'p' starting patch level
+		if len(re.FindStringSubmatch(out)[6]) > 0 {
+			version.patchLevel, err = strconv.Atoi(re.FindStringSubmatch(out)[6][1:])
+			if err != nil {
+				return version, err
+			}
+		}
+	}
+	return version, nil
+}
+
+func NewJailHost() (JailHost, error) {
+	var jh  JailHost
+	var err error
+	
+	if jh.hostname, err = getHostname(); err != nil {
+		return jh, err
+	}
+	if jh.arch, err = getArch(); err != nil {
+		return jh, err
+	}
+	if jh.hostid, err = getHostId(); err != nil {
+		return jh, err
+	}
+	if jh.version, err = getFreeBSDVersion(); err != nil {
+		return jh, err
+	}
+	return jh, nil
+}

cmd/list.go

@@ -1,24 +1,29 @@
 package cmd
 
 import (
-	"os"
+	"encoding/json"
 	"fmt"
+	"gocage/jail"
+	"io/ioutil"
 	"log"
+	"os"
 	"reflect"
 	"strings"
-	"io/ioutil"
-	"gocage/jail"
-	"encoding/json"
-	"github.com/spf13/viper"
 )
 
 /********************************************************************************
  * List all properties a jail have, with their internal name
+ * Only print properties name. To get name & values, use GetJailProperties()
  *******************************************************************************/
 func ListJailsProps(args []string) {
 	var conf Jail
-	var jailconf JailConfig
 	var result []string
+	// Mandatory constructor to init default values
+	jailconf, err := NewJailConfig()
+	if err != nil {
+		fmt.Printf("Error allocating JailConfig: %s\n", err.Error())
+		return
+	}
 
 	conf.Config = jailconf
 
@@ -34,11 +39,76 @@ func ListJailsProps(args []string) {
  *   into gJails global var
  *******************************************************************************/
 func ListJails(args []string, display bool) {
-	fields := strings.Split(gDisplayColumns, ",")
-
-	for _, d := range viper.GetStringSlice("datastore") {
-		listJailsFromDatastore(d)
+	type uniqueJailName struct {
+		jail       string
+		unique     bool
+		uniqueName bool
 	}
+	var nameChecked []*uniqueJailName
+	var curCheck *uniqueJailName
+	var found bool
+	var skip bool
+	
+	for _, ds := range gDatastores {
+		listJailsFromDatastore(ds, args, display)
+	}
+	
+	// Only when displaying jails, we accept to process multiple same name jails
+	if false == display {
+		for _, j := range gJails {
+			// If already checked and was using distinctive name, skip this occurence
+			for i, n := range nameChecked {
+				if strings.EqualFold(n.jail, j.Name) {
+					found = true
+					if false == n.unique && true == n.uniqueName {
+						skip = true
+					} else {
+						curCheck = nameChecked[i]
+					}
+					break
+				}
+			}
+			
+			if true == skip {
+				continue
+			}
+			
+			// Initialize if not found in nameChecked
+			if false == found {
+				curCheck = &uniqueJailName{jail: j.Name,
+									unique: true,
+									uniqueName: false}
+			} else {
+				found = false
+			}
+			
+			if countOfJailsWithThisName(j.Name) > 1 {
+				//fmt.Printf("DEBUG: Jail %s exist multiple times, now checking if specified with full name\n", j.Name)
+				curCheck.unique = false
+				
+				for _, a := range args {
+					//fmt.Printf("DEBUG: comparing %s/%s with %s\n", j.Datastore, j.Name, a)
+					if strings.EqualFold(a, fmt.Sprintf("%s/%s", j.Datastore, j.Name)) {
+						//fmt.Printf("DEBUG: Was specified with full name, GG!\n")
+						curCheck.uniqueName = true
+					}
+				}
+			}
+			nameChecked = append(nameChecked, curCheck)
+		}
+		
+		// Now check
+		for _, a := range args {
+			for _, n := range nameChecked {
+				if strings.EqualFold(n.jail, a) && false == n.unique && false == n.uniqueName {
+					fmt.Printf("There is more than one jail named \"%s\", please use datastore/jail format\n", n.jail)
+					os.Exit(1)
+				}
+			}
+		}
+	}
+	
+	fields := strings.Split(gDisplayJColumns, ",")
 	
 	// This is the structure we will filter, then display
 	var jails []Jail
@@ -76,7 +146,6 @@ func ListJails(args []string, display bool) {
 		jails = gJails
 	}
 
-
 	/***************************************************************
 	/   Filter jails by names given on command line
 	/**************************************************************/
@@ -86,7 +155,6 @@ func ListJails(args []string, display bool) {
 			for _, j := range jails {
 				if j.Name == a {
 					js = append(js, j)
-					break
 				}
 			}
 		}
@@ -97,16 +165,16 @@ func ListJails(args []string, display bool) {
 	/   Sort jails
 	/     We support 3 sort criteria max
 	/**************************************************************/
-	if len(gSortFields) > 0 && gSortFields != "none" {
-		js := initSortStruct()
+	if len(gSortJailFields) > 0 && gSortJailFields != "none" {
+		js := initJailSortStruct()
 
 		// The way we manage criteria quantity is not very elegant...
 		var fct1, fct2, fct3 *reflect.Value
-		for i, c := range strings.Split(gSortFields, ",") {
+		for i, c := range strings.Split(gSortJailFields, ",") {
 			var fctName string
 			if strings.HasPrefix(c, "-") {
 				fctName = fmt.Sprintf("%sDec", strings.Replace(c, "-", "", 1))
-			} else {	// Par defaut (pas de prefix +/-) on considere un tri incremental	
+			} else { // Par defaut (pas de prefix +/-) on considere un tri incremental
 				fctName = fmt.Sprintf("%sInc", strings.Replace(c, "+", "", 1))
 			}
 
@@ -117,20 +185,23 @@ func ListJails(args []string, display bool) {
 				fmt.Printf("ERROR getting JailSort struct field %s. Please check the field name: %s\n", fctName, fieldName)
 				return
 			}
-			switch i+1 {
-				case 1:	fct1 = fct
-				case 2: fct2 = fct
-				case 3: fct3 = fct
+			switch i + 1 {
+			case 1:
+				fct1 = fct
+			case 2:
+				fct2 = fct
+			case 3:
+				fct3 = fct
 			}
 		}
 
-		switch len(strings.Split(gSortFields, ",")) {
-			case 1:
-				OrderedBy(fct1.Interface().(lessFunc)).Sort(jails)
-			case 2:
-				OrderedBy(fct1.Interface().(lessFunc), fct2.Interface().(lessFunc)).Sort(jails)
-			case 3:
-				OrderedBy(fct1.Interface().(lessFunc), fct2.Interface().(lessFunc), fct3.Interface().(lessFunc)).Sort(jails)
+		switch len(strings.Split(gSortJailFields, ",")) {
+		case 1:
+			JailsOrderedBy(fct1.Interface().(jailLessFunc)).Sort(jails)
+		case 2:
+			JailsOrderedBy(fct1.Interface().(jailLessFunc), fct2.Interface().(jailLessFunc)).Sort(jails)
+		case 3:
+			JailsOrderedBy(fct1.Interface().(jailLessFunc), fct2.Interface().(jailLessFunc), fct3.Interface().(jailLessFunc)).Sort(jails)
 		}
 	}
 
@@ -138,61 +209,78 @@ func ListJails(args []string, display bool) {
 	/   Finally, display jails
 	/**************************************************************/
 	if display {
-		displayStructFields(jails, fields)
+		displayJailsFields(jails, fields)
 	}
 }
 
+func listJailsFromDatastore(ds Datastore, args []string, accept_multiple bool) {
 	
-func listJailsFromDatastore(datastore string) {
-	fileInfo, err := os.Stat(datastore)
-	if err != nil { log.Fatalln(fmt.Sprintf("Unable to access %s, check path and/or rights", datastore)) }
-	if fileInfo.IsDir() == false { log.Fatalln(fmt.Sprintf("%s is not a directory", datastore)) }
+	fileInfo, err := os.Stat(ds.Mountpoint)
+	if err != nil {
+		log.Fatalln(fmt.Sprintf("Unable to access %s, check path and/or rights", ds.Mountpoint))
+	}
+	if fileInfo.IsDir() == false {
+		log.Fatalln(fmt.Sprintf("%s is not a directory", ds.Mountpoint))
+	}
 
 	// A datastore have to contain a "jails" directory
-	jailsDir := fmt.Sprintf("%s/jails", datastore)
+	jailsDir := fmt.Sprintf("%s/jails", ds.Mountpoint)
 	fileInfo, err = os.Stat(jailsDir)
-	if err != nil { log.Fatalln(fmt.Sprintf("Unable to access %s, check path and/or rights", jailsDir)) }
-	if fileInfo.IsDir() == false { log.Fatalln(fmt.Sprintf("%s is not a directory", jailsDir)) }
+	if err != nil {
+		log.Fatalln(fmt.Sprintf("Unable to access %s, check path and/or rights", jailsDir))
+	}
+	if fileInfo.IsDir() == false {
+		log.Fatalln(fmt.Sprintf("%s is not a directory", jailsDir))
+	}
 
-	listJailsFromDirectory(jailsDir)
+	listJailsFromDirectory(jailsDir, ds.Name)
 }
 
-
-func listJailsFromDirectory(dir string) ([]Jail) {
+func listJailsFromDirectory(dir string, dsname string) ([]Jail, error) {
 	files, err := ioutil.ReadDir(dir)
-	if err != nil { log.Fatalln(fmt.Sprintf("Unable to browse %s, check path and/or rights", dir)) }
+	if err != nil {
+		log.Fatalln(fmt.Sprintf("Unable to browse %s, check path and/or rights", dir))
+	}
 
 	for _, fi := range files {
 		if fi.IsDir() == true {
 
-		// 1. Get conf from config.json
+			// 1. Get conf from config.json
 			jailConfPath := fmt.Sprintf("%s/%s/%s", dir, fi.Name(), "config.json")
 			jailConf, err := getJailConfig(jailConfPath)
-			if err != nil { log.Println("ERROR reading jail config for %s", jailConfPath) }
-	
-		// 2. Build jail object from config
-			jailRootPath := fmt.Sprintf("%s/%s/%s", dir, fi.Name(), "root")
-			j := Jail{
-				Name: jailConf.Host_hostname,
-				Config: jailConf,
-				ConfigPath: jailConfPath,
-				RootPath: jailRootPath,
-				Running: false,
+			if err != nil {
+				log.Println("ERROR reading jail config for %s", jailConfPath)
 			}
 
-		// 3. Add current running informations
+			// 2. Build jail object from config
+			jailRootPath := fmt.Sprintf("%s/%s/%s", dir, fi.Name(), "root")
+			j := Jail{
+				Name:       jailConf.Host_hostuuid,
+				Config:     jailConf,
+				ConfigPath: jailConfPath,
+				Datastore:  dsname,
+				RootPath:   jailRootPath,
+				Running:    false,
+			}
+
+			// 3. Add current running informations
 			rjails, err := jail.GetJails()
-			if err != nil { log.Fatalln("Unable to list running jails") }
+			if err != nil {
+				log.Fatalln("Unable to list running jails")
+			}
 			for _, rj := range rjails {
 				if rj.Path == j.RootPath {
 					j.JID = rj.Jid
 					j.Running = true
+					// FIXME ??? Shouldn't be ioc-$Name ?
 					j.InternalName = rj.Name
+					j.Devfs_ruleset = rj.Devfs_ruleset
 					break
 				}
 			}
 
-/* This op take some 600ms for ~40 jails :^( */
+			// 4. Get Zpool
+			/* This op take some 600ms for ~40 jails :^( */
 			out, err := executeCommand(fmt.Sprintf("zfs list -H -o name %s", j.RootPath))
 			if err != nil {
 				fmt.Printf("ERROR getting dataset from %s: %s\n", j.RootPath, err.Error())
@@ -200,21 +288,40 @@ func listJailsFromDirectory(dir string) ([]Jail) {
 				j.Zpool = strings.Split(strings.TrimSuffix(out, "\n"), "/")[0]
 			}
 
+			// Check if jail with the same name already exist on another DS
+			for _, jj := range gJails {
+				if strings.EqualFold(jj.Name, j.Name) {
+					/*fmt.Printf("Warning: A jail with name %s exist on datastore %s, use full name to interact!\n", j.Name, jj.Datastore)
+					fmt.Printf("(Ex: gocage start %s/%s)\n", jj.Datastore, j.Name)*/
+					// Add Datastore  to avoid confusion
+					if false == strings.Contains(gDisplayJColumns, "Datastore") {
+						gDisplayJColumns += ",Datastore"
+					}
+				}
+			}
+			
 			gJails = append(gJails, j)
 		}
 	}
 
-	return gJails
+	return gJails, nil
 }
 
-
 func getJailConfig(jailConfigPath string) (JailConfig, error) {
 	content, err := ioutil.ReadFile(jailConfigPath)
-	if err != nil { log.Fatalln(fmt.Sprintf("Unable to read %s, check path and/or rights", jailConfigPath)) }
+	if err != nil {
+		log.Fatalln(fmt.Sprintf("Unable to read %s, check path and/or rights", jailConfigPath))
+	}
 
-	var jc JailConfig
+	// Mandatory constructor to init default values
+	jc, err := NewJailConfig()
+	if err != nil {
+		return jc, err
+	}
 	err = json.Unmarshal([]byte(content), &jc)
-	if err != nil { log.Fatalln(fmt.Sprintf("Error occured during unmarshaling %s: %s", jailConfigPath, err.Error())) }
+	if err != nil {
+		log.Fatalln(fmt.Sprintf("Error occured during unmarshaling %s: %s", jailConfigPath, err.Error()))
+	}
 
 	return jc, err
 }

cmd/migrate.go

@@ -0,0 +1,224 @@
+package cmd
+
+import (
+	"os"
+	"fmt"
+	"bufio"
+	"errors"
+	"strings"
+)
+
+const (
+	// 1MB
+	BUFFER_SIZE = 512
+)
+
+/********************************************************************************
+ * Migrate jail to another zfs pool
+ *******************************************************************************/
+func MigrateJail(args []string) {
+	var jailNames []string
+
+	if len(args) > 0 {
+		for _, a := range args {
+			jailNames = append(jailNames, a)
+		}
+	}
+
+	for _, jn := range jailNames {
+		cj, err := getJailFromArray(jn, gJails)
+		if cj == nil {
+			fmt.Printf("Error getting jail %s: Not found\n", jn)
+			return
+		}
+		
+		// Check if destination datastore exist & get current DS
+		destDS, err := getDatastoreFromArray(gMigrateDestDatastore, gDatastores)
+		if err != nil {
+			fmt.Printf("Error getting datastore \"%s\": %v\n", gMigrateDestDatastore, err)
+			return
+		}
+		curDS, err := getDatastoreFromArray(cj.Datastore, gDatastores)
+		if err != nil {
+			fmt.Printf("Error getting datastore \"%s\": %v\n", gMigrateDestDatastore, err)
+			return
+		}
+		
+		if cj.Running == true && gYesToAll == false {
+			fmt.Printf("WARNING: Jail %s is running\n", cj.Name)
+			fmt.Printf("Migration will stop it for data sync before starting on the new pool. You will be prompted for shutdown.\n")
+			fmt.Printf("Continue? (y/n) ")
+			scanr := bufio.NewScanner(os.Stdin)
+			scanr.Scan()
+			if false == strings.EqualFold(scanr.Text(), "y") {
+				fmt.Printf("Migration aborted\n")
+				return
+			}
+		}
+
+		/* TODO : Check dest pool (gMigrateDestDatastore) existence
+				zfs snapshot /iocage/jails/$jail@gocage_mig_first_snap
+				zfs snapshot /iocage/jails/$jail/root@gocage_mig_first_snap
+				zfs send jail@gocage_mig_first_snap | zfs receive destpool/jails/jail_name
+				zfs send jail/root@gocage_mig_first_snap | zfs receive destpool/jails/jail_name/root
+				shutdown jail if needed
+				if jail was shutdown
+					zfs snapshot /iocage/jails/$jail@gocage_mig_last_snap to get last data
+					zfs send -i jail@gocage_mig_first_snap jail/root@gocage_mig_last_snap | zfs receive -F destpool/jails/jail_name
+					start jail on new dest
+					zfs destroy destpool/jails/jail_name@gocage_mig_first_snap
+					zfs destroy destpool/jails/jail_name/root@gocage_mig_first_snap
+		*/
+
+		// Snapshot config
+		dsconf := strings.Join([]string{curDS.ZFSDataset, "jails", jn}, "/")
+		fmt.Printf("Snapshot %s: ", dsconf)
+		if err = zfsSnapshot(dsconf, "gocage_mig_init"); err != nil {
+			fmt.Printf("Error: %v\n", err)
+			return
+		}
+		fmt.Printf("Done\n")
+		
+		// Snapshot filesystem
+		dsdata := strings.Join([]string{curDS.ZFSDataset, "jails", jn, "root"}, "/")
+		fmt.Printf("Snapshot %s: ", dsdata)
+		if err := zfsSnapshot(dsdata, "gocage_mig_init"); err != nil {
+			fmt.Printf("Error: %v\n", err)
+			return
+		}
+		fmt.Printf("Done\n")
+		
+		
+		// TODO: Browse jailed ZFS dataset to migrate them (see poudriere for example)
+		// zfs send -R src/poudriere@init | zfs receive -Fu dest/poudriere
+		
+		dsconfdest := strings.Join([]string{destDS.ZFSDataset, "jails", jn}, "/")
+		fmt.Printf("Migrate jail config dataset to %s: ", dsconfdest)
+		if err := zfsCopy(fmt.Sprintf("%s@gocage_mig_init", dsconf), dsconfdest); err != nil {
+			fmt.Printf("Error: %v\n", err)
+		}
+		fmt.Printf("Done\n")
+		
+		dsdatadest := strings.Join([]string{destDS.ZFSDataset, "jails", jn, "root"}, "/")
+		fmt.Printf("Migrate jail filesystem dataset to %s: ", dsdatadest)
+		if err := zfsCopy(fmt.Sprintf("%s@gocage_mig_init", dsdata), dsdatadest); err != nil {
+			fmt.Printf("Error: %v\n", err)
+		}
+		fmt.Printf("Done\n")
+		
+		// Running jail needs a last snapshot for an incremental send/recv after shutting down.
+		if cj.Running == true {
+			fmt.Printf("Shutdown jail %s for last data sync, this could take some time.\n", cj.Name)
+			if gYesToAll == false {
+				fmt.Printf("Continue? (y/n) ")
+				scanr := bufio.NewScanner(os.Stdin)
+				scanr.Scan()
+				if false == strings.EqualFold(scanr.Text(), "y") {
+					fmt.Printf("Migration aborted. Now cleaning destination pool.\n")
+					if err := CleanMigrateMess([]string{cj.Name}); err != nil {
+						fmt.Printf("Error: %v\n", err)
+					}
+					// TODO : Remove destination datasets, or handle the cas at the beginning of current function
+					// (when snapshot already exist on source and dest)
+					return
+				}
+			}
+			
+			StopJail([]string{cj.Name})
+			
+			fmt.Printf("Snapshot %s: ", dsconf)
+			if err = zfsSnapshot(dsconf, "gocage_mig_last_sync"); err != nil {
+				fmt.Printf("Error: %v\n", err)
+				return
+			}
+			fmt.Printf("Done\n")
+			fmt.Printf("Snapshot %s: ", dsdata)
+			if err := zfsSnapshot(dsdata, "gocage_mig_last_sync"); err != nil {
+				fmt.Printf("Error: %v\n", err)
+				return
+			}
+			fmt.Printf("Done\n")
+			
+			fmt.Printf("Synchronize jail config to %s: ", dsconfdest)
+			if err := zfsCopyIncremental(fmt.Sprintf("%s@gocage_mig_init", dsconf), 
+										fmt.Sprintf("%s@gocage_mig_last_sync", dsconf),  
+										 dsconfdest); err != nil {
+				fmt.Printf("Error: %v\n", err)
+				return
+			}
+			fmt.Printf("Done\n")
+			
+			fmt.Printf("Synchronize jail filesystem dataset to %s: ", dsdatadest)
+			if err := zfsCopyIncremental(fmt.Sprintf("%s@gocage_mig_init", dsdata), 
+										fmt.Sprintf("%s@gocage_mig_last_sync", dsdata),  
+										dsdatadest); err != nil {
+				return
+				fmt.Printf("Error: %v\n", err)
+			}
+			fmt.Printf("Done\n")
+			
+			// TODO : Start jail on new datastore (! Currently ListJails won't support 2 jails with same name !)
+			
+			// TODO : zfs destroy destpool/jails/jail_name@gocage_mig_first_snap
+			// TODO : zfs destroy destpool/jails/jail_name/root@gocage_mig_first_snap
+			// TODO : zfs destroy -r srcpool/iocage/jails/$jail
+		}
+	}
+}
+
+// Clean snapshots from an aborted migration
+func CleanMigrateMess(args []string) error {
+	var jailNames []string
+
+	if len(args) > 0 {
+		for _, a := range args {
+			jailNames = append(jailNames, a)
+		}
+	}
+
+	for _, jn := range jailNames {
+		cj, err := getJailFromArray(jn, gJails)
+		if cj == nil {
+			return errors.New(fmt.Sprintf("Error getting jail %s: Not found\n", jn))
+		}
+		curDS, err := getDatastoreFromArray(cj.Datastore, gDatastores)
+		if err != nil {
+			return errors.New(fmt.Sprintf("Error getting datastore \"%s\": %v\n", cj.Datastore, err))
+		}
+		
+		cmd := fmt.Sprintf("zfs destroy %s@gocage_mig_init", strings.Join([]string{curDS.ZFSDataset, "jails", jn}, "/"))
+		out, err := executeCommand(cmd)
+		if err != nil {
+			if false == strings.HasSuffix(out, "could not find any snapshots to destroy; check snapshot names.\n") {
+				fmt.Printf("Error executing command %s: %v; command returned: %s\n", cmd, err, out)
+				return errors.New(fmt.Sprintf("Error executing command %s: %v; command returned: %s\n", cmd, err, out))
+			}
+		}
+		cmd = fmt.Sprintf("zfs destroy %s@gocage_mig_init", strings.Join([]string{curDS.ZFSDataset, "jails", jn, "root"}, "/"))
+		out, err = executeCommand(cmd)
+		if err != nil {
+			if false == strings.HasSuffix(out, "could not find any snapshots to destroy; check snapshot names.\n") {
+				fmt.Printf("Error executing command %s: %v; command returned: %s\n", cmd, err, out)
+				return errors.New(fmt.Sprintf("Error executing command %s: %v; command returned: %s\n", cmd, err, out))
+			}
+		}
+		cmd = fmt.Sprintf("zfs destroy %s@gocage_mig_last_sync", strings.Join([]string{curDS.ZFSDataset, "jails", jn}, "/"))
+		out, err = executeCommand(cmd)
+		if err != nil {
+			if false == strings.HasSuffix(out, "could not find any snapshots to destroy; check snapshot names.\n") {
+				fmt.Printf("Error executing command %s: %v; command returned: %s\n", cmd, err, out)
+				return errors.New(fmt.Sprintf("Error executing command %s: %v; command returned: %s\n", cmd, err, out))
+			}
+		}
+		cmd = fmt.Sprintf("zfs destroy %s@gocage_mig_last_sync", strings.Join([]string{curDS.ZFSDataset, "jails", jn, "root"}, "/"))
+		out, err = executeCommand(cmd)
+		if err != nil {
+			if false == strings.HasSuffix(out, "could not find any snapshots to destroy; check snapshot names.\n") {
+				fmt.Printf("Error executing command %s: %v; command returned: %s\n", cmd, err, out)
+				return errors.New(fmt.Sprintf("Error executing command %s: %v; command returned: %s\n", cmd, err, out))
+			}
+		}
+	}
+
+	return nil
+}

cmd/properties.go

@@ -0,0 +1,123 @@
+package cmd
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+)
+
+func GetJailProperties(args []string) {
+	var props []string
+	var jail *Jail
+	var err error
+
+	if len(args) > 0 {
+		for i, a := range args {
+			// Last arg is the jail name
+			if i == len(args)-1 {
+				jail, err = getJailFromArray(a, gJails)
+				if err != nil {
+					fmt.Printf("Error: %s\n", err.Error())
+					return
+				}
+			} else {
+				props = append(props, a)
+			}
+		}
+	}
+
+	if len(jail.Name) == 0 || len(args) == 0 {
+		// TODO : Show help
+		fmt.Printf("Error\n")
+		return
+	}
+	
+	if isStringInArray(props, "all") {
+		var result []string
+		result = getStructFieldNames(*jail, result, "")
+		props = result
+	}
+
+	for _, p := range props {
+		v, err := getJailProperty(jail, p)
+		if err != nil {
+			fmt.Printf("Error: %s\n", err.Error())
+			return
+		} else {
+			fmt.Printf("%s = %s\n", p, v)
+		}
+	}
+}
+
+func getJailProperty(jail *Jail, propName string) (string, error) {
+	val, _, err := getStructFieldValue(jail, propName)
+	if err != nil {
+		return "", err
+	}
+
+	switch val.Kind() {
+	case reflect.String:
+		return val.String(), nil
+	case reflect.Int:
+		return strconv.FormatInt(val.Int(), 10), nil
+	case reflect.Bool:
+		return strconv.FormatBool(val.Bool()), nil
+	default:
+		return "", errors.New(fmt.Sprintf("Error: Unknown type for property %s: %s\n", propName, val.Kind()))
+	}
+
+	return "", errors.New("Unknown error in getJailProperty")
+}
+
+func SetJailProperties(args []string) {
+	type properties struct {
+		name  string
+		value string
+	}
+
+	var jail Jail
+	var props []properties
+
+	if len(args) > 0 {
+		for i, a := range args {
+			// This is the jail name
+			if i == len(args)-1 {
+				jail.Name = a
+			} else {
+				kv := strings.Split(a, "=")
+				if len(kv) != 2 {
+					// TODO : Show help
+					fmt.Printf("Error parsing args: %s\n", a)
+					return
+				} else {
+					p := properties{name: kv[0], value: kv[1]}
+					props = append(props, p)
+				}
+			}
+		}
+	}
+
+	if len(jail.Name) == 0 || len(args) == 0 {
+		// TODO : Show help
+		fmt.Printf("Error\n")
+		return
+	}
+
+	// Get jail by index to modify it
+	for i, _ := range gJails {
+		if gJails[i].Name == jail.Name {
+			for _, p := range props {
+				err := setStructFieldValue(&gJails[i], p.name, p.value)
+				if err != nil {
+					fmt.Printf("Error: %s\n", err.Error())
+					return
+				} else {
+					fmt.Printf("%s: %s set to %s\n", gJails[i].Name, p.name, p.value)
+					gJails[i].ConfigUpdated = true
+				}
+			}
+		}
+	}
+}

cmd/root.go

@@ -3,40 +3,70 @@ package cmd
 import (
 	"os"
 	"fmt"
-	"strconv"
+	"sync"
 	"strings"
+	"io/ioutil"
 	"encoding/json"
 
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+	// TODO : Use log
+	log "github.com/sirupsen/logrus"
 )
 
 const (
-	gVersion = "0.023"
+	gVersion = "0.34"
+	
+	// TODO : Get from $jail_zpool/defaults.json
+	MIN_DYN_DEVFS_RULESET = 1000
 )
 
 var (
-	gJails			[]Jail
+	gJailHost   JailHost
+	gJails      []Jail
+	gDatastores []Datastore
 
-	gUseSudo		bool
+	gUseSudo bool
+	gForce   bool
+	gDebug   bool
 
-	gConfigFile		string
-	gDisplayColumns	string
-	gFilterJails	string
-	gSortFields		string
-	gNoLineSep		bool
+	gConfigFile      string
+	gDisplayJColumns string
+	gDisplaySColumns string
+	gDisplayDColumns string
+	gFilterJails     string
+	gFilterSnaps     string
+	gFilterDS        string
+	gSortJailFields  string
+	gSortSnapFields  string
+	gSortDSFields    string
+	gNoJailLineSep   bool
+	gNoSnapLineSep   bool
+	gNoDSLineSep     bool
 
-	gHostVersion	float64
+	gHostVersion float64
 
+	gTimeZone     string
+	gSnapshotName string
 
-	rootCmd = & cobra.Command{
-		Use:    "gocage",
-		Short:  "GoCage is a FreeBSD Jail management tool",
-		Long:   `GoCage is a jail management tool. It support VNET, host-only, NAT networks. Provides snapshots and cloning.
+	gMigrateDestDatastore string
+	gYesToAll             bool
+
+	gFetchRelease    string
+	gFetchIntoDS     string
+	gFetchFrom       string
+
+	gMdevfs          sync.Mutex
+
+	rootCmd = &cobra.Command{
+		Use:   "gocage",
+		Short: "GoCage is a FreeBSD Jail management tool",
+		Long: `GoCage is a jail management tool. It support VNET, host-only, NAT networks. Provides snapshots and cloning.
 It support iocage jails and can coexist with iocage.`,
 		Run: func(cmd *cobra.Command, args []string) {
-			fmt.Println("Here we are in the Run")
-			cleanAfterRun()
+			fv, _ := getFreeBSDVersion()
+			fmt.Printf("GoCage v.%s on FreeBSD %d.%d-%s\n", gVersion, fv.major, fv.minor, fv.flavor)
+			fmt.Printf("Use -h flag to display help\n")
 		},
 	}
 
@@ -45,20 +75,19 @@ It support iocage jails and can coexist with iocage.`,
 		Short: "Print the version number of GoCage",
 		Long:  `Let this show you how much fail I had to get this *cough* perfect`,
 		Run: func(cmd *cobra.Command, args []string) {
-			fmt.Printf("GoCage v.%s on FreeBSD %.1f\n", gVersion, gHostVersion)
-			cleanAfterRun()
-	    },
+			fv, _ := getFreeBSDVersion()
+			fmt.Printf("GoCage v.%s on FreeBSD %d.%d-%s\n", gVersion, fv.major, fv.minor, fv.flavor)
+		},
 	}
 
 	listCmd = &cobra.Command{
 		Use:   "list",
 		Short: "Print jails",
-		Long:  `Display jails, their IP and OS.
+		Long: `Display jails, their IP and OS.
 Jail list can be restricted by adding name on command line
 ex: gocage list srv-db srv-web`,
 		Run: func(cmd *cobra.Command, args []string) {
 			ListJails(args, true)
-			cleanAfterRun()
 		},
 	}
 
@@ -68,19 +97,31 @@ ex: gocage list srv-db srv-web`,
 		Long:  "Display jails properties. You can use properties to filter, get or set them.",
 		Run: func(cmd *cobra.Command, args []string) {
 			ListJailsProps(args)
-			cleanAfterRun()
 		},
 	}
 	
+/*	destroyCmd = &cobra.Command{
+		Use:   "destroy",
+		Short: "destroy jails",
+		Long: `Destroy jail filesystem, snapshots and configuration file.`,
+		Run: func(cmd *cobra.Command, args []string) {
+			ListJails(args, false)
+			DestroyJails(args)
+		},
+	}
+*/
 	stopCmd = &cobra.Command{
 		Use:   "stop",
 		Short: "stop jail",
 		Long:  "shutdown jail",
 		Run: func(cmd *cobra.Command, args []string) {
-			// Get the inventory
+			// Load inventory
 			ListJails(args, false)
-			StopJail(args)
-			cleanAfterRun()
+			if len(args) == 0 {
+				StopAllRunningJails()
+			} else {
+				StopJail(args)
+			}
 		},
 	}
 
@@ -88,58 +129,283 @@ ex: gocage list srv-db srv-web`,
 		Use:   "start",
 		Short: "start jail",
 		Run: func(cmd *cobra.Command, args []string) {
-			// Get the inventory
+			// Load inventory
 			ListJails(args, false)
+			if len(args) == 0 {
+				StartJailsAtBoot()
+			} else {
+				StartJail(args)
+			}
+			WriteConfigToDisk("", false, false)
+		},
+	}
+	
+	
+	
+	restartCmd = &cobra.Command{
+		Use:   "restart",
+		Short: "restart jail",
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			StopJail(args)
 			StartJail(args)
-			cleanAfterRun()
+			WriteConfigToDisk("", false, false)
+		},
+	}
+	
+	shellCmd = &cobra.Command {
+		Use:   "console",
+		Short: "Execute shell on jail",
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			ShellJail(args)
 		},
 	}
 	
 	setCmd = &cobra.Command{
 		Use:   "set",
 		Short: "Set a jail property",
-		Long:  `Set jail property value. Specify property=value, end command with jail name.
+		Long: `Set jail property value. Specify property=value, end command with jail name.
 Multiples properties can be specified, separated with space (Ex: gocage set allow_mlock=1 boot=1 myjail)`,
 		Run: func(cmd *cobra.Command, args []string) {
-			// Get the inventory
+			// Load inventory
 			ListJails(args, false)
 			SetJailProperties(args)
-			cleanAfterRun()
+			WriteConfigToDisk("", true, false)
+		},
+	}
+
+	getCmd = &cobra.Command{
+		Use:   "get",
+		Short: "Get a jail property",
+		Long: `Get jail property value. Specify property, end command with jail name.
+Multiples properties can be specified, separated with space (Ex: gocage get allow_mlock boot myjail)
+For all properties specify "all" (Ex: gocage get all myjail)`,
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			GetJailProperties(args)
+		},
+	}
+
+	snapshotCmd = &cobra.Command{
+		Use:   "snapshot",
+		Short: "snapshot jail",
+		Long:  "Commands to manage jail snapshots. If no arguments given, ",
+		Run: func(cmd *cobra.Command, args []string) {
+
+		},
+	}
+
+	snapshotListCmd = &cobra.Command{
+		Use:   "list",
+		Short: "list snapshots",
+		Long: `List snapshots of a jail by specifying its name. 
+List all snapshots if no jail name specified.
+You can specify multiple jails.`,
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			ListJailsSnapshots(args)
+		},
+	}
+
+	snapshotCreateCmd = &cobra.Command{
+		Use:   "create",
+		Short: "create snapshots",
+		Long:  `Create snapshot of a jail by specifying snapshot name and jail name.`,
+		//		You can specify multiple jails.`,
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			CreateJailSnapshot(args)
+		},
+	}
+
+	snapshotRollbackCmd = &cobra.Command{
+		Use:   "rollback",
+		Short: "Rollback snapshots",
+		Long:  `Rollback jail to specifyed snapshot.`,
+		//		You can specify multiple jails.`,
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			RollbackJailSnapshot(args)
+		},
+	}
+
+	snapshotDeleteCmd = &cobra.Command{
+		Use:   "destroy",
+		Short: "destroy snapshots",
+		Long:  `Destroy snapshot of a jail by specifying snapshot name and jail name.
+				You can specify multiple snapshots separated by comma.`,
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			DeleteJailSnapshot(args)
+		},
+	}
+
+	migrateCmd = &cobra.Command{
+		Use:   "migrate",
+		Short: "Migrate jail to another datastore",
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			MigrateJail(args)
+			WriteConfigToDisk("", false, false)
+		},
+	}
+
+	migrateCleanCmd = &cobra.Command{
+		Use:   "clean",
+		Short: "Clean previous aborted/in error jail migration",
+		Run: func(cmd *cobra.Command, args []string) {
+			// Load inventory
+			ListJails(args, false)
+			err := CleanMigrateMess(args)
+			if err != nil {
+				fmt.Printf("%v", err)
+			}
+		},
+	}
+	
+	datastoreCmd = &cobra.Command{
+		Use:   "datastore",
+		Short: "list datastores",
+		Long:  "Commands to manage datastores. If no arguments given, list them.",
+		Run: func(cmd *cobra.Command, args []string) {
+			ListDatastores(args, true)
+		},
+	}
+	
+	datastoreListCmd = &cobra.Command{
+		Use:   "list",
+		Short: "list datastores",
+		Long: `List datastore by specifying its name. 
+List all datastores if no name specified.
+You can specify multiple datastores.`,
+		Run: func(cmd *cobra.Command, args []string) {
+			ListDatastores(args, true)
+		},
+	}
+	
+	fetchCmd = &cobra.Command{
+		Use:   "fetch",
+		Short: "Fetch FreeBSD release to local datastore",
+		Run: func(cmd *cobra.Command, args []string) {
+			err := fetchRelease(gFetchRelease, "http", gJailHost.arch, gFetchIntoDS, gFetchFrom)
+			if err != nil {
+				fmt.Printf("%v\n", err)
+			} else {
+				extractRelease(gFetchRelease, gFetchIntoDS)
+			}
+	 },
+	}
+	
+	UpdateCmd = &cobra.Command{
+		Use:   "update",
+	 Short: "Update FreeBSD release",
+	 Run: func(cmd *cobra.Command, args []string) {
+		 ListJails(args, false)
+		 UpdateJail(args)
+	 },
+	}
+	
+	testCmd = &cobra.Command{
+		Use:   "test",
+		Short: "temporary command to test some code snippet",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Printf("Nope\n")
 		},
 	}
 )
 
-
-
+// TODO : Init log level and log output
 func init() {
-    cobra.OnInitialize(initConfig)
+	var err error
 	
-// Global switches
+	cobra.OnInitialize(initConfig)
+
+	// Global switches
 	rootCmd.PersistentFlags().StringVarP(&gConfigFile, "config", "c", "/usr/local/etc/gocage.conf.yml", "GoCage configuration file")
 	rootCmd.PersistentFlags().BoolVarP(&gUseSudo, "sudo", "u", false, "Use sudo to run commands")
+	rootCmd.PersistentFlags().StringVarP(&gTimeZone, "timezone", "t", "", "Specify timezone. Will get from /var/db/zoneinfo if not set.")
+	rootCmd.PersistentFlags().BoolVar(&gDebug, "debug", false, "Debug mode")
 
-// Command dependant switches
-	listCmd.PersistentFlags().StringVarP(&gDisplayColumns, "outcol", "o", "JID,Name,Config.Release,Config.Ip4_addr,Running", "Show these columns in output")
-	listCmd.PersistentFlags().BoolVarP(&gNoLineSep, "nolinesep", "l", false, "Do not display line separator between jails")
-	listCmd.PersistentFlags().StringVarP(&gFilterJails, "filter", "f", "none", "Only display jails with these values. Ex: \"gocage list -f Config.Boot=1\" will only list started on boot jails")
-	listCmd.PersistentFlags().StringVarP(&gSortFields, "sort", "s", "none", "Display jails sorted by field values. Ex: \"gocage list -s +Name,-Config.Priority\" will sort jails by their decreasing name, then increasing start priority. 3 critera max supported.")
+	// Command dependant switches
 
-// Now declare commands
+	// We reuse these flags in "gocage snapshot list myjail" and 'gocage datastore list" commands
+	listCmd.Flags().StringVarP(&gDisplayJColumns, "outcol", "o", "JID,Name,Config.Release,Config.Ip4_addr,Running", "Show these columns in output")
+	listCmd.Flags().BoolVarP(&gNoJailLineSep, "nolinesep", "l", false, "Do not display line separator between jails")
+	listCmd.Flags().StringVarP(&gFilterJails, "filter", "f", "none", "Only display jails with these values. Ex: \"gocage list -f Config.Boot=1\" will only list started on boot jails")
+	listCmd.Flags().StringVarP(&gSortJailFields, "sort", "s", "none", "Display jails sorted by field values. Ex: \"gocage list -s +Name,-Config.Priority\" will sort jails by their decreasing name, then increasing start priority. 3 critera max supported.")
+	
+//	destroyCmd.Flags().BoolVarP(&gForce, "force", "f", false, "Force stop jail if running")
+
+	snapshotListCmd.Flags().StringVarP(&gDisplaySColumns, "outcol", "o", "Jailname,Name,Creation,Referenced,Used", "Show these columns in output")
+	snapshotListCmd.Flags().BoolVarP(&gNoSnapLineSep, "nolinesep", "l", false, "Do not display line separator between snapshots")
+	snapshotListCmd.Flags().StringVarP(&gFilterSnaps, "filter", "f", "none", "Only display snapshots with these values. Ex: \"gocage snapshot list -f Config.Boot=1\" will only list started on boot jails")
+	snapshotListCmd.Flags().StringVarP(&gSortSnapFields, "sort", "s", "none", "Display snapshots sorted by field values. Ex: \"gocage snapshot list -s +Jailname,-Used\" will sort snapshots by jail decreasing name, then increasing used space. 3 critera max supported.")
+	
+	datastoreListCmd.Flags().StringVarP(&gDisplayDColumns, "outcol", "o", "Name,Mountpoint,ZFSDataset,Available,Used,Referenced", "Show these columns in output")
+	datastoreListCmd.Flags().BoolVarP(&gNoDSLineSep, "nolinesep", "l", false, "Do not display line separator between datastores")
+	datastoreListCmd.Flags().StringVarP(&gFilterDS, "filter", "f", "none", "Only display datastores with these values. Ex: \"gocage datastore list -f Config.Boot=1\" will only list started on boot jails")
+	datastoreListCmd.Flags().StringVarP(&gSortDSFields, "sort", "s", "none", "Display datastores sorted by field values. Ex: \"gocage datastore list -s +Jailname,-Used\" will sort snapshots by jail decreasing name, then increasing used space. 3 critera max supported.")
+	
+	// This is local flag : Only available to gocage snapshot create command
+	snapshotCreateCmd.Flags().StringVarP(&gSnapshotName, "snapname", "n", "", "Name of the snapshot to create")
+	snapshotCreateCmd.MarkFlagRequired("snapname")
+	snapshotDeleteCmd.Flags().StringVarP(&gSnapshotName, "snapname", "n", "", "Name of the snapshot to destroy")
+	snapshotDeleteCmd.MarkFlagRequired("snapname")
+	snapshotRollbackCmd.Flags().StringVarP(&gSnapshotName, "snapname", "n", "", "Name of the snapshot to rollback to")
+	snapshotRollbackCmd.MarkFlagRequired("snapname")
+
+	migrateCmd.Flags().StringVarP(&gMigrateDestDatastore, "datastore", "d", "", "Path of destination datastore for jail (Ex: \"/iocage\")")
+	migrateCmd.Flags().BoolVarP(&gYesToAll, "yes", "y", false, "Answer yes to all questions")
+	migrateCmd.MarkFlagRequired("datastore")
+	
+	fetchCmd.Flags().StringVarP(&gFetchRelease, "release", "r", "", "Release to fetch (e.g.: \"13.1\"")
+	fetchCmd.Flags().StringVarP(&gFetchIntoDS, "datastore", "o", "", "Datastore release will be saved to")
+	fetchCmd.Flags().StringVarP(&gFetchFrom, "from", "d", "", "Repository to download from. Should contain XY.Z-RELEASE. File protocol supported")
+	fetchCmd.MarkFlagRequired("release")
+	fetchCmd.MarkFlagRequired("datastore")
+	
+
+	// Now declare commands
 	rootCmd.AddCommand(versionCmd)
 	rootCmd.AddCommand(listCmd)
 	listCmd.AddCommand(listPropsCmd)
 	rootCmd.AddCommand(stopCmd)
 	rootCmd.AddCommand(startCmd)
+	rootCmd.AddCommand(restartCmd)
+//	rootCmd.AddCommand(destroyCmd)
+	rootCmd.AddCommand(shellCmd)
+	rootCmd.AddCommand(getCmd)
 	rootCmd.AddCommand(setCmd)
+	rootCmd.AddCommand(snapshotCmd)
+	rootCmd.AddCommand(migrateCmd)
+	rootCmd.AddCommand(datastoreCmd)
+	rootCmd.AddCommand(fetchCmd)
+	rootCmd.AddCommand(UpdateCmd)
 	
-	// Get FreeBSD version
-	out, err := executeCommand("freebsd-version")
+	rootCmd.AddCommand(testCmd)
+	
+	snapshotCmd.AddCommand(snapshotListCmd)
+	snapshotCmd.AddCommand(snapshotCreateCmd)
+	snapshotCmd.AddCommand(snapshotDeleteCmd)
+	snapshotCmd.AddCommand(snapshotRollbackCmd)
+	migrateCmd.AddCommand(migrateCleanCmd)
+	datastoreCmd.AddCommand(datastoreListCmd)
+
+	// Get FreeBSD version, hostname, hostid
+	gJailHost, err = NewJailHost()
 	if err != nil {
-		fmt.Printf("Error running \"freebsd-version\": %s", err.Error())
+		fmt.Printf("Error initializing JailHost properties: %v\n", err)
 		os.Exit(1)
 	}
-	gHostVersion, _ = strconv.ParseFloat(strings.Split(out, "-")[0], 32)
-	
 }
 
 func initConfig() {
@@ -148,8 +414,6 @@ func initConfig() {
 		os.Exit(1)
 	}
 
-//	fmt.Printf("We are in initConfig(), with config file %s\n", gConfigFile)
-
 	viper.SetConfigFile(gConfigFile)
 
 	if err := viper.ReadInConfig(); err != nil {
@@ -157,56 +421,121 @@ func initConfig() {
 		os.Exit(1)
 	}
 	
-//	fmt.Println("Using config file:", viper.ConfigFileUsed())
-//	fmt.Printf("datastore in config : %s\n", viper.GetStringSlice("datastore"))
-//	fmt.Printf("datastore.0 in config : %s\n", viper.GetStringSlice("datastore.0"))
+	// Load default configs from datastores
+	err := ListDatastores(viper.GetStringSlice("datastore"), false)
+	if err != nil {
+		fmt.Printf("ERROR: error checking datastores: %v\n", err)
+		os.Exit(1)
+	}
+
+	//	fmt.Println("Using config file:", viper.ConfigFileUsed())
+	//	fmt.Printf("datastore in config : %s\n", viper.GetStringSlice("datastore"))
+	//	fmt.Printf("datastore.0 in config : %s\n", viper.GetStringSlice("datastore.0"))
 
 	// Command line flags have priority on config file
 	if rootCmd.Flags().Lookup("sudo") != nil && false == rootCmd.Flags().Lookup("sudo").Changed {
 		gUseSudo = viper.GetBool("sudo")
 	}
+	if rootCmd.Flags().Lookup("timezone") != nil && false == rootCmd.Flags().Lookup("timezone").Changed {
+		gTimeZone = viper.GetString("timezone")
+	}
+	// If neither on cmdline nor config file, get from /var/db/zoneinfo
+	if len(gTimeZone) == 0 {
+		tz, err := ioutil.ReadFile("/var/db/zoneinfo")
+		if err != nil {
+			fmt.Println("Error reading /var/db/zoneinfo: %s\n", err.Error())
+			os.Exit(1)
+		}
+		gTimeZone = strings.Trim(string(tz), "\n")
+	}
 	if listCmd.Flags().Lookup("outcol") != nil && false == listCmd.Flags().Lookup("outcol").Changed {
-		gDisplayColumns = viper.GetString("outcol")
+		gDisplayJColumns = viper.GetString("outcol")
 	}
 	if listCmd.Flags().Lookup("nolinesep") != nil && false == listCmd.Flags().Lookup("nolinesep").Changed {
-		gNoLineSep = viper.GetBool("nolinesep")
+		gNoJailLineSep = viper.GetBool("nolinesep")
 	}
 	if listCmd.Flags().Lookup("filter") != nil && false == listCmd.Flags().Lookup("filter").Changed {
 		gFilterJails = viper.GetString("filter")
 	}
 	if listCmd.Flags().Lookup("sort") != nil && false == listCmd.Flags().Lookup("sort").Changed {
-		gSortFields = viper.GetString("sort")
+		gSortJailFields = viper.GetString("sort")
 	}
-	if len(strings.Split(gSortFields, ",")) > 3 {
-		fmt.Printf("More than 3 sort criteria, this is not supported!\n")
+	if len(strings.Split(gSortJailFields, ",")) > 3 {
+		fmt.Printf("More than 3 sort criteria is not supported!\n")
 		os.Exit(1)
 	}
+	
+	
+	if gDebug {
+		log.SetLevel(log.DebugLevel)
+		log.Debugf("Debug mode enabled\n")
+	}
 }
 
-// Called after execution
-func cleanAfterRun() {
+/********************************************************************************
+ * Write jail(s) config which been updated to disk.
+ * If name is specified, work on the jail. If name is empty string, work on all.
+ * If changeauto not set, values which are in "auto" mode on disk
+ *  won't be overwritten (p.ex defaultrouter wont be overwritten with current
+ *  default route, so if route change on jailhost this will reflect on jail next
+ *  start)
+ *******************************************************************************/
+func WriteConfigToDisk(jailName string, changeauto bool, forceWrite bool) {
 	for _, j := range gJails {
-		if j.ConfigUpdated {
-			// TODO : Marshall to disk
-			//fmt.Printf("Config for jail %s will be updated\n", j.Name)
-			marshaled, err := json.MarshalIndent(j.Config, "", "    ")
-			if err != nil {
-				fmt.Printf("ERROR marshaling config: %s\n", err.Error())
-			}
-			//fmt.Printf(string(marshaled))
-			if os.WriteFile(j.ConfigPath, []byte(marshaled), 0644); err != nil {
-				fmt.Printf("Error writing config file %s: %v\n", j.ConfigPath, err)
-				os.Exit(1)
+		if len(jailName) > 0 && j.Name == jailName || len(jailName) == 0 {
+			if j.ConfigUpdated || forceWrite {
+				log.Debug("%s config has changed, write changes to disk\n", j.Name)
+
+				// we will manipulate properties so get a copy
+				jc := j.Config
+
+				if changeauto == false {
+					// Overwrite "auto" properties
+					ondiskjc, err := getJailConfig(j.ConfigPath)
+					if err != nil {
+						panic(err)
+					}
+					// TODO : List all fields, then call getStructFieldValue to compare value with "auto"
+					// If "auto" then keep it that way before writing ondiskjc to disk
+					var properties []string
+					properties = getStructFieldNames(ondiskjc, properties, "")
+
+					for _, p := range properties {
+						v, _, err := getStructFieldValue(ondiskjc, p)
+						if err != nil {
+							panic(err)
+						}
+						if v.String() == "auto" {
+							err = setStructFieldValue(&jc, p, "auto")
+							if err != nil {
+								fmt.Printf("ERROR sanitizing config: %s\n", err.Error())
+								os.Exit(1)
+							}
+						}
+					}
+				}
+
+				marshaled, err := json.MarshalIndent(jc, "", "    ")
+				if err != nil {
+					fmt.Printf("ERROR marshaling config: %s\n", err.Error())
+				}
+				
+				//fmt.Printf("DEBUG: Will write config to disk, with content:\n")
+				//fmt.Printf(string(marshaled))
+				
+				if os.WriteFile(j.ConfigPath, []byte(marshaled), 0644); err != nil {
+					fmt.Printf("Error writing config file %s: %v\n", j.ConfigPath, err)
+					os.Exit(1)
+				}
 			}
 		}
 	}
 }
 
+
 func Execute() {
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
 	}
 }
-
-

cmd/snapshots.go

@@ -0,0 +1,330 @@
+package cmd
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"reflect"
+	"time"
+)
+
+/********************************************************************************
+ * List all snapshots jails have
+ *******************************************************************************/
+func ListJailsSnapshots(args []string) {
+	var jailNames []string
+	var snapshots []Snapshot
+
+	/***************************************************************
+	/   Filter snapshots by jailname
+	/**************************************************************/
+	if len(args) > 0 {
+		for _, a := range args {
+			/*if countOfJailsWithThisName(a) > 1 {
+				fmt.Printf("Nope")
+				return
+			}*/
+			jailNames = append(jailNames, a)
+		}
+	}
+
+	if len(jailNames) == 0 || len(args) == 0 {
+		for _, j := range gJails {
+			snapshots = append(snapshots, listJailSnapshots(j)...)
+		}
+	} else {
+		for _, cj := range gJails {
+			for _, jn := range jailNames {
+				if strings.EqualFold(cj.Name, jn) {
+					snapshots = append(snapshots, listJailSnapshots(cj)...)
+				}
+			}
+		}
+	}
+	
+	fields := strings.Split(gDisplaySColumns, ",")
+	
+	/***************************************************************
+	/   Sort snapshots
+	/     We support 3 sort criteria max
+	/**************************************************************/
+	if len(gSortSnapFields) > 0 && gSortSnapFields != "none" {		
+		ss := initSnapshotSortStruct()
+
+		// The way we manage criteria quantity is not very elegant...
+		var fct1, fct2, fct3 *reflect.Value
+		for i, c := range strings.Split(gSortSnapFields, ",") {
+			var fctName string
+			if strings.HasPrefix(c, "-") {
+				fctName = fmt.Sprintf("%sDec", strings.Replace(c, "-", "", 1))
+			} else { // Par defaut (pas de prefix +/-) on considere un tri incremental
+				fctName = fmt.Sprintf("%sInc", strings.Replace(c, "+", "", 1))
+			}
+
+			// Get function by its name
+			fct, _, err := getStructFieldValue(ss, fctName)
+			
+			if err != nil {
+				fieldName := strings.Replace(strings.Replace(c, "-", "", 1), "+", "", 1)
+				fmt.Printf("ERROR getting SnapshotSort struct field %s. Please check the field name: %s\n", fctName, fieldName)
+				return
+			}
+			switch i + 1 {
+			case 1:
+				fct1 = fct
+			case 2:
+				fct2 = fct
+			case 3:
+				fct3 = fct
+			}
+		}
+
+		switch len(strings.Split(gSortSnapFields, ",")) {
+		case 1:
+			SnapshotsOrderedBy(fct1.Interface().(snapshotLessFunc)).Sort(snapshots)
+		case 2:
+			SnapshotsOrderedBy(fct1.Interface().(snapshotLessFunc), fct2.Interface().(snapshotLessFunc)).Sort(snapshots)
+		case 3:
+			SnapshotsOrderedBy(fct1.Interface().(snapshotLessFunc), fct2.Interface().(snapshotLessFunc), fct3.Interface().(snapshotLessFunc)).Sort(snapshots)
+		}
+	}
+	
+	displaySnapshotsFields(snapshots, fields)
+}
+
+/********************************************************************************
+ * List all snapshots a jail have
+ *******************************************************************************/
+func listJailSnapshots(jail Jail) []Snapshot {
+	var snapshots []Snapshot
+
+	// 1. List all datasets
+	// TODO : Include mounted filesystems?
+	
+	curDS, err := getDatastoreFromArray(jail.Datastore, gDatastores)
+	if err != nil {
+		fmt.Printf("Error getting datastore \"%s\": %v\n", jail.Datastore, err)
+		return snapshots
+	}
+	
+	rootDataset := fmt.Sprintf("%s/%s/%s", curDS.ZFSDataset, "jails", jail.Name)
+	cmd := fmt.Sprintf("zfs list -p -r -H -o name,mountpoint,used,referenced,creation -t snapshot %s", rootDataset)
+	out, err := executeCommand(cmd)
+	if err != nil {
+		fmt.Printf("Error: %s\n", err.Error())
+		return snapshots
+	}
+	
+	for _, line := range strings.Split(out, "\n") {
+		if len(line) > 0 {
+			ls := strings.Split(line, "\t")
+			// Parse creation date so we can use it to sort snapshots
+			//creationts, err := time.ParseInLocation(dateLayout, ls[4], loc)
+			creationts, err := strconv.ParseInt(ls[4], 10, 64)
+			if err != nil {
+				fmt.Println("Error while parsing date %s:", ls[4], err)
+				return snapshots
+			}
+			// Get subdir to append to snapshot name
+			subdir := strings.Replace(strings.Split(ls[0], "@")[0], rootDataset, "", 1)
+
+			u, _ := strconv.ParseUint(ls[2], 10, 64)
+			r, _ := strconv.ParseUint(ls[3], 10, 64)
+			snapshots = append(snapshots, Snapshot{Datastore: curDS.Name,
+				Name:       fmt.Sprintf("%s%s", strings.Split(ls[0], "@")[1], subdir),
+				Jailname:   jail.Name,
+				Mountpoint: ls[1],
+				Used:       u,
+				Referenced: r,
+				Creation:   time.Unix(creationts, 0)})
+		}
+	}
+
+	// Sort snapshots by creation date
+	ss := initSnapshotSortStruct()
+	SnapshotsOrderedBy(ss.CreationInc).Sort(snapshots)
+
+	return snapshots
+}
+
+/********************************************************************************
+ * Create snapshot for jail(s)
+ *******************************************************************************/
+func CreateJailSnapshot(args []string) {
+	var jailNames []string
+
+	if len(args) > 0 {
+		for _, a := range args {
+			jailNames = append(jailNames, a)
+		}
+	}
+
+	for _, cj := range gJails {
+		for _, jn := range jailNames {
+			if strings.EqualFold(cj.Name, jn) {
+				createJailSnapshot(cj)
+			}
+		}
+	}
+}
+
+/********************************************************************************
+ * Create snapshot for a jail
+ *******************************************************************************/
+func createJailSnapshot(jail Jail) error {
+	curDS, _ := getDatastoreFromArray(jail.Datastore, gDatastores)
+	rootDataset := fmt.Sprintf("%s/%s/%s", curDS.ZFSDataset, "jails", jail.Name)
+	cmd := fmt.Sprintf("zfs snapshot -r %s@%s", rootDataset, gSnapshotName)
+
+	_, err := executeCommand(cmd)
+	if err != nil {
+		fmt.Printf("Error creating snapshot %s@%s: %s\n", rootDataset, gSnapshotName, err.Error())
+		return err
+	}
+	fmt.Printf("Snapshot %s@%s created\n", rootDataset, gSnapshotName)
+
+	return nil
+}
+
+/********************************************************************************
+ * Delete snapshot for jail(s)
+ *******************************************************************************/
+func DeleteJailSnapshot(args []string) {
+	var jailNames []string
+
+	if len(args) > 0 {
+		for _, a := range args {
+			jailNames = append(jailNames, a)
+		}
+	}
+
+	for _, cj := range gJails {
+		for _, jn := range jailNames {
+			if strings.EqualFold(cj.Name, jn) {
+				deleteJailSnapshot(cj)
+			}
+		}
+	}
+}
+
+/********************************************************************************
+ * Delete snapshot for a jail
+ *******************************************************************************/
+func deleteJailSnapshot(jail Jail) error {
+	var snaptodel []string
+
+	// Get all recursive snapshots
+	curDS, _ := getDatastoreFromArray(jail.Datastore, gDatastores)
+	rootDataset := fmt.Sprintf("%s/%s/%s", curDS.ZFSDataset, "jails", jail.Name)
+	cmd := fmt.Sprintf("zfs list -r -H -o name -t snapshot %s", rootDataset)
+	out, err := executeCommand(cmd)
+	if err != nil {
+		fmt.Printf("Error: listing snapshots: %s\n", err.Error())
+		return nil
+	}
+
+	for _, line := range strings.Split(out, "\n") {
+		if len(line) > 0 {
+			ls := strings.Split(line, "@")
+			for _, sn := range strings.Split(gSnapshotName, ",") {
+				matched, _ := regexp.Match(fmt.Sprintf("^%s(\\/.*)?$", sn), []byte(ls[1]))
+				if matched {
+					snaptodel = append(snaptodel, strings.Join(ls, "@"))
+				}
+			}
+		}
+	}
+
+	for _, s := range snaptodel {
+		cmd := fmt.Sprintf("zfs destroy %s", s)
+		_, err := executeCommand(cmd)
+		if err != nil {
+			fmt.Printf("Error deleting snapshot %s: %s\n", s, err.Error())
+			return nil
+		}
+		fmt.Printf("Snapshot %s deleted\n", s)
+	}
+
+	return nil
+}
+
+func RollbackJailSnapshot(args []string) error {
+	var jailNames []string
+
+	if len(args) > 0 {
+		for _, a := range args {
+			jailNames = append(jailNames, a)
+		}
+	}
+
+	for _, cj := range gJails {
+		for _, jn := range jailNames {
+			if strings.EqualFold(cj.Name, jn) {
+				rollbackJailSnapshot(cj)
+			}
+		}
+	}
+
+	return nil
+}
+
+/********************************************************************************
+ * rollback jail to snapshot gSnapshotName, destroy this snapshots and more
+ *   recents snapshots and bookmarks
+ *******************************************************************************/
+func rollbackJailSnapshot(jail Jail) error {
+	var snaptorb []string
+
+	if jail.Running {
+		fmt.Printf("Jail should be stoped to rollback, should we stop and rollback? (y/n)\n")
+		scanr := bufio.NewScanner(os.Stdin)
+		if scanr.Scan() {
+			if !strings.EqualFold(scanr.Text(), "y") {
+				return errors.New("Jail is running")
+			} else {
+				err := stopJail(&jail)
+				if err != nil {
+					return err
+				}
+			}
+		}
+	}
+
+	// We need to rollback parent and childs
+	// Get all recursive snapshots
+	curDS, _ := getDatastoreFromArray(jail.Datastore, gDatastores)
+	rootDataset := fmt.Sprintf("%s/%s/%s", curDS.ZFSDataset, "jails", jail.Name)
+	cmd := fmt.Sprintf("zfs list -r -H -o name -t snapshot %s", rootDataset)
+	out, err := executeCommand(cmd)
+	if err != nil {
+		fmt.Printf("Error: listing snapshots: %s\n", err.Error())
+		return err
+	}
+
+	for _, line := range strings.Split(out, "\n") {
+		if len(line) > 0 {
+			ls := strings.Split(line, "@")
+
+			matched, _ := regexp.Match(fmt.Sprintf("^%s(\\/.*)?$", gSnapshotName), []byte(ls[1]))
+			if matched {
+				snaptorb = append(snaptorb, strings.Join(ls, "@"))
+			}
+		}
+	}
+
+	for _, s := range snaptorb {
+		cmd := fmt.Sprintf("zfs rollback -r %s", s)
+		_, err := executeCommand(cmd)
+		if err != nil {
+			fmt.Printf("Error rolling back snapshot %s: %s\n", s, err.Error())
+			return err
+		}
+	}
+	fmt.Printf("Jail is back to %s\n", gSnapshotName)
+
+	return nil
+}

cmd/stop.go

@@ -3,12 +3,16 @@ package cmd
 import (
 	"os"
 	"fmt"
-//	"log"
+	//"log"
+	"sync"
 	"errors"
 	"regexp"
 	"os/exec"
-//	"reflect"
+	//"reflect"
+	"strconv"
 	"strings"
+	
+	log "github.com/sirupsen/logrus"
 )
 
 // TODO : Use SYS_RCTL_GET_RACCT syscall
@@ -38,7 +42,6 @@ func removeRctlRules(jail string, rules []string) error {
 	return nil
 }
 
-
 // TODO: Validate with  >1 dataset
 func umountAndUnjailZFS(jail *Jail) error {
 	var ds []string
@@ -48,10 +51,10 @@ func umountAndUnjailZFS(jail *Jail) error {
 
 	for _, zd := range ds {
 		// 1. Get dataset and childs
-		cmd := fmt.Sprintf("zfs list -H -r -o name -S name %s/%s", jail.Zpool, zd)
+		cmd := fmt.Sprintf("zfs list -H -r -o name -S name %s", zd)
 		out, err := executeCommand(cmd)
 		if err != nil {
-			fmt.Printf(fmt.Sprintf("ERROR listing dataset %s/%s\n", jail.Zpool, zd))
+			fmt.Printf(fmt.Sprintf("ERROR listing dataset %s\n", zd))
 			os.Exit(1)
 		}
 		for _, c := range strings.Split(out, "\n") {
@@ -69,22 +72,22 @@ func umountAndUnjailZFS(jail *Jail) error {
 	}
 
 	// 2. Unjail dataset from the host
-	cmd := fmt.Sprintf("zfs unjail %s %s/%s", jail.InternalName, jail.Zpool, ds[len(ds)-1])
+	cmd := fmt.Sprintf("zfs unjail %s %s", jail.InternalName, ds[len(ds)-1])
 	_, err := executeCommand(cmd)
 	if err != nil {
-		fmt.Printf("ERROR unjailing %s/%s: %s\n", jail.Zpool, ds[len(ds)-1], err.Error())
+		fmt.Printf("ERROR unjailing %s: %s\n", ds[len(ds)-1], err.Error())
 		return err
 	}
 
 	return nil
 }
 
-
 func destroyVNetInterfaces(jail *Jail) error {
 	for _, i := range strings.Split(jail.Config.Ip4_addr, ",") {
 		iname := fmt.Sprintf("%s.%d", strings.Split(i, "|")[0], jail.JID)
 		fmt.Printf("%s: ", iname)
 		_, err := executeCommand(fmt.Sprintf("ifconfig %s destroy", iname))
+		//_, err := executeScript(fmt.Sprintf("ifconfig %s destroy >/dev/null 2>&1", iname))
 		if err != nil {
 			return err
 		} else {
@@ -101,16 +104,17 @@ func destroyVNetInterfaces(jail *Jail) error {
 //  or else it will require a restart of "devfs" service.
 // But, stoppign the jail already removes this >1000 ID.
 // So no need to call this function.
-func deleteDevfsRuleset(jail *Jail) error {
+func deleteDevfsRuleset(ruleset int) error {
 	cmd := "devfs rule showsets"
 	out, err := executeCommand(cmd)
 	if err != nil {
 		return errors.New(fmt.Sprintf("ERROR listing rulesets: %s", err.Error()))
 	}
 	
+	rs := strconv.Itoa(ruleset)
 	for _, r := range strings.Split(out, "\n") {
-		if r == jail.Config.Devfs_ruleset {
-			cmd := fmt.Sprintf("devfs rule -s %s delset", jail.Config.Devfs_ruleset)
+		if r == rs {
+			cmd := fmt.Sprintf("devfs rule -s %d delset", ruleset)
 			_, err := executeCommand(cmd)
 			return err
 		}
@@ -119,7 +123,6 @@ func deleteDevfsRuleset(jail *Jail) error {
 	return nil
 }
 
-
 func umountJailFsFromHost(jail *Jail, mountpoint string) error {
 	cmd := "mount -p"
 	out, err := executeCommand(cmd)
@@ -135,7 +138,7 @@ func umountJailFsFromHost(jail *Jail, mountpoint string) error {
 				cmd = fmt.Sprintf("umount %s%s", jail.RootPath, mountpoint)
 				_, err := executeCommand(cmd)
 				if err != nil {
-					return errors.New(fmt.Sprintf("Error umounting %s/%s: %s", jail.RootPath, mountpoint, err.Error()))
+					return errors.New(fmt.Sprintf("Error umounting %s%s: %s", jail.RootPath, mountpoint, err.Error()))
 				}
 				return nil
 			}
@@ -145,7 +148,6 @@ func umountJailFsFromHost(jail *Jail, mountpoint string) error {
 	return nil
 }
 
-
 // Internal usage only
 func stopJail(jail *Jail) error {
 	cmd := "jail -q"
@@ -167,6 +169,79 @@ func stopJail(jail *Jail) error {
 	return nil
 }
 
+// Stop all running jails by reverse priority
+// Parallelize up to gMaxThreads
+// Only parallelize same priority level jails
+func StopAllRunningJails() {
+	var stopList []Jail
+	var wg *sync.WaitGroup
+	var curThNb int
+	var curPri int
+	
+	// Get boot enabled jails
+	for _, j := range gJails {
+		if j.Running == true {
+			stopList = append(stopList, j)
+		}
+	}
+	
+	// Order by priority
+	js := initJailSortStruct()
+	fct, _, err := getStructFieldValue(js, "Config.PriorityDec")
+	if err != nil {
+		log.Errorf("ERROR getting JailSort struct field \"Config.PriorityDec\"\n")
+		return
+	}
+	JailsOrderedBy(fct.Interface().(jailLessFunc)).Sort(stopList)
+
+
+	wg = new(sync.WaitGroup)
+	curThNb = 0
+	for i, j := range stopList {
+		jFullName := fmt.Sprintf("%s/%s", j.Datastore, j.Name)
+		log.Debugf("Stopping %s with priority %s\n", jFullName, j.Config.Priority)
+		jailPri, err := strconv.Atoi(j.Config.Priority)
+		if err != nil {
+			panic(fmt.Sprintf("Invalid format for Priority (Jail %s)\n", jFullName))
+		}
+
+		if (curThNb >= gMaxThreads || i == 0) {
+			// FIXME : Use a pool instead of waiting for all threads to run a new one
+			wg.Wait()
+			curThNb = 0
+			
+			wg.Add(1)
+			curThNb++
+			curPri = jailPri
+			go func(jailFullName string) {
+				defer wg.Done()
+				StopJail([]string{jailFullName})
+			}(jFullName)
+		} else {
+			if (curPri == jailPri) {
+				wg.Add(1)
+				curThNb++
+				go func(jailFullName string) {
+					defer wg.Done()
+					StopJail([]string{jailFullName})
+				}(jFullName)
+			} else {
+				wg.Wait()
+				curThNb = 0
+			
+				wg.Add(1)
+				curThNb++
+				curPri = jailPri
+				go func(jailFullName string) {
+					defer wg.Done()
+					StopJail([]string{jailFullName})
+				}(jFullName)
+			}
+		}
+	}
+	wg.Wait()
+}
+
 /*
 	Stop jail:
 		Remove rctl rules
@@ -191,25 +266,41 @@ func stopJail(jail *Jail) error {
 func StopJail(args []string) {
 	// Current jail were stopping
 	var cj *Jail
+	var err error
 
-	for _, j := range args {
-		fmt.Printf("> Stopping jail %s\n", j)
-
-		for _, rj := range gJails {
-			if rj.Name == j {
-				cj = &rj
-				break
-			}
-		}
-		if cj == nil {
-			fmt.Printf("Jail not found: %s\n", j)
+	for _, a := range args {
+		// Check if jail exist and is distinctly named
+		cj, err = getJailFromArray(a, gJails)
+		if err != nil {
+			fmt.Printf("Error getting jail: %s\n", err)
 			continue
 		}
+
 		if cj.Running == false {
 			fmt.Printf("Jail %s is not running!\n", cj.Name)
 			continue
 		}
 
+		fmt.Printf("> Stopping jail %s\n", a)
+
+		// Get current version to update config.json
+		cvers, err := executeCommandInJail(cj, "/bin/freebsd-version")
+		if err != nil {
+			fmt.Printf("ERROR: %s\n", err.Error())
+			return
+		}
+		cvers = strings.TrimRight(cvers, "\n")
+		
+		//fmt.Sprintf(cj.Config.Release, cvers)
+		//cj.Config.Release = cvers
+		//cj.ConfigUpdated = true
+		
+		// This is working in this context, but value is not available in WriteConfigToDisk context :/
+		setStructFieldValue(cj, "Config.Release", cvers)
+		fmt.Printf("DEBUG: release was set, now is : %s\n", cj.Config.Release)
+		
+		// We need to get the real Config object, not a copy of it		
+
 		out, err := executeCommand(fmt.Sprintf("rctl jail:%s", cj.InternalName))
 		if err == nil && len(out) > 0 {
 			fmt.Printf("  > Remove RCTL rules:\n")
@@ -221,17 +312,17 @@ func StopJail(args []string) {
 			}
 		}
 
-		if len (cj.Config.Exec_prestop) > 0 {
-			fmt.Printf("  > Execute prestop:\n")
+		if len(cj.Config.Exec_prestop) > 0 {
+			fmt.Printf("  > Execute pre-stop:\n")
 			_, err := executeCommand(cj.Config.Exec_prestop)
 			if err != nil {
 				fmt.Printf("ERROR: %s\n", err.Error())
 			} else {
-				fmt.Printf("  > Execute prestop: OK\n")
+				fmt.Printf("  > Execute pre-stop: OK\n")
 			}
 		}
 
-		if len (cj.Config.Exec_stop) > 0 {
+		if len(cj.Config.Exec_stop) > 0 {
 			fmt.Printf("  > Execute stop:\n")
 			_, err := executeCommandInJail(cj, cj.Config.Exec_stop)
 			if err != nil {
@@ -261,13 +352,13 @@ func StopJail(args []string) {
 			}
 		}
 
-		/*fmt.Printf("  > Remove devfsruleset %s:\n", cj.Config.Devfs_ruleset)
-		err = deleteDevfsRuleset(cj)
+		fmt.Printf("  > Remove devfs ruleset %d: \n", cj.Devfs_ruleset)
+		err = deleteDevfsRuleset(cj.Devfs_ruleset)
 		if err != nil {
 			fmt.Printf("ERROR: %s\n", err.Error())
 		} else {
-			fmt.Printf("  > Remove devfsruleset %s: OK\n", cj.Config.Devfs_ruleset)
-		}*/
+			fmt.Printf("  > Remove devfsruleset %d: OK\n", cj.Devfs_ruleset)
+		}
 
 		fmt.Printf("  > Stop jail %s:\n", cj.Name)
 		err = stopJail(cj)
@@ -297,15 +388,16 @@ func StopJail(args []string) {
 			}
 		}
 
-		if cj.Config.Mount_fdescfs > 0 {
+		// FIXME: /dev/fd is mounted even with Mount_fdescfs = 0 ?!
+		//if cj.Config.Mount_fdescfs > 0 {
 			fmt.Printf("  > Umount fdescfs:\n")
-			err := umountJailFsFromHost(cj, "/dev/fd")
+			err = umountJailFsFromHost(cj, "/dev/fd")
 			if err != nil {
 				fmt.Printf("ERROR: %s\n", err.Error())
 			} else {
 				fmt.Printf("  > Umount fdescfs: OK\n")
 			}
-		}
+		//}
 
 		if cj.Config.Mount_devfs > 0 {
 			fmt.Printf("  > Umount devfs:\n")
@@ -318,7 +410,6 @@ func StopJail(args []string) {
 		}
 
 		// Remove local mounts from $JAIL/fstab
-		// The way we get fstab is presumptuous
 		fstab := strings.Replace(cj.ConfigPath, "config.json", "fstab", 1)
 		mounts, err := getFstab(fstab)
 		if err != nil {
@@ -338,6 +429,44 @@ func StopJail(args []string) {
 				fmt.Printf("  > Umount mountpoints from %s: OK\n", fstab)
 			}
 		}
+		
+		// TODO: Execute poststop
+		if len(cj.Config.Exec_poststop) > 0 {
+			fmt.Printf("  > Execute post-stop:\n")
+			_, err := executeCommand(cj.Config.Exec_poststop)
+			if err != nil {
+				fmt.Printf("ERROR: %s\n", err.Error())
+			} else {
+				fmt.Printf("  > Execute post-stop: OK\n")
+			}
+		}
+		
+		// Remove parameter file
+		pfile := fmt.Sprintf("/var/run/jail.%s.conf", cj.InternalName)
+		if err = os.Remove(pfile); err != nil {
+			fmt.Printf("Error deleting parameter file %s\n", pfile)
+		}
+		
+		// We need this to get a reference to cj.Running (bc cj.Running is just a copy of value in the scope of StopJail())
+		for i, j := range gJails {
+			if strings.EqualFold(j.Name, cj.Name) && strings.EqualFold(j.Datastore, cj.Datastore) {
+				if err = setStructFieldValue(&gJails[i], "Running", "false"); err != nil {
+					fmt.Printf("ERROR: setting Running property to false: %s\n", err.Error())
+				}
+				if err = setStructFieldValue(&gJails[i], "JID", "0"); err != nil {
+					fmt.Printf("ERROR: setting JID property to 0: %s\n", err.Error())
+				}
+				if err = setStructFieldValue(&gJails[i], "InternalName", ""); err != nil {
+					fmt.Printf("ERROR: clearing InternalName property: %s\n", err.Error())
+				}
+				if err = setStructFieldValue(&gJails[i], "Devfs_ruleset", "0"); err != nil {
+					fmt.Printf("ERROR: setting Devfs_ruleset property to 0: %s\n", err.Error())
+				}
+			}
+		}
+
+		fmt.Printf("DEBUG: release = %s\n", cj.Config.Release)
+		WriteConfigToDisk(cj.Name, false, true)
+
 	}
 }
-

cmd/update.go

@@ -0,0 +1,157 @@
+package cmd
+
+import (
+	"os"
+	"fmt"
+	//"log"
+	"time"
+)
+
+const (
+	fbsdUpdateConfig = `
+	# $FreeBSD: releng/12.2/usr.sbin/freebsd-update/freebsd-update.conf 337338 2018-08-04 22:25:41Z brd $
+	
+	# Trusted keyprint.  Changing this is a Bad Idea unless you've received
+	# a PGP-signed email from <security-officer@FreeBSD.org> telling you to
+	# change it and explaining why.
+	KeyPrint 800651ef4b4c71c27e60786d7b487188970f4b4169cc055784e21eb71d410cc5
+	
+	# Server or server pool from which to fetch updates.  You can change
+	# this to point at a specific server if you want, but in most cases
+	# using a "nearby" server won't provide a measurable improvement in
+	# performance.
+	ServerName update.FreeBSD.org
+	
+	# Components of the base system which should be kept updated.
+	Components world
+	
+	# Example for updating the userland and the kernel source code only:
+	# Components src/base src/sys world
+	
+	# Paths which start with anything matching an entry in an IgnorePaths
+	# statement will be ignored.
+	IgnorePaths
+	
+	# Paths which start with anything matching an entry in an IDSIgnorePaths
+	# statement will be ignored by "freebsd-update IDS".
+	IDSIgnorePaths /usr/share/man/cat
+	IDSIgnorePaths /usr/share/man/whatis
+	IDSIgnorePaths /var/db/locate.database
+	IDSIgnorePaths /var/log
+	
+	# Paths which start with anything matching an entry in an UpdateIfUnmodified
+	# statement will only be updated if the contents of the file have not been
+	# modified by the user (unless changes are merged; see below).
+	UpdateIfUnmodified /etc/ /var/ /root/ /.cshrc /.profile
+	
+	# When upgrading to a new FreeBSD release, files which match MergeChanges
+	# will have any local changes merged into the version from the new release.
+	MergeChanges /etc/
+	
+	### Default configuration options:
+	
+	# Directory in which to store downloaded updates and temporary
+	# files used by FreeBSD Update.
+	# WorkDir /var/db/freebsd-update
+	
+	# Destination to send output of "freebsd-update cron" if an error
+	# occurs or updates have been downloaded.
+	# MailTo root
+	
+	# Is FreeBSD Update allowed to create new files?
+	# AllowAdd yes
+	
+	# Is FreeBSD Update allowed to delete files?
+	# AllowDelete yes
+	
+	# If the user has modified file ownership, permissions, or flags, should
+	# FreeBSD Update retain this modified metadata when installing a new version
+	# of that file?
+	# KeepModifiedMetadata yes
+	
+	# When upgrading between releases, should the list of Components be
+	# read strictly (StrictComponents yes) or merely as a list of components
+	# which *might* be installed of which FreeBSD Update should figure out
+	# which actually are installed and upgrade those (StrictComponents no)?
+	# StrictComponents no
+	
+	# When installing a new kernel perform a backup of the old one first
+	# so it is possible to boot the old kernel in case of problems.
+	# BackupKernel yes
+	
+	# If BackupKernel is enabled, the backup kernel is saved to this
+	# directory.
+	# BackupKernelDir /boot/kernel.old
+	
+	# When backing up a kernel also back up debug symbol files?
+	# BackupKernelSymbolFiles no
+	
+	# Create a new boot environment when installing patches
+	# CreateBootEnv yes
+	`
+)
+
+// Internal usage only
+func updateJail(jail *Jail) error {
+	
+	// Create default config as temporary file
+	cfgFile, err := os.CreateTemp("", "gocage-jail-update-")
+	if err != nil {
+		return err
+	}
+	
+	cfgFile.Write([]byte(fbsdUpdateConfig))
+	
+	defer cfgFile.Close()
+	//defer os.Remove(cfgFile.Name())
+	
+	cmd := fmt.Sprintf("/usr/sbin/freebsd-update --not-running-from-cron -f %s -b %s --currently-running %s fetch install", 
+					   cfgFile.Name(), jail.RootPath, jail.Config.Release)
+	
+	fmt.Printf("DEBUG: Prepare to execute \"%s\"\n", cmd)
+
+	err = executeCommandWithOutputToStdout(cmd)
+	if err != nil {
+		return err
+	}
+	
+	// Get and write new release into config.json
+	
+	
+	return nil
+}
+
+func UpdateJail(args []string) {
+	// Current jail were stopping
+	var cj *Jail
+	var err error
+
+	for _, a := range args {
+		// Check if jail exist and is distinctly named
+		cj, err = getJailFromArray(a, gJails)
+		if err != nil {
+			fmt.Printf("Error getting jail: %s\n", err)
+			continue
+		}
+		
+		fmt.Printf("  > Snapshot jail %s\n", cj.Name)
+		// Set snapshot name
+		dt := time.Now()
+		curDate := fmt.Sprintf("%s", dt.Format("2006-01-02_15-04-05"))
+		gSnapshotName = fmt.Sprintf("goc_update_%s_%s", cj.Config.Release, curDate)
+		err := createJailSnapshot(*cj)
+		if err != nil {
+			fmt.Printf("  > Snapshot jail %s: ERROR: %s\n", cj.Name, err.Error())
+			return
+		}
+		fmt.Printf("  > Snapshot jail %s: OK\n", cj.Name)
+		
+		fmt.Printf("  > Update jail %s\n", cj.Name)
+		err = updateJail(cj)
+		if err != nil {
+			fmt.Printf("ERROR: %s\n", err.Error())
+		} else {
+			fmt.Printf("  > Update jail %s: OK\n", cj.Name)
+		}
+	}
+}

go.mod

@@ -3,8 +3,13 @@ module gocage
 go 1.17
 
 require (
+	github.com/c-robinson/iplib v1.0.3
+	github.com/c2h5oh/datasize v0.0.0-20220606134207-859f65c6625b
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
+	github.com/sirupsen/logrus v1.8.1
 	github.com/spf13/cobra v1.2.1
 	github.com/spf13/viper v1.9.0
+	golang.org/x/net v0.0.0-20210503060351-7fd8e65b6420
 )
 
 require (

gocage.conf.yml

@@ -1,11 +1,12 @@
-# List datastore root directory (the one containing jails/ and defaults.json)
+# List datastore(s) root directory (the one containing jails/ and defaults.json)
 datastore:
     - /iocage
 
+# Prefix all commands with sudo
 sudo: false
 
 # Columns to display when "gocage list". Column names are struct fields, see cmd/struct.go
 outcol: 'JID,Name,Config.Release,Config.Ip4_addr,Running'
 
-# Do not add line separator between jails
+# Do not add line separator between jails
 nolinesep: false

jail/main.go

@@ -14,16 +14,17 @@ package jail
 */
 import "C"
 import (
-	"strconv"
+    "strconv"
 //    "syscall"
     "unsafe"
 )
 
 
 type Jail struct {
-    Name	string
-    Jid		int
-	Path	string
+    Name          string
+    Jid           int
+    Path          string
+    Devfs_ruleset int
 }
 
 
@@ -33,8 +34,8 @@ func GetJails() ([]Jail, error) {
     var jl Jail
     var err error
 
-	// Make "params" a list of 4 jails parameters
-    params := make([]C.struct_jailparam, 4)
+	// Make "params" a list of 5 jails parameters
+    params := make([]C.struct_jailparam, 5)
 
     // initialize parameter names
     csname := C.CString("name")
@@ -43,27 +44,31 @@ func GetJails() ([]Jail, error) {
     defer C.free(unsafe.Pointer(csjid))
     cspath := C.CString("path")
     defer C.free(unsafe.Pointer(cspath))
+	csdevfsrs := C.CString("devfs_ruleset")
+	defer C.free(unsafe.Pointer(csdevfsrs))
     cslastjid := C.CString("lastjid")
     defer C.free(unsafe.Pointer(cslastjid))
 	
+
     // initialize params struct with parameter names
     C.jailparam_init(&params[0], csname)
     C.jailparam_init(&params[1], csjid)
     C.jailparam_init(&params[2], cspath)
+	C.jailparam_init(&params[3], csdevfsrs)
 
     // The key to retrieve jail. lastjid = 0 returns first jail and its jid as jailparam_get return value
-    C.jailparam_init(&params[3], cslastjid)
+    C.jailparam_init(&params[4], cslastjid)
 
     lastjailid := 0
     cslastjidval := C.CString(strconv.Itoa(lastjailid))
     defer C.free(unsafe.Pointer(cslastjidval))
 
-    C.jailparam_import(&params[3], cslastjidval)
+    C.jailparam_import(&params[4], cslastjidval)
 
     // loop on existing jails
     for lastjailid >= 0 {
         // get parameter values
-        lastjailid = int(C.jailparam_get(&params[0], 4, 0))
+        lastjailid = int(C.jailparam_get(&params[0], 5, 0))
         if lastjailid > 0 {
             nametmp := C.jailparam_export(&params[0])
             jl.Name = C.GoString(nametmp)
@@ -75,23 +80,28 @@ func GetJails() ([]Jail, error) {
             // Memory mgmt : Non gere par Go
             C.free(unsafe.Pointer(jidtmp))
             
-			pathtmp := C.jailparam_export(&params[2])
+            pathtmp := C.jailparam_export(&params[2])
             jl.Path = C.GoString(pathtmp)
             // Memory mgmt : Non gere par Go
             C.free(unsafe.Pointer(pathtmp))
 
+            drstmp := C.jailparam_export(&params[3])
+            jl.Devfs_ruleset, _ = strconv.Atoi(C.GoString(drstmp))
+            // Memory mgmt : Non gere par Go
+            C.free(unsafe.Pointer(drstmp))
+
             jls = append(jls, jl)
             //log.Debug("Got jid " + strconv.Itoa(jl.jid) + " with name " + jl.name)
 
             // Prepare next loop iteration
             cslastjidval := C.CString(strconv.Itoa(lastjailid))
             defer C.free(unsafe.Pointer(cslastjidval))
-            C.jailparam_import(&params[3], cslastjidval)
+            C.jailparam_import(&params[4], cslastjidval)
         }
     }
 
-	// Free 4 items of params list
-    C.jailparam_free(&params[0], 4)
+	// Free 5 items of params list
+    C.jailparam_free(&params[0], 5)
 
     return jls, err
 }

main.go

@@ -1,10 +1,9 @@
 package main
 
 import (
-    "gocage/cmd"
+	"gocage/cmd"
 )
 
-func main () {
-    cmd.Execute()
+func main() {
+	cmd.Execute()
 }
-

service/gocage

@@ -0,0 +1,43 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# PROVIDE: gocage
+# REQUIRE: LOGIN cleanvar
+# KEYWORD: shutdown
+
+# Add the following lines to /etc/rc.conf to enable :
+#
+# gocage_enable="YES"
+#
+# gocage_conf="/usr/local/etc/gocage.conf.yml"
+#
+
+. /etc/rc.subr
+
+name="gocage"
+rcvar=gocage_enable
+
+# read configuration and set defaults
+load_rc_config "$name"
+
+: ${gocage_enable:="NO"}
+: ${gocage_conf="/usr/local/etc/gocage.conf.yml"}
+
+start_cmd=${name}_start
+stop_cmd=${name}_stop
+
+gocage_start()
+{
+    echo "Gocage starting jails... "
+    /usr/local/bin/gocage -c ${gocage_conf} start
+}
+
+gocage_stop()
+{
+    echo "Gocage stopping jails... "
+    /usr/local/bin/gocage  -c ${gocage_conf} stop
+}
+
+run_rc_command "$1"