Update TODO list with some bugs

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/list.go

@@ -272,6 +272,7 @@ func listJailsFromDirectory(dir string, dsname string) ([]Jail, error) {
 				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

cmd/root.go

@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	gVersion = "0.32a"
+	gVersion = "0.33a"
 	
 	// TODO : Get from $jail_zpool/defaults.json
 	MIN_DYN_DEVFS_RULESET = 1000
@@ -134,7 +134,7 @@ ex: gocage list srv-db srv-web`,
 			} else {
 				StartJail(args)
 			}
-			WriteConfigToDisk(false)
+			WriteConfigToDisk("", false, false)
 		},
 	}
 	
@@ -148,7 +148,7 @@ ex: gocage list srv-db srv-web`,
 			ListJails(args, false)
 			StopJail(args)
 			StartJail(args)
-			WriteConfigToDisk(false)
+			WriteConfigToDisk("", false, false)
 		},
 	}
 	
@@ -171,7 +171,7 @@ Multiples properties can be specified, separated with space (Ex: gocage set allo
 			// Load inventory
 			ListJails(args, false)
 			SetJailProperties(args)
-			WriteConfigToDisk(true)
+			WriteConfigToDisk("", true, false)
 		},
 	}
 
@@ -253,7 +253,7 @@ You can specify multiple jails.`,
 			// Load inventory
 			ListJails(args, false)
 			MigrateJail(args)
-			WriteConfigToDisk(false)
+			WriteConfigToDisk("", false, false)
 		},
 	}
 
@@ -303,6 +303,15 @@ You can specify multiple datastores.`,
 	 },
 	}
 	
+	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",
@@ -378,6 +387,7 @@ func init() {
 	rootCmd.AddCommand(migrateCmd)
 	rootCmd.AddCommand(datastoreCmd)
 	rootCmd.AddCommand(fetchCmd)
+	rootCmd.AddCommand(UpdateCmd)
 	
 	rootCmd.AddCommand(testCmd)
 	
@@ -461,59 +471,68 @@ func initConfig() {
 }
 
 /********************************************************************************
- * Write jails config which been updated to disk.
+ * 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(changeauto bool) {
+func WriteConfigToDisk(jailName string, changeauto bool, forceWrite bool) {
 	for _, j := range gJails {
-		if j.ConfigUpdated {
-			//log.Debug("%s config has changed, write changes to disk\n", j.Name)
+		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
+				// 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 changeauto == false {
+					// Overwrite "auto" properties
+					ondiskjc, err := getJailConfig(j.ConfigPath)
 					if err != nil {
 						panic(err)
 					}
-					if v.String() == "auto" {
-						err = setStructFieldValue(&jc, p, "auto")
+					// 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 {
-							fmt.Printf("ERROR sanitizing config: %s\n", err.Error())
-							os.Exit(1)
+							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(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)
+				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)

cmd/start.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"fmt"
 	"net"
+	"time"
 	"errors"
 	"regexp"
 	"reflect"
@@ -945,7 +946,7 @@ func setupVnetInterfaceJailSide(jail *Jail, hsepair string) error {
 		// Get bridge MTU
 		mtu, err := gJailHost.GetBridgeMTU(bridge)
 		if err != nil {
-			return fmt.Errorf("Error getting bridge mtu: %v\n", err)
+			return fmt.Errorf("Error getting bridge %s mtu: %v\n", bridge, err)
 		}
 				
 		cmd = fmt.Sprintf("/usr/sbin/jexec %d ifconfig %s mtu %d", jail.JID, jsepair, mtu)
@@ -1309,7 +1310,7 @@ func StartJail(args []string) {
 		}
 		
 		// Synchronize jail config to disk
-		WriteConfigToDisk(false)
+		WriteConfigToDisk(cj.Name, false, false)
 		
 		start_cmd := fmt.Sprintf("/usr/sbin/jail -f /var/run/jail.%s.conf -c", cj.InternalName)
 
@@ -1455,6 +1456,11 @@ func StartJail(args []string) {
 		// TODO: Handle dhcp
 		// TODO: Apply rctl
 		
+		// Update last_started
+		dt := time.Now()
+		curDate := fmt.Sprintf("%s", dt.Format("2006-01-02 15:04:05"))
+		fmt.Sprintf(cj.Config.Last_started, curDate)
+		WriteConfigToDisk(cj.Name, false, true)
 		
 		
 		/*

cmd/stop.go

@@ -236,6 +236,16 @@ func StopJail(args []string) {
 
 		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.ConfigUpdated = true
+
 		out, err := executeCommand(fmt.Sprintf("rctl jail:%s", cj.InternalName))
 		if err == nil && len(out) > 0 {
 			fmt.Printf("  > Remove RCTL rules:\n")
@@ -399,5 +409,8 @@ func StopJail(args []string) {
 				}
 			}
 		}
+
+		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)
+		}
+	}
+}

cmd/utils.go

@@ -225,6 +225,78 @@ func executeCommand(cmdline string) (string, error) {
 	return string(out), err
 }
 
+// Executed command outputs to stdout in realtime
+func executeCommandWithOutputToStdout(cmdline string) (error) {
+	var cmd []string
+	var err error
+
+	if gUseSudo {
+		cmd = append(cmd, "sudo")
+	}
+
+	var word string
+	var in_escaped bool
+	// Split by words, or " enclosed words
+	for i, c := range (cmdline) {
+		if string(c) == "\"" {
+			if in_escaped {
+				// This is the closing "
+				cmd = append(cmd, word)
+				in_escaped = false
+			} else {
+				in_escaped = true
+			}
+			continue
+		}
+		if string(c) == " " {
+			if in_escaped {
+				word = word + string(c)
+				continue
+			} else {
+				cmd = append(cmd, word)
+				word = ""
+				continue
+			}
+		}
+		if i == (len(cmdline) - 1) {
+			word = word + string(c)
+			cmd = append(cmd, word)
+			break
+		}
+
+		// else
+		word = word + string(c)
+	}
+
+	var execHandle *exec.Cmd
+	if len(cmd) > 1 {
+		execHandle = exec.Command(cmd[0], cmd[1:]...)
+	} else {
+		execHandle = exec.Command(cmd[0])
+	}
+	stdout, err := execHandle.StdoutPipe()
+	if err != nil {
+		return err
+	}
+
+	execHandle.Start()
+
+	buf := bufio.NewReader(stdout)
+	for {
+		line, _, err := buf.ReadLine()
+		if err != nil {
+			if err.Error() == "EOF" {
+				return nil
+			} else {
+				return err
+			}
+		}
+		fmt.Println(string(line))
+	}
+
+	return fmt.Errorf("Unknown error: you shouldn't be here!\n")
+}
+
 func executeCommandInJail(jail *Jail, cmdline string) (string, error) {
 	var cmd []string