chore: migrate backup scheduled mode from linux cron to go cron

cmd/backup.go

@@ -30,7 +30,8 @@ func init() {
 	BackupCmd.PersistentFlags().StringP("storage", "s", "local", "Storage. local or s3")
 	BackupCmd.PersistentFlags().StringP("path", "P", "", "AWS S3 path without file name. eg: /custom_path or ssh remote path `/home/foo/backup`")
 	BackupCmd.PersistentFlags().StringP("mode", "m", "default", "Execution mode. default or scheduled")
-	BackupCmd.PersistentFlags().StringP("period", "", "0 1 * * *", "Schedule period time")
+	BackupCmd.PersistentFlags().StringP("period", "", "", "Schedule period time | Deprecated")
+	BackupCmd.PersistentFlags().StringP("cron-expression", "", "", "Backup cron expression")
 	BackupCmd.PersistentFlags().BoolP("prune", "", false, "Delete old backup, default disabled")
 	BackupCmd.PersistentFlags().IntP("keep-last", "", 7, "Delete files created more than specified days ago, default 7 days")
 	BackupCmd.PersistentFlags().BoolP("disable-compression", "", false, "Disable backup compression")

docker/Dockerfile

@@ -36,7 +36,7 @@ ENV TARGET_DB_NAME=""
 ENV TARGET_DB_USERNAME=""
 ENV TARGET_DB_PASSWORD=""
 ARG DEBIAN_FRONTEND=noninteractive
-ENV VERSION="v1.2.5"
+ENV VERSION="v1.2.8"
 ENV BACKUP_CRON_EXPRESSION=""
 ENV TG_TOKEN=""
 ENV TG_CHAT_ID=""
@@ -50,7 +50,7 @@ LABEL author="Jonas Kaninda"
 
 RUN apt-get update -qq
 
-RUN apt install postgresql-client supervisor cron gnupg -y
+RUN apt install postgresql-client cron gnupg -y
 
 # Clear cache
 RUN apt-get clean && rm -rf /var/lib/apt/lists/*
@@ -71,7 +71,6 @@ RUN chmod +x /usr/local/bin/pg-bkup
 
 RUN ln -s /usr/local/bin/pg-bkup /usr/local/bin/bkup
 
-ADD docker/supervisord.conf /etc/supervisor/supervisord.conf
 # Create the backup script and make it executable
 RUN echo '#!/bin/sh\n/usr/local/bin/pg-bkup backup "$@"' > /usr/local/bin/backup && \
     chmod +x /usr/local/bin/backup

go.mod

@@ -12,9 +12,9 @@ require (
 	github.com/bramvdbogaerde/go-scp v1.5.0 // indirect
 	github.com/hpcloud/tail v1.0.0 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/robfig/cron/v3 v3.0.1 // indirect
 	golang.org/x/crypto v0.18.0 // indirect
 	golang.org/x/sys v0.22.0 // indirect
 	gopkg.in/fsnotify.v1 v1.4.7 // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
 )
-

go.sum

@@ -29,6 +29,8 @@ github.com/minio/md5-simd v1.1.2/go.mod h1:MzdKDxYpY2BT9XQFocsiZf/NKVtR7nkE4RoEp
 github.com/minio/minio-go/v7 v7.0.74 h1:fTo/XlPBTSpo3BAMshlwKL5RspXRv9us5UeHEGYCFe0=
 github.com/minio/minio-go/v7 v7.0.74/go.mod h1:qydcVzV8Hqtj1VtEocfxbmVFa2siu6HGa+LDEPogjD8=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
+github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 github.com/rs/xid v1.5.0 h1:mKX4bl4iPYJtEIxp6CYiUuLQ/8DYMoz0PUdtGgMFRVc=
 github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=

pkg/backup.go

@@ -8,8 +8,8 @@ package pkg
 
 import (
 	"fmt"
-	"github.com/hpcloud/tail"
 	"github.com/jkaninda/pg-bkup/utils"
+	"github.com/robfig/cron/v3"
 	"github.com/spf13/cobra"
 	"log"
 	"os"
@@ -20,104 +20,67 @@ import (
 
 func StartBackup(cmd *cobra.Command) {
 	intro()
-	//Set env
-	utils.SetEnv("STORAGE_PATH", storagePath)
-	utils.GetEnv(cmd, "period", "BACKUP_CRON_EXPRESSION")
+	dbConf = initDbConfig(cmd)
+	//Initialize backup configs
+	config := initBackupConfig(cmd)
 
-	//Get flag value and set env
-	remotePath := utils.GetEnv(cmd, "path", "SSH_REMOTE_PATH")
-	storage = utils.GetEnv(cmd, "storage", "STORAGE")
-	file = utils.GetEnv(cmd, "file", "FILE_NAME")
-	backupRetention, _ := cmd.Flags().GetInt("keep-last")
-	prune, _ := cmd.Flags().GetBool("prune")
-	disableCompression, _ = cmd.Flags().GetBool("disable-compression")
-	executionMode, _ = cmd.Flags().GetString("mode")
-	gpgPassphrase := os.Getenv("GPG_PASSPHRASE")
-	_ = utils.GetEnv(cmd, "path", "AWS_S3_PATH")
-
-	dbConf = getDbConfig(cmd)
-
-	//
-	if gpgPassphrase != "" {
-		encryption = true
-	}
-
-	//Generate file name
-	backupFileName := fmt.Sprintf("%s_%s.sql.gz", dbConf.dbName, time.Now().Format("20060102_150405"))
-	if disableCompression {
-		backupFileName = fmt.Sprintf("%s_%s.sql", dbConf.dbName, time.Now().Format("20060102_150405"))
-	}
-
-	if executionMode == "default" {
-		switch storage {
-		case "s3":
-			s3Backup(dbConf, backupFileName, disableCompression, prune, backupRetention, encryption)
-		case "local":
-			localBackup(dbConf, backupFileName, disableCompression, prune, backupRetention, encryption)
-		case "ssh", "remote":
-			sshBackup(dbConf, backupFileName, remotePath, disableCompression, prune, backupRetention, encryption)
-		case "ftp":
-			utils.Fatal("Not supported storage type: %s", storage)
-		default:
-			localBackup(dbConf, backupFileName, disableCompression, prune, backupRetention, encryption)
-		}
-
-	} else if executionMode == "scheduled" {
-		scheduledMode(dbConf, storage)
+	if config.cronExpression == "" {
+		BackupTask(dbConf, config)
 	} else {
-		utils.Fatal("Error, unknown execution mode!")
+		if utils.IsValidCronExpression(config.cronExpression) {
+			scheduledMode(dbConf, config)
+		} else {
+			utils.Fatal("Cron expression is not valid: %s", config.cronExpression)
+		}
 	}
 
 }
 
 // Run in scheduled mode
-func scheduledMode(db *dbConfig, storage string) {
-
-	fmt.Println()
-	fmt.Println("**********************************")
-	fmt.Println("     Starting PostgreSQL Bkup...   ")
-	fmt.Println("***********************************")
+func scheduledMode(db *dbConfig, config *BackupConfig) {
 	utils.Info("Running in Scheduled mode")
-	utils.Info("Execution period %s ", os.Getenv("BACKUP_CRON_EXPRESSION"))
-	utils.Info("Storage type %s ", storage)
+	utils.Info("Backup cron expression:  %s", config.cronExpression)
+	utils.Info("Storage type %s ", config.storage)
 
 	//Test database connexion
 	testDatabaseConnection(db)
 
-	utils.Info("Creating backup job...")
-	CreateCrontabScript(disableCompression, storage)
+	utils.Info("Creating cron job...")
+	// Create a new cron instance
+	c := cron.New()
 
-	supervisorConfig := "/etc/supervisor/supervisord.conf"
-
-	// Start Supervisor
-	cmd := exec.Command("supervisord", "-c", supervisorConfig)
-	err := cmd.Start()
+	_, err := c.AddFunc(config.cronExpression, func() {
+		BackupTask(db, config)
+	})
 	if err != nil {
-		utils.Fatal("Failed to start supervisord: %v", err)
+		return
 	}
-	utils.Info("Backup job started")
-
-	defer func() {
-		if err := cmd.Process.Kill(); err != nil {
-			utils.Info("Failed to kill supervisord process: %v", err)
-		} else {
-			utils.Info("Supervisor stopped.")
+	// Start the cron scheduler
+	c.Start()
+	utils.Info("Creating cron job...done")
+	defer c.Stop()
+	select {}
+}
+func BackupTask(db *dbConfig, config *BackupConfig) {
+	utils.Info("Starting backup task...")
+	//Generate file name
+	backupFileName := fmt.Sprintf("%s_%s.sql.gz", db.dbName, time.Now().Format("20240102_150405"))
+	if config.disableCompression {
+		backupFileName = fmt.Sprintf("%s_%s.sql", db.dbName, time.Now().Format("20240102_150405"))
 	}
-	}()
-
-	if _, err := os.Stat(cronLogFile); os.IsNotExist(err) {
-		utils.Fatal(fmt.Sprintf("Log file %s does not exist.", cronLogFile))
+	config.backupFileName = backupFileName
+	switch config.storage {
+	case "s3":
+		s3Backup(db, config.backupFileName, config.disableCompression, config.prune, config.backupRetention, config.encryption)
+	case "local":
+		localBackup(db, config.backupFileName, config.disableCompression, config.prune, config.backupRetention, config.encryption)
+	case "ssh", "remote":
+		sshBackup(db, config.backupFileName, config.remotePath, config.disableCompression, config.prune, config.backupRetention, config.encryption)
+	case "ftp":
+		utils.Fatal("Not supported storage type: %s", config.storage)
+	default:
+		localBackup(db, config.backupFileName, config.disableCompression, config.prune, config.backupRetention, config.encryption)
 	}
-	t, err := tail.TailFile(cronLogFile, tail.Config{Follow: true})
-	if err != nil {
-		utils.Fatal("Failed to tail file: %v", err)
-	}
-
-	// Read and print new lines from the log file
-	for line := range t.Lines {
-		fmt.Println(line.Text)
-	}
-
 }
 func intro() {
 	utils.Info("Starting PostgreSQL Backup...")

pkg/config.go

@@ -33,8 +33,19 @@ type TgConfig struct {
 	Token  string
 	ChatId string
 }
+type BackupConfig struct {
+	backupFileName     string
+	backupRetention    int
+	disableCompression bool
+	prune              bool
+	encryption         bool
+	remotePath         string
+	gpqPassphrase      string
+	storage            string
+	cronExpression     string
+}
 
-func getDbConfig(cmd *cobra.Command) *dbConfig {
+func initDbConfig(cmd *cobra.Command) *dbConfig {
 	//Set env
 	utils.GetEnv(cmd, "dbname", "DB_NAME")
 	dConf := dbConfig{}
@@ -51,7 +62,71 @@ func getDbConfig(cmd *cobra.Command) *dbConfig {
 	}
 	return &dConf
 }
-func getTargetDbConfig() *targetDbConfig {
+func initBackupConfig(cmd *cobra.Command) *BackupConfig {
+	utils.SetEnv("STORAGE_PATH", storagePath)
+	utils.GetEnv(cmd, "cron-expression", "BACKUP_CRON_EXPRESSION")
+	utils.GetEnv(cmd, "period", "BACKUP_CRON_EXPRESSION")
+
+	//Get flag value and set env
+	remotePath := utils.GetEnv(cmd, "path", "SSH_REMOTE_PATH")
+	storage = utils.GetEnv(cmd, "storage", "STORAGE")
+	backupRetention, _ := cmd.Flags().GetInt("keep-last")
+	prune, _ := cmd.Flags().GetBool("prune")
+	disableCompression, _ = cmd.Flags().GetBool("disable-compression")
+	executionMode, _ = cmd.Flags().GetString("mode")
+	gpqPassphrase := os.Getenv("GPG_PASSPHRASE")
+	_ = utils.GetEnv(cmd, "path", "AWS_S3_PATH")
+	cronExpression := os.Getenv("BACKUP_CRON_EXPRESSION")
+
+	if gpqPassphrase != "" {
+		encryption = true
+	}
+
+	//Initialize backup configs
+	config := BackupConfig{}
+	config.backupRetention = backupRetention
+	config.disableCompression = disableCompression
+	config.prune = prune
+	config.storage = storage
+	config.encryption = encryption
+	config.remotePath = remotePath
+	config.gpqPassphrase = gpqPassphrase
+	config.cronExpression = cronExpression
+	return &config
+}
+
+type RestoreConfig struct {
+	s3Path        string
+	remotePath    string
+	storage       string
+	file          string
+	bucket        string
+	gpqPassphrase string
+}
+
+func initRestoreConfig(cmd *cobra.Command) *RestoreConfig {
+	utils.SetEnv("STORAGE_PATH", storagePath)
+
+	//Get flag value and set env
+	s3Path := utils.GetEnv(cmd, "path", "AWS_S3_PATH")
+	remotePath := utils.GetEnv(cmd, "path", "SSH_REMOTE_PATH")
+	storage = utils.GetEnv(cmd, "storage", "STORAGE")
+	file = utils.GetEnv(cmd, "file", "FILE_NAME")
+	_, _ = cmd.Flags().GetString("mode")
+	bucket := utils.GetEnvVariable("AWS_S3_BUCKET_NAME", "BUCKET_NAME")
+	gpqPassphrase := os.Getenv("GPG_PASSPHRASE")
+	//Initialize restore configs
+	rConfig := RestoreConfig{}
+	rConfig.s3Path = s3Path
+	rConfig.remotePath = remotePath
+	rConfig.storage = storage
+	rConfig.bucket = bucket
+	rConfig.file = file
+	rConfig.storage = storage
+	rConfig.gpqPassphrase = gpqPassphrase
+	return &rConfig
+}
+func initTargetDbConfig() *targetDbConfig {
 	tdbConfig := targetDbConfig{}
 	tdbConfig.targetDbHost = os.Getenv("TARGET_DB_HOST")
 	tdbConfig.targetDbPort = os.Getenv("TARGET_DB_PORT")

pkg/migrate.go

@@ -17,8 +17,8 @@ func StartMigration(cmd *cobra.Command) {
 	intro()
 	utils.Info("Starting database migration...")
 	//Get DB config
-	dbConf = getDbConfig(cmd)
-	targetDbConf = getTargetDbConfig()
+	dbConf = initDbConfig(cmd)
+	targetDbConf = initTargetDbConfig()
 
 	//Defining the target database variables
 	newDbConfig := dbConfig{}

pkg/restore.go

@@ -17,34 +17,24 @@ import (
 
 func StartRestore(cmd *cobra.Command) {
 	intro()
-	//Set env
-	utils.SetEnv("STORAGE_PATH", storagePath)
+	dbConf = initDbConfig(cmd)
+	restoreConf := initRestoreConfig(cmd)
 
-	//Get flag value and set env
-	s3Path := utils.GetEnv(cmd, "path", "AWS_S3_PATH")
-	remotePath := utils.GetEnv(cmd, "path", "SSH_REMOTE_PATH")
-	storage = utils.GetEnv(cmd, "storage", "STORAGE")
-	file = utils.GetEnv(cmd, "file", "FILE_NAME")
-	executionMode, _ = cmd.Flags().GetString("mode")
-	bucket := utils.GetEnvVariable("AWS_S3_BUCKET_NAME", "BUCKET_NAME")
-
-	dbConf = getDbConfig(cmd)
-
-	switch storage {
+	switch restoreConf.storage {
 	case "s3":
-		restoreFromS3(dbConf, file, bucket, s3Path)
+		restoreFromS3(dbConf, restoreConf.file, restoreConf.bucket, restoreConf.s3Path)
 	case "local":
 		utils.Info("Restore database from local")
-		copyToTmp(storagePath, file)
-		RestoreDatabase(dbConf, file)
+		copyToTmp(storagePath, restoreConf.file)
+		RestoreDatabase(dbConf, restoreConf.file)
 	case "ssh":
-		restoreFromRemote(dbConf, file, remotePath)
+		restoreFromRemote(dbConf, restoreConf.file, restoreConf.remotePath)
 	case "ftp":
 		utils.Fatal("Restore from FTP is not yet supported")
 	default:
 		utils.Info("Restore database from local")
-		copyToTmp(storagePath, file)
-		RestoreDatabase(dbConf, file)
+		copyToTmp(storagePath, restoreConf.file)
+		RestoreDatabase(dbConf, restoreConf.file)
 	}
 }
 

utils/utils.go

@@ -10,6 +10,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"github.com/robfig/cron/v3"
 	"github.com/spf13/cobra"
 	"io"
 	"io/fs"
@@ -248,3 +249,7 @@ func getTgUrl() string {
 	return fmt.Sprintf("https://api.telegram.org/bot%s", os.Getenv("TG_TOKEN"))
 
 }
+func IsValidCronExpression(cronExpr string) bool {
+	_, err := cron.ParseStandard(cronExpr)
+	return err == nil
+}