feat: add migrate database from a source to a target databse

2024-08-29 21:49:35 +02:00
parent 99ae6a5b9d
commit 00ca15e94f
13 changed files with 298 additions and 121 deletions
--- a/cmd/backup.go
+++ b/cmd/backup.go
@@ -21,6 +21,8 @@ var BackupCmd = &cobra.Command{

 func init() {
 	//Backup
+	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().BoolP("prune", "", false, "Delete old backup, default disabled")
--- a/cmd/migrate.go
+++ b/cmd/migrate.go
@@ -0,0 +1,21 @@
+package cmd
+
+import (
+	"github.com/jkaninda/pg-bkup/pkg"
+	"github.com/jkaninda/pg-bkup/utils"
+	"github.com/spf13/cobra"
+)
+
+var MigrateCmd = &cobra.Command{
+	Use:   "migrate",
+	Short: "Migrate database from a source database to a target database",
+	Run: func(cmd *cobra.Command, args []string) {
+		if len(args) == 0 {
+			pkg.StartMigration(cmd)
+		} else {
+			utils.Fatal("Error, no argument required")
+
+		}
+
+	},
+}
--- a/cmd/restore.go
+++ b/cmd/restore.go
@@ -24,5 +24,7 @@ var RestoreCmd = &cobra.Command{
 func init() {
 	//Restore
 	RestoreCmd.PersistentFlags().StringP("file", "f", "", "File name of database")
+	RestoreCmd.PersistentFlags().StringP("storage", "s", "local", "Storage. local or s3")
+	RestoreCmd.PersistentFlags().StringP("path", "P", "", "AWS S3 path without file name. eg: /custom_path or ssh remote path `/home/foo/backup`")

 }
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -18,7 +18,6 @@ var rootCmd = &cobra.Command{
 	Example: utils.MainExample,
 	Version: appVersion,
 }
-var operation = ""

 // Execute adds all child commands to the root command and sets flags appropriately.
 // This is called by main.main(). It only needs to happen once to the rootCmd.
@@ -30,12 +29,10 @@ func Execute() {
 }

 func init() {
-	rootCmd.PersistentFlags().StringP("storage", "s", "local", "Storage. local or s3")
-	rootCmd.PersistentFlags().StringP("path", "P", "", "AWS S3 path without file name. eg: /custom_path or ssh remote path `/home/foo/backup`")
 	rootCmd.PersistentFlags().StringP("dbname", "d", "", "Database name")
 	rootCmd.PersistentFlags().IntP("port", "p", 5432, "Database port")
-	rootCmd.PersistentFlags().StringVarP(&operation, "operation", "o", "", "Set operation, for old version only")
 	rootCmd.AddCommand(VersionCmd)
 	rootCmd.AddCommand(BackupCmd)
 	rootCmd.AddCommand(RestoreCmd)
+	rootCmd.AddCommand(MigrateCmd)
 }
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -14,7 +14,7 @@ ENV DB_HOST=""
 ENV DB_NAME=""
 ENV DB_USERNAME=""
 ENV DB_PASSWORD=""
-ENV DB_PORT="5432"
+ENV DB_PORT=5432
 ENV STORAGE=local
 ENV AWS_S3_ENDPOINT=""
 ENV AWS_S3_BUCKET_NAME=""
@@ -30,8 +30,13 @@ ENV SSH_PASSWORD=""
 ENV SSH_HOST_NAME=""
 ENV SSH_IDENTIFY_FILE=""
 ENV SSH_PORT="22"
+ENV SOURCE_DB_HOST=""
+ENV SOURCE_DB_PORT=5432
+ENV SOURCE_DB_NAME=""
+ENV SOURCE_DB_USERNAME=""
+ENV SOURCE_DB_PASSWORD=""
 ARG DEBIAN_FRONTEND=noninteractive
-ENV VERSION="v1.2.2"
+ENV VERSION="v1.2.3"
 ENV BACKUP_CRON_EXPRESSION=""
 ENV GNUPGHOME="/tmp/gnupg"
 ARG WORKDIR="/app"
--- a/docs/how-tos/migrate.md
+++ b/docs/how-tos/migrate.md
@@ -0,0 +1,75 @@
+---
+title: Migrate database
+layout: default
+parent: How Tos
+nav_order: 9
+---
+
+# Migrate database
+
+To migrate the database, you need to add `migrate` command.
+
+{: .note }
+The pg backup has another great feature: migrating your database from a source database to another.
+
+As you know, to restore a database from a source to a target database, you need 2 operations: to start by backing up the source database and then restoring the source backed database to the target database.
+Instead of proceeding like that, you can use the integrated feature `(migrate)` that will help you to migrate your database by doing only one operation.
+
+
+### Docker compose
+```yml
+services:
+  pg-bkup:
+    # In production, it is advised to lock your image tag to a proper
+    # release version instead of using `latest`.
+    # Check https://github.com/jkaninda/pg-bkup/releases
+    # for a list of available releases.
+    image: jkaninda/pg-bkup
+    container_name: pg-bkup
+    command: migrate
+    volumes:
+      - ./backup:/backup
+    environment:
+      ## Target database
+      - DB_PORT=5432
+      - DB_HOST=postgres
+      - DB_NAME=database
+      - DB_USERNAME=username
+      - DB_PASSWORD=password
+      ## Source database
+      - SOURCE_DB_HOST=postgres
+      - SOURCE_DB_PORT=5432
+      - SOURCE_DB_NAME=sourcedb
+      - SOURCE_DB_USERNAME=jonas
+      - SOURCE_DB_PASSWORD=password
+    # pg-bkup container must be connected to the same network with your database
+    networks:
+      - web
+networks:
+  web:
+```
+
+### Migrate database using Docker CLI
+
+```env
+## Target database
+DB_PORT=5432
+DB_HOST=postgres
+DB_NAME=targetdb
+DB_USERNAME=targetuser
+DB_PASSWORD=password
+
+## Source database
+SOURCE_DB_HOST=postgres
+SOURCE_DB_PORT=5432
+SOURCE_DB_NAME=sourcedb
+SOURCE_DB_USERNAME=sourceuser
+SOURCE_DB_PASSWORD=password
+```
+
+```shell
+ docker run --rm --network your_network_name \
+ --env-file your-env
+ -v $PWD/backup:/backup/ \
+ jkaninda/pg-bkup migrate -d database_name
+```
--- a/pkg/backup.go
+++ b/pkg/backup.go
@@ -17,11 +17,10 @@ import (
 )

 func StartBackup(cmd *cobra.Command) {
-	_, _ = cmd.Flags().GetString("operation")
 	//Set env
 	utils.SetEnv("STORAGE_PATH", storagePath)
-	utils.GetEnv(cmd, "dbname", "DB_NAME")
-	utils.GetEnv(cmd, "port", "DB_PORT")
+	//utils.GetEnv(cmd, "dbname", "DB_NAME")
+	//utils.GetEnv(cmd, "port", "DB_PORT")
 	utils.GetEnv(cmd, "period", "BACKUP_CRON_EXPRESSION")

 	//Get flag value and set env
@@ -32,37 +31,38 @@ func StartBackup(cmd *cobra.Command) {
 	prune, _ := cmd.Flags().GetBool("prune")
 	disableCompression, _ = cmd.Flags().GetBool("disable-compression")
 	executionMode, _ = cmd.Flags().GetString("mode")
-	dbName = os.Getenv("DB_NAME")
 	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", dbName, time.Now().Format("20060102_150405"))
+	backupFileName := fmt.Sprintf("%s_%s.sql.gz", dbConf.dbName, time.Now().Format("20060102_150405"))
 	if disableCompression {
-		backupFileName = fmt.Sprintf("%s_%s.sql", dbName, time.Now().Format("20060102_150405"))
+		backupFileName = fmt.Sprintf("%s_%s.sql", dbConf.dbName, time.Now().Format("20060102_150405"))
 	}

 	if executionMode == "default" {
 		switch storage {
 		case "s3":
-			s3Backup(backupFileName, disableCompression, prune, backupRetention, encryption)
+			s3Backup(dbConf, backupFileName, disableCompression, prune, backupRetention, encryption)
 		case "local":
-			localBackup(backupFileName, disableCompression, prune, backupRetention, encryption)
+			localBackup(dbConf, backupFileName, disableCompression, prune, backupRetention, encryption)
 		case "ssh", "remote":
-			sshBackup(backupFileName, remotePath, disableCompression, prune, backupRetention, encryption)
+			sshBackup(dbConf, backupFileName, remotePath, disableCompression, prune, backupRetention, encryption)
 		case "ftp":
 			utils.Fatal("Not supported storage type: %s", storage)
 		default:
-			localBackup(backupFileName, disableCompression, prune, backupRetention, encryption)
+			localBackup(dbConf, backupFileName, disableCompression, prune, backupRetention, encryption)
 		}

 	} else if executionMode == "scheduled" {
-		scheduledMode(storage)
+		scheduledMode(dbConf, storage)
 	} else {
 		utils.Fatal("Error, unknown execution mode!")
 	}
@@ -70,7 +70,7 @@ func StartBackup(cmd *cobra.Command) {
 }

 // Run in scheduled mode
-func scheduledMode(storage string) {
+func scheduledMode(db *dbConfig, storage string) {

 	fmt.Println()
 	fmt.Println("**********************************")
@@ -81,7 +81,7 @@ func scheduledMode(storage string) {
 	utils.Info("Storage type %s ", storage)

 	//Test database connexion
-	utils.TestDatabaseConnection()
+	testDatabaseConnection(db)

 	utils.Info("Creating backup job...")
 	CreateCrontabScript(disableCompression, storage)
@@ -120,27 +120,17 @@ func scheduledMode(storage string) {
 }

 // BackupDatabase backup database
-func BackupDatabase(backupFileName string, disableCompression bool) {
-	dbHost = os.Getenv("DB_HOST")
-	dbPassword = os.Getenv("DB_PASSWORD")
-	dbUserName = os.Getenv("DB_USERNAME")
-	dbName = os.Getenv("DB_NAME")
-	dbPort = os.Getenv("DB_PORT")
+func BackupDatabase(db *dbConfig, backupFileName string, disableCompression bool) {
+
 	storagePath = os.Getenv("STORAGE_PATH")

 	utils.Info("Starting database backup...")

-	err := utils.CheckEnvVars(dbHVars)
-	if err != nil {
-		utils.Error("Please make sure all required environment variables for database are set")
-		utils.Fatal("Error checking environment variables: %s", err)
-	}
-
-	err = os.Setenv("PGPASSWORD", dbPassword)
+	err := os.Setenv("PGPASSWORD", db.dbPassword)
 	if err != nil {
 		return
 	}
-	utils.TestDatabaseConnection()
+	testDatabaseConnection(db)
 	// Backup Database database
 	utils.Info("Backing up database...")

@@ -148,10 +138,10 @@ func BackupDatabase(backupFileName string, disableCompression bool) {
 	if disableCompression {
 		// Execute pg_dump
 		cmd := exec.Command("pg_dump",
-			"-h", dbHost,
-			"-p", dbPort,
-			"-U", dbUserName,
-			"-d", dbName,
+			"-h", db.dbHost,
+			"-p", db.dbPort,
+			"-U", db.dbUserName,
+			"-d", db.dbName,
 		)
 		output, err := cmd.Output()
 		if err != nil {
@@ -172,10 +162,10 @@ func BackupDatabase(backupFileName string, disableCompression bool) {
 	} else {
 		// Execute pg_dump
 		cmd := exec.Command("pg_dump",
-			"-h", dbHost,
-			"-p", dbPort,
-			"-U", dbUserName,
-			"-d", dbName,
+			"-h", db.dbHost,
+			"-p", db.dbPort,
+			"-U", db.dbUserName,
+			"-d", db.dbName,
 		)
 		stdout, err := cmd.StdoutPipe()
 		if err != nil {
@@ -200,9 +190,9 @@ func BackupDatabase(backupFileName string, disableCompression bool) {
 	utils.Info("Database has been backed up")

 }
-func localBackup(backupFileName string, disableCompression bool, prune bool, backupRetention int, encrypt bool) {
+func localBackup(db *dbConfig, backupFileName string, disableCompression bool, prune bool, backupRetention int, encrypt bool) {
 	utils.Info("Backup database to local storage")
-	BackupDatabase(backupFileName, disableCompression)
+	BackupDatabase(db, backupFileName, disableCompression)
 	finalFileName := backupFileName
 	if encrypt {
 		encryptBackup(backupFileName)
@@ -218,12 +208,12 @@ func localBackup(backupFileName string, disableCompression bool, prune bool, bac
 	deleteTemp()
 }

-func s3Backup(backupFileName string, disableCompression bool, prune bool, backupRetention int, encrypt bool) {
+func s3Backup(db *dbConfig, backupFileName string, disableCompression bool, prune bool, backupRetention int, encrypt bool) {
 	bucket := utils.GetEnvVariable("AWS_S3_BUCKET_NAME", "BUCKET_NAME")
 	s3Path := utils.GetEnvVariable("AWS_S3_PATH", "S3_PATH")
 	utils.Info("Backup database to s3 storage")
 	//Backup database
-	BackupDatabase(backupFileName, disableCompression)
+	BackupDatabase(db, backupFileName, disableCompression)
 	finalFileName := backupFileName
 	if encrypt {
 		encryptBackup(backupFileName)
@@ -255,10 +245,10 @@ func s3Backup(backupFileName string, disableCompression bool, prune bool, backup
 	//Delete temp
 	deleteTemp()
 }
-func sshBackup(backupFileName, remotePath string, disableCompression bool, prune bool, backupRetention int, encrypt bool) {
+func sshBackup(db *dbConfig, backupFileName, remotePath string, disableCompression bool, prune bool, backupRetention int, encrypt bool) {
 	utils.Info("Backup database to Remote server")
 	//Backup database
-	BackupDatabase(backupFileName, disableCompression)
+	BackupDatabase(db, backupFileName, disableCompression)
 	finalFileName := backupFileName
 	if encrypt {
 		encryptBackup(backupFileName)
--- a/pkg/config.go
+++ b/pkg/config.go
@@ -1,4 +1,59 @@
 package pkg

+import (
+	"github.com/jkaninda/pg-bkup/utils"
+	"github.com/spf13/cobra"
+	"os"
+)
+
 type Config struct {
 }
+
+type dbConfig struct {
+	dbHost     string
+	dbPort     string
+	dbName     string
+	dbUserName string
+	dbPassword string
+}
+type dbSourceConfig struct {
+	sourceDbHost     string
+	sourceDbPort     string
+	sourceDbUserName string
+	sourceDbPassword string
+	sourceDbName     string
+}
+
+func getDbConfig(cmd *cobra.Command) *dbConfig {
+	//Set env
+	utils.GetEnv(cmd, "dbname", "DB_NAME")
+	utils.GetEnv(cmd, "port", "DB_PORT")
+	dConf := dbConfig{}
+	dConf.dbHost = os.Getenv("DB_HOST")
+	dConf.dbPort = os.Getenv("DB_PORT")
+	dConf.dbName = os.Getenv("DB_NAME")
+	dConf.dbUserName = os.Getenv("DB_USERNAME")
+	dConf.dbPassword = os.Getenv("DB_PASSWORD")
+
+	err := utils.CheckEnvVars(dbHVars)
+	if err != nil {
+		utils.Error("Please make sure all required environment variables for database are set")
+		utils.Fatal("Error checking environment variables: %s", err)
+	}
+	return &dConf
+}
+func getSourceDbConfig() *dbSourceConfig {
+	sdbConfig := dbSourceConfig{}
+	sdbConfig.sourceDbHost = os.Getenv("SOURCE_DB_HOST")
+	sdbConfig.sourceDbPort = os.Getenv("SOURCE_DB_PORT")
+	sdbConfig.sourceDbName = os.Getenv("SOURCE_DB_NAME")
+	sdbConfig.sourceDbUserName = os.Getenv("SOURCE_DB_USERNAME")
+	sdbConfig.sourceDbPassword = os.Getenv("SOURCE_DB_PASSWORD")
+
+	err := utils.CheckEnvVars(sdbRVars)
+	if err != nil {
+		utils.Error("Please make sure all required environment variables for source database are set")
+		utils.Fatal("Error checking environment variables: %s", err)
+	}
+	return &sdbConfig
+}
--- a/pkg/helper.go
+++ b/pkg/helper.go
@@ -1,8 +1,10 @@
 package pkg

 import (
+	"bytes"
 	"github.com/jkaninda/pg-bkup/utils"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"time"
 )
@@ -94,3 +96,38 @@ func deleteTemp() {
 		utils.Info("Deleting %s ... done", tmpPath)
 	}
 }
+
+// TestDatabaseConnection  tests the database connection
+func testDatabaseConnection(db *dbConfig) {
+
+	utils.Info("Connecting to %s database ...", db.dbName)
+	// Test database connection
+	query := "SELECT version();"
+
+	// Set the environment variable for the database password
+	err := os.Setenv("PGPASSWORD", db.dbPassword)
+	if err != nil {
+		return
+	}
+	// Prepare the psql command
+	cmd := exec.Command("psql",
+		"-U", db.dbUserName, // database user
+		"-d", db.dbName, // database name
+		"-h", db.dbHost, // host
+		"-p", db.dbPort, // port
+		"-c", query, // SQL command to execute
+	)
+	// Capture the output
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	cmd.Stderr = &out
+
+	// Run the command and capture any errors
+	err = cmd.Run()
+	if err != nil {
+		utils.Error("Error running psql command: %v\nOutput: %s\n", err, out.String())
+		return
+	}
+	utils.Info("Successfully connected to %s database", db.dbName)
+
+}
--- a/pkg/migrate.go
+++ b/pkg/migrate.go
@@ -0,0 +1,31 @@
+package pkg
+
+import (
+	"fmt"
+	"github.com/jkaninda/pg-bkup/utils"
+	"github.com/spf13/cobra"
+	"time"
+)
+
+func StartMigration(cmd *cobra.Command) {
+	utils.Info("Starting database migration...")
+	//Get DB config
+	dbConf = getDbConfig(cmd)
+	sDbConf = getSourceDbConfig()
+
+	//Generate file name
+	backupFileName := fmt.Sprintf("%s_%s.sql", sDbConf.sourceDbName, time.Now().Format("20060102_150405"))
+	//Backup Source Database
+	newDbConfig := dbConfig{}
+	newDbConfig.dbHost = sDbConf.sourceDbHost
+	newDbConfig.dbPort = sDbConf.sourceDbPort
+	newDbConfig.dbName = sDbConf.sourceDbName
+	newDbConfig.dbUserName = sDbConf.sourceDbUserName
+	newDbConfig.dbPassword = sDbConf.sourceDbPassword
+	BackupDatabase(&newDbConfig, backupFileName, true)
+	//Restore source database into target database
+	utils.Info("Restoring [%s] database into [%s] database...", sDbConf.sourceDbName, dbConf.dbName)
+	RestoreDatabase(dbConf, backupFileName)
+	utils.Info("[%s] database has been restored into [%s] database", sDbConf.sourceDbName, dbConf.dbName)
+	utils.Info("Database migration completed!")
+}
--- a/pkg/restore.go
+++ b/pkg/restore.go
@@ -13,8 +13,6 @@ func StartRestore(cmd *cobra.Command) {

 	//Set env
 	utils.SetEnv("STORAGE_PATH", storagePath)
-	utils.GetEnv(cmd, "dbname", "DB_NAME")
-	utils.GetEnv(cmd, "port", "DB_PORT")

 	//Get flag value and set env
 	s3Path := utils.GetEnv(cmd, "path", "AWS_S3_PATH")
@@ -23,47 +21,46 @@ func StartRestore(cmd *cobra.Command) {
 	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 {
 	case "s3":
-		restoreFromS3(file, bucket, s3Path)
+		restoreFromS3(dbConf, file, bucket, s3Path)
 	case "local":
 		utils.Info("Restore database from local")
 		copyToTmp(storagePath, file)
-		RestoreDatabase(file)
+		RestoreDatabase(dbConf, file)
 	case "ssh":
-		restoreFromRemote(file, remotePath)
+		restoreFromRemote(dbConf, file, remotePath)
 	case "ftp":
 		utils.Fatal("Restore from FTP is not yet supported")
 	default:
 		utils.Info("Restore database from local")
-		RestoreDatabase(file)
+		copyToTmp(storagePath, file)
+		RestoreDatabase(dbConf, file)
 	}
 }

-func restoreFromS3(file, bucket, s3Path string) {
+func restoreFromS3(db *dbConfig, file, bucket, s3Path string) {
 	utils.Info("Restore database from s3")
 	err := utils.DownloadFile(tmpPath, file, bucket, s3Path)
 	if err != nil {
 		utils.Fatal("Error download file from s3 %s %v ", file, err)
 	}
-	RestoreDatabase(file)
+	RestoreDatabase(db, file)
 }
-func restoreFromRemote(file, remotePath string) {
+func restoreFromRemote(db *dbConfig, file, remotePath string) {
 	utils.Info("Restore database from remote server")
 	err := CopyFromRemote(file, remotePath)
 	if err != nil {
 		utils.Fatal("Error download file from remote server: %s %v", filepath.Join(remotePath, file), err)
 	}
-	RestoreDatabase(file)
+	RestoreDatabase(db, file)
 }

 // RestoreDatabase restore database
-func RestoreDatabase(file string) {
-	dbHost = os.Getenv("DB_HOST")
-	dbPassword = os.Getenv("DB_PASSWORD")
-	dbUserName = os.Getenv("DB_USERNAME")
-	dbName = os.Getenv("DB_NAME")
-	dbPort = os.Getenv("DB_PORT")
+func RestoreDatabase(db *dbConfig, file string) {
 	gpgPassphrase := os.Getenv("GPG_PASSPHRASE")
 	if file == "" {
 		utils.Fatal("Error, file required")
@@ -93,17 +90,17 @@ func RestoreDatabase(file string) {

 	if utils.FileExists(fmt.Sprintf("%s/%s", tmpPath, file)) {

-		err := os.Setenv("PGPASSWORD", dbPassword)
+		err := os.Setenv("PGPASSWORD", db.dbPassword)
 		if err != nil {
 			return
 		}
-		utils.TestDatabaseConnection()
+		testDatabaseConnection(db)
 		utils.Info("Restoring database...")

 		extension := filepath.Ext(fmt.Sprintf("%s/%s", tmpPath, file))
 		// Restore from compressed file / .sql.gz
 		if extension == ".gz" {
-			str := "zcat " + fmt.Sprintf("%s/%s", tmpPath, file) + " | psql -h " + os.Getenv("DB_HOST") + " -p " + os.Getenv("DB_PORT") + " -U " + os.Getenv("DB_USERNAME") + " -v -d " + os.Getenv("DB_NAME")
+			str := "zcat " + fmt.Sprintf("%s/%s", tmpPath, file) + " | psql -h " + db.dbHost + " -p " + db.dbPort + " -U " + db.dbUserName + " -v -d " + db.dbName
 			_, err := exec.Command("bash", "-c", str).Output()
 			if err != nil {
 				utils.Fatal("Error, in restoring the database %v", err)
@@ -115,7 +112,7 @@ func RestoreDatabase(file string) {

 		} else if extension == ".sql" {
 			//Restore from sql file
-			str := "cat " + fmt.Sprintf("%s/%s", tmpPath, file) + " | psql -h " + os.Getenv("DB_HOST") + " -p " + os.Getenv("DB_PORT") + " -U " + os.Getenv("DB_USERNAME") + " -v -d " + os.Getenv("DB_NAME")
+			str := "cat " + fmt.Sprintf("%s/%s", tmpPath, file) + " | psql -h " + db.dbHost + " -p " + db.dbPort + " -U " + db.dbUserName + " -v -d " + db.dbName
 			_, err := exec.Command("bash", "-c", str).Output()
 			if err != nil {
 				utils.Fatal("Error in restoring the database %v", err)
--- a/pkg/var.go
+++ b/pkg/var.go
@@ -7,13 +7,13 @@ const algorithm = "aes256"
 const gpgExtension = "gpg"

 var (
-	storage            = "local"
-	file               = ""
-	dbPassword         = ""
-	dbUserName         = ""
-	dbName             = ""
-	dbHost             = ""
-	dbPort             = "5432"
+	storage = "local"
+	file    = ""
+	//dbPassword         = ""
+	//dbUserName         = ""
+	//dbName             = ""
+	//dbHost             = ""
+	//dbPort             = "5432"
 	executionMode      = "default"
 	storagePath        = "/backup"
 	disableCompression = false
@@ -27,6 +27,16 @@ var dbHVars = []string{
 	"DB_USERNAME",
 	"DB_NAME",
 }
+var sdbRVars = []string{
+	"SOURCE_DB_HOST",
+	"SOURCE_DB_PORT",
+	"SOURCE_DB_NAME",
+	"SOURCE_DB_USERNAME",
+	"SOURCE_DB_PASSWORD",
+}
+
+var dbConf *dbConfig
+var sDbConf *dbSourceConfig

 // sshVars Required environment variables for SSH remote server storage
 var sshVars = []string{
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -1,19 +1,17 @@
 package utils

 /*****
-*   MySQL Backup & Restore
+*   PostgreSQL Backup & Restore
 * @author    Jonas Kaninda
 * @license   MIT License <https://opensource.org/licenses/MIT>
-* @link      https://github.com/jkaninda/mysql-bkup
+* @link      https://github.com/jkaninda/pg-bkup
 **/
 import (
-	"bytes"
 	"fmt"
 	"github.com/spf13/cobra"
 	"io"
 	"io/fs"
 	"os"
-	"os/exec"
 )

 func FileExists(filename string) bool {
@@ -90,49 +88,6 @@ func IsDirEmpty(name string) (bool, error) {
 	return true, nil
 }

-// TestDatabaseConnection  tests the database connection
-func TestDatabaseConnection() {
-	dbHost := os.Getenv("DB_HOST")
-	dbPassword := os.Getenv("DB_PASSWORD")
-	dbUserName := os.Getenv("DB_USERNAME")
-	dbName := os.Getenv("DB_NAME")
-	dbPort := os.Getenv("DB_PORT")
-
-	if os.Getenv("DB_HOST") == "" || os.Getenv("DB_NAME") == "" || os.Getenv("DB_USERNAME") == "" || os.Getenv("DB_PASSWORD") == "" {
-		Fatal("Please make sure all required database environment variables are set")
-	} else {
-		Info("Connecting to database ...")
-		// Test database connection
-		query := "SELECT version();"
-
-		// Set the environment variable for the database password
-		err := os.Setenv("PGPASSWORD", dbPassword)
-		if err != nil {
-			return
-		}
-		// Prepare the psql command
-		cmd := exec.Command("psql",
-			"-U", dbUserName, // database user
-			"-d", dbName, // database name
-			"-h", dbHost, // host
-			"-p", dbPort, // port
-			"-c", query, // SQL command to execute
-		)
-		// Capture the output
-		var out bytes.Buffer
-		cmd.Stdout = &out
-		cmd.Stderr = &out
-
-		// Run the command and capture any errors
-		err = cmd.Run()
-		if err != nil {
-			Error("Error running psql command: %v\nOutput: %s\n", err, out.String())
-			return
-		}
-		Info("Successfully connected to database")
-
-	}
-}
 func GetEnv(cmd *cobra.Command, flagName, envName string) string {
 	value, _ := cmd.Flags().GetString(flagName)
 	if value != "" {