Add parallelism

docs/DETAILS.md

@@ -142,6 +142,7 @@ types:
 - **`--password`**: SSH password
 - **`--key-file`**: SSH private key file path
 - **`--port`**: SSH port (default: `22`)
+- **`--parallel`**: Maximum number of devices to process in parallel (default: `10`)
 
 ### Examples
 
@@ -160,6 +161,9 @@ ipng-router-backup --yaml config.yaml --output-dir /backup/network
 
 # With password authentication
 ipng-router-backup --yaml config.yaml --password mypassword
+
+# Process more devices in parallel
+ipng-router-backup --yaml config.yaml --parallel 20
 ```
 
 ## SSH Authentication

docs/ipng-router-backup.1

@@ -35,6 +35,9 @@ SSH port number (default: 22)
 .BR --host " \fIHOSTNAME\fR"
 Specific host(s) or glob patterns to process (can be repeated, processes all if not specified)
 .TP
+.BR --parallel " \fINUMBER\fR"
+Maximum number of devices to process in parallel (default: 10)
+.TP
 .BR --help
 Show help message
 .SH CONFIGURATION
@@ -98,6 +101,11 @@ Process hosts matching patterns:
 .EX
 ipng-router-backup --yaml config.yaml --host "asw*" --host "*switch*"
 .EE
+.TP
+Process devices in parallel:
+.EX
+ipng-router-backup --yaml config.yaml --parallel 20
+.EE
 .SH FILES
 .TP
 .I /etc/ipng-router-backup/config.yaml.example

src/main.go

@@ -7,6 +7,7 @@ import (
 	"log"
 	"os"
 	"path/filepath"
+	"sync"
 
 	"github.com/spf13/cobra"
 )
@@ -21,6 +22,29 @@ const Version = "1.2.4"
 
 // SSH helper functions are now in ssh.go
 
+// processDevice handles backup processing for a single device
+func processDevice(hostname string, deviceConfig Device, commands []string, excludePatterns []string, password, keyFile string, port int, outputDir string) bool {
+	// Create backup instance
+	backup := NewRouterBackup(hostname, deviceConfig.Address, deviceConfig.User, password, keyFile, port)
+
+	// Connect and backup
+	if err := backup.Connect(); err != nil {
+		fmt.Printf("%s: Failed to connect: %v\n", hostname, err)
+		return false
+	}
+
+	err := backup.BackupCommands(commands, excludePatterns, outputDir)
+	backup.Disconnect()
+
+	if err != nil {
+		fmt.Printf("%s: Backup failed: %v\n", hostname, err)
+		return false
+	} else {
+		fmt.Printf("%s: Backup completed\n", hostname)
+		return true
+	}
+}
+
 func main() {
 	var yamlFiles []string
 	var password string
@@ -28,6 +52,7 @@ func main() {
 	var port int
 	var outputDir string
 	var hostFilter []string
+	var parallel int
 
 	var rootCmd = &cobra.Command{
 		Use:     "ipng-router-backup",
@@ -93,12 +118,41 @@ func main() {
 				}
 			}
 
-			successCount := 0
 			totalCount := len(devicesToProcess)
 
-			for hostname, deviceConfig := range devicesToProcess {
-				fmt.Printf("\n%s: Processing device (type: %s)\n", hostname, deviceConfig.Type)
+			// Create channels for work distribution and result collection
+			type DeviceWork struct {
+				hostname        string
+				deviceConfig    Device
+				commands        []string
+				excludePatterns []string
+			}
 
+			type DeviceResult struct {
+				hostname string
+				success  bool
+			}
+
+			workChan := make(chan DeviceWork, totalCount)
+			resultChan := make(chan DeviceResult, totalCount)
+
+			// Start worker pool
+			var wg sync.WaitGroup
+			for i := 0; i < parallel; i++ {
+				wg.Add(1)
+				go func() {
+					defer wg.Done()
+					for work := range workChan {
+						fmt.Printf("%s: Processing device (type: %s)\n", work.hostname, work.deviceConfig.Type)
+
+						success := processDevice(work.hostname, work.deviceConfig, work.commands, work.excludePatterns, password, keyFile, port, outputDir)
+						resultChan <- DeviceResult{hostname: work.hostname, success: success}
+					}
+				}()
+			}
+
+			// Queue all work
+			for hostname, deviceConfig := range devicesToProcess {
 				user := deviceConfig.User
 				commands := deviceConfig.Commands
 				deviceType := deviceConfig.Type
@@ -122,27 +176,30 @@ func main() {
 					continue
 				}
 
-				// Create backup instance
-				backup := NewRouterBackup(hostname, deviceConfig.Address, user, password, keyFile, port)
-
-				// Connect and backup
-				if err := backup.Connect(); err != nil {
-					fmt.Printf("%s: Failed to connect: %v\n", hostname, err)
-					continue
+				workChan <- DeviceWork{
+					hostname:        hostname,
+					deviceConfig:    deviceConfig,
+					commands:        commands,
+					excludePatterns: excludePatterns,
 				}
+			}
+			close(workChan)
 
-				err = backup.BackupCommands(commands, excludePatterns, outputDir)
-				backup.Disconnect()
+			// Wait for all workers to finish
+			go func() {
+				wg.Wait()
+				close(resultChan)
+			}()
 
-				if err != nil {
-					fmt.Printf("%s: Backup failed: %v\n", hostname, err)
-				} else {
-					fmt.Printf("%s: Backup completed\n", hostname)
+			// Collect results
+			successCount := 0
+			for result := range resultChan {
+				if result.success {
 					successCount++
 				}
 			}
 
-			fmt.Printf("\nOverall summary: %d/%d devices processed successfully\n", successCount, totalCount)
+			fmt.Printf("Overall summary: %d/%d devices processed successfully\n", successCount, totalCount)
 
 			// Set exit code based on results
 			if successCount == 0 {
@@ -160,6 +217,7 @@ func main() {
 	rootCmd.Flags().IntVar(&port, "port", 22, "SSH port")
 	rootCmd.Flags().StringVar(&outputDir, "output-dir", "/tmp", "Output directory for command output files")
 	rootCmd.Flags().StringSliceVar(&hostFilter, "host", []string{}, "Specific host(s) to process (can be repeated, processes all if not specified)")
+	rootCmd.Flags().IntVar(&parallel, "parallel", 10, "Maximum number of devices to process in parallel")
 
 	rootCmd.MarkFlagRequired("yaml")