feat: Add autorestart and restartdelay flags to Windows service (#10559)

cmd/telegraf/telegraf.go

@@ -96,6 +96,14 @@ var fServiceName = flag.String("service-name", "telegraf",
 var fServiceDisplayName = flag.String("service-display-name", "Telegraf Data Collector Service",
 	"service display name (windows only)")
 
+//nolint:varcheck,unused // False positive - this var is used for non-default build tag: windows
+var fServiceAutoRestart = flag.Bool("service-auto-restart", false,
+	"auto restart service on failure (windows only)")
+
+//nolint:varcheck,unused // False positive - this var is used for non-default build tag: windows
+var fServiceRestartDelay = flag.String("service-restart-delay", "5m",
+	"delay before service auto restart, default is 5m (windows only)")
+
 //nolint:varcheck,unused // False positive - this var is used for non-default build tag: windows
 var fRunAsConsole = flag.Bool("console", false,
 	"run as console application (windows only)")

cmd/telegraf/telegraf_windows.go

@@ -94,6 +94,10 @@ func runAsWindowsService(inputFilters, outputFilters []string) {
 		//set servicename to service cmd line, to have a custom name after relaunch as a service
 		svcConfig.Arguments = append(svcConfig.Arguments, "--service-name", *fServiceName)
 
+		if *fServiceAutoRestart {
+			svcConfig.Option = service.KeyValue{"OnFailure": "restart", "OnFailureDelayDuration": *fServiceRestartDelay}
+		}
+
 		err := service.Control(s, *fService)
 		if err != nil {
 			log.Fatal("E! " + err.Error())

docs/WINDOWS_SERVICE.md

@@ -61,6 +61,10 @@ on a single system, you can install the service with the `--service-name` and
 > C:\"Program Files"\Telegraf\telegraf.exe --service install --service-name telegraf-2 --service-display-name "Telegraf 2"
 ```
 
+## Auto restart and restart delay
+
+By default the service will not automatically restart on failure. Providing the `--service-auto-restart` flag during installation will always restart the service with a default delay of 5 minutes. To modify this to for example 3 minutes, provide the additional flag `--service-restart-delay 3m`. The delay can be any valid `time.Duration` string.
+
 ## Troubleshooting
 
 When Telegraf runs as a Windows service, Telegraf logs messages to Windows events log before configuration file with logging settings is loaded.

internal/usage_windows.go

@@ -44,6 +44,8 @@ The commands & flags are:
   --service <service>            operate on the service (windows only)
   --service-name                 service name (windows only)
   --service-display-name         service display name (windows only)
+  --service-auto-restart         auto restart service on failure (windows only)
+  --service-restart-delay        delay before service auto restart, default is 5m (windows only)
 
 Examples:
 
@@ -73,4 +75,7 @@ Examples:
 
   # install telegraf service with custom name
   telegraf --service install --service-name=my-telegraf --service-display-name="My Telegraf"
-`
+
+  # install telegraf service with auto restart and restart delay of 3 minutes
+  telegraf --service install --service-auto-restart --service-restart-delay 3m
+  `