add etcd snapshot save subcommand

Signed-off-by: Brian Downs <brian.downs@gmail.com>

cmd/etcdsnapshot/main.go

@@ -17,7 +17,8 @@ func main() {
 			cmds.NewEtcdSnapshotSubcommands(
 				etcdsnapshot.Delete,
 				etcdsnapshot.List,
-				etcdsnapshot.Prune),
+				etcdsnapshot.Prune,
+				etcdsnapshot.Run),
 		),
 	}
 

cmd/k3s/main.go

@@ -46,6 +46,7 @@ func main() {
 		cmds.NewCheckConfigCommand(externalCLIAction("check-config", dataDir)),
 		cmds.NewEtcdSnapshotCommand(etcdsnapshotCommand,
 			cmds.NewEtcdSnapshotSubcommands(
+				etcdsnapshotCommand,
 				etcdsnapshotCommand,
 				etcdsnapshotCommand,
 				etcdsnapshotCommand),

cmd/server/main.go

@@ -47,7 +47,8 @@ func main() {
 			cmds.NewEtcdSnapshotSubcommands(
 				etcdsnapshot.Delete,
 				etcdsnapshot.List,
-				etcdsnapshot.Prune),
+				etcdsnapshot.Prune,
+				etcdsnapshot.Run),
 		),
 	}
 

main.go

@@ -31,7 +31,8 @@ func main() {
 			cmds.NewEtcdSnapshotSubcommands(
 				etcdsnapshot.Delete,
 				etcdsnapshot.List,
-				etcdsnapshot.Prune),
+				etcdsnapshot.Prune,
+				etcdsnapshot.Run),
 		),
 	}
 

pkg/cli/cmds/etcd_snapshot.go

@@ -95,7 +95,7 @@ func NewEtcdSnapshotCommand(action func(*cli.Context) error, subcommands []cli.C
 	}
 }
 
-func NewEtcdSnapshotSubcommands(delete, list, prune func(ctx *cli.Context) error) []cli.Command {
+func NewEtcdSnapshotSubcommands(delete, list, prune, save func(ctx *cli.Context) error) []cli.Command {
 	return []cli.Command{
 		{
 			Name:            "delete",
@@ -127,5 +127,17 @@ func NewEtcdSnapshotSubcommands(delete, list, prune func(ctx *cli.Context) error
 				Value:       defaultSnapshotRentention,
 			}),
 		},
+		{
+			Name:            "save",
+			Usage:           "Trigger an immediate etcd snapshot",
+			SkipFlagParsing: false,
+			SkipArgReorder:  true,
+			Action:          save,
+			Flags: append(EtcdSnapshotFlags, &cli.StringFlag{
+				Name:        "dir",
+				Usage:       "(db) Directory to save etcd on-demand snapshot. (default: ${data-dir}/db/snapshots)",
+				Destination: &ServerConfig.EtcdSnapshotDir,
+			}),
+		},
 	}
 }