new service: version

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

cmd/ctr/main.go

@@ -5,7 +5,7 @@ import (
 	"os"
 
 	"github.com/Sirupsen/logrus"
-	"github.com/containerd/containerd"
+	"github.com/containerd/containerd/version"
 	"github.com/urfave/cli"
 )
 
@@ -15,14 +15,14 @@ var (
 
 func init() {
 	cli.VersionPrinter = func(c *cli.Context) {
-		fmt.Println(c.App.Name, containerd.Package, c.App.Version)
+		fmt.Println(c.App.Name, version.Package, c.App.Version)
 	}
 }
 
 func main() {
 	app := cli.NewApp()
 	app.Name = "ctr"
-	app.Version = containerd.Version
+	app.Version = version.Version
 	app.Usage = `
         __
   _____/ /______
@@ -61,6 +61,7 @@ containerd client
 		execCommand,
 		pauseCommand,
 		resumeCommand,
+		versionCommand,
 	}
 	app.Commands = append(app.Commands, extraCmds...)
 	app.Before = func(context *cli.Context) error {

cmd/ctr/utils.go

@@ -16,6 +16,7 @@ import (
 	"github.com/containerd/containerd/api/services/execution"
 	imagesapi "github.com/containerd/containerd/api/services/images"
 	rootfsapi "github.com/containerd/containerd/api/services/rootfs"
+	versionservice "github.com/containerd/containerd/api/services/version"
 	"github.com/containerd/containerd/api/types/container"
 	"github.com/containerd/containerd/content"
 	"github.com/containerd/containerd/images"
@@ -59,6 +60,14 @@ func getImageStore(clicontext *cli.Context) (images.Store, error) {
 	return imagesservice.NewStoreFromClient(imagesapi.NewImagesClient(conn)), nil
 }
 
+func getVersionService(context *cli.Context) (versionservice.VersionClient, error) {
+	conn, err := getGRPCConnection(context)
+	if err != nil {
+		return nil, err
+	}
+	return versionservice.NewVersionClient(conn), nil
+}
+
 func getTempDir(id string) (string, error) {
 	err := os.MkdirAll(filepath.Join(os.TempDir(), "ctr"), 0700)
 	if err != nil {

cmd/ctr/version.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	gocontext "context"
+	"fmt"
+	"os"
+
+	"github.com/containerd/containerd/version"
+	empty "github.com/golang/protobuf/ptypes/empty"
+	"github.com/urfave/cli"
+)
+
+var versionCommand = cli.Command{
+	Name:  "version",
+	Usage: "print the version",
+	Action: func(context *cli.Context) error {
+		if context.NArg() > 0 {
+			return fmt.Errorf("no argument expected")
+		}
+		fmt.Println("Client:")
+		fmt.Printf("  Version: %s\n", version.Version)
+		fmt.Printf("  Revision: %s\n", version.Revision)
+		fmt.Println("")
+		vs, err := getVersionService(context)
+		if err != nil {
+			return err
+		}
+		v, err := vs.Version(gocontext.Background(), &empty.Empty{})
+		if err != nil {
+			return err
+		}
+		fmt.Println("Server:")
+		fmt.Printf("  Version: %s\n", v.Version)
+		fmt.Printf("  Revision: %s\n", v.Revision)
+		if v.Version != version.Version {
+			fmt.Fprintf(os.Stderr, "WARNING: version mismatch\n")
+		}
+		if v.Revision != version.Revision {
+			fmt.Fprintf(os.Stderr, "WARNING: revision mismatch\n")
+		}
+		return nil
+	},
+}