ctlv3: overwrite "snapshot restore" output with os.Stdout

Fix etcd-io#9179.

Signed-off-by: Gyuho Lee <[email protected]>

etcdctl/ctlv3/command/snapshot_command.go

@@ -17,13 +17,15 @@ package command
 import (
 	"context"
 	"fmt"
+	"os"
 	"path/filepath"
 	"strings"
 
 	"github.com/coreos/etcd/pkg/logger"
 	"github.com/coreos/etcd/pkg/types"
 	"github.com/coreos/etcd/snapshot"
 
+	"github.com/coreos/pkg/capnslog"
 	"github.com/spf13/cobra"
 )
 
@@ -90,6 +92,11 @@ func NewSnapshotRestoreCommand() *cobra.Command {
 	return cmd
 }
 
+func init() {
+	// overwrite output (capnslog defaults to os.Stderr)
+	capnslog.SetFormatter(capnslog.NewDefaultFormatter(os.Stdout))
+}
+
 func snapshotSaveCommandFunc(cmd *cobra.Command, args []string) {
 	if len(args) != 1 {
 		err := fmt.Errorf("snapshot save expects one argument")