pdctl support health check (#792)

pdctl/command/health_command.go

@@ -0,0 +1,44 @@
+// Copyright 2017 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package command
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	healthPrefix = "health"
+)
+
+// NewHealthCommand return a health subcommand of rootCmd
+func NewHealthCommand() *cobra.Command {
+	m := &cobra.Command{
+		Use:   "health",
+		Short: "show the health information",
+		Run:   showHealthCommandFunc,
+	}
+	return m
+}
+
+func showHealthCommandFunc(cmd *cobra.Command, args []string) {
+	r, err := doRequest(cmd, healthPrefix, http.MethodGet)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	fmt.Println(r)
+}

pdctl/ctl.go

@@ -51,6 +51,7 @@ func init() {
 		command.NewHotSpotCommand(),
 		command.NewClusterCommand(),
 		command.NewNamespaceCommand(),
+		command.NewHealthCommand(),
 	)
 	cobra.EnablePrefixMatching = true
 }