github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/pkg/lorry/ctl/switchover.go (about)

     1  /*
     2  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     3  
     4  This file is part of KubeBlocks project
     5  
     6  This program is free software: you can redistribute it and/or modify
     7  it under the terms of the GNU Affero General Public License as published by
     8  the Free Software Foundation, either version 3 of the License, or
     9  (at your option) any later version.
    10  
    11  This program is distributed in the hope that it will be useful
    12  but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  GNU Affero General Public License for more details.
    15  
    16  You should have received a copy of the GNU Affero General Public License
    17  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18  */
    19  
    20  package ctl
    21  
    22  import (
    23  	"fmt"
    24  	"io"
    25  	"net/http"
    26  	"os"
    27  	"strings"
    28  
    29  	"github.com/spf13/cobra"
    30  
    31  	"github.com/1aal/kubeblocks/pkg/constant"
    32  )
    33  
    34  type SwitchOptions struct {
    35  	primary   string
    36  	candidate string
    37  	lorryAddr string
    38  }
    39  
    40  var switchOptions = &SwitchOptions{}
    41  var SwitchCmd = &cobra.Command{
    42  	Use:   "switchover",
    43  	Short: "execute a switchover request.",
    44  	Example: `
    45  lorryctl switchover  --primary xxx --candidate xxx
    46    `,
    47  	Args: cobra.MinimumNArgs(0),
    48  	Run: func(cmd *cobra.Command, args []string) {
    49  		var characterType string
    50  		if characterType = os.Getenv(constant.KBEnvCharacterType); characterType == "" {
    51  			fmt.Println("KB_SERVICE_CHARACTER_TYPE must be set")
    52  			return
    53  		}
    54  
    55  		url := "http://" + switchOptions.lorryAddr + "/v1.0/bindings/" + characterType
    56  		if switchOptions.primary == "" && switchOptions.candidate == "" {
    57  			fmt.Println("Primary or Candidate must be specified")
    58  			return
    59  		}
    60  
    61  		payload := fmt.Sprintf(`{"operation": "switchover", "metadata": {"leader": "%s", "candidate": "%s"}}`, switchOptions.primary, switchOptions.candidate)
    62  		// fmt.Println(payload)
    63  
    64  		client := http.Client{}
    65  		req, err := http.NewRequest("POST", url, strings.NewReader(payload))
    66  		if err != nil {
    67  			fmt.Printf("New request error: %v", err)
    68  		}
    69  
    70  		resp, err := client.Do(req)
    71  		if err != nil {
    72  			fmt.Printf("Request Lorry error: %v", err)
    73  			return
    74  		}
    75  		fmt.Println("Lorry Response:")
    76  		bodyBytes, err := io.ReadAll(resp.Body)
    77  		if err != nil {
    78  			fmt.Printf("request error: %v", err)
    79  		}
    80  		fmt.Println(string(bodyBytes))
    81  	},
    82  }
    83  
    84  func init() {
    85  	SwitchCmd.Flags().StringVarP(&switchOptions.primary, "primary", "l", "", "The primary pod name")
    86  	SwitchCmd.Flags().StringVarP(&switchOptions.candidate, "candidate", "c", "", "The candidate pod name")
    87  	SwitchCmd.Flags().StringVarP(&switchOptions.lorryAddr, "lorry-addr", "", "localhost:3501", "The addr of lorry to request")
    88  	SwitchCmd.Flags().BoolP("help", "h", false, "Print this help message")
    89  
    90  	RootCmd.AddCommand(SwitchCmd)
    91  }