mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
// Copyright 2017 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package command
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import (
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"fmt"
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"strconv"
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"time"
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"github.com/coreos/etcd/clientv3"
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"github.com/spf13/cobra"
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)
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// NewMoveLeaderCommand returns the cobra command for "move-leader".
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func NewMoveLeaderCommand() *cobra.Command {
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cmd := &cobra.Command{
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Use: "move-leader <transferee-member-id>",
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Short: "Transfers leadership to another etcd cluster member.",
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Run: transferLeadershipCommandFunc,
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}
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return cmd
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}
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// transferLeadershipCommandFunc executes the "compaction" command.
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func transferLeadershipCommandFunc(cmd *cobra.Command, args []string) {
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if len(args) != 1 {
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ExitWithError(ExitBadArgs, fmt.Errorf("move-leader command needs 1 argument"))
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}
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target, err := strconv.ParseUint(args[0], 16, 64)
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if err != nil {
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ExitWithError(ExitBadArgs, err)
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}
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c := mustClientFromCmd(cmd)
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eps := c.Endpoints()
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c.Close()
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ctx, cancel := commandCtx(cmd)
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// find current leader
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var leaderCli *clientv3.Client
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var leaderID uint64
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for _, ep := range eps {
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cli, err := clientv3.New(clientv3.Config{
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Endpoints: []string{ep},
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DialTimeout: 3 * time.Second,
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})
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if err != nil {
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ExitWithError(ExitError, err)
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}
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resp, err := cli.Status(ctx, ep)
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if err != nil {
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ExitWithError(ExitError, err)
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}
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if resp.Header.GetMemberId() == resp.Leader {
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leaderCli = cli
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leaderID = resp.Leader
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break
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}
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cli.Close()
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}
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if leaderCli == nil {
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ExitWithError(ExitBadArgs, fmt.Errorf("no leader endpoint given at %v", eps))
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}
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var resp *clientv3.MoveLeaderResponse
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resp, err = leaderCli.MoveLeader(ctx, target)
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cancel()
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if err != nil {
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ExitWithError(ExitError, err)
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}
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display.MoveLeader(leaderID, target, *resp)
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}
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