mirror of https://github.com/hashicorp/consul
118 lines
2.8 KiB
Go
118 lines
2.8 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package removepeer
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import (
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"flag"
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"fmt"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/command/flags"
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"github.com/mitchellh/cli"
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)
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func New(ui cli.Ui) *cmd {
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c := &cmd{UI: ui}
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c.init()
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return c
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}
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type cmd struct {
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UI cli.Ui
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flags *flag.FlagSet
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http *flags.HTTPFlags
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help string
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// flags
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address string
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id string
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}
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func (c *cmd) init() {
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c.flags = flag.NewFlagSet("", flag.ContinueOnError)
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c.flags.StringVar(&c.address, "address", "",
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"The address to remove from the Raft configuration.")
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c.flags.StringVar(&c.id, "id", "",
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"The ID to remove from the Raft configuration.")
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c.http = &flags.HTTPFlags{}
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flags.Merge(c.flags, c.http.ClientFlags())
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flags.Merge(c.flags, c.http.ServerFlags())
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c.help = flags.Usage(help, c.flags)
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}
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func (c *cmd) Run(args []string) int {
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if err := c.flags.Parse(args); err != nil {
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if err == flag.ErrHelp {
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return 0
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}
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c.UI.Error(fmt.Sprintf("Failed to parse args: %v", err))
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return 1
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}
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// Set up a client.
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client, err := c.http.APIClient()
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
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}
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// Fetch the current configuration.
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if err := raftRemovePeers(c.address, c.id, client.Operator()); err != nil {
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c.UI.Error(fmt.Sprintf("Error removing peer: %v", err))
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return 1
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}
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if c.address != "" {
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c.UI.Output(fmt.Sprintf("Removed peer with address %q", c.address))
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} else {
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c.UI.Output(fmt.Sprintf("Removed peer with id %q", c.id))
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}
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return 0
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}
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func raftRemovePeers(address, id string, operator *api.Operator) error {
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if len(address) == 0 && len(id) == 0 {
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return fmt.Errorf("an address or id is required for the peer to remove")
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}
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if len(address) > 0 && len(id) > 0 {
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return fmt.Errorf("cannot give both an address and id")
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}
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// Try to kick the peer.
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if len(address) > 0 {
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if err := operator.RaftRemovePeerByAddress(address, nil); err != nil {
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return err
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}
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} else {
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if err := operator.RaftRemovePeerByID(id, nil); err != nil {
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return err
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}
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}
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return nil
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}
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func (c *cmd) Synopsis() string {
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return synopsis
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}
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func (c *cmd) Help() string {
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return c.help
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}
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const synopsis = "Remove a Consul server from the Raft configuration"
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const help = `
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Usage: consul operator raft remove-peer [options]
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Remove the Consul server with given -address from the Raft configuration.
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There are rare cases where a peer may be left behind in the Raft quorum even
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though the server is no longer present and known to the cluster. This command
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can be used to remove the failed server so that it is no longer affects the Raft
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quorum. If the server still shows in the output of the "consul members" command,
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it is preferable to clean up by simply running "consul force-leave" instead of
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this command.
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`
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