91 lines
1.8 KiB
Go
91 lines
1.8 KiB
Go
package transferleader
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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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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.http = &flags.HTTPFlags{}
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c.flags.StringVar(&c.id, "id", "",
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"The ID of the node to transfer leadership to.")
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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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result, err := raftTransferLeader(client, c.http.Stale())
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error transfering leadership: %v", err))
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return 1
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}
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c.UI.Output(result)
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return 0
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}
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func raftTransferLeader(client *api.Client, stale bool) (string, error) {
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q := &api.QueryOptions{
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AllowStale: stale,
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}
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reply, err := client.Operator().RaftLeaderTransfer(q)
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if err != nil {
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return "", fmt.Errorf("Failed to transfer leadership %w", err)
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}
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if !reply.Success {
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return "", fmt.Errorf("Failed to transfer leadership")
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}
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return "Success", 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 = "Transfer raft leadership to another node"
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const help = `
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Usage: consul operator raft transfer-leader [options]
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Transfer raft leadership to another node.
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`
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