115 lines
3.0 KiB
Go
115 lines
3.0 KiB
Go
package command
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import (
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"fmt"
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"strings"
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"github.com/hashicorp/nomad/api"
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"github.com/posener/complete"
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)
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type OperatorRaftRemoveCommand struct {
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Meta
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}
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func (c *OperatorRaftRemoveCommand) Help() string {
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helpText := `
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Usage: nomad operator raft remove-peer [options]
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Remove the Nomad server with given -peer-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
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Raft quorum. If the server still shows in the output of the "nomad
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server-members" command, it is preferable to clean up by simply running "nomad
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server-force-leave" instead of this command.
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General Options:
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` + generalOptionsUsage() + `
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Remove Peer Options:
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-peer-address="IP:port"
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Remove a Nomad server with given address from the Raft configuration.
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-peer-id="id"
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Remove a Nomad server with the given ID from the Raft configuration.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *OperatorRaftRemoveCommand) AutocompleteFlags() complete.Flags {
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return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
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complete.Flags{
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"-peer-address": complete.PredictAnything,
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"-peer-id": complete.PredictAnything,
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})
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}
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func (c *OperatorRaftRemoveCommand) AutocompleteArgs() complete.Predictor {
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return complete.PredictNothing
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}
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func (c *OperatorRaftRemoveCommand) Synopsis() string {
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return "Remove a Nomad server from the Raft configuration"
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}
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func (c *OperatorRaftRemoveCommand) Run(args []string) int {
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var peerAddress string
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var peerID string
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flags := c.Meta.FlagSet("raft", FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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flags.StringVar(&peerAddress, "peer-address", "", "")
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flags.StringVar(&peerID, "peer-id", "", "")
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if err := flags.Parse(args); err != nil {
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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.Meta.Client()
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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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operator := client.Operator()
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if err := raftRemovePeers(peerAddress, peerID, 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 peerAddress != "" {
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c.Ui.Output(fmt.Sprintf("Removed peer with address %q", peerAddress))
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} else {
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c.Ui.Output(fmt.Sprintf("Removed peer with id %q", peerID))
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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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