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