consul/command/operraftlist/operator_raft_list.go

100 lines
2.1 KiB
Go

package operraftlist
import (
"flag"
"fmt"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/command/flags"
"github.com/mitchellh/cli"
"github.com/ryanuber/columnize"
)
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
usage string
}
func (c *cmd) init() {
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
c.http = &flags.HTTPFlags{}
flags.Merge(c.flags, c.http.ClientFlags())
flags.Merge(c.flags, c.http.ServerFlags())
c.usage = flags.Usage(usage, c.flags, c.http.ClientFlags(), c.http.ServerFlags())
}
func (c *cmd) Synopsis() string {
return "Display the current Raft peer configuration"
}
func (c *cmd) Help() string {
return c.usage
}
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.
result, err := raftListPeers(client, c.http.Stale())
if err != nil {
c.UI.Error(fmt.Sprintf("Error getting peers: %v", err))
return 1
}
c.UI.Output(result)
return 0
}
func raftListPeers(client *api.Client, stale bool) (string, error) {
q := &api.QueryOptions{
AllowStale: stale,
}
reply, err := client.Operator().RaftGetConfiguration(q)
if err != nil {
return "", fmt.Errorf("Failed to retrieve raft configuration: %v", err)
}
// Format it as a nice table.
result := []string{"Node|ID|Address|State|Voter|RaftProtocol"}
for _, s := range reply.Servers {
raftProtocol := s.ProtocolVersion
if raftProtocol == "" {
raftProtocol = "<=1"
}
state := "follower"
if s.Leader {
state = "leader"
}
result = append(result, fmt.Sprintf("%s|%s|%s|%s|%v|%s",
s.Node, s.ID, s.Address, state, s.Voter, raftProtocol))
}
return columnize.SimpleFormat(result), nil
}
const usage = `Usage: consul operator raft list-peers [options]
Displays the current Raft peer configuration.`