119 lines
3.2 KiB
Go
119 lines
3.2 KiB
Go
package command
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import (
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"flag"
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"fmt"
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"github.com/hashicorp/consul/command/agent"
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"github.com/mitchellh/cli"
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"net"
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"regexp"
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"strings"
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)
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// MembersCommand is a Command implementation that queries a running
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// Consul agent what members are part of the cluster currently.
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type MembersCommand struct {
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Ui cli.Ui
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}
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func (c *MembersCommand) Help() string {
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helpText := `
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Usage: consul members [options]
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Outputs the members of a running Consul agent.
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Options:
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-detailed Additional information such as protocol verions
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will be shown.
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-role=<regexp> If provided, output is filtered to only nodes matching
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the regular expression for role
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-rpc-addr=127.0.0.1:8400 RPC address of the Consul agent.
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-status=<regexp> If provided, output is filtered to only nodes matching
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the regular expression for status
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-wan If the agent is in server mode, this can be used to return
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the other peers in the WAN pool
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`
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return strings.TrimSpace(helpText)
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}
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func (c *MembersCommand) Run(args []string) int {
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var detailed, wan bool
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var roleFilter, statusFilter string
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cmdFlags := flag.NewFlagSet("members", flag.ContinueOnError)
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cmdFlags.Usage = func() { c.Ui.Output(c.Help()) }
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cmdFlags.BoolVar(&detailed, "detailed", false, "detailed output")
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cmdFlags.BoolVar(&wan, "wan", false, "wan members")
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cmdFlags.StringVar(&roleFilter, "role", ".*", "role filter")
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cmdFlags.StringVar(&statusFilter, "status", ".*", "status filter")
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rpcAddr := RPCAddrFlag(cmdFlags)
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if err := cmdFlags.Parse(args); err != nil {
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return 1
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}
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// Compile the regexp
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roleRe, err := regexp.Compile(roleFilter)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to compile role regexp: %v", err))
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return 1
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}
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statusRe, err := regexp.Compile(statusFilter)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to compile status regexp: %v", err))
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return 1
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}
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client, err := RPCClient(*rpcAddr)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error connecting to Consul agent: %s", err))
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return 1
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}
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defer client.Close()
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var members []agent.Member
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if wan {
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members, err = client.WANMembers()
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} else {
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members, err = client.LANMembers()
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}
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error retrieving members: %s", err))
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return 1
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}
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for _, member := range members {
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// Skip the non-matching members
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if !roleRe.MatchString(member.Tags["role"]) || !statusRe.MatchString(member.Status) {
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continue
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}
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// Format the tags as tag1=v1,tag2=v2,...
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var tagPairs []string
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for name, value := range member.Tags {
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tagPairs = append(tagPairs, fmt.Sprintf("%s=%s", name, value))
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}
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tags := strings.Join(tagPairs, ",")
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addr := net.TCPAddr{IP: member.Addr, Port: int(member.Port)}
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c.Ui.Output(fmt.Sprintf("%s %s %s %s",
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member.Name, addr.String(), member.Status, tags))
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if detailed {
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c.Ui.Output(fmt.Sprintf(" Protocol Version: %d",
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member.DelegateCur))
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c.Ui.Output(fmt.Sprintf(" Available Protocol Range: [%d, %d]",
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member.DelegateMin, member.DelegateMax))
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}
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}
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return 0
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}
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func (c *MembersCommand) Synopsis() string {
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return "Lists the members of a Consul cluster"
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}
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