| package node |
| |
| import ( |
| "fmt" |
| "io" |
| "text/tabwriter" |
| |
| "golang.org/x/net/context" |
| |
| "github.com/docker/docker/api/types" |
| "github.com/docker/docker/api/types/swarm" |
| "github.com/docker/docker/cli" |
| "github.com/docker/docker/cli/command" |
| "github.com/docker/docker/opts" |
| "github.com/spf13/cobra" |
| ) |
| |
| const ( |
| listItemFmt = "%s\t%s\t%s\t%s\t%s\n" |
| ) |
| |
| type listOptions struct { |
| quiet bool |
| filter opts.FilterOpt |
| } |
| |
| func newListCommand(dockerCli *command.DockerCli) *cobra.Command { |
| opts := listOptions{filter: opts.NewFilterOpt()} |
| |
| cmd := &cobra.Command{ |
| Use: "ls [OPTIONS]", |
| Aliases: []string{"list"}, |
| Short: "List nodes in the swarm", |
| Args: cli.NoArgs, |
| RunE: func(cmd *cobra.Command, args []string) error { |
| return runList(dockerCli, opts) |
| }, |
| } |
| flags := cmd.Flags() |
| flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only display IDs") |
| flags.VarP(&opts.filter, "filter", "f", "Filter output based on conditions provided") |
| |
| return cmd |
| } |
| |
| func runList(dockerCli *command.DockerCli, opts listOptions) error { |
| client := dockerCli.Client() |
| out := dockerCli.Out() |
| ctx := context.Background() |
| |
| nodes, err := client.NodeList( |
| ctx, |
| types.NodeListOptions{Filters: opts.filter.Value()}) |
| if err != nil { |
| return err |
| } |
| |
| if len(nodes) > 0 && !opts.quiet { |
| // only non-empty nodes and not quiet, should we call /info api |
| info, err := client.Info(ctx) |
| if err != nil { |
| return err |
| } |
| printTable(out, nodes, info) |
| } else if !opts.quiet { |
| // no nodes and not quiet, print only one line with columns ID, HOSTNAME, ... |
| printTable(out, nodes, types.Info{}) |
| } else { |
| printQuiet(out, nodes) |
| } |
| |
| return nil |
| } |
| |
| func printTable(out io.Writer, nodes []swarm.Node, info types.Info) { |
| writer := tabwriter.NewWriter(out, 0, 4, 2, ' ', 0) |
| |
| // Ignore flushing errors |
| defer writer.Flush() |
| |
| fmt.Fprintf(writer, listItemFmt, "ID", "HOSTNAME", "STATUS", "AVAILABILITY", "MANAGER STATUS") |
| for _, node := range nodes { |
| name := node.Description.Hostname |
| availability := string(node.Spec.Availability) |
| |
| reachability := "" |
| if node.ManagerStatus != nil { |
| if node.ManagerStatus.Leader { |
| reachability = "Leader" |
| } else { |
| reachability = string(node.ManagerStatus.Reachability) |
| } |
| } |
| |
| ID := node.ID |
| if node.ID == info.Swarm.NodeID { |
| ID = ID + " *" |
| } |
| |
| fmt.Fprintf( |
| writer, |
| listItemFmt, |
| ID, |
| name, |
| command.PrettyPrint(string(node.Status.State)), |
| command.PrettyPrint(availability), |
| command.PrettyPrint(reachability)) |
| } |
| } |
| |
| func printQuiet(out io.Writer, nodes []swarm.Node) { |
| for _, node := range nodes { |
| fmt.Fprintln(out, node.ID) |
| } |
| } |