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12a00e6017
As described in our ROADMAP.md, introduce new Swarm management commands to call to the corresponding API endpoints. This PR is fully backward compatible (joining a Swarm is an optional feature of the Engine, and existing commands are not impacted). Signed-off-by: Daniel Nephin <dnephin@docker.com> Signed-off-by: Victor Vieux <vieux@docker.com> Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
119 lines
2.5 KiB
Go
119 lines
2.5 KiB
Go
package node
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import (
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"fmt"
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"io"
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"text/tabwriter"
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"golang.org/x/net/context"
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"github.com/docker/docker/api/client"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/opts"
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"github.com/docker/engine-api/types"
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"github.com/docker/engine-api/types/swarm"
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"github.com/spf13/cobra"
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)
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const (
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listItemFmt = "%s\t%s\t%s\t%s\t%s\t%s\t%s\n"
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)
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type listOptions struct {
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quiet bool
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filter opts.FilterOpt
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}
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func newListCommand(dockerCli *client.DockerCli) *cobra.Command {
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opts := listOptions{filter: opts.NewFilterOpt()}
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cmd := &cobra.Command{
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Use: "ls",
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Aliases: []string{"list"},
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Short: "List nodes in the swarm",
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Args: cli.NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runList(dockerCli, opts)
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},
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}
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flags := cmd.Flags()
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flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only display IDs")
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flags.VarP(&opts.filter, "filter", "f", "Filter output based on conditions provided")
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return cmd
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}
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func runList(dockerCli *client.DockerCli, opts listOptions) error {
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client := dockerCli.Client()
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ctx := context.Background()
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nodes, err := client.NodeList(
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ctx,
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types.NodeListOptions{Filter: opts.filter.Value()})
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if err != nil {
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return err
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}
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info, err := client.Info(ctx)
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if err != nil {
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return err
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}
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out := dockerCli.Out()
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if opts.quiet {
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printQuiet(out, nodes)
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} else {
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printTable(out, nodes, info)
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}
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return nil
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}
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func printTable(out io.Writer, nodes []swarm.Node, info types.Info) {
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writer := tabwriter.NewWriter(out, 0, 4, 2, ' ', 0)
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// Ignore flushing errors
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defer writer.Flush()
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fmt.Fprintf(writer, listItemFmt, "ID", "NAME", "MEMBERSHIP", "STATUS", "AVAILABILITY", "MANAGER STATUS", "LEADER")
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for _, node := range nodes {
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name := node.Spec.Name
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availability := string(node.Spec.Availability)
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membership := string(node.Spec.Membership)
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if name == "" {
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name = node.Description.Hostname
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}
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leader := ""
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if node.ManagerStatus != nil && node.ManagerStatus.Leader {
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leader = "Yes"
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}
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reachability := ""
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if node.ManagerStatus != nil {
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reachability = string(node.ManagerStatus.Reachability)
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}
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ID := node.ID
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if node.ID == info.Swarm.NodeID {
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ID = ID + " *"
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}
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fmt.Fprintf(
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writer,
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listItemFmt,
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ID,
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name,
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client.PrettyPrint(membership),
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client.PrettyPrint(string(node.Status.State)),
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client.PrettyPrint(availability),
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client.PrettyPrint(reachability),
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leader)
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}
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}
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func printQuiet(out io.Writer, nodes []swarm.Node) {
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for _, node := range nodes {
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fmt.Fprintln(out, node.ID)
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}
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}
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