github.com/kaisenlinux/docker.io@v0.0.0-20230510090727-ea55db55fac7/swarmkit/cmd/swarmctl/node/list.go (about)

     1  package node
     2  
     3  import (
     4  	"errors"
     5  	"fmt"
     6  	"os"
     7  	"text/tabwriter"
     8  
     9  	"github.com/docker/swarmkit/api"
    10  	"github.com/docker/swarmkit/cmd/swarmctl/common"
    11  	"github.com/spf13/cobra"
    12  )
    13  
    14  var (
    15  	listCmd = &cobra.Command{
    16  		Use:   "ls",
    17  		Short: "List nodes",
    18  		RunE: func(cmd *cobra.Command, args []string) error {
    19  			if len(args) != 0 {
    20  				return errors.New("ls command takes no arguments")
    21  			}
    22  
    23  			flags := cmd.Flags()
    24  
    25  			quiet, err := flags.GetBool("quiet")
    26  			if err != nil {
    27  				return err
    28  			}
    29  
    30  			c, err := common.Dial(cmd)
    31  			if err != nil {
    32  				return err
    33  			}
    34  			r, err := c.ListNodes(common.Context(cmd), &api.ListNodesRequest{})
    35  			if err != nil {
    36  				return err
    37  			}
    38  
    39  			var output func(n *api.Node)
    40  
    41  			if !quiet {
    42  				w := tabwriter.NewWriter(os.Stdout, 0, 4, 2, ' ', 0)
    43  				defer func() {
    44  					// Ignore flushing errors - there's nothing we can do.
    45  					_ = w.Flush()
    46  				}()
    47  				common.PrintHeader(w, "ID", "Name", "Membership", "Status", "Availability", "Manager Status")
    48  				output = func(n *api.Node) {
    49  					spec := &n.Spec
    50  					name := spec.Annotations.Name
    51  					availability := spec.Availability.String()
    52  					membership := spec.Membership.String()
    53  
    54  					if name == "" && n.Description != nil {
    55  						name = n.Description.Hostname
    56  					}
    57  					reachability := ""
    58  					if n.ManagerStatus != nil {
    59  						reachability = n.ManagerStatus.Reachability.String()
    60  						if n.ManagerStatus.Leader {
    61  							reachability = reachability + " *"
    62  						}
    63  					}
    64  					if reachability == "" && spec.DesiredRole == api.NodeRoleManager {
    65  						reachability = "UNKNOWN"
    66  					}
    67  
    68  					fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\t%s\n",
    69  						n.ID,
    70  						name,
    71  						membership,
    72  						n.Status.State.String(),
    73  						availability,
    74  						reachability,
    75  					)
    76  				}
    77  			} else {
    78  				output = func(n *api.Node) { fmt.Println(n.ID) }
    79  			}
    80  
    81  			for _, n := range r.Nodes {
    82  				output(n)
    83  			}
    84  			return nil
    85  		},
    86  	}
    87  )
    88  
    89  func init() {
    90  	listCmd.Flags().BoolP("quiet", "q", false, "Only display IDs")
    91  }