-
Notifications
You must be signed in to change notification settings - Fork 0
/
list.go
111 lines (92 loc) · 2.32 KB
/
list.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
package node
import (
"fmt"
"io"
"text/tabwriter"
"golang.org/x/net/context"
"github.com/docker/docker/api/client"
"github.com/docker/docker/cli"
"github.com/docker/docker/opts"
"github.com/docker/engine-api/types"
"github.com/docker/engine-api/types/swarm"
"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 *client.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 *client.DockerCli, opts listOptions) error {
client := dockerCli.Client()
ctx := context.Background()
nodes, err := client.NodeList(
ctx,
types.NodeListOptions{Filter: opts.filter.Value()})
if err != nil {
return err
}
info, err := client.Info(ctx)
if err != nil {
return err
}
out := dockerCli.Out()
if opts.quiet {
printQuiet(out, nodes)
} else {
printTable(out, nodes, info)
}
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,
client.PrettyPrint(string(node.Status.State)),
client.PrettyPrint(availability),
client.PrettyPrint(reachability))
}
}
func printQuiet(out io.Writer, nodes []swarm.Node) {
for _, node := range nodes {
fmt.Fprintln(out, node.ID)
}
}