internal/cli/members.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
package cli
import (
"bytes"
"flag"
"fmt"
"os"
"strings"
"text/tabwriter"
"git.j3s.sh/cascade/api"
)
type membersCommand struct {
usage string
flagAPIAddr string
flagDetails bool
}
func (c membersCommand) Usage() {
fmt.Printf(`usage: cascade members [flags]
list the members of the cascade serf cluster
flags:
-api
address of the cascade http api to target (default = 127.0.0.1:8500)
-details | -l
show more details (default = nil)
`)
}
func (c *membersCommand) Init(args []string) {
flags := flag.NewFlagSet("", flag.ContinueOnError)
flags.Usage = c.Usage
flags.StringVar(&c.flagAPIAddr, "api", "", "")
flags.BoolVar(&c.flagDetails, "details", false, "")
flags.BoolVar(&c.flagDetails, "l", false, "")
if err := flags.Parse(args); err != nil {
fmt.Println(err)
os.Exit(1)
}
}
func RunMembers(args []string) {
c := membersCommand{}
c.Init(args)
cfg := api.DefaultConfig()
client, err := api.NewClient(cfg)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
members, err := client.Agent().Members()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
if c.flagDetails {
var b bytes.Buffer
tw := tabwriter.NewWriter(&b, 0, 2, 2, ' ', 0)
fmt.Fprintf(tw, "node\taddr\tstatus\ttags\n")
for _, m := range members {
fmt.Fprintf(tw, "%s\t", m.Name)
fmt.Fprintf(tw, "%s:%d\t", m.Addr, m.Port)
fmt.Fprintf(tw, "%s\t", m.StatusPretty())
fmt.Fprintf(tw, "%s\t", c.printTags(m.Tags))
fmt.Fprintln(tw)
}
if err := tw.Flush(); err != nil {
fmt.Printf("error flushing tabwriter: %s", err)
os.Exit(1)
}
fmt.Print(b.String())
} else {
for _, m := range members {
fmt.Println(m.Name)
}
}
}
func (c membersCommand) printTags(tags map[string]string) string {
var results []string
for k, v := range tags {
results = append(results, fmt.Sprintf("%s=%s", k, v))
}
return strings.Join(results, ",")
}