command/ls/members/members.go
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package members
import (
"bytes"
"flag"
"fmt"
"os"
"strings"
"text/tabwriter"
"git.j3s.sh/cascade/api"
)
const usage = `cascade ls members [options]
this command lists the members of the cascade serf
cluster.
options:
-api
address of the api to target (default = 127.0.0.1:8500)
-l | -details
show more details (default = nil)
`
type Flags struct {
apiAddr string
details bool
}
var membersFlags Flags
func Run(args []string) {
flags := flag.NewFlagSet("agent", flag.ContinueOnError)
flags.Usage = func() { fmt.Printf(usage) }
flags.StringVar(&membersFlags.apiAddr, "api", "", "")
flags.BoolVar(&membersFlags.details, "l", false, "")
flags.BoolVar(&membersFlags.details, "details", false, "")
flags.Parse(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 membersFlags.details {
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", 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 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, ",")
}