/
wait_state.go
77 lines (71 loc) · 1.63 KB
/
wait_state.go
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package cliaws
import (
"context"
"fmt"
"time"
"github.com/alexflint/go-arg"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/nathants/cli-aws/lib"
)
func init() {
lib.Commands["ec2-wait-state"] = ec2WaitState
lib.Args["ec2-wait-state"] = ec2WaitStateArgs{}
}
type ec2WaitStateArgs struct {
State string `arg:"positional,required"`
Selectors []string `arg:"positional,required" help:"instance-id | dns-name | private-dns-name | tag | vpc-id | subnet-id | security-group-id | ip-address | private-ip-address"`
}
func (ec2WaitStateArgs) Description() string {
return "\nwait for state\n"
}
func ec2WaitState() {
var args ec2WaitStateArgs
arg.MustParse(&args)
ctx := context.Background()
fail := true
for _, s := range args.Selectors {
if s != "" {
fail = false
break
}
}
if fail {
lib.Logger.Fatal("error: provide some selectors")
}
start := time.Now()
var instances []*ec2.Instance
var err error
for {
instances, err = lib.EC2ListInstances(ctx, args.Selectors, "")
if err != nil {
lib.Logger.Fatal("error: ", err)
}
if time.Since(start) > 15*time.Second {
err = fmt.Errorf("no instances found for those selectors")
if err != nil {
lib.Logger.Fatal("error: ", err)
}
}
if len(instances) > 0 {
break
}
}
for {
pass := true
for _, instance := range instances {
fmt.Println(*instance.State.Name, *instance.InstanceId)
switch args.State {
case ec2.InstanceStateNameRunning, ec2.InstanceStateNameStopped:
if args.State != *instance.State.Name {
pass = false
}
default:
panic(args.State)
}
}
if pass {
break
}
time.Sleep(1 * time.Second)
}
}