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main.go
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main.go
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package main
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ec2"
flag "github.com/spf13/pflag"
)
func Session() (sess *session.Session) {
sess = session.Must(session.NewSession(&aws.Config{
Region: aws.String("ap-northeast-1"),
}))
return
}
var (
helpFlag = flag.BoolP("help", "h", false, "show help message")
instanceid = flag.StringP("instanceid", "i", "", "ec2 instanceid")
publicipFlag = flag.BoolP("publicip", "p", false, "show public ip address only")
)
func main() {
flag.Parse()
if *helpFlag {
flag.PrintDefaults()
return
}
svc := ec2.New(Session())
input := &ec2.DescribeInstancesInput{
InstanceIds: []*string{
aws.String(*instanceid),
},
}
result, err := svc.DescribeInstances(input)
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
default:
fmt.Println(aerr.Error())
}
} else {
fmt.Println(err.Error())
}
return
}
if *publicipFlag {
fmt.Println(*result.Reservations[0].Instances[0].NetworkInterfaces[0].Association.PublicIp)
return
}
fmt.Println(result)
}