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service.go
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service.go
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package ec2
import (
"fmt"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/ec2"
)
const DryRunOperation = "DryRunOperation"
func Start(svc *ec2.EC2, id string) {
instanceID := aws.StringSlice([]string{id})
input := &ec2.StartInstancesInput{
InstanceIds: instanceID,
DryRun: aws.Bool(true),
}
_, err := svc.StartInstances(input)
awsErr, ok := err.(awserr.Error)
if ok && awsErr.Code() == DryRunOperation {
input.DryRun = aws.Bool(false)
_, err = svc.StartInstances(input)
if err != nil {
fmt.Println("Error", err)
} else {
describeInstancesInput := &ec2.DescribeInstancesInput{
InstanceIds: instanceID,
}
if aerr := svc.WaitUntilInstanceRunning(describeInstancesInput); aerr != nil {
panic(aerr)
}
}
} else {
fmt.Println("Error", err)
}
}
func Stop(svc *ec2.EC2, id string) {
input := &ec2.StopInstancesInput{
InstanceIds: []*string{
aws.String(id),
},
DryRun: aws.Bool(true),
}
_, err := svc.StopInstances(input)
awsErr, ok := err.(awserr.Error)
if ok && awsErr.Code() == DryRunOperation {
input.DryRun = aws.Bool(false)
_, err = svc.StopInstances(input)
if err != nil {
fmt.Println("Error", err)
} else {
describeInstancesInput := &ec2.DescribeInstancesInput{
InstanceIds: aws.StringSlice([]string{id}),
}
if aerr := svc.WaitUntilInstanceStopped(describeInstancesInput); aerr != nil {
panic(aerr)
}
}
} else {
fmt.Println("Error", err)
}
}
func Status(svc *ec2.EC2, id string) string {
var status string
input := &ec2.DescribeInstancesInput{
InstanceIds: []*string{
aws.String(id),
},
DryRun: aws.Bool(false),
}
result, err := svc.DescribeInstances(input)
if err != nil {
fmt.Println("Error", err)
} else {
for _, reservation := range result.Reservations {
for _, instance := range reservation.Instances {
status = strings.Title(*instance.State.Name)
break
}
}
}
return status
}
func FetchInstanceID(svc *ec2.EC2, name string) string {
var instanceID string
params := &ec2.DescribeInstancesInput{
Filters: []*ec2.Filter{
{
Name: aws.String("tag:Name"),
Values: []*string{aws.String(name)},
},
},
}
result, err := svc.DescribeInstances(params)
if err != nil {
fmt.Println("Error", err)
}
for _, reservation := range result.Reservations {
for _, instance := range reservation.Instances {
instanceID = *instance.InstanceId
break
}
}
return instanceID
}