콘텐츠로 이동

Boto3 사용 예시

  1. 인스턴스 타입 변경
    change_instance_type.py
     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
    ##############################################
TARGET_INSTANCE_IDs = ["i-0351fd54bd47a17db"]
TARGET_INSTANCE_TYPE = "t2.nano"
##############################################

import boto3

ec2 = boto3.client("ec2")

def stop_instance(instance_id):
    try:
        ec2.stop_instances(InstanceIds=[instance_id])
        print(f"trying to STOP INSTANCE {instance_id}...", end="")
        waiter = ec2.get_waiter("instance_stopped")
        waiter.wait(InstanceIds=[instance_id])
        print(f"SUCCESS")
        return True  # 인스턴스 정지 성공
    except:
        print(f"FAILED : STOP INSTANCE {instance_id}")
        return False


def modify_instance_type(instance_id):
    try:
        ec2.modify_instance_attribute(
            InstanceId=instance_id, InstanceType={"Value": TARGET_INSTANCE_TYPE}
        )
        print(f"SUCCESS : {instance_id} INSTANCE CHANGED TO {TARGET_INSTANCE_TYPE}")
    except:
        print(f"FAILED : CHANGE {instance_id} INSTANCE TYPE")


def start_instance(instance_id):
    try:
        ec2.start_instances(InstanceIds=[instance_id])
        print(f"SUCCESS : RESTART {instance_id}")
    except:
        print(f"FAILED : START INSTANCE {instance_id}")


def main():
    for instance_id in TARGET_INSTANCE_IDs:
        is_stopped = stop_instance(instance_id)  # is_stopped는 인스턴스 정지 성공 유무 표시용
        if is_stopped:
            modify_instance_type(instance_id)
            start_instance(instance_id)


main()
  2. Target group deregister후 instance stop하기 
    import boto3
from botocore.exceptions import ClientError

TARGET_INSTANCE_IDs = ["i-0f8e23d613b7d62f0"]
TARGET_GROUP_ARN = "arn:aws:elasticloadbalancing:ap-northeast-2:737382971423:targetgroup/testTG/36174c22e12f595e"

elb = boto3.client("elbv2")
ec2 = boto3.client("ec2")


def detach_instance(TGarn, instance_id):
    try:
        response = elb.deregister_targets(
            TargetGroupArn=TGarn, 
            Targets=[{"Id": instance_id}], 
        )
        print(response)
        return response
    except:
        raise Exception("ERROR : FAIL TO DETACH INSTANCE FORM TARGET GROUP")


def stop_instance(instance_id):
    try:
        response = ec2.stop_instances(InstanceIds=instance_id, DryRun=False)
        print(f"STOP SUCCESS : {response}")
    except ClientError as e:
        print(f"ERROR : {e}")


def main():
    for instance in TARGET_INSTANCE_IDs:
        detach_instance(TARGET_GROUP_ARN, instance)
    stop_instance(TARGET_INSTANCE_IDs)
  3. AMI해제 후 연관 snapshot 삭제
    remove_ami_and_snapshots.py
     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
    import boto3

DRYRUN = False
target_region = 'ap-southeast-1'
target_ami_ids = [
            #AMI IDs
        ]

ec2 = boto3.client('ec2', region_name=target_region)
images = ec2.describe_images(ImageIds=target_ami_ids)

def remove_snapshots(snapshot_ids):
    for snapshot_id in snapshot_ids:
        try:
            print('|remove', snapshot_id, end=':')
            ec2.delete_snapshot(SnapshotId=snapshot_id, DryRun=DRYRUN)
            print('success', end='')
        except:
            print('fail')
    print()

for target_image in images['Images']:
    print('remove ',target_image['ImageId'], end=':')
    try:
        ec2.deregister_image(ImageId=target_image['ImageId'], DryRun=DRYRUN)
        print('success', end='')
        snapshot_ids=[]
        for block_devices in target_image['BlockDeviceMappings']:
            try: #AMI 삭제 성공 시 Snapshot 제거 대상 리스트에 append
                snapshot_ids.append(block_devices['Ebs']['SnapshotId'])
            except:
                pass
        remove_snapshots(snapshot_ids)
    except:
        print('fail')