EC2 定時自動開關機

EC2 定時自動開關機

EC2 (虛擬主機) 是按時間計費的，如果它非24小時提供服務，我們則可以把它設置為上班開起、下班關閉，這樣一來就可以減少成本囉！

使用 Lamdba，需要先為它設置一個 role，讓它有權限對ec2 開啟Start / 關閉Stop

登入 AWS console > IAM > Role > 【create role】
下面是 policy 的 Json，並套用到 new role

{ 
  "Version": "2012-10-17", 
  "Statement": 
[ 
 { 
   "Effect": "Allow", "Action": [ "logs:CreateLogGroup", "logs:CreateLogStream", "logs:PutLogEvents" ], 
    "Resource": "arn:aws:logs:*:*:*" }, 
 { 
   "Effect": "Allow", "Action": [ "ec2:Start*", "ec2:Stop*" ], "Resource": "*" 
 } 
] 
}

Python code for Start instance

import boto3
# Enter the region your instances are in. Include only the region without specifying Availability Zone; e.g.; ‘us-east-1’
region = ‘XX-XXXXX-X’
# Enter your instances here: ex. [‘X-XXXXXXXX’, ‘X-XXXXXXXX’]
instances = [‘X-XXXXXXXX’]

def lambda_handler(event, context):
ec2 = boto3.client(‘ec2’, region_name=region)
ec2.start_instances(InstanceIds=instances)
print ‘started your instances: ‘ + str(instances)

Python code for Stop instance

import boto3
# Enter the region your instances are in. Include only the region without specifying Availability Zone; e.g., ‘us-east-1’
region = ‘XX-XXXXX-X’
# Enter your instances here: ex. [‘X-XXXXXXXX’, ‘X-XXXXXXXX’]
instances = [‘X-XXXXXXXX’]

def lambda_handler(event, context):
ec2 = boto3.client(‘ec2’, region_name=region)
ec2.stop_instances(InstanceIds=instances)
print ‘stopped your instances: ‘ + str(instances)

在CloudWatch新增兩筆 rule –> StartEC2 / StopEC2

Cloudwatch event setup for cron schedule
cloudwatch的時間排程設置，是UTC：而台灣時間 -8，就是UTC現在的時間，譬如台灣15點，減8 = 7點就是UTC的時間

點擊查詢現在的UTC時間

台灣的上午8點，UTC為：
0 0 ? * MON-FRI *

台灣的下午5點，UTC為：
0 9 ? * MON-FRI *

Cron Expressions 格式

下面這兩段影片，更清楚要怎麼設置，請享用～

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