Easily start EC2 servers automatically at a certain time
Download the zip file and deploy it as a lambda function.
After you deployed the lambda function, you navigate to Event sources and choose for the Scheduled Event. After naming your event, you can provide the following schedule expression.
cron(45 7 ? * MON-FRI *)
This expression wil launch the servers every weekday, from monday to friday, at 7:45 AM.
Tagging your instance is very important in order for the lambda function to work properly. The lambda function will retrieve all the instances that have a tag with a key LaunchGroup, and a value being the name of the cronjob rule you provided.
For instance, if you named your cronjob rule OfficeHoursLauncher, make sure you add a tag with key-value LaunchGroup=OfficeHoursLauncher to all the instances you want to launch at the provided schedule. You can add as many schedules as you want.
You can also manually invoke the lambda function to start your servers. Open the lambda function in the AWS Management Console. Click Actions and Configure test event. Provide the name of the launchgroup you want to start, for instance OfficeHoursLauncher and click Save and test.
Make sure your lambda function is able to describe and start instances.
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "MyStatementId",
"Effect": "Allow",
"Action": [
"ec2:DescribeInstances",
"ec2:StartInstances"
],
"Resource": [
"*"
]
}
]
}- aws-lambda-stop-server - The same function but for stopping the server.
MIT © Sam Verschueren