CODEWITHSUNDEEP
amazon-web-servicesamazon-ec2aws-lambdaamazon-dynamodbscheduler
Digi Jaco
Digi Jaco

Reputation: 33

How can I turn on/off my AWS EC2 Scheduler with Lambda/DynamoDB twice a day?

I want to set a schedule for my EC2 to turn on twice a day at two specific times - at 12:00AM and at 12:00PM - and turn off after 30mins (at 12:30PM and 00:30AM).

I created one EC2 Scheduler/Table (tagname: Schedule) and I then setup two schedules in the config file (refresh-1 and refresh-2), which include the two periods/hours.

When I add the "key" and "value" fields to my "Manage Tasks" page in EC2, I get an error message saying that I can only specific a unique tag key.

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Does this mean that I need two separate EC2 Schedulers/Tables in order to turn on/off my EC2 at two different times? For instance:

What's the simplest solution to set this up, trying to leverage just one EC2 Scheduler/Table?

NB: I'd like to use Lambda/DynamoDB, not other solutions preferably.

Thanks!

Upvotes: 1

Views: 297

Answers (2)

JD D
JD D

Reputation: 8097

The error you are seeing is because you cannot have two EC2 tags with the same key. So you may only have a single Schedule tag on each EC2 instance.

After reviewing the EC2 Instance Scheduler documentation, you should create two periods instead of creating two schedules. One period for 12:00am-12:30am and another for 12:00pm to 12:30pm. Then create one schedule that references both periods.

Using the CLI it would be something like:

$ scheduler-cli create-period --name noon30 --begintime 12:00 --endtime 12:30 --stack Scheduler

$ scheduler-cli create-period --name midnight30 --begintime 00:00 --endtime 00:30 --stack Scheduler

$ scheduler-cli create-schedule --name my-refresh --periods
noon30,midnight30 --timezone Europe/London --stack Scheduler

Upvotes: 1

John Rotenstein
John Rotenstein

Reputation: 269101

Instead of using the AWS Instance Scheduler, you might be interested in the Simple EC2 Stopinator in Lambda - DEV Community that I created. It uses a single Lambda function and an IAM Role, nothing else.

It can specify a duration after which the instance should be terminated (good for sandbox testing), and it can schedule instance stoppage.

It should be fairly easy to modify to set a Start Time too.

Upvotes: 0

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