Amazon EventBridge Schedules: notes and tips

This note was created on 2024-03-20
This note was last edited on 2024-03-20

=== Scale out / scale in ECS service using Scheduler (via AWS Console) ===
1. Go to Amazon EventBridge, open Schedules and start creating one;
2. Set name, schedule pattern;
3. For "Target API" choose "All APIs", select Amazon ECS and find "UpdateService";
4. As input JSON object, use the following:
   ~~~
   {
      "Cluster": "*YourClusterName*",
      "Service": "*YourServiceName*",
      "DesiredCount": N
   }
   ~~~
   You can use any number as the DesiredCount. "0" disables the service.
5. On the next page, select a role with permissions to update your service. Also, check any other options, such as retry policy and action after schedule completion.
6. Done.
Note: you can also check if it's working by using CloudTrail. Lookup attributes should be "Event source: ecs.amazonaws.com".