scale-event-trigger

scale-event-trigger

Runs a command when EC2 instances that match the given tags change.

Specify tags to limit instances that are checked, multiple tags can be used. You must specify at least one tag.

./scale-event-trigger Service:web Environment:live

Set the command to run with the --command flag:

./scale-event-trigger --command="command to run here"

scale-event-trigger will check the EC2 instances once every 60 seconds, you can change this as follows:

./scale-event-trigger --frequency=120

Authentication

AWS access key and secret key can be added as environment variables, using either AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY and AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY. If these are not available then IAM credentials for the instance will be checked.

Building

Build a binary by running:

go build scale-event-trigger.go