Register EC2 alarm during instance creation

[Toby Hobson]

I am able to create an ec2 cloudwatch alarm for existing instances by using the ec2 dynamic inventory script ie.

hosts: tag_Name_Build

- name: Create CPU utilization metric alarm

    sudo: false

    local_action:

      ec2_metric_alarm

      dimensions="InstanceId"="{{ec2_id}}"

      ...

and running it as $ansible-playbook -i ec2-inventory.py add_alarms.yml

However I would really like to be able to attach these alarms when I initially create the instance. The problem I have run into is what value to use for the dimension attribute because {{ec2_id}} is not available. I'm looking for something similar to this:

- name: Provision EC2 instances

  hosts: localhost

  connection: local

  gather_facts: False

  tasks:

    - name: Provision a set of instances

      ec2:

        ...

        count_tag:

          Name: Build

        instance_tags:

          Name: Build

      register: ec2

# Attach alarms for new instances

  - name: Create CPU utilization metric alarm

    sudo: false

    local_action:

      ec2_metric_alarm

      dimensions="InstanceId"="{{ec2_id}}"

Has anyone found a solution for attaching alarms to newly created instances?

Many thanks

Toby