Ansible play that creates Route53 records based on AutoScaling groups

0-README.md

ASG Route53 Updater

At TVbeat we run this on a cron within each of our cloudformation stacks.

R53 records look like zookeeper-staging.example.com

Requirements

ansible :) & awscli: sudo pip install awscli

EC2 IAM policy:

ec2:DescribeInstances

{"Statement":[{"Resource":["*"],"Action":["ec2:DescribeInstances"],"Effect":"Allow"}]}

autoscaling:DescribeAutoScalingGroups

{"Statement":[{"Resource":["*"],"Action":["autoscaling:DescribeAutoScalingGroups"],"Effect":"Allow"}]}

route53:*

{"Statement":[{"Resource":["*"],"Action":["route53:*"],"Effect":"Allow"}]}

asg-route53-updater.yml

---
- hosts: all
  gather_facts: true
  connection: local
  vars:
    ansible_local:
      tvbeat:
        region: "eu-west-1"
        route53_zone_name: example.com
        stack_name: "staging"
        asgs:
          zookeeper: "zookeeper-AutoScalingGroup-id"
          worker: ""
          mongo: ""
          redis: ""

  tasks:
    - name: describe ASGs
      shell: aws autoscaling describe-auto-scaling-groups --region {{ ansible_local.tvbeat.region }} --auto-scaling-group-names {{ item.value }} --query "AutoScalingGroups[].Instances[].InstanceId" --output text
      register: instance_ids
      with_dict: ansible_local.tvbeat.asgs

    - name: find instance ips
      shell: aws ec2 describe-instances --region {{ ansible_local.tvbeat.region }} --query "Reservations[].Instances[].PrivateIpAddress" --instance-ids {{ item.stdout }} --output text
      with_items: instance_ids.results
      register: instance_ips

    - name: create record set
      when: item.stdout|length > 0
      route53: >
        command=create
        zone={{ ansible_local.tvbeat.route53_zone_name }}
        record={{ item.item.item.key }}-{{ ansible_local.tvbeat.stack_name }}.{{ ansible_local.tvbeat.route53_zone_name }}
        type=A
        ttl=5
        value={{ item.stdout.split("\t")|join(",") }}
        overwrite=true
      with_items: instance_ips.results