Reviewing playbooks and roles
Let's jump right into examining the master playbook that we created earlier to deploy Docker containers on CoreOS called ansible-coreos. The completed playbook and file, named base.yml, located in the root of the ansible-coreos directory, looks like this:
---
# This playbook deploys the ELK stack on CoreOS
- name: Bootstrap CoreOS
hosts: coreos
gather_facts: False
roles:
- defunctzombie.coreos-bootstrap
- name: Deploy ELK Stack
hosts: coreos
remote_user: core
become: false
tasks:
- name: Start etcd
service: name=etcd.service state=started
become: true
- name: Install docker-py
shell: /home/core/bin/pip install docker-py==1.9.0 docker-compose==1.8.0
- name: Pull Elasticsearch container
docker_image: name=elasticsearch
- name: Pull Kibana container
...
