Deployment with Ansible

We have covered the most fundamental features of Ansible. Let's now forget, just for a little while, about Docker and configure a complete deployment step using Ansible. We will run the calculator service on one server and the Redis service on the second server.

Installing Redis

We can specify a play in the new playbook. Let's create the playbook.yml file with the following content:

---
- hosts: web1
  become: yes
  become_method: sudo
  tasks:
  - name: install Redis
    apt:
      name: redis-server
      state: present
  - name: start Redis
    service:
      name: redis-server
      state: started
  - name: copy Redis configuration
    copy:
      src: redis.conf
      dest: /etc/redis/redis.conf
    notify: restart Redis
  handlers:
  - name: restart Redis
    service:
      name: redis-server
      state: restarted

The configuration is executed on one server web1. It installs the redis-server package, copies the Redis configuration, and starts Redis. Note that each...