This document provides an introduction to Ansible, describing it as a simple and lightweight automation tool that can be used to execute one-time tasks, perform system administration tasks, and configure servers and routers. It discusses Ansible's key features including being written in Python, being open source, and being easy to install and use. It also provides information on installing and configuring Ansible on various operating systems as well as how to use ad-hoc commands and playbooks with Ansible.

1. ANSIBLE
Configuration management tool
and ad-hoc solution

2. INTRODUCTION
• Simple automation tool
• Lightweight automation tool
• Execute one-time tasks
• Perform system administration tasks
• Configure servers and routers
• Gather information about devices

3. INTRODUCTION
• Written in Python
- easy to read and extend
• Open source
- source code on GitHub
• Easy to install and run
- get started in just a few minutes

4. INSTALL AND CONFIGURATION
• CentOS / Fedora
- enable the EPEL repository
- yum install ansible
• Ubuntu / Debian
- apt-add-repository ppa:ansible/ansible
- apt-get install ansible
• Any operating system
- create a virtualenv
- pip install ansible

5. RUNNING ANSIBLE
• How it works

6. AD-HOC COMMANDS
- Runs a command or call a module directly from
the command line, no Playbook required
ansible <inventory> <options>
ansible web –a /bin/date
ansible db -m ping
ansible web -m yum -a “name=nginx state=latest”

7. AD-HOC COMMANDS

8. PLAYBOOKS
• Written in YAML
- human-readable
• Variable definitions
• Handlers
- take action upon changes
• Reusable
- save for the future, share with colleagues, etc

9. PLAYBOOKS
• How it works
- Playbook contain plays
- Plays contain tasks
- Tasks call module
- Tasks run sequentially
- Handlers are triggered by tasks
and run once, at the end plays

10. PLAYBOOKS
• Simple playbooks
- host
- var
- task
- module
- templates
- handlers

11. PLAYBOOKS
• Ansible uses the Jinja template engine
- variable substitution
- conditionals and loops (if, for)
- filters to transform text
• Templates are just text file
- text {{ ... }} undergoes variable substitution
- text {% ... %} marks conditionals and loops
- everything else is passed through

12. PLAYBOOKS
• Best practice
- group_vars
- host_vars
- inventory
- roles
- task
- handlers
- templates
- README

13. VARIABLES
• Facts
- running OS
• Registered variables
- Values from earlier tasks
• Host declaration
- Inventory file
- host_vars & group_vars

14. VARIABLES

15. VARIABLES
• Registered variables

16. VARIABLES

17. ANSIBLE-GALAXY
• Library for roles
- https://galaxy.ansible.com/list#/roles
- More than 11.000 roles
- Not always easy to find the best role!
ansible-galaxy install author.role

18. ANSIBLE OVIRT MODULES
ovirt_auth (E) - Manage authentication
ovirt_disks (E) - Manage VM and floating disks
ovirt_host_networks (E) - Manage host networks
ovirt_host_pm (E) - Manage power management
ovirt_hosts (E) - Manage hosts in oVirt
ovirt_hosts_facts (E) - Retrieve facts about one or
more oVirt hosts
ovirt_vms (E) - Module to manage VM

19. JENKINS
Continuous Integration server.

20. WHAT IS JENKINS?
• Continuous integration and continuous delivery
• Open source
• Java
• Servlet
• More and more features with plugin

21. FEATURES
• Easy installation
• Easy configuration
• Rich plugin ecosystem
• Extensibility
• Distributed builds

22. JENKINS and ANSIBLE

23. JENKINS and ANSIBLE