Ansible basics workshop
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The document provides a quick guide to installing Ansible and its main features, including agentless operation, security, and easy deployment. It discusses key concepts such as inventory, modules, variables, and tasks, along with the toolset used for running commands and playbooks. Additionally, it includes details about a workshop for installing a LAMP stack and an NTP server, with associated time estimates and resources.
Ansible basics workshop
- 1. Ansible in 40 minutes
- 2. Installation ● If you do not have ansible installed yet, please do it now: http://docs.ansible.com/ansible/intro_installation .html#installing-the-control-machine ● We will need the git, too. ● It should be included on USB stick in virtual machine.
- 3. Main features ● Agentless ● Secure ● Provisioning AND deployment ● Easy to start ● Data driven ● Idempotent
- 4. Key concepts ● Inventory – List of managed computers, can be grouped. – Default in /etc/ansible/hosts. – May be dynamically generated. ● Module – Basic work units. – Plenty of them (hundreds) available. – Template, copy, user, ... – http://docs.ansible.com/ansible/list_of_all_modules.html
- 5. Key concepts (2) ● Variables – Defined on multiple levels (host, group, inventory). – Used for conditionals and in templates. ● Facts – Special variables taken from server (hostname, date and time, networking setup, …). – ansible -m setup localhost
- 6. Key concepts (3) ● Task – One task do one thing (usually it is module invocation). ● Play – Set of tasks that run on group of computers. ● Playbook – Bunch of plays in one file. ● Role – Encapsulate set of tasks, variables, templates, files together.
- 7. Toolset ● ansible – Can run ad-hoc commands. ● ansible-playbook – Run a playbooks (what a coincidence!). ● ansible-galaxy – Download roles from other ansible users. ● ansible-vault – Can encrypt variables, protect passwords, etc.
- 8. Workshop! ● Install full HA load balanced LAMP stack with replicated mysql. ● Time: 4 hours ● Probability I will be dragged away by force: High ● It was tempting to see how long I`ll be able to speak :).
- 9. Workshop! ● Install ntp server ● Time: 30 minutes ● Probability I will be dragged away by force: Low ● Maybe boring, but hey, we have to start somewhere!
- 10. Install ntp (in playbook) ● Get playbook: git clone https://github.com/davidkarban/devconfcz2016_ ntp_playbook.git
- 11. Install ntp (thru role) ● Install role: sudo ansible-galaxy install davidkarban.devconfcz2016_ntp_role