Ansible 202

Oct 14, 20160 likes520 views

This document discusses Ansible, an automation tool. It defines Ansible as a simple yet powerful automation engine that uses YAML syntax. It does not require agents on servers and uses SSH without open firewall ports. The document also summarizes key Ansible concepts like inventory, modules, facts, playbooks, tasks, tags, roles and Ansible Galaxy. It provides examples of using Ansible Vault to encrypt sensitive files and configuring Ansible through ansible.cfg.

Ansible 202
(because i hate odd numbers)

$whoami
● DevOps Engineer @ Jampp
● Whisky enthusiast
● Amateur golfer
● Nardoz’s newbie
@sebamontini

What is Ansible?
Ansible is a very simple (yet powerful) automation engine.
● Simple: Ansible uses a clear (readable) YAML sintax.
● Fast: easy to learn, easy to setup.
● Efficient: No agent on you servers.
● Secure: No open ports on your firewalls (SSH).
@sebamontini

Glosary
Inventory: Lists of Hosts, Variables and Groups.
Modules: The units of work that Ansible ships out to remote
hosts.
Facts: Things that are discovered about remote nodes.
Playbooks: List of plays (mapping of hosts and tasks).
Tasks: set of actions (module+args) to be executed.
@sebamontini

$Tags @sebamontini --- tasks: - yum: name={{ item }} state=installed with_items: - httpd - memcached tags: - packages - template: src=templates/src.j2 dest=/etc/foo.conf tags: - config - deploy $ansible-playbook myapp.yml --tags config,deploy$

Roles
@sebamontini
roles/
myRole/ # this hierarchy represents a "role"
tasks/ #
main.yml # <-- tasks file can include smaller files if warranted
handlers/ #
main.yml # <-- handlers file
templates/ # <-- files for use with the template resource
ntp.conf.j2 # <------- templates end in .j2
files/ #
bar.txt # <-- files for use with the copy resource
foo.sh # <-- script files for use with the script resource
vars/ #
main.yml # <-- variables associated with this role
defaults/ #
main.yml # <-- default lower priority variables for this role
meta/ #
main.yml # <-- role dependencies

Ansible Galaxy
@sebamontini
$ansible-galaxy install -r requirements.yml
---
- src: torian.python
name: python
path: roles-galaxy/
version: 1.0.0
- src: bennojoy.memcached
name: memcached
path: roles-galaxy
- src: https://github.com/torian/ansible-role-phantomjs
name: phantomjs
path: roles-galaxy/

ansible.cfg
[defaults]
inventory = inventory/ec2.py
roles_path = roles:roles-galaxy
retry_files_enabled = True
retry_files_save_path = .ansible-retry
$ansible-playbook <playbook.yml> -l @<playbook>.retry
@sebamontini

$ansible-vault Vault is a feature of ansible that allows keeping sensitive data such as passwords or keys in encrypted files. roles/aliens ├── tasks │ └── main.yml └── vars └── spoilers.yml $ ansible-playbook playbooks/movies.yml --vault-password-file ~/.vault_pass.txt @sebamontini --- - include_vars: spoilers.yml - name: Put the spoiler in the tmp directory. copy: content="{{spoiler_text}}" dest=/tmp/spoiler_text.txt $ ansible-vault encrypt roles/aliens/vars/spoilers.yml --vault-password-file ~/.vault_pass.txt $cat playbooks/movies.yml --- - hosts: all roles: - { role: aliens }$

We’re hiring !
http://jampp.com/jobs.php
@sebamontini

Thanks
sebastian@jampp.com
@sebamontini
github.com/sebamontini

Ansible is a simple yet powerful automation engine that uses YAML syntax. It is fast, efficient, and secure as it does not require agents or open ports on servers. Ansible uses inventory to list hosts and groups, modules to define units of work, facts to discover node details, and playbooks to define lists of plays and tasks. Playbooks can use tags to selectively run certain tasks. Roles help organize and reuse groups of tasks. Galaxy allows installing roles from online repositories. Variables precedence determines which value is used. Vault encrypts sensitive files.

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Ansible 202

1. Ansible 202 (because i hate odd numbers)

2. $whoami ● DevOps Engineer @ Jampp ● Whisky enthusiast ● Amateur golfer ● Nardoz’s newbie @sebamontini

3. What is Ansible? Ansible is a very simple (yet powerful) automation engine. ● Simple: Ansible uses a clear (readable) YAML sintax. ● Fast: easy to learn, easy to setup. ● Efficient: No agent on you servers. ● Secure: No open ports on your firewalls (SSH). @sebamontini

4. Glosary Inventory: Lists of Hosts, Variables and Groups. Modules: The units of work that Ansible ships out to remote hosts. Facts: Things that are discovered about remote nodes. Playbooks: List of plays (mapping of hosts and tasks). Tasks: set of actions (module+args) to be executed. @sebamontini

5. Tags @sebamontini --- tasks: - yum: name={{ item }} state=installed with_items: - httpd - memcached tags: - packages - template: src=templates/src.j2 dest=/etc/foo.conf tags: - config - deploy $ansible-playbook myapp.yml --tags config,deploy

6. Roles @sebamontini roles/ myRole/ # this hierarchy represents a "role" tasks/ # main.yml # <-- tasks file can include smaller files if warranted handlers/ # main.yml # <-- handlers file templates/ # <-- files for use with the template resource ntp.conf.j2 # <------- templates end in .j2 files/ # bar.txt # <-- files for use with the copy resource foo.sh # <-- script files for use with the script resource vars/ # main.yml # <-- variables associated with this role defaults/ # main.yml # <-- default lower priority variables for this role meta/ # main.yml # <-- role dependencies

7. Ansible Galaxy @sebamontini $ansible-galaxy install -r requirements.yml --- - src: torian.python name: python path: roles-galaxy/ version: 1.0.0 - src: bennojoy.memcached name: memcached path: roles-galaxy - src: https://github.com/torian/ansible-role-phantomjs name: phantomjs path: roles-galaxy/

8. ansible.cfg [defaults] inventory = inventory/ec2.py roles_path = roles:roles-galaxy retry_files_enabled = True retry_files_save_path = .ansible-retry $ansible-playbook <playbook.yml> -l @<playbook>.retry @sebamontini

9. ansible-vault Vault is a feature of ansible that allows keeping sensitive data such as passwords or keys in encrypted files. roles/aliens ├── tasks │ └── main.yml └── vars └── spoilers.yml $ ansible-playbook playbooks/movies.yml --vault-password-file ~/.vault_pass.txt @sebamontini --- - include_vars: spoilers.yml - name: Put the spoiler in the tmp directory. copy: content="{{spoiler_text}}" dest=/tmp/spoiler_text.txt $ ansible-vault encrypt roles/aliens/vars/spoilers.yml --vault-password-file ~/.vault_pass.txt $cat playbooks/movies.yml --- - hosts: all roles: - { role: aliens }

10. We’re hiring ! http://jampp.com/jobs.php @sebamontini

11. Thanks [email protected] @sebamontini github.com/sebamontini

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