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harshalbhakta/ansible-playbook-example.yml

Last active September 26, 2020 15:55
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Ansible Cheatsheet
Raw
ansible-playbook-example.yml
---
- hosts: all
become: true
vars:
package: vim # Deifines a global variables that can be used across the playbook
packages: [ 'vim', 'git', 'curl' ] # Stor array in a variable
doc_root: /var/www/example
tasks:
# Installing a single package
- name: Install a single Package
apt: name={{ package }} state=latest # apt is Ansible's builtin module.
# Installing multiple packages using a loop
- name: Install Packages
apt: name={{ item }} state=latest
with_items: # Loop with multiple items. Reference each with {{ item }}
- vim
- git
- curl
# Conditionally execute a task using when
- name: Shutdown Debian Based Systems
command: /sbin/shutdown -t now
when: ansible_os_family == "Debian"
# Conditionally use result of one task in other task using register
- name: Check if PHP is installed
register: php_installed # Store resutlt of task in a variable
command: php -v
ignore_errors: true # Continue executing other tasks even if this task fails
- name: This task is only executed if PHP is installed
debug: var=php_install # debug: var is used to print content of variable
when: php_installed|success # Use variable from previous task to conditionally execute this task
- name: This task is only executed if PHP is NOT installed
debug: msg='PHP is NOT installed' # debug: msg us used to print a string
when: php_installed|failed
# Example task showing how to use templates
- name: Change default Apache virtual host
template: # Template module is used to create a file using a template
src: ansible-template-example.tpl # doc_root variable is available in this file
# Triggering handler via notify
- name: Change default Apache virtual host
template:
src: vhost.tpl
dest: /etc/apache2/sites-available/000-default.conf
notify: restart apache
dest: /etc/apache2/sites-available/000-default.conf
# Handlers can only to be triggered via notify in tasks. Handlers can also be placed in separate files
# Handlers trigger state change in services (restart or a stop)
handlers:
- name: restart apache
service: name=apache2 state=restarted
- name: other handler
service: name=other state=restarted
Raw
ansible-template-example.tpl
<!-- doc_root is a replacable variable -->
<VirtualHost *:80>
ServerAdmin webmaster@localhost
DocumentRoot {{ doc_root }}
<Directory {{ doc_root }}>
AllowOverride All
Require all granted
</Directory>
</VirtualHost>
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