Tasks : ```

hosts: web tasks:

name: Installation of Apache Package yum: name: httpd state: present update_cache: yes
name: Ensure Apache is running (and enable it at boot) service: name=httpd state=started enabled=yes

**Roles** (use to structure a list of Tasks): - Directory structure :

. ├── ansible.cfg ├── hosts └── roles └── myrole ├── defaults │ └── main.yml ├── files │ └── myfile ├── handlers │ └── main.yml ├── tasks │ └── main.yml ├── templates │ └── mytemplate.j2 └── vars └── main.yml

Handlers and Notify :

tasks:
 - name: Install Apache
   yum: name=httpd state=present
   notify: Start Apache

handlers:
 - name: Start Apache
   service: name=httpd state=started

Handlers by default get executed at the end of the playbook.

Conditionnals :

- name: Analyse 'my_file'
  shell: cat "my_file"
  register: my_file_contents

- name: Show results
  shell: echo "find <toto> pattern"
  when: my_file_contents.stdout.find('toto') != -1

Template : Jinja Templating

{% ... %} for control statements
{{ ... }} for expressions
{# ... #} for comments

Tags : Limit a playbook on tags : ansible-playbook <playbook.yml> -i ./hosts --tag <mytag>

Loops over items :

- name: Add a list of users
  user: name={{ item }} state=present
  with_items:
   - testuser1
   - testuser2
   - testuser3

Example (Installation and conf. of Apache server):

./playbook-deploy-apache.yml ```

hosts: web roles:
- { role: demo-install-apache }
- { role: demo-configure-apache }

./roles/demo-configure-apache/vars/main.yml ```

apache_listen_port: 8081 app_directory: /var/www/html app_user: apache app_group: apache


./roles/demo-configure-apache/handlers/main.yml

name: Reload Apache service: name: httpd state: reloaded


./roles/demo-install-apache/tasks/main.yml

name: Installation of Apache Package yum: name: httpd state: present update_cache: yes
name: Ensure Apache is running (and enable it at boot) service: name=httpd state=started enabled=yes


./roles/demo-configure-apache/tasks/main.yml

name: Modify permission of directory {{ app_directory }} file: dest: '{{ app_directory }}' mode: 0755 owner: '{{ app_user }}' group: '{{ app_group }}' recurse: yes
name: Modify Apache configuration lineinfile: dest: /etc/httpd/conf/httpd.conf regexp: '^Listen ' line: 'Listen {{ apache_listen_port }}' notify: Reload Apache

Getting Started

Inventory files

Hostname ranges

Variable files

Ad-Hoc commands

Playbooks

Tasks : ```

Example (Installation and conf. of Apache server):

./playbook-deploy-apache.yml ```

./roles/demo-configure-apache/vars/main.yml ```