Road-to-DevOps/Pepiniere/Ansible/Formation/travaux-pratiques/tp-ansible-imports.md

## TP Imports

* Reprendre le TP Wordpress et découper le Playbook en plusieurs fichiers de tâches.

* Exemples de découpage pouvant être définis :
<small>

    - mariadb-install.yaml
    - mariadb-configure.yaml
    - apache-install.yaml
    - apache-configure.yaml
    - wordpress-install.yaml
    - wordpress-configure.yaml
    - test-service.yaml

</small>

* Utiliser `include_tasks` pour charger les fichiers de tâches.


`install-apache-wordpress-mariadb-imports.yaml`

<!-- .slide: data-state="medium-code" -->
```yaml
- hosts: ansible-2
  vars:
   - DB_NAME: wordpress
   - DB_USER: wordpressuser
   - DB_PASSWORD: "12345"
   - DB_HOST: "{{ hostvars['ansible-2']['ansible_ssh_host'] }}"
   - WEB_HOST: "{{ hostvars['ansible-1']['ansible_ssh_host'] }}"
  tasks:
   - include_tasks: imports/mariadb-install.yaml
   - include_tasks: imports/mariadb-wordpress-configure.yaml

- hosts: ansible-1
  vars:
   - DB_NAME: wordpress
   - DB_USER: wordpressuser
   - DB_PASSWORD: "12345"
   - DB_HOST: "{{ hostvars['ansible-2']['ansible_ssh_host'] }}"
  tasks:
   - include_tasks: imports/apache-install.yaml
   - include_tasks: imports/wordpress-install.yaml
   - include_tasks: imports/wordpress-configure.yaml
  handlers:
   # On utilise import_tasks pour que le fichier contenant
   # les handlers soit chargé dès le départ
   - import_tasks: imports/apache-handlers.yaml
```


`imports/mariadb-install.yaml`

<!-- .slide: data-state="medium-code" -->
```yaml
   - name: Installation of mariadb-server package
     yum:
       name: mariadb-server
       state: present
       update_cache: yes

   - name: Ensure mariadb-server is running (and enabled at boot)
     service:
       name: mariadb
       state: started
       enabled: yes

   - name: Allow mariadb traffic on port 3306
     firewalld:
       service: mysql
       permanent: true
       state: enabled
       immediate: yes
```


`imports/mariadb-wordpress-configure.yaml`

<!-- .slide: data-state="medium-code" -->
```yaml
   - name: Installation of MySQL-python package
     # package required to use ansible mysql modules
     yum:
       name: MySQL-python
       state: present
       update_cache: yes

   - name: Create a new database with name '{{ DB_NAME }}'
     mysql_db:
       name: '{{ DB_NAME }}'
       state: present

   - name: Create a new database user with name '{{ DB_USER }}'
     mysql_user:
       name: '{{ DB_USER }}'
       password: '{{ DB_PASSWORD }}'
       priv: '{{ DB_NAME }}.*:ALL'
       host: '{{ WEB_HOST }}'
       state: present
```


`imports/apache-install.yaml`

<!-- .slide: data-state="medium-code" -->
```yaml
- name: Installation of apache package
  dnf:
    name: httpd
    state: present
    update_cache: yes

- name: Installation of php package
  dnf:
    name: php
    state: present
    update_cache: yes

- name: Installation of php-mysqlnd package
  dnf:
    name: php-mysqlnd
    state: present
    update_cache: yes
  notify: Reload Apache

- name: Installation of wget package
  dnf:
    name: wget
    state: present
    update_cache: yes

- name: Ensure apache is running (and enabled at boot)
  service:
    name: httpd
    state: started
    enabled: yes

- name: Allow http traffic on port 80
  firewalld:
    service: http
    permanent: true
    state: enabled
    immediate: yes
```


`imports/apache-handlers.yaml`

<!-- .slide: data-state="medium-code" -->
```yaml
   - name: Reload Apache
     service:
       name: httpd
       state: restarted
```


`imports/wordpress-install.yaml`

<!-- .slide: data-state="medium-code" -->
```yaml
   - name: Download wordpress archive
     get_url:
       url: https://wordpress.org/wordpress-5.0.8.tar.gz
       dest: /var/www/html/wordpress.tar.gz
       mode: 0440

   - name: Untar wordpress archive
     unarchive:
       src: /var/www/html/wordpress.tar.gz
       dest: /var/www/html
       remote_src: true

   - name: Remove wordpress archive
     file:
       path: /var/www/html/wordpress.tar.gz
       state: absent
```


`imports/wordpress-configure.yaml`

<!-- .slide: data-state="medium-code" -->
```yaml
   - name: Create wordpress configuration file
     copy:
       src: /var/www/html/wordpress/wp-config-sample.php
       dest: /var/www/html/wordpress/wp-config.php
       remote_src: true

   - name: Update wordpress configuration file with db name
     replace:
       dest: /var/www/html/wordpress/wp-config.php
       regexp: 'database_name_here'
       replace: '{{ DB_NAME }}'

   - name: Update wordpress configuration file with user name
     replace:
       dest: /var/www/html/wordpress/wp-config.php
       regexp: 'username_here'
       replace: '{{ DB_USER }}'

   - name: Update wordpress configuration file with user password
     replace:
       dest: /var/www/html/wordpress/wp-config.php
       regexp: 'password_here'
       replace: '{{ DB_PASSWORD }}'

   - name: Update wordpress configuration file with host
     replace:
       dest: /var/www/html/wordpress/wp-config.php
       regexp: 'localhost'
       replace: '{{ DB_HOST }}'
```