Ansible Roles lesson is one of the most important lesson in this training. It is important to take the time required in order to understand how system roles work and how ansible galaxy repository helps users accelerate ansible procedures implementation.
In order to understand this lesson properly, a set of steps have been designed to be implemented in the following section.
ENJOY !!!
- Create an inventory file named "inventory" with a group named "myinstance" and your internal instance IP assigned included
- Search and Install Nginx official role located on Ansible Galaxy
- Install rhel-system-roles
- Create a folder named "roles" to locate custom roles
- Create a custom role named "mariadb" which has to implement the following tasks:
- Install mariadb-server package
- Start and enable mysqld service
- Create a database defined in "mysql_database" (* "testroles01" by default)
- Include a tasks file named "create_mariadb_user.yml" located in tasks folder. It is necessary to import this task file as many times as the number of users defined in an array variable named "mysql_users" (* At least "test01" by default) using a loop. Rename the loop var using loop controls. Regarding this tasks file, it has to perform the following tasks:
- Create a database named after the user
- Add user with password "password01" and full privileges to both the database named after said user and to "testroles01" database, from
<myinstance_ip>
- Create a playbook named "roles-playbook.yml" using "myinstance" as a hosts parameter and
<studentxx>as a user. The playbook should use tasks to ensure that the following conditions are met on the managed hosts:- Execute custom role named "mariadb" with an array var named "mysql_users" which the following values: test01, test02, test03
- Execute nginx galaxy role
- Execute timesync rhel-system-role in order to configure "time.google.com" as NTP server
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Before running your playbook, run the ansible-playbook --syntax-check command to verify that its syntax is correct -
Run the playbook! -
Test
For more information, please visit:
- https://docs.ansible.com/ansible/latest/user_guide/playbooks.html
- https://docs.ansible.com/ansible/latest/modules/modules_by_category.html
- https://docs.ansible.com/ansible/latest/user_guide/playbooks_intro.html
- https://docs.ansible.com/ansible/latest/user_guide/playbooks_reuse_roles.html
- https://docs.ansible.com/ansible/latest/modules/import_tasks_module.html
- https://galaxy.ansible.com
- https://github.com/linux-system-roles/timesync
- https://docs.ansible.com/ansible/latest/user_guide/playbooks_loops.html
BSD
Asier Cidon - Cloud Consultant