Ansible Templates are a powerful tool which allows custom files can be generated based on variables. This lesson implements some examples about their implementation.
In order to understand this lesson properly, a set of steps have been designed to be implemented in the following section.
ENJOY !!!
In order to assist this laboratory implementation, a set of resources have been added:
- httpd.conf (Default Apache configuration file in Red Hat Enterprise Linux 8)
- index.html (Basic HTML document structure)
- Create an inventory file named "inventory" with a group named "myinstance" and your internal instance IP assigned included
- Create a playbook named "templates-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:- Define an array variable named "http_ports" which contains the following sequence of ports (80, 81, 8008, 8009 and 9000)
- Create a template from "httpd.conf" configuration file in order to listen ports defined in "http_ports variable" and create a virtualhost per each using as root directory
- Create a template from "index.html" file in order to include port number as body content corresponding to the virtual host port
- Install "httpd" package
- Create new folders based on port number (Example: "ansible-service-
<port>") in "/var/www/html" - Copy HTML template page named "index.html.j2" in each "/var/www/html/ansible-service-
<port>" - Copy apache configuration template named "httpd.conf.j2" to "/etc/httpd/conf/httpd.conf"
- NOTE: It is important to bear in mind that it is necessary to restart httpd service when a new package or package version is installed or configuration file modified
- Before running your playbook, run the ansible-playbook --syntax-check command to verify that its syntax is correct
- Run the playbook!
- Test the apache server
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/modules/template_module.html
- https://jinja.palletsprojects.com/en/2.10.x/
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Asier Cidon - Cloud Consultant