Tech Tutorial: Run Playbooks with Automation Content Navigator #
Introduction #
In the realm of automation, staying updated with the latest tools and modules is crucial for enhancing efficiency and embracing best practices. Ansible, a popular open-source automation tool, continuously evolves, and its modules are frequently updated or newly introduced through Ansible Content Collections. This tutorial focuses on how you can leverage the Automation Content Navigator to discover new modules within these collections and effectively use them in your automation scripts. This skill is particularly vital for candidates preparing for the Red Hat Certified Engineer (RHCE) exam, focusing on RHEL-centric commands and practices.
Prerequisites #
Before proceeding with this tutorial, ensure you have the following:
- A Red Hat Enterprise Linux (RHEL) system, version 8 or later.
- Ansible installed on your RHEL system.
- Access to the internet to download necessary collections.
Step-by-Step Guide #
Step 1: Setting Up Your Environment #
First, ensure that your Ansible environment is properly set up on your RHEL machine. Install Ansible using the following command:
sudo dnf install ansible
Step 2: Discovering Ansible Collections #
Ansible Collections are a distribution format for Ansible content that can include playbooks, roles, modules, and plugins. To find new modules, you first need to explore available collections. You can search for collections from the command line using the following command:
ansible-galaxy collection search keyword
Replace keyword
with a relevant term. For example, to search for collections related to Apache, you might use:
ansible-galaxy collection search apache
Step 3: Installing a Collection #
Once you identify a collection, you can install it using the following command:
ansible-galaxy collection install namespace.collection_name
For instance, to install the Apache content collection from the earlier search, you might use:
ansible-galaxy collection install apache.httpd
Step 4: Exploring Modules in a Collection #
After installing the collection, you can list all modules in that collection:
ansible-doc -l -t module namespace.collection_name.*
For example:
ansible-doc -l -t module apache.httpd.*
This command will list all modules within the apache.httpd
collection.
Step 5: Using a Module in a Playbook #
Once you have the list of modules, you can start using them in your playbooks. Here’s a simple example of using a module from the apache.httpd collection to ensure that the Apache service is running on your server:
---
- name: Ensure Apache is Running
hosts: all
tasks:
- name: Install Apache
ansible.builtin.yum:
name: httpd
state: present
- name: Start and enable Apache
apache.httpd.httpd_service:
state: started
enabled: yes
Save this as ensure_apache_running.yml
and run the playbook using:
ansible-playbook ensure_apache_running.yml
Detailed Code Examples #
Let’s consider a more complex scenario where you need to configure virtual hosts on your Apache server using the apache.httpd
collection.
---
- name: Configure Apache Virtual Hosts
hosts: web_servers
become: yes
tasks:
- name: Install Apache
ansible.builtin.yum:
name: httpd
state: present
- name: Configure Virtual Host
apache.httpd.httpd_vhost:
server_name: "example.com"
document_root: "/var/www/html/example.com"
state: present
Run this playbook as you did with the previous example.
Conclusion #
Using Automation Content Navigator to explore and utilize new modules in Ansible Collections can significantly streamline your automation tasks and ensure your systems are managed efficiently and in accordance with the latest standards. This practice not only prepares you for the RHCE exam but also enhances your capabilities as a system administrator or a DevOps engineer working within RHEL environments.
By staying updated with the latest collections and modules, you can ensure your automation scripts are robust, maintainable, and scalable.