Using ansible-doc to view help files
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In this lesson, we'll explore how to use the ansible-doc command to access and understand the documentation of Ansible modules and plugins. This is an invaluable tool for any Ansible user, as it provides quick and easy access to the specific usage, parameters, and examples for modules and plugins directly from the command line.
The ansible-doc Command
What is ansible-doc?
ansible-doc is a command-line utility included with Ansible that allows you to view documentation about modules and plugins. This documentation includes details about what the module or plugin does, the parameters it accepts, the return values it produces, and often includes practical examples.
Benefits of ansible-doc
Using ansible-doc
Viewing Documentation for a Module
To view documentation for a specific module, use the following command:
ansible-doc <module_name>For example, to view documentation for the file module:
ansible-doc fileThis will display detailed information about the file module, including its purpose, parameters, and return values.
Searching for Modules
If you're not sure about the exact name of a module, you can search for it using a keyword. For example, use the code below to see all Windows related modules:
ansible-doc -l | grep windowsThis command lists all modules (-l) and then filters the results using grep for the specified keyword.
We can also use ansible-doc's built-in filtering which will filter by namespace:
ansible-doc -l ansible.windowsViewing Examples
Many ansible-doc entries include practical examples. These can be extremely useful as starting points for writing your own tasks or playbooks. To access these, simply scroll through the module's documentation; examples are usually found towards the end of the help document.
Practical Exercise
Conclusion
Understanding how to use ansible-doc is a key skill for efficient Ansible playbook development. It not only saves time but also enhances your understanding of the wide range of modules and their capabilities, enabling you to write more effective and efficient Ansible code.
Remember, the best way to learn is by doing. So, try out the ansible-doc command with different modules and familiarize yourself with its capabilities!
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