Beginner's Tutorial - Ansible Playbooks, Variables, and Inventory

1. How do I use Ansible playbook with inventory?
2. How do you pass variables in Ansible playbook?
3. How do I use a playbook in Ansible?
4. What is Ansible playbook used for?
5. How do you declare variables in Ansible inventory?
6. How do you send an inventory file in Ansible?
7. How can I pass variable to Ansible playbook in the command line?
8. How do you use the host variable in Ansible?
9. How do you use Ansible variables?
10. How do I run a role in Ansible?
11. How do I pass Ansible playbook username and password?
12. What is inventory file in Ansible?

How do I use Ansible playbook with inventory?

How To Set Up Ansible Inventories

1. Step 1 — Creating a Custom Inventory File. ...
2. Step 2 — Organizing Servers Into Groups and Subgroups. ...
3. Step 3 — Setting Up Host Aliases. ...
4. Step 4 — Setting Up Host Variables. ...
5. Step 5 — Using Patterns to Target Execution of Commands and Playbooks.

How do you pass variables in Ansible playbook?

It is possible to set variables at the command line using the –extra-vars (or -e) argument. Variables can be defined using a single quoted string (containing one or more variables) using one of the formats below. If you are passing variables from a file, you need a second –extra-vars flag to pass variables.

How do I use a playbook in Ansible?

Run Your First Command and Playbook

1. Prerequisites.
2. Install Ansible.
3. Establish a manual connection to a managed node.
4. Run your first network Ansible command.
5. Create and run your first network Ansible Playbook.
6. Gathering facts from network devices.

What is Ansible playbook used for?

An Ansible playbook is an organized unit of scripts that defines work for a server configuration managed by the automation tool Ansible. Ansible is a configuration management tool that automates the configuration of multiple servers by the use of Ansible playbooks.

How do you declare variables in Ansible inventory?

Host and Group variables

In a host variable file, the variable applier only to one host system in the inventory file. The host variable file is usually stored in the host_vars directory which is usually specified in /etc/ansible/ path. The second section can be defined as a file in the group_vars directory as shown.

How do you send an inventory file in Ansible?

Once your inventory is defined, you use patterns to select the hosts or groups you want Ansible to run against. The default location for inventory is a file called /etc/ansible/hosts . You can specify a different inventory file at the command line using the -i <path> option.

How can I pass variable to Ansible playbook in the command line?

Pass variable to ansible playbook in the command line

using ansible '– – exra-vars' tag or '-e' tag we can pass the ansible variable to ansible playbook in the command line.

How do you use the host variable in Ansible?

This magic variable is used to access information about other hosts. hostvars is a hash with inventory hostnames as keys. To access fields of each host, use hostvars['test-1'] , hostvars['test2-1'] , etc.

How do you use Ansible variables?

To define a variable in a playbook, simply use the keyword vars before writing your variables with indentation. To access the value of the variable, place it between the double curly braces enclosed with quotation marks. In the above playbook, the greeting variable is substituted by the value Hello world!

How do I run a role in Ansible?

There is no way to directly execute a role. Roles have no explicit setting for which host the role will apply to. Top-level playbooks are the bridge holding the hosts from your inventory file to roles that should be applied to those hosts.

How do I pass Ansible playbook username and password?

If the remote user needs to provide a password in order to run sudo commands, you can include the option --ask-become-pass to your Ansible command. This will prompt you to provide the remote user sudo password: ansible all -m ping --ask-become-pass.

What is inventory file in Ansible?

The Ansible inventory file defines the hosts and groups of hosts upon which commands, modules, and tasks in a playbook operate. The file can be in one of many formats depending on your Ansible environment and plugins. ... The inventory file can list individual hosts or user-defined groups of hosts.