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How do you pass variables in Ansible playbook?
To pass a value to nodes, use the –extra-vars or -e option while running the Ansible playbook, as seen below. This ensures you avoid accidental running of the playbook against hardcoded hosts.
Where are Ansible variables set?
Where to set variables. You can define variables in a variety of places, such as in inventory, in playbooks, in reusable files, in roles, and at the command line. Ansible loads every possible variable it finds, then chooses the variable to apply based on variable precedence rules.
How do I access shell environment variables in Ansible?
You can access the environment variables available on the local server via the ‘lookup’ plugins, which allow you to access the system data, and ‘env’ plugin which is written for accessing the environment variables. Suppose we need to print the value of the ‘HOME’ environment variable.
What are different types of variables in Ansible?
The types of variables that Ansible supports are String , Numbers , Float , List , Dictionary , and Boolean .
Which of the following command is used to access the list of Ansible variables?
There are 3 sources of variables in Ansible:
- Variables gathered from facts. You can get them by running command: ansible -m setup hostname.
- But obviously you know what they are.
How to access inventory host variable in Ansible playbook?
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. ansible_ssh_host is deprecated in favor of ansible_host since 2.0.
Can you read variables from a template in Ansible?
Inside a template you automatically have access to all variables that are in scope for a host. Actually it’s more than that – you can also read variables about other hosts. We’ll show how to do that in a bit. ansible allows Jinja2 loops and conditionals in templates, but in playbooks, we do not use them.
How to extract the value of hostvars in Ansible?
In this line, first of all, Ansible extracts the value of hostvars, since it is enclosed with two brackets. Secondly, it tries to find a variable whose name is the value of hostvars, since var parameter expects a variable name directly.
Where are host and group variables stored in Ansible?
This is where the host and group variable files come in. 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.