How to Use Ansible Custom Facts

1. How do I add custom facts in Ansible?
2. How do you use custom facts?
3. How do you use Ansible facts in playbook?
4. How do you show Ansible facts?
5. How do you access Ansible variables?
6. How do you list Ansible variables?
7. Which command is used to create a custom fact?
8. Which is a use of an external fact?
9. How do you identify puppet facts?
10. How do you stop Ansible gathering facts?
11. How do you use the host variable in Ansible?
12. What are roles in Ansible?

How do I add custom facts in Ansible?

User defined facts

1. To create custom facts, we must create /etc/ansible/facts.d on the respective managed nodes.
2. Inside the facts.d directory you can place your facts file with extension .fact.
3. The format of these facts file must be in JSON or Dictionary format.
4. The fact file must have executable permission.

How do you use custom facts?

How to Use Ansible Custom Facts

1. 1) Global facts: These facts are accessible from every host in your inventory file.
2. 2) Group facts: These facts are only accessible from a specific set of hosts or a host group.
3. 3) Host facts: These facts are only accessible from a particular host.

How do you use Ansible facts in playbook?

To access the variables from Ansible facts in the Ansible playbook, we need to use the actual name without using the ansible keyword. The gather_facts module from the Ansible playbook runs the setup module by default at the start of each playbook to gather the facts about remote hosts.

How do you show Ansible facts?

To see all available facts, add this task to a play:

1. - name: Print all available facts ansible.builtin.debug: var: ansible_facts.
2. ansible_facts['devices']['xvda']['model']
3. ansible_facts['nodename']

How do you access Ansible variables?

Begin by calling the vars keyword then call the variable name followed by the value as shown. In the playbook above, the variable name is salutations and the value is Hello world! When the playbook is run, the value of the playbook is accessed by placing the variable between curly braces as shown above.

How do you list Ansible variables?

Here is the list extracted from Ansible 1.9 documentation:

1. group_names.
2. groups.
3. inventory_hostname.
4. ansible_hostname.
5. inventory_hostname_short.
6. play_hosts.
7. delegate_to.
8. inventory_dir.

Which command is used to create a custom fact?

In Puppet, the key-value pair is known as “fact”. Each resource has its own facts and in Puppet the user has the leverage to build their own custom facts. Facter command can be used to list all the different environment variables and its associated values.

Which is a use of an external fact?

External facts provide a way to use arbitrary executables or scripts as facts, or set facts statically with structured data. With this information, you can write a custom fact in Perl, C, or a one-line text file.

How do you identify puppet facts?

To see the fact values for a node, run facter -p on the command line, or browse facts on node detail pages in the Puppet Enterprise console. You can also use the PuppetDB API to explore or build tools to search and report on your infrastructure's facts.

How do you stop Ansible gathering facts?

To mitigate this we need to disable gather facts with “gather_facts” attribute in ansible playbook. By default gather_facts attributes value is True, to disable it we need to set it as False. After updating gather_facts: False in playbook if we execute, it will skip collecting facts and directly execute tasks listed.

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.

What are roles in Ansible?

Roles provide a framework for fully independent, or interdependent collections of variables, tasks, files, templates, and modules. In Ansible, the role is the primary mechanism for breaking a playbook into multiple files. This simplifies writing complex playbooks, and it makes them easier to reuse.