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Essential Ansible Commands

Essential Ansible Commands

Essential Ansible Commands

This guide contains some essential Ansible commands with their explanations for managing infrastructure efficiently.

  1. Ping all hosts to check connectivity
    ansible all -m ping
    This command checks the connection to all hosts in the inventory file.
  2. Run a command on all hosts
    ansible all -m shell -a "uptime"
    This runs the uptime command on all hosts. You can replace uptime with any command you want to run.
  3. Run a playbook
    ansible-playbook playbook.yml
    This runs the playbook.yml file against the hosts defined in the inventory.
  4. Specify a different inventory file
    ansible-playbook -i myinventory.ini playbook.yml
    This uses myinventory.ini instead of the default /etc/ansible/hosts.
  5. List hosts in the inventory
    ansible all --list-hosts
    This lists all the hosts in your inventory.
  6. Use tags in a playbook
    ansible-playbook playbook.yml --tags "mytag"
    This runs only the tasks tagged with mytag in the playbook.yml.
  7. Run playbook on specific host/group
    ansible-playbook -l webservers playbook.yml
    This runs the playbook only on hosts defined under the webservers group in the inventory.
  8. Check syntax of playbook
    ansible-playbook playbook.yml --syntax-check
    This checks for any syntax errors in your playbook.yml.
  9. Dry run (check mode)
    ansible-playbook playbook.yml --check
    This performs a dry run to see what changes would be made without actually applying them.
  10. Show output in JSON format
    ansible all -m shell -a "uptime" -o
    This command shows the output in a JSON-like format.
  11. Gather facts about hosts
    ansible all -m setup
    This gathers detailed information about all hosts, such as OS type, network interfaces, etc.
  12. Execute a playbook with a specific user
    ansible-playbook playbook.yml -u username
    This runs the playbook as the specified user (username).
  13. Run a playbook with sudo privileges
    ansible-playbook playbook.yml --become
    This runs the playbook with sudo privileges.
  14. View available roles
    ansible-galaxy list
    This lists all installed roles in Ansible.
  15. Install a role from Ansible Galaxy
    ansible-galaxy install username.role_name
    This installs a role from Ansible Galaxy. Replace username and role_name with the actual role name.
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