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Ansible - Fundamental

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• Ansible - Fundamental
  • Ansible
    • Ansbile parameters
    • Configuration Files
    • Override Default Configuration
      • [defaults]
    • Common Command

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Ansible

Ansbile parameters

• The parameter used to define how Ansible runs playbooks
• Naming:
  • ANSIBLE_<PARAMETER_NAME>: All upper case.

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Configuration Files

• Ansible configuration file

  • defines how Ansible should behave when running playbooks, ad-hoc commands, or roles.

• By default, cf path:

  • /etc/ansible/ansible.cfg

• By default, Ansible looks for configuration files in this order (first found is used):

  • ANSIBLE_CONFIG (environment variable if set)
  • ./ansible.cfg (in the current directory)
  • ~/.ansible.cfg (in the user’s home directory)
  • /etc/ansible/ansible.cfg (system-wide default)

• If Ansible finds the above configuration, then the values defined in cf will be applied and the parameters that are not defined will be apply defautl values.

• Common Sections in cf

  • defaults
  • inventory
  • privilege_escalation
  • paramiko_connection
  • ssh_connection
  • persistent_connection
  • colors

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Override Default Configuration

• Ways to override the default configuration:

• Perssit parameters across shells ans uses

  • Create custom cf ansible.cfg within the directory of specific playbook.

• Execute a playbook using a cf rathen in the default path

ANSIBLE_CONFIG=/opt/ansible-web.cfg ansible-playbook web-playbook.yml

• to override a specific paramters for a single execution:

ANSIBLE_PARAMETER_NAME=new_value ansible-playbook playbook.yml

• Persist the throughout the shell session:

export ANSIBLE_PARAMETER_NAME=new_value
ansible-playbook playbook.yml

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[defaults]

• Defines global defaults for Ansible.

• Common Entries:

Entry	Desc
inventory	path to the default inventory file.
remote_user	default SSH user.
roles_path	path to roles.
host_key_checking	whether to check SSH host keys.
forks	number of parallel processes.

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Common Command

CMD	DESC
ansible-config list	List all configuration
ansible-config view	Show the currently active config file
ansible-config dump	Show the current settings and where they are picked up
ansible-config dump \| grep GATHERING	Show the a specific paramter settings