Examples

roles:
    - { role: etckeeper,                    tags: ['system', 'etckeeper']}

To avoid etckeeper autocommits (daily or before package manager runs) set avoid_autocommits to true:

roles:
    - { role: etckeeper,                    tags: ['system', 'etckeeper'],
        etckeeper_avoid_autocommits: true }

To send commit emails to root:

roles:
    - { role: etckeeper,                    tags: ['system', 'etckeeper'],
        etckeeper_avoid_autocommits: true,
        etckeeper_mailto: root }