Playbook Keywords がちょっと分かり難いので表にまとめてみた。
- Jekyll 用 docker-compose.yml
共通して使えるもの
|  | Play | Task | Block | Role | 
| any_errors_fatal | ○ | ○ | ○ | ○ | 
| become | ○ | ○ | ○ | ○ | 
| become_flags | ○ | ○ | ○ | ○ | 
| become_method | ○ | ○ | ○ | ○ | 
| become_user | ○ | ○ | ○ | ○ | 
| check_mode | ○ | ○ | ○ | ○ | 
| connection | ○ | ○ | ○ | ○ | 
| debugger | ○ | ○ | ○ | ○ | 
| diff | ○ | ○ | ○ | ○ | 
| environment | ○ | ○ | ○ | ○ | 
| ignore_errors | ○ | ○ | ○ | ○ | 
| ignore_unreachable | ○ | ○ | ○ | ○ | 
| module_defaults | ○ | ○ | ○ | ○ | 
| name | ○ | ○ | ○ | ○ | 
| no_log | ○ | ○ | ○ | ○ | 
| port | ○ | ○ | ○ | ○ | 
| remote_user | ○ | ○ | ○ | ○ | 
| run_once | ○ | ○ | ○ | ○ | 
| tags | ○ | ○ | ○ | ○ | 
| throttle | ○ | ○ | ○ | ○ | 
| vars | ○ | ○ | ○ | ○ | 
| connections | ○ | ○ | ○ | ○ | 
| timeout | ○ | ○ | ○ | ○ | 
Play以外で使えるもの
|  | Play | Task | Block | Role | 
| delegate_facts |  | ○ | ○ | ○ | 
| delegate_to |  | ○ | ○ | ○ | 
| when |  | ○ | ○ | ○ | 
Playでのみ使えるもの
|  | Play | Task | Block | Role | 
| fact_path | ○ |  |  |  | 
| force_handlers | ○ |  |  |  | 
| gather_facts | ○ |  |  |  | 
| gather_subset | ○ |  |  |  | 
| gather_timeout | ○ |  |  |  | 
| handlers | ○ |  |  |  | 
| hosts | ○ |  |  |  | 
| max_fail_percentage | ○ |  |  |  | 
| order | ○ |  |  |  | 
| post_tasks | ○ |  |  |  | 
| pre_tasks | ○ |  |  |  | 
| roles | ○ |  |  |  | 
| serial | ○ |  |  |  | 
| strategy | ○ |  |  |  | 
| tasks | ○ |  |  |  | 
| vars_files | ○ |  |  |  | 
| vars_prompt | ○ |  |  |  | 
Taskでのみ使えるもの
|  | Play | Task | Block | Role | 
| action |  | ○ |  |  | 
| args |  | ○ |  |  | 
| async |  | ○ |  |  | 
| changed_when |  | ○ |  |  | 
| delay |  | ○ |  |  | 
| failed_when |  | ○ |  |  | 
| local_actioln |  | ○ |  |  | 
| loop |  | ○ |  |  | 
| loop_control |  | ○ |  |  | 
| notify |  | ○ |  |  | 
| poll |  | ○ |  |  | 
| register |  | ○ |  |  | 
| retries |  | ○ |  |  | 
| until |  | ○ |  |  | 
| with_<lookup> |  | ○ |  |  | 
Blockでのみ使えるもの
|  | Play | Task | Block | Role | 
| always |  |  | ○ |  | 
| rescue |  |  | ○ |  |