# Ansible

## List all tags

```shell
ansible-playbook -i host.targets -v site.yml --list-tags
```

## Start at a specific task (life savior)

```shell
ansible-playbook -i host.targets -v site.yml --start-at-task "The audacious task"
```

## List hosts

```shell
ansible-playbook -i host.targets -v site.yml --list-hosts
```

## Limit hosts

```shell
ansible-playbook -i host.targets -v site.yml --limit hostname
```

## Jinja2, templates & carriage return

To tell Jinja2 to not mess with carriage return in templates add

```jinja
#jinja2: trim_blocks:False
---
```

at the top of the template file

## Import vs include (kudos @href)

If you want to exec a sets of tasks when a condition is true, use
import_tasks.

```yaml
- name: Include init tasks
  import_tasks: init.yml
  tags:
    - init
  when: proof.stat.exists == False
```

`ìnclude_tasks` will add all tasks to play run, even if the when condition is
false.

## Exec task(s) if a specific service is found

```yaml
- name: Is Docker running ?
  service_facts:

- name: Push Telegraf docker input config if needed
  template:
    src: inputs/input.docker.conf.j2
    dest: /etc/telegraf/telegraf.d/input.docker.conf
  notify: reload telegraf
  when: "'docker' in services"
```