Ansible

Configuration

List all current configs:
```
  ansible-config list
```
Dump current settings:
```
  ansible-config dump
```
Dump current settings different from the defaults:
```
  ansible-config dump --only-changed
```
Disply current config file:
```
  ansible-config view
```

Facts

Gather facts about remote host ¹:

  ansible --module-name setup <hostname>

Commands

Run a command on a specific host ²:

  ansible --module-name shell --args 'ls -l /etc' <hostname>

Playbook

Run playbook on all hosts:
```
  ansible-playbook site.yml
```
Run playbook in check-mode ³:
```
  ansible-playbook site.yml --check
```
Run playbook in step-by-step ⁴:
```
  ansible-playbook site.yml --step
```

Run playbook for a specific host:

  ansible-playbook site.yml --limit=<hostname>

Run playbook for our local host:

  ansible-playbook site.yml --limit=<hostname> --connection=local

Run only specific tags from playbook ⁵:

  ansible-playbook site.yml --tags 'configuration,packages'

Skip specific tags from playbook:

  ansible-playbook site.yml --skip-tags 'install,notification'

Examples

Set a variable based on a condition ⁶:

  - name: Set DPKG architecture
    set_fact:
      dpkg_arch: "{{ 'amd64' if ansible_architecture == 'x86_64' else ansible_architecture }}"

Use a variable as the name of another variable ⁷:

  - name: Install package for architecture
    apt:
      deb: '{{ item }}'
      state: present
    with_items: '{{ packages[ansible_architecture] }}'

Use find to list files and use them on another task ⁸:

  - name: Find currently installed docs
    find:
      path: /usr/share/doc
      recurse: True
      excludes: 'copyright'
    register: doc
  - name: Remove found docs
    file:
      path: '{{ item.path }}'
      state: absent
    with_items: '{{ doc.files }}'
    when: 'doc.files is defined and doc.files|length > 0'

Extract downloaded package and symlink *.sh files ⁹:

  - name: Download scripts
    unarchive:
      src: https://github.com/ruanyf/simple-bash-scripts/archive/master.tar.gz
      dest: /opt/scripts/
      extra_opts:
        - --strip=1
      remote_src: True
      list_files: True
    register: unpack
  - name: Create symlinks to scripts
    file:
      src: '/opt/scripts/{{ item }}'
      dest: '/usr/local/bin/{{ item }}'
      state: link
    with_items: "{{ unpack.files | select('match', '^.*sh$') | list }}"