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Ansible Snippets

Get the hosts of a dynamic ansible inventory⚑

ansible-inventory -i environments/production --graph

You can also use the --list flag to get more info of the hosts.

Speed up the stat module⚑

The stat module calculates the checksum and the md5 of the file in order to get the required data. If you just want to check if the file exists use:

- name: Verify swapfile status
  stat:
    path: "{{ common_swapfile_location }}"
    get_checksum: no
    get_md5: no
    get_mime: no
    get_attributes: no
  register: swap_status
  changed_when: not swap_status.stat.exists

Stop running docker containers⚑

- name: Get running containers
  docker_host_info:
    containers: yes
  register: docker_info

- name: Stop running containers
  docker_container:
    name: "{{ item }}"
    state: stopped
  loop: "{{ docker_info.containers | map(attribute='Id') | list }}"

Moving a file remotely⚑

Funnily enough, you can't without a command. You could use the copy module with:

- name: Copy files from foo to bar
  copy:
    remote_src: True
    src: /path/to/foo
    dest: /path/to/bar

- name: Remove old files foo
  file: path=/path/to/foo state=absent

But that doesn't move, it copies and removes, which is not the same.

To make the command idempotent you can use a stat task before.

- name: stat foo
  stat: path=/path/to/foo
  register: foo_stat

- name: Move foo to bar
  command: mv /path/to/foo /path/to/bar
  when: foo_stat.stat.exists
Last update: 2023-03-23