Passing a list in a list to loop

Archives Ansible Project
1

Greetings,

Below is an example of a playbook to manager some docker containers. I’ve built a data structure that my tasks can loop over. The trouble is that one task attribute, published_ports requires a whole list, but when I pass is a list it only gets one element. How can I fix this?

vars:

list of images and attributes

images:

  • src: …/dns
    dest: /usr/src/
    path: /usr/src/dns
    name: my_dns
    state: present

list of containers and attributes

containers:

  • name: my_dns
    state: started
    published_ports: # <<< need to pass this list whole
  • 53
  • 53:53/udp

tasks:

  • block:

  • name: upload dockerfile and data
    copy:
    src: “{{ item.src }}”
    dest: “{{ item.dest }}”
    with_items: “{{ images }}”

  • name: build dns docker image
    docker_image:
    path: “{{ item.path }}”
    name: “{{ item.name }}”
    state: “{{ item.state }}”
    with_items: “{{ images }}”

  • name: deploy container
    docker_container:
    name: “{{ item.name }}”
    image: “{{ item.name }}”
    published_ports: “{{ item.published_ports }}” # <<< How pass whole list?
    state: “{{ item.state }}”
    with_items: “{{ containers }}”

2

Turns out published_ports can take a string too, so use:

published_ports: 53:53,53:53/udp

instead of

published_ports:

  • 53:53
  • 53:53/udp
3

It should be able to take both transparently, the argument is type ‘list’ which means that an actual list or a , separated string are both allowed as input.