How to connect docker nodes with ansible master

Question

Hi Guys,

I am new to Ansible. I want to connect docker nodes with an Ansible master node. How can I do that?

Answer 1

Hi@akhtar,

You need a running container first, and you'll need to add the hostname to Ansible's inventory. One way to do it is to write an initial play that runs a container using the docker module and then uses the add_host module to add to the inventory. You can see the below example.

- name: start up a docker container
  hosts: localhost
  vars:
    base_image: ubuntu
    docker_hostname: webcontainer
  tasks:
    - name: start up a docker container by running bash
      local_action: docker image={{ base_image }} name={{ docker_hostname }} detach=yes tty=yes command=bash
    - name: add the host
      add_host: name={{ docker_hostname }}
- name: configure the web container
  hosts: webcontainer
  connection: docker
  tasks:
   - ...