docker 守护进程开始使用 ansible

Question

I am working on ansible script for start docker damon, docker container, docker exec After start docker container with in the docker container i need to start some services.

I have installed docker engine, configured and working with some docker container in remote machines. i have used to start docker daemon with specific path, because i need to store my volumes and containers with in path.

 $docker daemon -g /test/docker

My issue is when start the docker daemon its started, but not go to next process. via ansible. still running docker daemon.

  ---
  - hosts: webservers
    remote_user: root

   # Apache Subversion   dnf -y install python-pip

    tasks:

      - name: Start Docker Deamon
        shell: docker -d -g /test/docker 
        become: yes
        become_user: root

      - name: Start testing docker machine
        command: docker start testing
        async: True
        poll: 0

I follow async to start the process ,but its not working for me,

Suggest me After start docker daemon, How to run next process.

Answer 1

In order to start the docker daemon you should use the ansible service module :

- name: Ensure docker deamon is running
  service:
    name: docker
    state: started
  become: true

any docker daemon customisation should be placed in /etc/docker/daemon.json as described in official documentation . in your case the file would look like:

{
   "graph": "/test/docker"
}

In order to interact with containers, use the ansible docker_container module :

- name: Ensure My docker container is running
  docker_container:
    name: testing
    image: busybox
    state: started
  become: true

Try to avoid doing anything in ansible using the shell module, since it can cause headaches down the line.

Answer 2

You can also start Docker and other services automatically when booting the machine. For that you can use the systemd module in Ansible like this:

- name: Enable docker.service
  systemd:
    name: docker.service
    daemon_reload: true
    enabled: true

- name: Enable containerd.service
  systemd:
    name: containerd.service
    daemon_reload: true
    enabled: true

Reference: here