@installdoc/ansible-gas-station/roles/virtualization/docker/tasks/tls-Linux.yml

An Ansible playbook that provisions your network with software from GitHub Awesome lists, developed with disaster recovery in mind ⛽🔥🤤

---
- name: Install OpenSSL
  become: true
  package:
    name: openssl
    state: present

- name: Run common Darwin/Linux tasks
  become: true
  block:
    - include_tasks: tls-Darwin-Linux.yml

- name: Ensure directory /etc/ssl/private exists
  become: true
  file:
    path: /etc/ssl/private
    state: directory
    mode: 0550

- name: Move Docker server certificates to protected SSL folder
  become: true
  copy:
    src: '/usr/local/share/.docker/certs.d/{{ item.src | default(item) }}'
    dest: '/etc/ssl/private/{{ item.dest | default(item) }}'
    owner: root
    group: docker
    mode: 0440
    remote_src: true
  loop:
    - docker-server-cert.pem
    - docker-server-key.pem
    - docker-ca-key.pem
    - src: ca.pem
      dest: docker-ca.pem

- name: Copy certificates to the ~/.docker folder on the machine running Ansible
  become: true
  fetch:
    src: '/usr/local/share/.docker/certs.d/{{ item }}'
    dest: '~/.docker/certs.d/{{ ansible_host | lower }}-{{ item }}'
    mode: 0400
    flat: true
  loop:
    - ca.pem
    - cert.pem
    - key.pem
  when:
    - ansible_host != 'local'

- name: Remove server keys from /usr/local/share/.docker
  become: true
  file:
    path: '/usr/local/share/.docker/certs.d/{{ item }}'
    state: absent
  loop:
    - docker-server-cert.pem
    - docker-server-key.pem
    - docker-ca-key.pem

- name: Allow TCP connections to Docker
  become: true
  lineinfile:
    path: /etc/systemd/system/multi-user.target.wants/docker.service
    regex: ExecStart=
    line: "ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --tlsverify \
      --tlscacert=/etc/ssl/private/docker-ca.pem --tlscert=/etc/ssl/private/docker-server-cert.pem \
      --tlskey=/etc/ssl/private/docker-server-key.pem -H=0.0.0.0:2424"
  notify:
    - reload systemd daemon
    - restart docker