Add role for adding docker nodes to swarm

roles/swarm/tasks/configure.yaml

@@ -0,0 +1,53 @@
+---
+- name: Determine docker daemon DNS servers
+  vars:
+    _docker_daemon_dns: []
+  ansible.builtin.set_fact:
+    _docker_daemon_dns: "{{ _docker_daemon_dns + (item.value.dns | default([])) }}"
+  loop: "{{ skylab_networking | dict2items }}"
+  loop_control:
+    label: "{{ item.key }}"
+
+- name: Create docker config directory
+  become: true
+  ansible.builtin.file:
+    path: /etc/docker
+    state: directory
+    owner: "{{ ansible_user }}"
+    group: docker
+    mode: 0750
+
+- name: Configure docker daemon
+  become: true
+  ansible.builtin.template:
+    src: daemon.json.j2
+    dest: /etc/docker/daemon.json
+    mode: 0640
+    owner: "{{ ansible_user }}"
+    group: docker
+
+- name: Start and enable docker service
+  become: true
+  ansible.builtin.systemd:
+    name: docker
+    state: started
+    enabled: true
+
+- name: Include access variables
+  ansible.builtin.include_vars:
+    file: vars/access.yaml
+
+- name: Add administrators to docker group
+  become: true
+  when: item.admin | default(false) and 'cluster' in item.targets
+  ansible.builtin.user:
+    name: "{{ item.name }}"
+    group: "{{ item.name }}"
+    groups: docker
+    append: true
+  loop: "{{ skylab_accounts }}"
+  loop_control:
+    label: "{{ item.name }},{{ item.uid }}"
+
+- name: Reset connection to get new group membership
+  ansible.builtin.meta: reset_connection