readd remote access, with optional ip

defaults/main.yml

@@ -27,3 +27,5 @@ docker_yum_repo_enable_test: 0
 
 # A list of users who will be added to the docker group.
 docker_users: []
+
+docker_remote_access: False

tasks/main.yml

@@ -29,3 +29,6 @@
 
 - include_tasks: docker-users.yml
   when: docker_users
+
+- include_tasks: remote-access.yml
+  when: docker_remote_access

tasks/remote-access.yml

@@ -0,0 +1,22 @@
+---
+- name: add docker.service.d/override.conf override
+  copy:
+    dest: /etc/systemd/system/docker.service.d/startup_options.conf
+    content: |
+      # /etc/systemd/system/docker.service.d/override.conf
+      [Service]
+      ExecStart=
+      ExecStart=/usr/bin/dockerd -H fd:// -H tcp://{{ docker_remote_access_ip | default('0.0.0.0') }}:2375
+  register: docker_override
+
+- name: reload docker daemon
+  systemd:
+    daemon_reload: yes
+  when: docker_override is changed
+
+- name: restart docker service
+  service:
+    name: docker
+    state: restarted
+    daemon_reload: yes
+  when: docker_override is changed

templates/override.conf.j2

@@ -1,4 +1,3 @@
 # {{ ansible_managed }}
 [Service]
 ExecStartPre=
-{% if docker_exec_start is defined %}ExecStart={{ docker_exec_start }}{% endif %}