Merge pull request #26 from jamesla/master

Add a docker_users variable

README.md

@@ -42,6 +42,12 @@ Docker Compose installation options.
 
 (Used only for RedHat/CentOS.) You can enable the Edge or Test repo by setting the respective vars to `1`.
 
+    docker_users:
+      - user1
+      - user2
+
+Set the docker_users variable to allow those users to run docker (these users are added to the docker group)
+
 ## Use with Ansible (and `docker` Python library)
 
 Many users of this role wish to also use Ansible to then _build_ Docker images and manage Docker containers on the server where Docker is installed. In this case, you can easily add in the `docker` Python library using the `geerlingguy.pip` role:

defaults/main.yml

@@ -20,3 +20,6 @@ docker_apt_ignore_key_error: True
 docker_yum_repo_url: https://download.docker.com/linux/{{ (ansible_distribution == "Fedora") | ternary("fedora","centos") }}/docker-{{ docker_edition }}.repo
 docker_yum_repo_enable_edge: 0
 docker_yum_repo_enable_test: 0
+
+# A list of users who will be added to the docker group.
+docker_users: []

tasks/docker-users.yml

@@ -0,0 +1,7 @@
+---
+- name: Ensure docker users are added to the docker group.
+  user:
+    name: "{{ item }}"
+    group: docker
+    append: yes
+  with_items: "{{ docker_users }}"

tasks/main.yml

@@ -23,3 +23,6 @@
 
 - include_tasks: docker-compose.yml
   when: docker_install_compose
+
+- include: docker-users.yml
+  when: docker_users