Add docker role + check for python

roles/docker/tasks/main.yml

@@ -0,0 +1,17 @@
+---
+- name: add docker gpg key
+  apt_key:
+    keyserver: pgp.key-server.io
+    id: 8D81803C0EBFCD88
+    state: present
+
+- name: add docker apt repository
+  apt_repository:
+    repo: deb https://download.docker.com/linux/ubuntu artful stable
+    state: present
+    update_cache: yes
+
+- name: install docker-ce
+  apt:
+    name: docker-ce
+    state: present

roles/playbook.yml

@@ -1,4 +1,14 @@
 ---
+- hosts: all
+  gather_facts: False
+  
+  pre_tasks:
+  - name: install python for Ansible
+    raw: test -e /usr/bin/python || (apt -y update && apt install -y python-minimal)
+    register: output
+    changed_when: output.stdout != ""
+  - setup:
+
 - name: "Include host secrets where applicable"
   hosts: "all"
   tasks:
@@ -11,4 +21,10 @@
   hosts: "all"
   become: yes
   roles:
-    - "ubuntu_base"
+    - "ubuntu_base"
+
+- name: "Install docker on all kubernetes servers"
+  hosts: "all_kubernetes_servers"
+  become: yes
+  roles:
+    - "docker"