docker_compose_install - fixup from docker-install

python 3 etc.

roles/docker_compose_install/defaults/main.yml

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+---
+## Installs docker-CE
+# Following guide from here:
+# https://docs.docker.com/install/linux/docker-ce/ubuntu/#set-up-the-repository
+
+# The docker apt repo key uri
+docker_compose_install_apt_key_uri: https://download.docker.com/linux/ubuntu/gpg
+
+# The docker apt repo config line
+docker_compose_install_apt_repo: deb https://download.docker.com/linux/ubuntu {{ansible_lsb.codename}} stable
+
+# This needs to be supplied externally.
+# Get this version from https://github.com/docker/compose/releases/
+# Check compatibility with docker.
+#docker_compose_install_compose_version: 
+

roles/docker_compose_install/tasks/main.yml

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+---
+
+- name: install prereqs (apt)
+  apt:
+    update_cache: true
+    name:
+      - apt-transport-https
+      - ca-certificates
+      - software-properties-common
+      - python3-pip
+      - virtualenv
+      - python3-setuptools
+      - python3-docker
+
+- name: add docker repository key
+  apt_key:
+    url: "{{ docker_compose_install_apt_key_uri }}"
+    state: present
+
+- name: add docker repository
+  apt_repository:
+    repo: "{{ docker_compose_install_apt_repo }}"
+    filename: docker-ce
+    state: present
+    update_cache: true
+
+- name: install docker-ce
+  apt:
+    name:
+      - docker-ce
+
+# Oddly, there is no docker-compose PPA, the suggested linux install
+# method is to download a binary. See:
+# https://docs.docker.com/compose/install/#master-builds
+
+- name: install docker-compose
+  pip:
+    name:
+      - docker-compose
+
+- name: docker daemon configuration
+  copy:
+    dest: /etc/docker/daemon.json
+    content: |-
+      {
+        "log-driver": "json-file",
+        "log-opts": {
+          "max-size": "30m"
+        }
+      }
+  notify:
+    - restart docker daemon
+    
+- name: enable docker
+  service:
+    name: docker
+    state: started
+    enabled: yes