added playbook and associated roles for setting up docker

jupyterhub-kubespawner/playbooks/setup_docker.yml

+---
+- hosts: all
+
+  remote_user: root
+
+  roles:
+    - role: roles/install-docker
+    - role: roles/configure-docker

jupyterhub-kubespawner/roles/configure-docker/files/daemon.json

+{   
+  "exec-opts": ["native.cgroupdriver=systemd"],
+  "log-driver": "json-file",
+  "log-opts": {
+     "max-size": "100m"
+  },
+  "storage-driver": "overlay2",
+  "bip": "10.142.242.1/24"
+}
+
+

jupyterhub-kubespawner/roles/configure-docker/files/http-proxy.conf

+[Service]
+Environment="HTTP_PROXY=http://proxy.ill.fr:8888/"
+
+

jupyterhub-kubespawner/roles/configure-docker/handlers/main.yml

 ---
-# handlers file for setup-docker
+- name: Docker restart
+  service:
+    name: docker
+    state: restarted

jupyterhub-kubespawner/roles/configure-docker/tasks/main.yml

 ---
-# tasks file for setup-docker
-- include: install-docker.yml
-- include: configure-docker.yml
+- name: create docker config dir
+  file:
+    state: directory
+    path: /etc/docker
+    owner: root
+    mode: 0750
+
+- name: configure Docker default network
+  copy:
+    src: daemon.json
+    dest: /etc/docker/daemon.json
+    mode: 0644
+    owner: root
+  notify: Docker restart
+
+- name: create Docker service config directory
+  file:
+    state: directory
+    path: /etc/systemd/system/docker.service.d/
+    mode: 0755
+    owner: root
+
+- name: configure http proxy for Docker daemon
+  copy:
+     src: http-proxy.conf
+     dest: /etc/systemd/system/docker.service.d/http-proxy.conf
+     mode: 0644
+     owner: root
+  notify: Docker restart
+
+- name: start and enable docker daemon now that it is configured
+  service:
+    name: docker
+    state: started
+    enabled: yes
+
+- name: create user docker
+  user:
+    create_home: yes
+    home: /docker
+    group: docker
+    name: docker
+    shell: /bin/bash
+    state: present

jupyterhub-kubespawner/roles/install-docker/files/policy-rc.d

+#!/bin/sh
+echo "All runlevel operations denied by policy" >&2
+exit 101

jupyterhub-kubespawner/roles/install-docker/handlers/main.yml

+---
+- name: Docker restart
+  service:
+    name: docker
+    state: restarted

jupyterhub-kubespawner/roles/install-docker/tasks/configure-docker.yml

+- name: copy docker service file to proper location
+  copy:
+    src: /lib/systemd/system/docker.service
+    dest: /etc/systemd/system/
+
+- name: add ILL proxy settings to docker service environment
+  lineinfile:
+    path: /etc/systemd/system/docker.service
+    line: Environment="HTTP_PROXY=http://proxy.ill.fr:8888/" "HTTPS_PROXY=http://proxy.ill.fr:8888/" "NO_PROXY=localhost,127.0.0.1,ill.fr,ill.eu"
+    state: present
+    insertbefore: ^ExecStart
+
+- name: add ILL-specific hack
+  lineinfile:
+    path: /etc/systemd/system/docker.service
+    line: ExecStart=/usr/bin/dockerd --bip=10.10.10.1/24 --dns=195.83.126.2 -H fd://
+    state: present
+    regexp: ^ExecStart
+
+# set systemd as the cgroup driver to avoid kubernetes warning about potentially conflicting drivers
+# see https://kubernetes.io/docs/setup/production-environment/container-runtimes/ 
+- name: set systemd as the default docker cgroup driver
+  copy:
+    src: docker-daemon.json
+    dest: /etc/docker/daemon.json
+
+- name: restart docker
+  systemd:
+    name: docker
+    state: restarted
+    daemon_reload: yes

jupyterhub-kubespawner/roles/install-docker/tasks/main.yml

+---
+# tasks file for install-docker
+- name: install apt dependencies
+  apt:
+    name: "{{ item }}"
+    update_cache: true
+  loop:
+    - apache2
+    - apt-transport-https 
+    - ca-certificates
+    - curl
+    - gnupg2
+    - software-properties-common
+    - python-docker
+    - python3-docker
+    - python-pip
+
+- name: fetch and install the gpg key for docker
+  apt_key:
+    url: https://download.docker.com/linux/ubuntu/gpg
+    state: present
+
+- name: prevent docker daemon from starting when docker get installed
+  copy:
+    src: policy-rc.d
+    dest: /usr/sbin/policy-rc.d
+    mode: 0755
+    owner: root
+
+- name: add docker repository from ppa
+  apt_repository:
+    repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ansible_distribution_release}} stable
+    state: present
+    update_cache: yes
+
+- name: install docker
+  apt:
+    name: docker-ce 
+    update_cache: true
+
+- name: install docker-compose (pip)
+  pip:
+    name: docker-compose
+    state: present