Added role for jwilder nginx proxy.

This is useful when you want to handle ssl or when you want to proxy
multiple containers on a single host.

nginx_proxy.yml

@@ -0,0 +1,6 @@
+---
+- hosts: all
+  become: True
+  roles:
+     - docker
+     - nginx-proxy

roles/docker/main.yml

@@ -0,0 +1,25 @@
+---
+# Install Docker. Centos needs te be added.
+
+- apt_key:
+    id: 58118E89F3A912897C070ADBF76221572C52609D
+    keyserver: hkp://p80.pool.sks-keyservers.net:80
+    state: present
+  when: ansible_distribution == 'Ubuntu' and ansible_distribution_release == 'xenial'
+
+- apt_repository:
+    repo: deb https://apt.dockerproject.org/repo ubuntu-xenial main
+    update_cache: yes
+  when: ansible_distribution == 'Ubuntu' and ansible_distribution_release == 'xenial'
+
+- name: install docker
+  apt: pkg={{ item }} state=latest
+  with_items:
+     - docker-engine
+     - python-docker
+  when: ansible_distribution == 'Ubuntu' and ansible_distribution_release == 'xenial'
+
+- name: make sure service is started
+  systemd:
+    name: docker.service
+    state: started

roles/nginx-proxy/tasks/main.yml

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+# Install a nginx reverse proxy with a systemd unit file.
+# See https://github.com/jwilder/nginx-proxy
+---
+- name: install service file.
+  template:
+    src: templates/nginx-proxy.service
+    dest: /etc/systemd/system/nginx-proxy.service
+    mode: 644
+    owner: root
+    group: root
+
+- command: systemctl daemon-reload
+
+- name: start service at boot.
+  command: systemctl reenable nginx-proxy.service
+
+- name: make sure service is started
+  systemd:
+    name: nginx-proxy.service
+    state: restarted

roles/nginx-proxy/templates/nginx-proxy.service

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+[Unit]
+Description=nginx reverse proxy for docker containers.
+After=docker.service
+Requires=docker.service
+
+[Service]
+TimeoutStartSec=0
+Restart=always
+ExecStartPre=-/usr/bin/docker kill %n
+ExecStartPre=-/usr/bin/docker rm %n
+ExecStart=/usr/bin/docker run --name %n \
+    --rm -d -p 80:80 -p 443:443 -v /srv/certs:/etc/nginx/certs \
+    -v /var/run/docker.sock:/tmp/docker.sock:ro jwilder/nginx-proxy
+
+[Install]
+WantedBy=multi-user.target