Setup for running multiple websites on a single server

Uses Nginx as a proxy server, and the docker-gen and docker-letsencrypt-nginx-proxy-companion container utilities.
Serves secure websites with automatically generated and renewed Let's Encrypt certificates.
Only exposes one web server, connects to other web servers using a custom network.

Usage

If you didn't do so already, set up a server using docker-machine create.
Export the name you used for the server as the environment variable DOCKER_MACHINE_NAME, e.g.:

export DOCKER_MACHINE_NAME=personal-websites
Run ./deploy.sh to install the Nginx proxy server.

Now for every website you want to expose on the same server:

Write a Dockerfile for the website server, for example (assuming that copying some files to the default document root is sufficient):
```
FROM nginx:1.11-alpine
RUN rm -rf /usr/share/nginx/html
COPY web /usr/share/nginx/html
```

Define a service for that container in docker-compose.yml:

version: '2'

services:
    website:
        image: your-username/your-website-name
        build:
            context: .
            dockerfile: Dockerfile
        restart: always
        environment:
            - VIRTUAL_HOST=your.hostname.com
            - VIRTUAL_NETWORK=nginx-proxy
            - LETSENCRYPT_HOST=your.hostname.com
            - LETSENCRYPT_EMAIL=your@email.com
        networks:
            - proxy-tier

networks:
    proxy-tier:
        external:
            name: nginx-proxy

Deploy the website by running the following commands (of course it would make sense to automate this):

eval $(docker-machine env $DOCKER_MACHINE_NAME)
docker network create --driver bridge nginx-proxy || true
docker-compose pull
docker-compose up -d --force-recreate --no-build
docker-compose ps
eval $(docker-machine env -u)

It may take a minute or so before the secure site can be reached (because the certificate has to be created first).

matthiasnoback/nginx-multi-host-docker

Setup for running multiple websites on a single server

Usage