nginx-proxy sets up a container running nginx and docker-gen. docker-gen generates reverse proxy configs for nginx and reloads nginx when containers are started and stopped.

See Automated Nginx Reverse Proxy for Docker for why you might want to use this.

Usage

To run it:

docker run --detach \
    --name nginx-proxy \
    --publish 80:80 \
    --volume /var/run/docker.sock:/tmp/docker.sock:ro \
    nginxproxy/nginx-proxy:1.4

Then start any containers (here an nginx container) you want proxied with an env var VIRTUAL_HOST=subdomain.yourdomain.com

docker run --detach \
    --name your-proxied-app \
    --env VIRTUAL_HOST=foo.bar.com \
    nginx

Provided your DNS is setup to resolve foo.bar.com to the host running nginx-proxy, a request to http://foo.bar.com will then be routed to a container with the VIRTUAL_HOST env var set to foo.bar.com (in this case, the your-proxied-app container).

The containers being proxied must :

• expose the port to be proxied, either by using the EXPOSE directive in their Dockerfile or by using the --expose flag to docker run or docker create.
• share at least one Docker network with the nginx-proxy container: by default, if you don't pass the --net flag when your nginx-proxy container is created, it will only be attached to the default bridge network. This means that it will not be able to connect to containers on networks other than bridge.

Note: providing a port number in VIRTUAL_HOST isn't suported, please see virtual ports or custom external HTTP/HTTPS ports depending on what you want to achieve.

Image variants

The nginx-proxy images are available in two flavors.

Debian based version

This image is based on the nginx:mainline image, itself based on the debian slim image.

docker pull nginxproxy/nginx-proxy:1.4

Alpine based version (-alpine suffix)

This image is based on the nginx:alpine image.

docker pull nginxproxy/nginx-proxy:1.4-alpine

⚠️ a note on latest and alpine:

It is not recommended to use the latest (nginxproxy/nginx-proxy, nginxproxy/nginx-proxy:latest) or alpine (nginxproxy/nginx-proxy:alpine) tag for production setups.

Those tags points to the latest commit in the main branch. They do not carry any promise of stability, and using them will probably put your nginx-proxy setup at risk of experiencing uncontrolled updates to non backward compatible versions (or versions with breaking changes). You should always specify the version you want to use explicitly to ensure your setup doesn't break when the image is updated.

Additional documentation

Please check the docs section.