docker-letsencrypt-nginx-proxy-companion/docs/Advanced-usage.md

Advanced usage (with the nginx and docker-gen containers)

nginx-proxy can also be run as two separate containers using the nginx-proxy/docker-gen image and the official nginx image. You may want to do this to prevent having the docker socket bound to a publicly exposed container service (ie avoid mounting the docker socket in the nginx exposed container).

Please read and try basic usage, and validate that you have a working two containers setup before using the three containers setup. In addition to the steps described there, running nginx-proxy as two separate containers with acme-companion requires the following:

1. Download and mount the template file nginx.tmpl into the docker-gen container. You can get the nginx.tmpl file with a command like:

curl https://raw.githubusercontent.com/nginx-proxy/nginx-proxy/main/nginx.tmpl > /path/to/nginx.tmpl

2. Use the com.github.nginx-proxy.docker-gen label on the docker-gen container, or explicitly set the NGINX_DOCKER_GEN_CONTAINER environment variable on the acme-companion container to the name or id of the docker-gen container (we'll use the later method in the example).

3. Declare /etc/nginx/conf.d as a volume on the nginx container so that it can be shared with the docker-gen container.

Example:

Step 1 - nginx

• Start nginx (official image) with the required volumes:

$ docker run --detach \
    --name nginx-proxy \
    --publish 80:80 \
    --publish 443:443 \
    --volume conf:/etc/nginx/conf.d  \
    --volume html:/usr/share/nginx/html \
    --volume certs:/etc/nginx/certs \
    nginx

Step 2 - docker-gen

• Start the docker-gen container with the shared volumes (with --volume-from), the template file and the docker socket:

$ docker run --detach \
    --name nginx-proxy-gen \
    --volumes-from nginx-proxy \
    --volume /path/to/nginx.tmpl:/etc/docker-gen/templates/nginx.tmpl:ro \
    --volume /var/run/docker.sock:/tmp/docker.sock:ro \
    nginxproxy/docker-gen \
    -notify-sighup nginx-proxy -watch -wait 5s:30s /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf

Note that you must pass the exact name of the nginx container to docker-gen -notify-sighup argument (here nginx-proxy).

Step 3 - acme-companion

• Start the acme-companion container with the NGINX_DOCKER_GEN_CONTAINER environment variable correctly set:

$ docker run --detach \
    --name nginx-proxy-acme \
    --volumes-from nginx-proxy \
    --volume /var/run/docker.sock:/var/run/docker.sock:ro \
    --volume acme:/etc/acme.sh \
    --env "NGINX_DOCKER_GEN_CONTAINER=nginx-proxy-gen" \
    --env "DEFAULT_EMAIL=mail@yourdomain.tld" \
    nginxproxy/acme-companion

Step 4 - proxyed container(s)

• Once the three containers are up, start any containers to be proxied as described in basic usage.

$ docker run --detach \
    --name your-proxyed-app \
    --env "VIRTUAL_HOST=subdomain.yourdomain.tld" \
    --env "LETSENCRYPT_HOST=subdomain.yourdomain.tld" \
    nginx

If you are experiencing issues with this setup, fall back to the basic setup. The advanced setup is not meant to be obligatory.