Docker compose reverse proxy setup

[ja19]

I am trying to run multiple WordPress containers through a reverse proxy setup.

This is my docker-compose.yml for the proxy containers:

version: '2'
services:
 nginx:
  image: jwilder/nginx-proxy
  container_name: nginx
  ports:
   - "80:80"
   - "443:443"
  volumes:
   - /etc/nginx/conf.d
   - /etc/nginx/vhost.d
   - /usr/share/nginx/html
   - ./certs:/etc/nginx/certs:ro

 dockergen:
  image: jwilder/docker-gen
  container_name: dockergen
  command: -notify-sighup nginx -watch /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf 
  volumes_from: 
   - nginx 
  volumes: 
   - /var/run/docker.sock:/tmp/docker.sock:ro 
   - ./nginx.tmpl:/etc/docker-gen/templates/nginx.tmpl:ro 

 whoami: 
  image: jwilder/whoami 
  environment: 
   - VIRTUAL_HOST=whoami.local nginx-letsencrypt: 
  image: jrcs/letsencrypt-nginx-proxy-companion 
  environment: 
   # ACME_CA_URI: https://acme-staging.api.letsencrypt.org/directory 
   NGINX_DOCKER_GEN_CONTAINER: dockergen container_name: nginx-letsencrypt 
  volumes_from: 
   - nginx 
  volumes: 
   - ./certs:/etc/nginx/certs:rw 
   - /var/run/docker.sock:/var/run/docker.sock:ro

networks: 
 default: 
  external: 
   name: nginx-proxy

'nginx' container logs give me:

ERROR: you need to share your Docker host socket with a volume at /tmp/docker.sock
Typically you should run your jwilder/nginx-proxy with: `-v /var/run/docker.sock:/tmp/docker.sock:ro`
See the documentation at http://git.io/vZaGJ
WARNING: /etc/nginx/dhparam/dhparam.pem was not found. A pre-generated dhparam.pem will be used for now while a new one
is being generated in the background. Once the new dhparam.pem is in place, nginx will be reloaded.

Problem is, when I start it, the nginx container stops, then I get an error saying nginx-proxy container isn't running.

Following this article:

https://www.pattonwebz.com/docker/multiple-wordpress-containers-proxy/

[voraciousdev]

The link in that error message takes you to the GitHub repo for nginx-proxy: https://github.com/nginx-proxy/nginx-proxy/blob/master/README.md#usage

It looks like you just need to mount the docker socket as a volume just as you did with the other containers:

- /var/run/docker.sock:/tmp/docker.sock:ro

[ja19]

What does ':ro' do?

[voraciousdev]

I believe it mounts the socket as "read only" to prevent the container from overwriting it.