how to use mailu with nginx-proxy

[toshirov]

Hi,

Is there any documentation that shows how to run mailu using nginx-proxy (https://github.com/nginx-proxy/nginx-proxy) as a reverse proxy? I've been struggling with this for several days but couldn't make this work.

Any hints would be appreciated, thank you!

[pini-gh]

Do you use acme-companion along with nginx-proxy? I do, and here are the relevant bits of configuration:

• In the Mailu docker-compose file I comment out the lines related to ports 80 and 443:

    ports:
      #- "80:80"
      #- "443:443"
      - "25:25"
      - ...

• In mailu.env:

TLS_FLAVOR=mail
TLS_CERT_FILENAME=fullchain.pem

• The mailu_certs volume is defined in my nginx-proxy + acme-companion docker-compose file:

version: "3.5"
services:
  reverse-proxy:
    image: nginxproxy/nginx-proxy
    ...
    volumes:
      ...
      - mailu_certs:/etc/nginx/certs/mail.example.com
    ...
  letsencrypt:
    image; nginxproxy/acme-companion
    ...
    volumes:
      ...
      - mailu_certs:/etc/nginx/certs/mail.example.com
    ...
...
volumes:
  ...
  mailu_certs:
    name: mailu_certs

• The same volume is declared as external into the Mailu docker-compose file:

version: '2.2'
services:
  front:
    image: ${DOCKER_ORG:-ghcr.io/mailu}/${DOCKER_PREFIX:-}nginx:${MAILU_VERSION:-2.0}
    ...
    volumes:
      - "certs:/certs"
...
volumes:
  certs:
    external: true
    name: mailu_certs
...

• Finally I declare these environment variables for the front service:

      VIRTUAL_HOST: "mail.example.com"
      VIRTUAL_PORT: "80"
      LETSENCRYPT_HOST: "mail.example.com"
      # Hook acme.sh to reload the nginx configuration after a certificate update
      ACME_POST_HOOK: "bash -c '. /app/functions.sh && docker_exec mailu_front_1 '\\''[\\\"nginx\\\", \\\"-s\\\", \\\"reload\\\"]'\\'"

[toshirov]

@pini-gh I've tried your solution but it didn't work; would you mind to tell me where do you define exactly these variables?

   VIRTUAL_HOST: "mail.example.com"
  VIRTUAL_PORT: "80"
  LETSENCRYPT_HOST: "mail.example.com"
  # Hook acme.sh to reload the nginx configuration after a certificate update
  ACME_POST_HOOK: "bash -c '. /app/functions.sh && docker_exec mailu_front_1 '\\''[\\\"nginx\\\", \\\"-s\\\", \\\"reload\\\"]'\\'"

[pini-gh]

As I said above: in the environment section of the front service.