Can't change port 80 to 81 / 443 to 8443 in docker

Traefik Traefik v3 (latest)
1

Structure:

My Website uses SOLR for searching. Since I have three SOLR Nodes I want to use Traefik to handle the load balancing of those Nodes. Everything runs in Docker containers.

What I want to achieve

  • SOLR should be available through solr.localhost
  • Traefik should be available through traefik.localhost
  • The load balancing of the three SOLR Nodes on solr.localhost

Versions:

  • Traefik v. 3.3.2
  • SOLR v 9.7.0

Problem:

I deploy the website in Plesk which uses Nginx that runs on port 80 and 443. So I need to run Traefik on different ports. I tried to change the Traefik port 80:80 to port 81:80 and port 443:443 to 8443:443. On port 80:80 / 443:443 SOLR and Traefik are available on the subdomains. But when I change the ports, the subdomains are no longer working and nether does the load balancing work because of the unreachable subdomain.

What I tried:

I tried nearly everything you can find on the internet to change this port but nothing worked. I think i'm missing something in the docker-compose settings but I can't figure out what it is.

Questions:

Is it just not possible to change the port?

Has anyone a solution to this problem?

docker-compose.yml:

services:
  traefik:
    image: traefik:3.3.2
    container_name: traefik
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ./certs:/etc/certs/
    ports:
      - "81:80"
      - "8443:443"
      - "8090:8080"
    command:
      - --providers.docker
      - --providers.docker.exposedbydefault=false
      - --entrypoints.http.address=:80
      - --entrypoints.https.address=:443
      - --accesslog
      - --log
      - --log.level=DEBUG
      - --api
      - --api.insecure=true
    labels:
      - traefik.enable=true
      - traefik.docker.network=solr-cloud-concept_traefik-network
      - traefik.constraint-label=solr-cloud-concept_traefik-network
      - traefik.http.services.traefik-dashboard.loadbalancer.server.port=8080
      - traefik.http.routers.traefik-dashboard-http.entrypoints=http
      - traefik.http.routers.traefik-dashboard-http.rule=Host(`traefik.localhost`)
      - traefik.http.routers.traefik-dashboard-https.entrypoints=https
      - traefik.http.routers.traefik-dashboard-https.rule=Host(`traefik.localhost`)
      - traefik.http.routers.traefik-dashboard-https.tls=true
      - traefik.http.routers.traefik-dashboard-https.service=api@internal
      - traefik.http.middlewares.https-redirect.redirectscheme.scheme=https
      - traefik.http.middlewares.https-redirect.redirectscheme.permanent=true
  networks:
      - traefik-network

  solr1:
    image: solr:9.7.0
    container_name: solr1
    ports:
      - "8983:8983"
    networks:
      - solr-network
      - traefik-network
    environment:
      ZK_HOST: zoo1:2181,zoo2:2181,zoo3:2181
      SOLR_HOST: solr1
      SOLR_PORT: 8983
    depends_on: 
      - zoo1
      - zoo2
      - zoo3
    labels:
      - traefik.enable=true
      - traefik.docker.network=solr-cloud-concept_traefik-network
      - traefik.constraint-label=solr-cloud-concept_traefik-network
      - traefik.http.services.solr.loadbalancer.server.port=8983
      - traefik.http.routers.solr-http.rule=Host(`solr.localhost`)
      - traefik.http.routers.solr-http.entrypoints=http
      - traefik.http.routers.solr-https.rule=Host(`solr.localhost`)
      - traefik.http.routers.solr-https.entrypoints=https
      - traefik.http.routers.solr-https.tls=true


  solr2:
    image: solr:9.7.0
    container_name: solr2
    networks:
      - solr-network
      - traefik-network
    environment:
      ZK_HOST: zoo1:2181,zoo2:2181,zoo3:2181
      SOLR_HOST: solr2
      SOLR_PORT: 8983
    depends_on: 
      - zoo1
      - zoo2
      - zoo3
    labels:
     - traefik.enable=true
      - traefik.docker.network=solr-cloud-concept_traefik-network
      - traefik.constraint-label=solr-cloud-concept_traefik-network
      - traefik.http.services.solr.loadbalancer.server.port=8983
      - traefik.http.routers.solr-http.rule=Host(`solr.localhost`)
      - traefik.http.routers.solr-http.entrypoints=http
      - traefik.http.routers.solr-https.rule=Host(`solr.localhost`)
      - traefik.http.routers.solr-https.entrypoints=https
      - traefik.http.routers.solr-https.tls=true


  solr3:
    image: solr:9.7.0
    container_name: solr3
    networks:
      - solr-network
      - traefik-network
    environment:
      ZK_HOST: zoo1:2181,zoo2:2181,zoo3:2181
      SOLR_HOST: solr3
      SOLR_PORT: 8983
    depends_on: 
      - zoo1
      - zoo2
      - zoo3
    labels:
      - traefik.enable=true
      - traefik.docker.network=solr-cloud-concept_traefik-network
      - traefik.constraint-label=solr-cloud-concept_traefik-network
      - traefik.http.services.solr.loadbalancer.server.port=8983
      - traefik.http.routers.solr-http.rule=Host(`solr.localhost`)
      - traefik.http.routers.solr-http.entrypoints=http
      - traefik.http.routers.solr-https.rule=Host(`solr.localhost`)
      - traefik.http.routers.solr-https.entrypoints=https
      - traefik.http.routers.solr-https.tls=true


  zoo1:
    image: zookeeper:3.9.3
    container_name: zoo1
    networks:
      - solr-network
    environment:
      ZOO_MY_ID: 1
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181
      ZOO_4LW_COMMANDS_WHITELIST: "mntr,conf,ruok"
    expose: 
      - "2181"
    labels:
      - "traefik.enable=false"

  zoo2:
    image: zookeeper:3.9.3
    container_name: zoo2
    networks:
      - solr-network
    environment:
      ZOO_MY_ID: 2
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181
      ZOO_4LW_COMMANDS_WHITELIST: "mntr,conf,ruok"
    expose: 
      - "2181"
    labels:
      - "traefik.enable=false"

  zoo3:
    image: zookeeper:3.9.3
    container_name: zoo3
    networks:
      - solr-network
    environment:
      ZOO_MY_ID: 3
      ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181
      ZOO_4LW_COMMANDS_WHITELIST: "mntr,conf,ruok"
    expose: 
      - "2181"
    labels:
      - "traefik.enable=false"

volumes:
  traefik-certificates:

networks:
  traefik-network:
    external: false
  solr-network:
    driver: bridge
2

If you have a working reference implementation with

    ports:
      - "80:80"
      - "443:443"

then only changing ports should work:

Except for LetsEncrypt TLS cert generation. httpChallenge requires external port 80, tlsChallenge requires external port 443, you can only use dnsChallenge if those are not available.

Your config looks incomplete, you enable TLS, have no certResolver, don't load own TLS certs, so Traefik will generate custom TLS certs, which no client/browser will trust.

Also using localhost is not really recommended, as localhost inside a container is not localhost on host, so this usually does not work.

Maybe check some of the simple Traefik examples for best practice.

3

This is the weird thing with port 80 and 443 exactly this code works but it wont when I change the ports to 81 and 8443.

Does it matter if I have the certs if I use it on localhost?
Could it affect the function on the non-standard ports?
(On standard ports i still can access traefik.localhost/solr.localhost if I remove the "TLS enable")

The docker-compose I provided is a breakdown of the actual docker-compose which we will use in production and is only used to solve this problem locally. So I guess it doesn't matter if I use localhost (Since this works with the standard ports)?

Thank you @bluepuma77