Docker Swarm + Traefik + Moodle Gateway Error - docker

Question

Having major problems getting my moodle installation working behind a traefik container in docker swarm. No matter what I try, I get a bad gateway error (different hosts in the frontend rule). I've read various posts on stack overflow and tutorials but due to the amount of commands and different options available, my head is spinning. Could somebody point me in the right direction?
version: '3.7'
services:
traefik:
image: traefik:v1.6.2
networks:
- traefik-proxy
volumes:
- /var/run/docker.sock:/var/run/docker.sock
- /etc/traefik/traefik.toml:/etc/traefik/traefik.toml
labels:
- traefik.docker.network=traefik-proxy
- traefik.http.routers.traefik-http.entrypoints=web
- traefik.port=8080
- traefik.enable=true
ports:
- "80:80"
- "8080:8080"
command: --api
mariadb:
image: bitnami/mariadb:latest
environment:
- MARIADB_USER=bn_moodle
- MARIADB_DATABASE=bitnami_moodle
- MARIADB_PASSWORD=bitnami
- ALLOW_EMPTY_PASSWORD=yes
volumes:
- /var/mariadb_data:/bitnami
networks:
- database
- traefik-proxy
ports:
- "3306:3306"
moodle:
image: bitnami/moodle:latest
environment:
- MOODLE_DATABASE_USER=bn_moodle
- MOODLE_DATABASE_NAME=bitnami_moodle
- MOODLE_DATABASE_PASSWORD=bitnami
- ALLOW_EMPTY_PASSWORD=yes
ports:
- 8000:80
volumes:
- /var/moodle_data:/bitnami
depends_on:
- mariadb
networks:
- database
- traefik-proxy
labels:
- traefik.enable=true
- traefik.http.routers.moodle.entrypoints=web
- traefik.port=80
- traefik.frontend.rule=Host:one.test.com
- traefik.docker.network=traefik-proxy
- traefik.backend=moodle.app
networks:
database:
driver: overlay
traefik-proxy:
external: true
volumes:
mariadb_data:
moodle_data:

Answer 1

At least following should be updated:
moodle uses port 8080, not 80. So, it can be a reason.
traefik.enable=false should be set for mariadb and traefik services as there is no sense to send a traffic to them
mariadb should have only database network - means isolation from traefik
make traefik more supportive with command: --providers.docker --api --api.insecure=true --providers.docker.watch true
Here is a config for Docker Compose that uses traefik:v2.0.
version: '3.7'
services:
traefik:
image: traefik:v2.0
networks:
- traefik-proxy
volumes:
- /var/run/docker.sock:/var/run/docker.sock
labels:
- "traefik.enable=false"
ports:
- "80:80"
- "8080:8080"
command: --providers.docker --api --api.insecure=true --providers.docker.watch true
mariadb:
image: bitnami/mariadb:latest
labels:
- "traefik.enable=false"
environment:
- MARIADB_USER=bn_moodle
- MARIADB_DATABASE=bitnami_moodle
- MARIADB_PASSWORD=bitnami
- ALLOW_EMPTY_PASSWORD=yes
networks:
- database
moodle:
image: bitnami/moodle:latest
environment:
- MOODLE_DATABASE_USER=bn_moodle
- MOODLE_DATABASE_NAME=bitnami_moodle
- MOODLE_DATABASE_PASSWORD=bitnami
- ALLOW_EMPTY_PASSWORD=yes
ports:
- 8000:8080
depends_on:
- mariadb
networks:
- database
- traefik-proxy
labels:
- "traefik.enable=true"
- "traefik.http.services.moodle.loadbalancer.server.port=8080"
- "traefik.http.routers.moodle.rule=HostRegexp(`{catchall:.*}`)"
- "traefik.docker.network=traefik-proxy"
networks:
database:
driver: bridge
traefik-proxy:
external: true
Run
docker-compose up -d
docker-compose logs -f
and when log displays lines like
moodle_1 | moodle 11:05:41.68 INFO ==> Running Moodle install script
moodle_1 | moodle 11:08:14.90 INFO ==> Persisting Moodle installation
moodle_1 | moodle 11:08:21.75 INFO ==> ** Moodle setup finished! **
moodle_1 |
moodle_1 | moodle 11:08:21.77 INFO ==> ** Starting cron **
moodle_1 | moodle 11:08:21.80 INFO ==> ** Starting Apache **
try to open http://localhost.
BTW, http://localhost:8080 will open Traefik dashboard. It's useful to see what's is managed and how.