Traefik not updating when services are deployed to docker swarm - docker

Question

I have a traefik environment running in docker. Originally I was running services in standard containers. I am not deploying containers to docker swarm and I have done this for traefik too, where the container is only deployed to my swarm manager.
For some reason, traefik successfully registers the host name I have given it, and can access that fine.
However, when I deploy any other service to the swarm, traefik doesn't pick it up.
There is one other service that has partially worked. I have deployed heimdall to docker swarm which can be access from gateway.docker.swarm:8091 but I don't want the port either.
My traefik compose file is as follows:
version: '3.3'
networks:
swarm-network:
driver: overlay
services:
traefik:
# The official v2 Traefik docker image
image: traefik
deploy:
placement:
constraints:
- node.role == manager
labels:
- "traefik.enable=true"
- "traefik.docker.network=pi_swarm-network"
- "traefik.http.routers.traefik.entrypoints=http"
- "traefik.http.services.traefik.loadbalancer.server.port=8080"
- "traefik.http.routers.traefik.rule=Host(`traefik.docker.swarm`)"
# Enables the web UI and tells Traefik to listen to docker
command:
- '--api.insecure=true'
- '--providers.docker=true'
- '--providers.docker.swarmmode=true'
- '--providers.docker.defaultRule=Host("docker.swarm")'
- '--providers.docker.watch=true'
- '--providers.docker.swarmModeRefreshSeconds=15s'
# Metrics configuration for influx db.
- '--metrics=true'
- '--metrics.influxdb=true'
- '--metrics.influxdb.address=192.168.8.122:8086'
- '--metrics.influxdb.protocol=http'
- '--metrics.influxdb.database=traefik'
- '--metrics.influxdb.addEntryPointsLabels=true'
- '--metrics.influxdb.addServicesLabels=true'
- '--metrics.influxdb.pushInterval=10s'
# Tracing
- '--tracing=true'
- '--tracing.zipkin=true'
- '--tracing.zipkin.httpEndpoint=http://192.168.8.117:9411/api/v2/spans'
- '--log'
- '--accesslog'
ports:
# The HTTP port
- "80:80"
# The Web UI (enabled by --api.insecure=true)
- "8080:8080"
networks:
- swarm-network
volumes:
# So that Traefik can listen to the Docker events
- /var/run/docker.sock:/var/run/docker.sock
An example of another service I am running is heimdall which has the compose file of the following:
version: "3"
networks:
swarm-network:
external:
name: pi_swarm-network
services:
heimdall:
image: ghcr.io/linuxserver/heimdall
environment:
- PUID=1000
- PGID=1000
- TZ=Europe/London
deploy:
placement:
constraints:
- node.labels.tier == web
labels:
- "traefik.enable=true"
- "traefik.docker.network=pi_swarm-network"
- "traefik.http.routers.heimdall.entrypoints=http"
- "traefik.http.services.heimdall.loadbalancer.server.port=8091"
- "traefik.http.routers.heimdall.rule=Host(`gateway.docker.swarm`)"
ports:
- 8091:80
restart: unless-stopped
networks:
- swarm-network
Can anyone see what I'm doing wrong?

Answer 1

I have figured out the problem.
In my compose file, I was using "traefik.http.services.heimdall.loadbalancer.entrypoints=http"
as well as
"traefik.http.routers.heimdall.entrypoints=http"
this was incorrect and needed to just be
"traefik.http.routers.heimdall.entrypoints=http"
For heimdall, I was also targetting the external port of 8091, whereas I actually needed to target the internal port of 80