Bad gateway on traefik docker - docker

Question

I build traefik with cloudflare CDN. I used docker container run command to execute my docker container execute by Drone CI. I have an issue when I successfully built docker container which leads to bad gateway on subdomain.
docker-compose.yml
version: '3'
services:
traefik:
image: traefik:latest
container_name: traefik
restart: always
domainname: ${DOMAINNAME}
networks:
- traefik_proxy
ports:
- "80:80"
- "443:443"
- "8080:8080"
environment:
- CF_API_EMAIL=${CLOUDFLARE_EMAIL}
- CF_API_KEY=${CLOUDFLARE_API_KEY}
labels:
- "traefik.enable=true"
- "traefik.backend=traefik"
- "traefik.frontend.rule=Host:monitor.${DOMAINNAME}"
- "traefik.port=8080"
- "traefik.docker.network=traefik_proxy"
- "traefik.frontend.headers.SSLRedirect=true"
- "traefik.frontend.headers.STSSeconds=315360000"
- "traefik.frontend.headers.browserXSSFilter=true"
- "traefik.frontend.headers.contentTypeNosniff=true"
- "traefik.frontend.headers.forceSTSHeader=true"
- "traefik.frontend.headers.SSLHost=example.com"
- "traefik.frontend.headers.STSIncludeSubdomains=true"
- "traefik.frontend.headers.STSPreload=true"
- "traefik.frontend.headers.frameDeny=true"
- "traefik.frontend.auth.basic.users:${HTTP_USERNAME}:${HTTP_PASSWORD}"
volumes:
- /var/run/docker.sock:/var/run/docker.sock:ro
- /etc/traefik:/etc/traefik
- /etc/docker/shared:/shared
networks:
traefik_proxy:
external:
name: traefik_proxy
Traefik.toml
nsecureSkipVerify = true
defaultEntryPoints = ["https", "http"]
# WEB interface of Traefik - it will show web page with overview of frontend and backend configurations
[api]
entryPoint = "traefik"
dashboard = true
address = ":8080"
# Force HTTPS
[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.http.redirect]
entryPoint = "https"
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
# Let's encrypt configuration
[acme]
email = "example#gmail.com" #any email id will work
storage="acme.json"
entryPoint = "https"
acmeLogging=true
onDemand = false #create certificate when container is created
[acme.dnsChallenge]
provider = "cloudflare"
delayBeforeCheck = 300
[[acme.domains]]
main = "example.com"
[[acme.domains]]
main = "*.example.com"
# Connection to docker host system (docker.sock)
[docker]
endpoint = "unix:///var/run/docker.sock"
domain = "example.com"
watch = true
# This will hide all docker containers that don't have explicitly
# set label to "enable"
exposedbydefault = false
Command I used to run the docker container execute by Drone:
docker container run -d --name example-development --restart=unless-
stopped --label "traefik.backend=example-development" --label
"traefik.frontend.rule=Host:subdomain.example.com" --label
"traefik.enable=false" --label "traefik.port=6611" --expose 6611
cloud.canister.io:5000/username/repo
My docker container is listening to http://127.0.0.1:6611
Above codes examples lead to Error 504 Gateway Timeout.

Answer 1

Traefik needs to have a common network with the containers it is connecting to. In this case, you need to run containers with --net=traefik_proxy.
If you're container is on multiple networks, you'll also need the label traefik.docker.network=traefik_proxy to tell traefik which of those networks to use.