Traefik doen't route to the appropriate container - docker

Question

I'm trying to use traefik with my docker containers for routing.
File structure is:
docker
├── docker-compose.yml
├── shared
│   └── .htpasswd
└── traefik
├── acme
│   └── acme.json
├── rules.toml
└── traefik.toml
Here is traefik.toml:
logLevel = "ERROR"
InsecureSkipVerify = true
defaultEntryPoints = ["https", "http"]
[web]
address = ":8080"
[web.auth.basic]
usersFile = "/shared/.htpasswd"
# Force HTTPS
[entryPoints]
[entryPoints.http]
address = ":80"
[entryPoints.http.redirect]
entryPoint = "https"
[entryPoints.https]
address = ":443"
[entryPoints.https.tls]
[retry]
[file]
watch = true
filename = "/etc/traefik/rules.toml"
[acme]
email = "test#test.com"
storage="/etc/traefik/acme/acme.json"
entryPoint = "https"
acmeLogging=true
onDemand = false #create certificate when container is created
[acme.dnsChallenge]
provider = "digitalocean"
delayBeforeCheck = 0
[[acme.domains]]
main = "test.com"
[[acme.domains]]
main = "*.test.com"
[docker]
endpoint = "unix:///var/run/docker.sock"
domain = "test.com"
watch = true
exposedbydefault = false
docker-compose.yml:
version: "3.5"
services:
traefik:
hostname: traefik
image: traefik:latest
container_name: traefik
restart: always
domainname: ${DOMAINNAME}
networks:
- default
- traefik_proxy
ports:
- "80:80"
- "443:443"
#- "8080:8080"
environment:
#- digitalocean=${DO_AUTH_TOKEN}
- DO_AUTH_TOKEN=${DO_AUTH_TOKEN}
labels:
- "traefik.enable=true"
- "traefik.backend=traefik"
- "traefik.frontend.rule=Host:traefik.${DOMAINNAME}"
# - "traefik.frontend.rule=Host:${DOMAINNAME}; PathPrefixStrip: /traefik"
- "traefik.port=8080"
- "traefik.docker.network=traefik_proxy"
volumes:
- /var/run/docker.sock:/var/run/docker.sock:ro
- ${USERDIR}/docker/traefik:/etc/traefik
- ${USERDIR}/docker/shared:/shared
networks:
traefik_proxy:
external:
name: traefik_proxy
default:
driver: bridge
After running traefik container I'm trying to create another one from the repository:
docker run -d \
-v /var/run/docker.sock:/var/run/docker.sock \
--label traefik.backend=hello-hapi \
--label traefik.frontend.rule=Host:hello-hapi.test.com \
--label traefik.docker.network=traefik_proxy \
--label traefik.port=80 \
--name hello_hapi \
gitlab.test.com:5555/myuser/hello_hapi:latest
The problem is that I can not access the container through the browser. It prints: hello-hapi.test.com’s server IP address could not be found (ERR_NAME_NOT_RESOLVED).
But the image can be seen in the traefik dashboard and
docker run -it -p 3000:3000 --rm gitlab.test.com:5555/myuser/hello_hapi:latest
runs as expected on test.com:3000
What could be the problem?

Answer 1

Your browser is checking the DNS zone for "test.com" and then in that zone there is no "hello-hapi.test.com" entry.
You need to own the domain in order to add DNS entries for it. If that wasn't the case, I could have my domain as "neekoy.google.com", which Google wouldn't be particularly happy about.
If you want to access it in a browser, you can add a local DNS entry on your computer and point "test.com" to localhost(127.0.0.1). If you don't know how, you can Google "hosts file" for your operating system and add the following line in it:
127.0.0.1 hello-hapi.test.com test.com www.test.com