Can not access dashboard with traefik in docker swarm

decypher_the_world · September 10, 2021, 7:53am

I am unable to access the dashboard with the following docker-compose.yaml

version: '3.9'

services:
  traefik:
    image: traefik:v2.4
    ports:
      - target: 80
        published: 80
        mode: host
      - target: 443
        published: 443
        mode: host
      - target: 8080
        published: 8080
        mode: host
    deploy:
      placement:
        constraints:
          - node.labels.traefik.traefik-certificates == true

    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - traefik-certificates:/certificates
    env_file:
      - ./.env.traefik
    command:
      - "--providers.docker.constraints=Label(`traefik.constraint-label`, `traefik`)"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--providers.docker.swarmMode=true"
      - "--entrypoints.http.address=:80"
      - "--entrypoints.https.address=:443"
      - "--certificatesresolvers.le.acme.dnschallenge=true"
      - "--certificatesresolvers.le.acme.dnschallenge.provider=cloudflare"
      - "--certificatesresolvers.le.acme.email=first.last@email.com"
      - "--certificatesresolvers.le.acme.storage=/certificates/acme.json"
      - "--log.level=DEBUG"
      - "--accesslog=true"
      - "--api=true"
      - "--api.dashboard=true"
      - "traefik.enable=true"
      - "traefik.docker.network=traefik"
      - "traefik.constraint-label=traefik"
      #- "traefik.http.routers.traefik-http.rule=Host(`proxy.example.com`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`))"
      - "traefik.http.routers.traefik-http.rule=Host(`proxy.example.com`)"
      - "traefik.http.routers.traefik-http.entrypoints=http"
      - "traefik.http.routers.traefik-http.middlewares=https-redirect"
      - "traefik.http.routers.traefik-https.middlewares=admin-auth"
      - "traefik.http.middlewares.https-redirect.redirectscheme.scheme=https"
      - "traefik.http.middlewares.https-redirect.redirectscheme.permanent=true"
      - "traefik.http.middlewares.admin-auth.basicauth.users=test1:$$apr1$$rd0qto3i$$mWrcrfrRfrEkgPVZ3w1,test2:$$apr1$$1smybfkx$$qsrcrfTyejEn12LKmbNMC."
      #- "traefik.http.routers.traefik-https.rule=Host(`proxy.example.com`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`))"
      - "traefik.http.routers.traefik-https.rule=Host(`proxy.example.com`)"
      - "traefik.http.routers.traefik-https.entrypoints=https"
      - "traefik.http.routers.traefik-https.tls=true"
      - "traefik.http.routers.traefik-https.service=api@internal"
      - "traefik.http.routers.traefik-https.tls.certresolver=le"
      - "traefik.http.services.traefik.loadbalancer.server.port=8080"
    networks:
      - traefik_network

volumes:
  traefik-certificates:

networks:
  traefik_network:
    external: 
      name: traefik_network

letsencrypt works fine but here are the few issues going on

redirect from http to https not working
can not access dashboard on proxy.example.com or proxy.example.com/dashboard or proxy.example.com:8080/dashboard everything all showing 404 page

what do i have wrong and how do i fix?

cakiwi · September 10, 2021, 11:25am

Hi @decypher_the_world

You have put all the label in the command: block instead of under labels:

It looks okay to me once you have done that. If you intend to be https only then using entrypoint redirection will reduce the amount of labels you are using.

https://doc.traefik.io/traefik/routing/entrypoints/#redirection

decypher_the_world · September 10, 2021, 12:03pm

i had them separate and had same issue...so am not sure if its because of command with label
i ended up combining them because that worked in a docker setup i had, but this is docker swarm

i will split back to command and labels and repost with same issue

decypher_the_world · September 10, 2021, 12:18pm

ok here is command and labels split and same error

version: '3.9'

services:
  traefik:
    image: traefik:v2.4
    ports:
      - target: 80
        published: 80
        mode: host
      - target: 443
        published: 443
        mode: host
      - target: 8080
        published: 8080
        mode: host
    deploy:
      placement:
        constraints:
          - node.labels.traefik.traefik-certificates == true

    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - traefik-certificates:/certificates
    env_file:
      - ./.env.traefik
    command:
      - "--providers.docker.constraints=Label(`traefik.constraint-label`, `traefik`)"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--providers.docker.swarmMode=true"
      - "--entrypoints.http.address=:80"
      - "--entrypoints.https.address=:443"
      - "--certificatesresolvers.le.acme.dnschallenge=true"
      - "--certificatesresolvers.le.acme.dnschallenge.provider=cloudflare"
      - "--certificatesresolvers.le.acme.email=first.last@email.com"
      - "--certificatesresolvers.le.acme.storage=/certificates/acme.json"
      - "--log.level=DEBUG"
      - "--accesslog=true"
      - "--api=true"
      - "--api.dashboard=true"
    labels:
      - "traefik.enable=true"
      - "traefik.docker.network=traefik_network"
      - "traefik.constraint-label=traefik"
      #- "traefik.http.routers.traefik-http.rule=Host(`proxy.example.com`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`))"
      - "traefik.http.routers.traefik-http.rule=Host(`proxy.example.com`)"
      - "traefik.http.routers.traefik-http.entrypoints=http"
      - "traefik.http.routers.traefik-http.middlewares=https-redirect"
      - "traefik.http.routers.traefik-https.middlewares=admin-auth"
      - "traefik.http.middlewares.https-redirect.redirectscheme.scheme=https"
      - "traefik.http.middlewares.https-redirect.redirectscheme.permanent=true"
      - "traefik.http.middlewares.admin-auth.basicauth.users=test1:$$apr1$$rd0qto3i$$mWrcrfrRfrEkgPVZ3w1,test2:$$apr1$$1smybfkx$$qsrcrfTyejEn12LKmbNMC."
      #- "traefik.http.routers.traefik-https.rule=Host(`proxy.example.com`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`))"
      - "traefik.http.routers.traefik-https.rule=Host(`proxy.example.com`)"
      - "traefik.http.routers.traefik-https.entrypoints=https"
      - "traefik.http.routers.traefik-https.tls=true"
      - "traefik.http.routers.traefik-https.service=api@internal"
      - "traefik.http.routers.traefik-https.tls.certresolver=le"
      - "traefik.http.services.traefik.loadbalancer.server.port=8080"
    networks:
      - traefik_network

volumes:
  traefik-certificates:

networks:
  traefik_network:
    external: 
      name: traefik_network

here are other details

# docker service ls

ID             NAME              MODE         REPLICAS   IMAGE          PORTS
yxmg1s9jho81   traefik_traefik   replicated   1/1        traefik:v2.4

# docker service ps traefik_traefik

ID             NAME                    IMAGE          NODE       DESIRED STATE   CURRENT STATE                 ERROR     PORTS
r8kc69tjagxx   traefik_traefik.1       traefik:v2.4   swarm-00   Running         Running about a minute ago              *:443->443/tcp,*:443->443/tcp,*:80->80/tcp,*:80->80/tcp,*:8080->8080/tcp,*:8080->8080/tcp

# docker ps

CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS                                                                                                                 NAMES
cf6c53466dd9   traefik:v2.4   "/entrypoint.sh '--p…"   4 minutes ago   Up 4 minutes   0.0.0.0:80->80/tcp, :::80->80/tcp, 0.0.0.0:443->443/tcp, :::443->443/tcp, 0.0.0.0:8080->8080/tcp, :::8080->8080/tcp   traefik_traefik.1.r8kc69tjagxxw0evpv1500tul

and some of the logs

# docker service logs -f traefik_traefik


| time="2021-09-10T12:15:29Z" level=info msg="Skipping same configuration" providerName=docker
| time="2021-09-10T12:15:44Z" level=debug msg="Filtering disabled container" providerName=docker container=traefik-traefik-r8kc69tjagxxw0evpv1500tul
| time="2021-09-10T12:15:44Z" level=debug msg="Configuration received from provider docker: {\"http\":{},\"tcp\":{},\"udp\":{}}" providerName=docker
| time="2021-09-10T12:15:44Z" level=info msg="Skipping same configuration" providerName=docker
| time="2021-09-10T12:15:59Z" level=debug msg="Filtering disabled container" providerName=docker container=traefik-traefik-r8kc69tjagxxw0evpv1500tul
| time="2021-09-10T12:15:59Z" level=debug msg="Configuration received from provider docker: {\"http\":{},\"tcp\":{},\"udp\":{}}" providerName=docker
| time="2021-09-10T12:15:59Z" level=info msg="Skipping same configuration" providerName=docker
| time="2021-09-10T12:16:14Z" level=debug msg="Filtering disabled container" providerName=docker container=traefik-traefik-r8kc69tjagxxw0evpv1500tul
| time="2021-09-10T12:16:14Z" level=debug msg="Configuration received from provider docker: {\"http\":{},\"tcp\":{},\"udp\":{}}" providerName=docker
| time="2021-09-10T12:16:14Z" level=info msg="Skipping same configuration" providerName=docker
| time="2021-09-10T12:16:29Z" level=debug msg="Filtering disabled container" container=traefik-traefik-r8kc69tjagxxw0evpv1500tul providerName=docker
| time="2021-09-10T12:16:29Z" level=debug msg="Configuration received from provider docker: {\"http\":{},\"tcp\":{},\"udp\":{}}" providerName=docker
| time="2021-09-10T12:16:29Z" level=info msg="Skipping same configuration" providerName=docker
| time="2021-09-10T12:16:44Z" level=debug msg="Filtering disabled container" providerName=docker container=traefik-traefik-r8kc69tjagxxw0evpv1500tul
| time="2021-09-10T12:16:44Z" level=debug msg="Configuration received from provider docker: {\"http\":{},\"tcp\":{},\"udp\":{}}" providerName=docker
| time="2021-09-10T12:16:44Z" level=info msg="Skipping same configuration" providerName=docker

cakiwi · September 10, 2021, 1:48pm

I'm pretty sure this is going to be related to the --providers.docker.constraints=Label(`traefik.constraint-label`, `traefik`)

Can you test without it? I've only really tried it once, and I think that was without swarm mode.

decypher_the_world · September 10, 2021, 1:55pm

ok will try with that

by the way following this setup, not exactly same but that is what am following
https://dockerswarm.rocks/traefik/

you can see --providers.docker.constraints=Label(traefik.constraint-label, traefik) under the Getting the client IP section

decypher_the_world · September 10, 2021, 2:00pm

ok commented --providers.docker.constraints=Label(traefik.constraint-label, traefik) and still 404
i am seeing requests made in logs so certainly the routing works, just not sure why dashboard or anything is not working

# docker service logs -f traefik_traefik

| time="2021-09-10T13:57:52Z" level=debug msg="Configuration received from provider docker: {\"http\":{},\"tcp\":{},\"udp\":{}}" providerName=docker
| time="2021-09-10T13:57:52Z" level=info msg="Skipping same configuration" providerName=docker
| 172.18.0.1 - - [10/Sep/2021:13:57:53 +0000] "GET / HTTP/2.0" - - "-" "-" 1 "-" "-" 0ms
| 172.18.0.1 - - [10/Sep/2021:13:57:58 +0000] "GET /dashboard HTTP/2.0" - - "-" "-" 2 "-" "-" 0ms

cakiwi · September 10, 2021, 2:37pm

dashboard needs to be suffixed with /

decypher_the_world · September 10, 2021, 2:43pm

still same 404

| 172.18.0.1 - - [10/Sep/2021:14:41:29 +0000] "GET /dashboard/ HTTP/2.0" - - "-" "-" 4 "-" "-" 0ms
| 172.18.0.1 - - [10/Sep/2021:14:41:34 +0000] "GET /dashboard/ HTTP/1.1" - - "-" "-" 5 "-" "-" 0ms

also redirect from http to https is not working as can be seen above "GET /dashboard/ HTTP/1.1" is http and "GET /dashboard/ HTTP/2.0" is https

cakiwi · September 10, 2021, 2:50pm

Sorry missed the most common one for swarm mode: Your labels are not nested under deploy:

Also consider changing the acceslog format to json. There is more rich infocation there.(CLF can be customised but json is easier to parse)

decypher_the_world · September 10, 2021, 2:56pm

Where is docs for swarm mode to next labels under deploy? There seems to be limited doc on swarm mode

How do i use JSON for access logs? Mind pointing me to the lines to change and from what to what? Will really appreciate it...thanks in advance

cakiwi · September 10, 2021, 3:02pm

The labels are in the site you linked earlier too.

  deploy:
     placement:
       constraints:
         # Make the traefik service run only on the node with this label
         # as the node with it has the volume for the certificates
         - node.labels.traefik-public.traefik-public-certificates == true
     labels:
       # Enable Traefik for this service, to make it available in the public network
       - traefik.enable=true
       # Use the traefik-public netwo

Swarm labels:

Access Log Format:

The option is missing in the doc though. Look in the static reference section.

--accesslog.format :
Access log format: json | common (Default: common )

decypher_the_world · September 10, 2021, 3:16pm

works now!!!
didn't realize the labels had to be nested under the deploy..thanks a lot for pointing that out..dashboard works now

thanks a lot...again

decypher_the_world · September 10, 2021, 4:02pm

@cakiwi

one last issue

i am only seeing this with the docker swarm setup

not seeing the 8080 traefik port

like the one here used for docker

not sure what else i missed

here is latest yaml

version: '3.9'

services:
  traefik:
    image: traefik:v2.4
    ports:
      - target: 80
        published: 80
        mode: host
      - target: 443
        published: 443
        mode: host
      - target: 8080
        published: 8080
        mode: host
    deploy:
      placement:
        constraints:
          - node.labels.traefik.traefik-certificates == true
      labels:
        - "traefik.enable=true"
        - "traefik.docker.network=traefik_network"
        - "traefik.constraint-label=traefik"
        - "traefik.http.routers.traefik-http.rule=Host(`proxy.example.com`)"
        - "traefik.http.routers.traefik-http.entrypoints=http"
        - "traefik.http.routers.traefik-http.middlewares=https-redirect"
        - "traefik.http.routers.traefik-https.middlewares=admin-auth"
        - "traefik.http.middlewares.https-redirect.redirectscheme.scheme=https"
        - "traefik.http.middlewares.https-redirect.redirectscheme.permanent=true"
        - "traefik.http.middlewares.admin-auth.basicauth.users=test1:$$apr1$$rd0qto3i$$mWrcrfrRfrEkgPVZ3w1,test2:$$apr1$$1smybfkx$$qsrcrfTyejEn12LKmbNMC."
        - "traefik.http.routers.traefik-https.rule=Host(`proxy.example.com`)"
        - "traefik.http.routers.traefik-https.entrypoints=https"
        - "traefik.http.routers.traefik-https.tls=true"
        - "traefik.http.routers.traefik-https.service=api@internal"
        - "traefik.http.routers.traefik-https.tls.certresolver=le"
        - "traefik.http.services.traefik.loadbalancer.server.port=8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - traefik-certificates:/certificates
    env_file:
      - ./.env.traefik
    command:
      - "--providers.docker.constraints=Label(`traefik.constraint-label`, `traefik`)"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--providers.docker.swarmMode=true"
      - "--entrypoints.http.address=:80"
      - "--entrypoints.https.address=:443"
      - "--certificatesresolvers.le.acme.dnschallenge=true"
      - "--certificatesresolvers.le.acme.dnschallenge.provider=cloudflare"
      - "--certificatesresolvers.le.acme.email=first.last@email.com"
      - "--certificatesresolvers.le.acme.storage=/certificates/acme.json"
      - "--log.level=DEBUG"
      - "--accesslog=true"
      - "--accesslog.format=json"
      - "--api=true"
      - "--api.dashboard=true"
    networks:
      - traefik_network

volumes:
  traefik-certificates:

networks:
  traefik_network:
    external: 
      name: traefik_network

cakiwi · September 10, 2021, 4:08pm

You'd need to add it alongside these ones, if you used --api.insecure that automatically creates the entrypoint.

decypher_the_world · September 10, 2021, 4:18pm

perfect - "--api.insecure=true" did the trick

thanks

cakiwi · September 10, 2021, 5:48pm

Of course it also makes it.... insecure

system · September 13, 2021, 5:49pm

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