Hey!
Similar to an issue, that was unfortunately closed without an answer, I ran into a problem that I'm currently not able to solve myself:
I wanted to add a graphite/statsd service to my swarm which could later be used to get metrics from traefik itself. Adding the service works fine and it is picked up by traefik, however, the IP address is off by one.
I know that a lot of times a wrong IP address comes up, the culprit is the wrong docker network. However, the network seems to be correct:
Inspect Output of Service
"Endpoint": {
"Spec": {
"Mode": "vip"
},
"VirtualIPs": [
{
"NetworkID": "y1q27t0bdvx05e8ul2dpj0piv",
"Addr": "10.0.1.61/24"
}
]
}
Dashboard Service View
Both services (traefik and graphite) are defined in the same docker-compose file and deployed as one stack.
Services from other Stacks are picked up correctly by traefik with their correct IP addresses.
Am I overlooking something really simple here or is this unexpected behaviour?
Thanks a lot in advance!
The complete docker-compose.yml:
version: '3.3'
services:
traefik:
# Use the latest v2.7.x Traefik image available
image: traefik:v2.7
ports:
# Listen on port 80, default for HTTP, necessary to redirect to HTTPS
- 80:80
# Listen on port 443, default for HTTPS
- 443:443
deploy:
placement:
constraints:
# Only deploy traefik to the manager node as it has the certificate volume
# TODO: Use a specific node id if there are multiple managers
- node.role == manager
labels:
# Enable Traefik for this service, to make it available in the public network
traefik.enable: "true"
# Use the traefik-public network (declared below)
traefik.docker.network: traefik-public
# Use the custom label "traefik.constraint-label=traefik-public"
# This public Traefik will only use services with this label
# That way you can add other internal Traefik instances per stack if needed
traefik.constraint-label: traefik-public
# admin-auth middleware with HTTP Basic auth
# Using the environment variables USERNAME and HASHED_PASSWORD
traefik.http.middlewares.admin-auth.basicauth.users: ${USERNAME_AND_HASHED_PASSWORD?Variable not set}
# https-redirect middleware to redirect HTTP to HTTPS
# It can be re-used by other stacks in other Docker Compose files
traefik.http.middlewares.https-redirect.redirectscheme.scheme: https
traefik.http.middlewares.https-redirect.redirectscheme.permanent: "true"
# traefik-http set up only to use the middleware to redirect to https
# Uses the environment variable DOMAIN
traefik.http.routers.traefik-public-http.rule: Host(`${DOMAIN?Variable not set}`)
traefik.http.routers.traefik-public-http.entrypoints: http
traefik.http.routers.traefik-public-http.middlewares: https-redirect
# traefik-https the actual router using HTTPS
# Uses the environment variable DOMAIN
traefik.http.routers.traefik-public-https.rule: Host(`${DOMAIN?Variable not set}`)
traefik.http.routers.traefik-public-https.entrypoints: https
traefik.http.routers.traefik-public-https.tls: "true"
# Use the special Traefik service api@internal with the web UI/Dashboard
traefik.http.routers.traefik-public-https.service: api@internal
# Use the "le" (Let's Encrypt) resolver created below
traefik.http.routers.traefik-public-https.tls.certresolver: le
# Enable HTTP Basic auth, using the middleware created above
traefik.http.routers.traefik-public-https.middlewares: admin-auth
# Define the port inside of the Docker service to use
traefik.http.services.traefik-public.loadbalancer.server.port: 8080
volumes:
# Add Docker as a mounted volume, so that Traefik can read the labels of other services
- /var/run/docker.sock:/var/run/docker.sock:ro
# Mount the volume to store the certificates
- traefik-public-certificates:/certificates
command:
# Enable Docker in Traefik, so that it reads labels from Docker services
- --providers.docker
# Add a constraint to only use services with the label "traefik.constraint-label=traefik-public"
- --providers.docker.constraints=Label(`traefik.constraint-label`, `traefik-public`)
# Do not expose all Docker services, only the ones explicitly exposed
- --providers.docker.exposedbydefault=false
# Enable Docker Swarm mode
- --providers.docker.swarmmode
# Create an entrypoint "http" listening on port 80
- --entrypoints.http.address=:80
# Create an entrypoint "https" listening on port 443
- --entrypoints.https.address=:443
# Create the certificate resolver "le" for Let's Encrypt, uses the environment variable EMAIL
- --certificatesresolvers.le.acme.email=${EMAIL?Variable not set}
# Store the Let's Encrypt certificates in the mounted volume
- --certificatesresolvers.le.acme.storage=/certificates/acme.json
# Use the TLS Challenge for Let's Encrypt
- --certificatesresolvers.le.acme.tlschallenge=true
# Enable the access log, with HTTP requests
- --accesslog
# Enable the Traefik log, for configurations and errors
- --log
# Enable the Dashboard and API
- --api
networks:
# Use the public network created to be shared between Traefik and
# any other service that needs to be publicly available with HTTPS
- traefik-public
# Optional graphite + statsd
graphite:
image: graphiteapp/graphite-statsd
networks:
- traefik-public
deploy:
labels:
traefik.enable: "true"
traefik.docker.network: traefik-public
traefik.constraint-label: traefik-public
# HTTP requests, redirect to HTTPS
traefik.http.routers.graphite-public-http.rule: Host(`${DOMAIN?Variable not set}`) && Path(`/graphite`)
traefik.http.routers.graphite-public-http.entrypoints: http
traefik.http.routers.graphite-public-http.middlewares: https-redirect
# HTTPS requests, use a letsencrypt certificate
traefik.http.routers.graphite-public-https.tls.certresolver: le
traefik.http.routers.graphite-public-https.rule: Host(`${DOMAIN?Variable not set}`) && Path(`/graphite`)
traefik.http.routers.graphite-public-https.entrypoints: https
traefik.http.routers.graphite-public-https.tls: "true"
# Forward the traffic to the nginx inside the container
traefik.http.services.graphite-public.loadbalancer.server.port: 80
# add the same basic auth to graphite over HTTPS that we use for traefik itself
traefik.http.routers.graphite-public-https.middlewares: admin-auth
volumes:
# Create a volume to store the certificates, there is a constraint to make sure
# Traefik is always deployed to the same Docker node with the same volume containing
# the HTTPS certificates
traefik-public-certificates:
networks:
# Use the previously created public network "traefik-public", shared with other
# services that need to be publicly available via this Traefik
traefik-public:
external: true