Reroutig issue if only using traefik 2 as reverse proxy

Traefik Traefik v2 (latest)
1

Dear developers, team members, community members,

I am very sorry to bother you. I go crazy...

Isn't it possible - if I only use traefik locally - to reroute a sub path to pgadmin?... while the api still stays there at the configured prefix?

This doesn't lead to a priority issue right if different subpat prefixes are used?

I want localhost:81/pgadmin (fully working)
and localhost:81/api/v1/....... (wich already works)

I have following docker-compose file:

version: '3'

services:
  traefik:
    image: "traefik:v2.2"
    container_name: "traefik"
    command:
      #- "--log.level=DEBUG"
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=true"
      - "--entrypoints.web.address=:81"
    ports:
      - "81:81"
      - "8080:8080"
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock:ro"

  api:
    labels:
      - traefik.http.routers.api.rule=PathPrefix(`/api`)
    image: sp33c/python:3.7
    ports:
      - 8081:5000
    container_name: api
    volumes:
      - .:/app
    command: "./production.sh"

  postgres:
    image: postgres:12.0-alpine
    environment:
      - POSTGRES_PASSWORD=dbpasswd
      - POSTGRES_USER=dbuser
      - POSTGRES_DB=appdb
      - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - .:/var/lib/postgresql/data
    container_name: postgres

  pgadmin:
    image: dpage/pgadmin4
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.pgadmin.rule=PathPrefix(`/pgadmin`)"
      - "traefik.http.middlewares.pgadmin.stripprefix.prefixes=/pgadmin"
      - "traefik.http.middlewares.pgadmin.stripprefix.forceslash=false"
    environment:
      - PGADMIN_DEFAULT_EMAIL=info@xxxx.tech
      - PGADMIN_DEFAULT_PASSWORD=xxxxx
    volumes:
      - ./servers.json:/pgadmin4/servers.json
    ports: 
      - 8082:80
    container_name: pgadmin

Do you know what I do wrong?
warm regards,
Alex

2

Welcome @afitterling

You don't really specify what is not working for you.

The api service does not have traefik.enable=true set. Do that could be one thing that is an issue.

There is a section on pgAdmin for reverse proxying pgadmin and it has a section on traefik!

It looks like you need to specify another environment variable:

SCRIPT_NAME=/pgadmin

3

Thank you. Also for pointing out I was not precise. What did not work was pgadmin was not reachable under /pgadmin only the api under its appropriate route. I could see however in the logs, that the problem was related to flask inside pgadmin. So the service was triggered but not working or misconfigured.

This works now:
Thank you so much!!!

the - "traefik.enable=true" is not needed because of auto discover.

my docker-compose.yml:


``
version: '3'

services:
  traefik:
    image: "traefik:v2.2"
    container_name: "traefik"
    command:
      #- "--log.level=DEBUG"
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=true"
      - "--entrypoints.web.address=:81"
    ports:
      - "81:81"
      - "8080:8080"
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock:ro"
      #- "./traefik.toml:/etc/traefik/traefik.toml" 
      #- "./traefik.yaml/:/etc/traefik/traefik.yaml"

  api:
    labels:
      #- "traefik.enable=true"
      - traefik.http.routers.api.rule=PathPrefix(`/api`)
    image: sp33c/python:3.7
    ports:
      - 8081:5000
    container_name: api
    volumes:
      - .:/app
    command: "./production.sh"

  postgres:
    image: postgres:12.0-alpine
    environment:
      - POSTGRES_PASSWORD=dbpasswd
      - POSTGRES_USER=dbuser
      - POSTGRES_DB=appdb
      - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - .:/var/lib/postgresql/data
    container_name: postgres

  pgadmin:
    image: dpage/pgadmin4
    labels:
      #- "traefik.enable=true"
      - "traefik.http.routers.pgadmin.rule=PathPrefix(`/pgadmin`)"
      - "traefik.http.middlewares.pgadmin.stripprefix.prefixes=/pgadmin"
      - "traefik.http.middlewares.pgadmin.stripprefix.forceslash=false"
    environment:
      - PGADMIN_DEFAULT_EMAIL=info@sp33c.tech
      - PGADMIN_DEFAULT_PASSWORD=prinus
      - SCRIPT_NAME=/pgadmin
    volumes:
      - ./servers.json:/pgadmin4/servers.json
    ports: 
      - 8082:80
    container_name: pgadmin


``
4

Indeed, I was too quick in skimming it. I saw traefik.enable in the pgdmin service and made an assumption - "--providers.docker.exposedbydefault=true" was set to false!