PathPrefix shows no effect

Traefik Traefik v2
1

Hello dear friends of Traefik.
Once again I have problems with a configuration.
95% of the time it's because I just don't see the little errors. Once it took me half a day to realise that I had used ' instead of `. I'm getting old.

This time I would like to forward a directory to another server. So I installed a web service and also PGadmin to manage the database and I want Traefik to redirect it accordingly.

Here is my dynamic V2 configuration.

http:
  routers:
    mywebservice-pgadmin-router-https:
      entryPoints:
        - "https"
      rule: "Host(`mywebservice.mydomain.net`) && PathPrefix(`/pgadmin`)"
      service: service-mywebservice-pgadmin
      priority: 1
      tls:
        certResolver: letsEncrypt

    mywebservice-router-https:
      entryPoints:
        - "https"
      rule: "Host(`mywebservice.mydomain.net`)"
      service: service-mywebservice
      priority: 2
      tls:
        certResolver: letsEncrypt

  services:
    service-mywebservice:
      loadBalancer:
        serversTransport: mywebservice-transport
        servers:
          - url: "https://myinternwebservice.local:8443"

    service-mywebservice-pgadmin:
      loadBalancer:
        serversTransport: mywebservice-transport
        servers:
          - url: "http://myinternwebservice.local:5050"

  serversTransports:
    mywebservice-transport:
      insecureSkipVerify: true
      disableHTTP2: true
      serverName: "myinternwebservice.local"

Unfortunately it does not work. It is still redirected on the web service, where of course the directory does not exist. There is also no error message.
I used PathPrefix because I understood that you don't have to use regular expressions to forward all the following characters to pgadmin.
Where have I done something wrong here?

Many thanks
Sven

2

Sometime the application will have to have some configuration for a path prefix.

You can try adding the stripPrefix middleware to the router. Some applications will work with just this.

Check the forum here and see if anyone else has posted a configuration with pgadmin and a PathPrefix router.

3

I think your priorities are vice-verca:
https://doc.traefik.io/traefik/routing/routers/#priority

"To avoid path overlap, routes are sorted, by default, in descending order using rules length."

So your mywebservice-router-https router is picked even if the PathPrefix is /pgadmin.

You could omit the priority value on both routers to fix this (by default the priority is the amount of characters of the rule)

1 Like
4

Not my question, but thanks for the long answer!

I didn't know and was already wondering how it works :smile: