404 Error after setting Ingress pathSuffix

JupyterHub
1

I am attempting to have the ingress-nginx controller route requests to certain namespace based on the suffix of the URL. For instance .com/namespace1 would point users to namespace1 in a GKE cluster.

I have ingress enabled in my Z2JH Helm chart.

ingress:
  enabled: true
  hosts:
    - "<NAME>.com"
  pathSuffix:
    "${class-section}"
  annotations: 
    kubernetes.io/ingress.class: "nginx"

The pathSuffix is currently just passing in a substitution variable in Terraform but seems to be working properly, this is used within a for_each type loop so that each ingress object has it’s own unique pathSuffix that relates to the namespace that the ingress is in.

Running kubectl describe ingress -n namespace1 gives the output of

Rules:
  Host                       Path  Backends
  ----                       ----  --------
  <NAME>.com
                             /namespace1   proxy-public:80 (11.1.1.29:8000)
Annotations:                 kubernetes.io/ingress.class: nginx
                                     meta.helm.sh/release-name: jupyterhub
                                     meta.helm.sh/release-namespace: namespace1

Then running kubectl describe ingress -n namespace2

Rules:
  Host                       Path  Backends
  ----                       ----  --------
  <NAME>.com
                             /namespace2   proxy-public:80 (11.1.1.30:8000)
Annotations:                 kubernetes.io/ingress.class: nginx
                             meta.helm.sh/release-name: jupyterhub
                             meta.helm.sh/release-namespace: namespace2

If I attempt to access .com or .com/namespace1 I get a 404 Not Found nginx.

If I do not use a pathSuffix input then I am able to access just .com

I am not sure what else I am missing.

Edit: I do have the proxy service set as a type of ClusterIP.

proxy:
  secretToken:
  service:
    type: ClusterIP

Does this need to be a NodePort?

2

Hi! Could you show us your full Z2JH config, with secrets redacted?

3

Here you go.

proxy:
  secretToken:
  service:
    type: ClusterIP

ingress:
  enabled: true
  hosts:
    - ""
  # pathSuffix:
  #   "${class-section}"
  annotations: 
    kubernetes.io/ingress.class: "nginx"

hub:
  config:
    Authenticator:
      admin_users:
      allowed_users:
    DummyAuthenticator:
      password: 
    JupyterHub:
      authenticator_class:
singleuser:
  defaultUrl: "/lab"

scheduling:
  userScheduler:
    enabled: false
  podPriority:
    enabled: false
  userPlaceholder:
    enabled: true
    replicas: 2
  userPods:
    nodeAffinity:
      matchNodePurpose: require

cull:
  enabled: true
  timeout: 3600
  every: 3600
4

Can you try setting hub.baseUrl to match your suffix?

5

Sure, so just so I understood I would do something like this.

ingress:
   pathSuffix:
      /namespace1

hub:
   baseUrl: /namespace1
1 Like
6

Thanks @maniacs, I was able to get this to work. I only set hub.baseUrl to /namespace1 and can access website.com/namespace1 and see a kubectl events log in that namespace.

Is it necessary to set pathSuffix? I had noticed in another post from you that it wasn’t necessary to set. When exactly would you use this pathSuffix field? Trouble configuring Ingress for Helm Chart - #2 by manics

Now I’ve come across another issue with actually getting an environment stood up and get an error about Spawn failed: Server at http://<IP>:8888/namespace1/user/admin2/ didn't respond in 30 seconds. I am attempting to login as admin2 and using the dummy authenticator.

7

You shouldn’t need to set pathSuffix, hub.baseUrl configures JupyterHub and also the ingress.

The documentation on this is quite brief and I’ve never had to use it:

Suffix added to Ingress’s routing path pattern.
Specify * if your ingress matches path by glob pattern.

1 Like