Ingress-dns addon now working as expected for multinode clusters

[fbyrne]

What Happened?

When in multi-node cluster mode the ingress-dns pod is not scheduled on the primary node leading to the errors setting up on the get started guide.

Steps to reproduce:

1. minikube start -n 3 --addons=ingress,ingress-dns
2. follow the steps in the ingress-dns guide
3. do a dns lookup on the running service nslookup hello-jane.test $(minikube ip)

Expected: the nslookup succeeds
Actual: the dns lookup fails with communication error: connection refused.

Attach the log file

N/A

Operating System

Ubuntu

Driver

Docker

[eugenwintersberger]

I can confirm that behavior. A quick fix was to modify the ingress-dns template (see the last to lines of the following snippet):

spec:
  serviceAccountName: minikube-ingress-dns
  hostNetwork: true
  containers:
    - name: minikube-ingress-dns
      image: {{.CustomRegistries.IngressDNS | default .ImageRepository | default .Registries.IngressDNS }}{{.Images.IngressDNS}}
      imagePullPolicy: IfNotPresent
      ports:
        - containerPort: 53
          protocol: UDP
      env:
        - name: DNS_PORT
          value: "53"
        - name: POD_IP
          valueFrom:
            fieldRef:
              fieldPath: status.podIP
  nodeSelector:
    minikube.k8s.io/primary: "true"

With these modification the ingress-dns addon works on a multi-node cluster too. I am not certian if this is a good solution and should become an PR. Any thought on this?

[fbyrne]

I've submitted #17649 as a fix

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

In response to this:

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This bot triages issues according to the following rules:

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/close not-planned

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