skaffold/kaniko: Get access to service from another namespace

Question

I've deployed a registry service into a namespace registry:

$ kubectl get service -n registry
NAME                       TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)    AGE
registry-docker-registry   ClusterIP   10.43.119.11   <none>        5000/TCP   18h

this is my skaffold.yaml:

apiVersion: skaffold/v2beta1
kind: Config
metadata:
  name: spring-boot-slab
build:
  artifacts:
  - image: skaffold-covid-backend
    kaniko:
      dockerfile: Dockerfile-multistage
      cache: {}
  cluster: {}
deploy:
  kubectl:
    manifests:
    - k8s/*

Everything works fine, up to when kaniko is trying to push the image to above registry:

Get "http://registry-docker-registry.registry.svc.cluster.local:5000/v2/": dial tcp: lookup registry-docker-registry.registry.svc.cluster.local on 127.0.0.53:53: no such host

Any ideas about how to get access to this registry deployed inside the same kubernetes?

I've tried to get access to the registry from another pod:

$ kubectl exec -ti graylog-1 -- curl registry-docker-registry.registry:5000/v2/_catalog
{"repositories":["skaffold-covid-backend","skaffold-covid-backend/cache"]}

As you can see, it's able to get access to registry.

add content of /etc/resolv.conf file from the pod from which you are doing lookup. and add output of kubectl get pods -n kube-system — Arghya Sadhu, Apr 12 '20 at 13:45

V. Mokrecov · Answer 1 · 2020-04-12T14:15:36.423

0

According to this instruction, you can get access to:

registry-docker-registry.registry

or according to the instructions:

registry-docker-registry.registry.svc.cluster.local

edited Apr 12 '20 at 14:15

answered Apr 12 '20 at 13:53

V. Mokrecov

1,014
1
11
20

score 0 · Answer 2 · answered Apr 12 '20 at 14:52

You can try to exec a pod in your intended namespace and try to curl the service that you want to reach as well as its port. The format in general is:

<your-service>.<your-namespace>

So from your intended pod you can curl it using the following command:

curl <your-service>.<your-namespace>:<your-port>

Try to port forward your service to your local using the following command:

kubectl -n <namespace> svc/<your-service> <your-localhost-port>:<your-service-port>

See whether you can access it this way.

Dashrath Mundkar · Answer 3 · 2020-04-12T15:41:27.027

0

Try something like this. I hope this command will work.

registry-docker-registry.registry.svc.cluster.local

edited Apr 12 '20 at 15:41

answered Apr 12 '20 at 15:05

Dashrath Mundkar

7,956
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skaffold/kaniko: Get access to service from another namespace

3 Answers3