Kubectl apply 命令用于更新现有服务资源

Question

Currently I'm using Kubernetes version 1.11.+. Previously I'm always using the following command for my cloud build scripts:

- name: 'gcr.io/cloud-builders/kubectl'
  id: 'deploy'
  args:
  - 'apply'
  - '-f'
  - 'k8s'
  - '--recursive'
  env:
  - 'CLOUDSDK_COMPUTE_ZONE=${_REGION}'
  - 'CLOUDSDK_CONTAINER_CLUSTER=${_CLUSTER_NAME}'

And the commands just working as expected, at that time I'm using k8s version 1.10.+. However recently I got the following error:

• spec.clusterIP: Invalid value: "": field is immutable
• metadata.resourceVersion: Invalid value: "": must be specified for an update

So I'm wondering if this is an expected behavior for Service resources?

Here's my YAML config for my service:

apiVersion: v1
kind: Service
metadata:
  name: {name}
  namespace: {namespace}
  annotations:
    beta.cloud.google.com/backend-config: '{"default": "{backend-config-name}"}'
spec:
  ports:
   - port: {port-num}
     targetPort: {port-num}
  selector:
    app: {label}
    environment: {env}
type: NodePort

Answer 1

This is due to https://github.com/kubernetes/kubernetes/issues/71042

https://github.com/kubernetes/kubernetes/pull/66602 should be picked to 1.11

Answer 2

I sometimes meet this error when manually running kubectl apply -f somefile.yaml . I think it happens when someone have changed the specification through the Kubernetes Dashboard instead of by applying new changes through kubectl apply .

To fix it, I run kubectl edit services/servicename which opens the yaml specification in my default editor. Then remove the fields metadata.resourceVersion and spec.clusterIP , hit save and run kubectl apply -f somefile.yaml again.

Answer 3

You need to set the spec.clusterIP on your service yaml file with value to be replaced with clusterIP address from service as shown below:

spec:
  clusterIP:

Your issue is discuused on the following github there as well a workaround to help you bypass this issue.