kubernetes - G8 v1.16.13-gke.401中不提供K8S api cloud.google.com

Question

我正在尝试在GKE群集v1.16.13-gke.401上创建BackendConfig资源，但它给了我以下错误:

unable to recognize "backendconfig.yaml": no matches for kind "BackendConfig" in version "cloud.google.com/v1"

我已经使用 kubectl api-versions命令检查了可用的api，但是cloud.google.com不可用。如何启用它？
我想创建一个BackendConfig，并进行如下自定义健康检查:

apiVersion: cloud.google.com/v1
kind: BackendConfig
metadata:
  name: my-backendconfig
spec:
  healthCheck:
    checkIntervalSec: 8
    timeoutSec: 1
    healthyThreshold: 1
    unhealthyThreshold: 3
    type: HTTP
    requestPath: /health
    port: 10257

将此BackendConfig附加到这样的服务上:

apiVersion: v1
kind: Service
metadata:
  annotations:
    cloud.google.com/backend-config: '{"default": "my-backendconfig"}'

Answer 1

如评论中所述，问题是由于群集中缺少HTTP Load Balancing附加组件引起的。
使用所有默认设置创建GKE集群时，将启用HTTP Load Balancing之类的功能。

The HTTP Load Balancing add-on is required to use the Google Cloud Load Balancer with Kubernetes Ingress. If enabled, a controller will be installed to coordinate applying load balancing configuration changes to your GCP project

可以在 GKE documentation中找到更多详细信息。
为了进行测试，我创建了没有 Cluster-1附加组件的 HTTP Load Balancing。没有 BackendConfig CRD- Custom Resource Definition。

The CustomResourceDefinition API resource allows you to define custom resources. Defining a CRD object creates a new custom resource with a name and schema that you specify. The Kubernetes API serves and handles the storage of your custom resource. The name of a CRD object must be a valid DNS subdomain name.

没有 BackendConfig和没有 cloud apiVersion，如下所示

user@cloudshell:~ (k8s-tests-XXX)$ kubectl get crd | grep backend
user@cloudshell:~ (k8s-tests-XXX)$ kubectl api-versions | grep cloud

我无法创建任何 BackendConfig。

user@cloudshell:~ (k8s-tests-XXX) $ kubectl apply -f bck.yaml
error: unable to recognize "bck.yaml": no matches for kind "BackendConfig" in version "cloud.google.com/v1"

要使其工作，必须启用HTTP Load Balancing 。可以通过UI或命令来实现。
使用用户界面:

Navigation Menu > Clusters > [Cluster-Name] > Details > Clikc onEdit > Scroll down to Add-ons and expand > Find HTTP load balancing and change from Disabled to Enabled.

或命令:

gcloud beta container clusters update <clustername> --update-addons=HttpLoadBalancing=ENABLED --zone=<your-zone>

$ gcloud beta container clusters update cluster-1 --update-addons=HttpLoadBalancing=ENABLED --zone=us-central1-c
WARNING: Warning: basic authentication is deprecated, and will be removed in GKE control plane versions 1.19 and newer. For a list of recommended authentication methods, see: https://cloud.google.com/kubernetes-engine/docs/how-to/api-server-authentication

一段时间后，启用附加组件时:

$ kubectl get crd | grep backend
backendconfigs.cloud.google.com             2020-10-23T13:09:29Z
$ kubectl api-versions | grep cloud
cloud.google.com/v1
cloud.google.com/v1beta1
$ kubectl apply -f bck.yaml 
backendconfig.cloud.google.com/my-backendconfig created