如何使用http访问k8s apiserver?用ab检查k8s apiserver请求限制

1.创建 ClusterRole

您需要创建一个 ClusterRole，以授予 Service Account 在集群范围内的权限

# cluster-role.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: pod-reader
rules:
- apiGroups: [""]
  resources: ["pods"]
  verbs: ["get", "list", "watch"]

保存文件后，执行kubectl create -f cluster-role.yaml

2. 创建 ClusterRoleBinding

# cluster-role-binding.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: pod-reader-binding
subjects:
- kind: ServiceAccount
  name: my-service-account
  namespace: default
roleRef:
  kind: ClusterRole
  name: pod-reader
  apiGroup: rbac.authorization.k8s.io
 

 保存文件后，执行kubectl create -f cluster-role-binding.yaml

3、生成token

k8s1.24及以上版本使用kubectl create token my-service-account生成token

之前的k8s版本需要生成sa,自动创建secret，secret里带token

# 获取 Token TOKEN=$(kubectl create token my-service-account)

# 发送请求 curl -k -H "Authorization: Bearer $TOKEN" https://<k8s-api-server-ip>:6443/api/v1/pods

4、来用ab检查下apiserver的请求吧，可以算出集群请求的qps限制

 ab -n 1000 -c 40 -k -H "Authorization: Bearer 生成的token" -H "Accept: application/json" https://1.1.1.16443/api/v1/pods