# 全局Kubernetes设置

我们在这里可以配置k8s集群参数。

上游绑定到k8s服务,以及集群网关绑定k8s,都需要先在这里进行配置。

下面我们来配置一个k8s集群。

首先点击Add Kubernetes Cluster 按钮。

给k8s集群起个名字。填写好k8s集群的主机名和端口信息,以及是否验证,和token后点击创建。

k8s集群配置创建成功。

我们连接k8s需要以下权限:

  1. namespace的读取权限: get, list, watch
  2. service的读取权限: get, list, watch
  3. endpoint的读取权限: get, list, watch
  4. pod的读取权限: get, list, watch

k8s使用token来鉴权并获取权限,下面我们介绍如何得到一个拥有以上k8s权限的token。

创建token.yaml文件

apiVersion: v1
kind: ServiceAccount
metadata:
  name: openresty-edge-serviceaccount
  namespace: default

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: openresty-edge-clusterrole
rules:
  - apiGroups:
      - ""
    resources:
      - namespaces
      - services
      - endpoints
      - pods
    verbs:
      - get
      - list
      - watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: openresty-edge-clusterrole-binding
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: openresty-edge-clusterrole
subjects:
  - kind: ServiceAccount
    name: openresty-edge-serviceaccount
    namespace: default

执行以下命令获取token

$ kubectl apply -f token.yml
$ kubectl describe secret $(kubectl get secret | grep openresty-edge-serviceaccount | awk '{print $1}') | grep "token: " | awk '{print $2}'
eyJhbGciOiJSUzI1NiIsImtpZCI6InJOZkJvNWItMDhYOXBfUGw2czBleWxNWXZBWi1KOXFqQ05GdjVCWUdpc3cifQ.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.I0x3A0Z1Oe_WQVKtCooYqas6JcQbvSxd0sFpFLecLT4vACDFyB3TsxAoVg1WPIzIue-VXoWUSij9Fa-RCHM_5k_mbY9nyuaJDjq8ziMZdlOHHRcgoACcCjUIK_2-o0D8PaNpHs5X3JZYmbQTXMMjs81Sd0sNsSJ2XIvhwN4Qkg9FCngFxPf_xBWYUh8EbMALde53GyB3LgKwgXu_538skCvoH2SGWXCr6oYc7W1wngHrrmy7Wzq_NlTlL-hQtEz9ST8Rik1zHbItrfQpgmW4d2UOrZ6IL91ZpKDGNS4gNt7pJ8opEvMascg92O28H9Y9kAIgJtOZFBHSQl10DADHBw