全域性 Kubernetes 設定

我們在這裡可以配置 k8s 叢集引數。

上游繫結到 k8s 服務，以及叢集閘道器繫結 k8s，都需要先在這裡進行配置。

下面我們來配置一個 k8s 叢集。

首先點選 Add Kubernetes Cluster 按鈕。

給 k8s 叢集起個名字。填寫好 k8s 叢集的主機名和埠資訊，以及是否驗證，和 token 後點選建立。

k8s叢集配置建立成功。

我們連線 k8s 需要以下許可權：

1. namespace的讀取許可權: get, list, watch
2. service的讀取許可權: get, list, watch
3. endpoint的讀取許可權: get, list, watch
4. pod的讀取許可權: get, list, watch

k8s使用 token 來鑑權並獲取許可權，下面我們介紹如何得到一個擁有以上 k8s 許可權的 token 。

建立 token.yaml 檔案

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

執行以下命令獲取token

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