Kubernetes DaemonSet 使用

kyaa111 1月前 ⋅ 54 阅读

需求如下:

某类pod需要在指定节点运行

且每个节点只能有一个pod运行

滚动更新时需保证可用性

---
apiVersion: v1
kind: Service
metadata:
  name: rbac-service
  labels:
    app: rbac-svc
spec:
  selector:
    app: rbac-pod
  type: NodePort
  ports:
    - name: http
      protocol: TCP
      port: 11008
      targetPort: 11008
      nodePort: 11008
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: rbac-monitor
spec:
  selector:
    matchLabels:
      app: rbac-pod
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 2
      maxUnavailable: 0
  template:
    metadata:
      labels:
        app: rbac-pod
    spec:
      containers:
        - name: rbac
          image: xxx
          imagePullPolicy: Always
          ports:
            - containerPort: 11008
              name: "http"
          workingDir: /home/rbac
          command: [ "java" ]
          args: [
            "-jar",
            "rbac.jar"
          ]
          readinessProbe:
            httpGet:
              path: /app/status
              port: 11008
            initialDelaySeconds: 20
            timeoutSeconds: 30
            periodSeconds: 30
          livenessProbe:
            httpGet:
              path: /app/status
              port: 11008
            initialDelaySeconds: 15
            timeoutSeconds: 30
            periodSeconds: 30
      nodeSelector:
        monitor: log
      dnsPolicy: ClusterFirst
      imagePullSecrets:
        - name: harbor-pri-sec