Kubernetes-DaemonSet

DaemonSet

DaemonSet：守护进程集，缩写为ds，在所有节点或者是匹配的节点上都部署一个Pod

# DaemonSet.yaml
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: ds-test
  labels:
    app: filebeat
spec:
  selector:
    matchLabels:
      app: filebeat
  template:
    metadata:
      labels:
        app: filebeat
    spec:
      containers:
      - name: logs
        image: nginx
        ports:
        - containerPort: 80
        volumeMounts:
        - name: varlog
          mountPath: /tmp/log
      volumes:
      - name: varlog
        hostPath:
          path: /var/log

$ kubectl get pods -o wide
NAME            READY   STATUS    RESTARTS   AGE   IP               NODE         NOMINATED NODE   READINESS GATES
ds-test-59xv7   1/1     Running   0          85s   172.16.169.138   k8s-node2    <none>           <none>
ds-test-6d6jz   1/1     Running   0          85s   172.16.235.195   k8s-master   <none>           <none>
ds-test-g9667   1/1     Running   0          85s   172.16.107.203   k8s-node3    <none>           <none>
ds-test-rpjcq   1/1     Running   0          85s   172.16.36.73     k8s-node1    <none>           <none>