控制器DaemonSet

==

root@ubuntu-200470-1:~/daemonset# cat daemon.yaml 
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluentd
  namespace: logging
  labels:
    app: fluentd-logging
spec:
  selector:
    matchLabels:
      name: fluentd
  template:
    metadata:
      labels:
        name: fluentd
    spec:
      containers:
      - name: fluentd-elasticsearch
        image: quay.io/fluentd_elasticsearch/fluentd:v4.5.2
        resources:
          limits:
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 200Mi
        volumeMounts:
        - name: varlog
          mountPath: /var/log
      terminationGracePeriodSeconds: 30
      volumes:
      - name: varlog
        hostPath:
          path: /var/log

kubectl create ns logging

kubectl apply -f daemon.yam

 kubectl get daemonset -n logging
NAME      DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR   AGE
fluentd   2         2         2       2            2           <none>          9m3s

references

https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/

Kubernetes Daemonset: A Comprehensive Guide