Daemonset 控制器

DaemonSet 控制器：概念、原理解读

DaemonSet 控制器能够确保 k8s 集群所有的节点都运行一个相同的 pod 副本，当向k8s 集群中增加 node 节点时，这个 node 节点也会自动创建一个 pod 副本，当 node 节点从集群移除，这些 pod 也会自动删除；删除 Daemonset 也会删除它们创建的 pod

编写DaemonSet 控制器清单文件

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apiVersion: apps/v1 kind: DaemonSet metadata:   name: fluentd-elasticsearch   labels:     k8s-app: fluentd-logging spec:   selector:     matchLabels:       name: fluentd-elasticsearch   template:     metadata:       labels:         name: fluentd-elasticsearch     spec:       tolerations:       - key: node-role.kubernetes.io/master         effect: NoSchedule       containers:       - name: fluentd-elasticsearch         image: lixiaofan0122/fluentd:v2.5.1         resources:           limits:             memory: 200Mi           requests:             cpu: 100m             memory: 200Mi         volumeMounts:         - name: varlog           mountPath: /var/log         - name: varlibdockercontainers           mountPath: /var/lib/docker/containers           readOnly: true         volumes:       - name: varlog         hostPath:           path: /var/log       - name: varlibdockercontainers         hostPath:           path: /var/lib/docker/containers [root@master-1 pods]# kubectl apply -f daemonset-1.yaml daemonset.apps/fluentd-elasticsearch created