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Filebeat收集容器日志，其中NODE_NAME配置，是将node信息添加到日志中，所以需要serviceAccount权限，如果不需要配置NODE信息，可以不创建serviceAccount，其他内容可根据实际情况修改

apiVersion: v1
kind: ServiceAccount
metadata:
  name: filebeat
  namespace: elk
  labels:
    app: filebeat
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: filebeat-clusterrole
  labels:
    app: filebeat
rules:
- apiGroups: [""]
  resources:
  - nodes
  - namespaces
  - pods
  verbs:
  - watch
  - get
  - list
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: filebaet-clusterrolebinding
  labels:
    app: filebeat
subjects:
- kind: ServiceAccount
  name: filebeat
  namespace: elk
roleRef:
  kind: ClusterRole
  name: filebeat-clusterrole
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: filebeat
  namespace: elk 
data:
  filebeat.yml: |-
    filebeat.inputs:
    - type: container 
      paths:
      - /var/log/containers/*.log
      processors:
        - add_kubernetes_metadata:
            in_cluster: true
            host: ${NODE_NAME}
        - add_fields:
            fields:
              node_name: ${NODE_NAME}

    output.elasticsearch:
      hosts: ["http://elasticsearch:9200"]
      indices:
        - index: "containers_log"
    setup.template.name: "containers"
    setup.template.pattern: "containers-*"
    setup.ilm.enabled: false
---
apiVersion: apps/v1
kind: DaemonSet 
metadata:
  name: filebeat 
  namespace: elk 
spec:
  selector:
    matchLabels:
      app: filebeat-log
  template:
    metadata:
      labels:
        app: filebeat-log
    spec:
      serviceAccount: filebeat
      containers:
        - args:
            - -c
            - /config/filebeat.yml 
          env:
            - name: NODE_NAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
          image: docker.elastic.co/beats/filebeat:8.5.0
          imagePullPolicy: Always
          name: container-log
          volumeMounts:
          - mountPath: /config/filebeat.yml
            name: filebeat-conf
            subPath: filebeat.yml
          - mountPath: /var/log/containers
            name: containerslog
          - mountPath: /var/log/pods 
            name: pods
      volumes:
        - name: filebeat-conf
          configMap:
            name: filebeat
        - name: containerslog
          hostPath: 
            path: /var/log/containers
        - name: pods
          hostPath:
            path: /var/log/pods