(可选)为大型集群启用 Use_Kubelet 功能 - Amazon CloudWatch
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(可选)为大型集群启用 Use_Kubelet 功能

默认情况下,在 FluentBit Kubernetes 插件中禁用 Use_Kubelet 功能。启用此功能可以减少 API 服务器的流量,并缓解 API 服务器成为瓶颈的问题。我们建议您为大型集群启用此功能。

要启用 Use_Kubelet,请先将节点和节点/代理权限添加到 clusterRole config 中。

apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: name: fluent-bit-role rules: - nonResourceURLs: - /metrics verbs: - get - apiGroups: [""] resources: - namespaces - pods - pods/logs - nodes - nodes/proxy verbs: ["get", "list", "watch"]

在 DaemonSet 配置中,此功能需要主机网络访问权限。适用于 amazon/aws-for-fluent-bit 的镜像版本应为 2.12.0 或更高版本,或者 fluent bit 镜像版本应为 1.7.2 或更高版本。

apiVersion: apps/v1 kind: DaemonSet metadata: name: fluent-bit namespace: amazon-cloudwatch labels: k8s-app: fluent-bit version: v1 kubernetes.io/cluster-service: "true" spec: selector: matchLabels: k8s-app: fluent-bit template: metadata: labels: k8s-app: fluent-bit version: v1 kubernetes.io/cluster-service: "true" spec: containers: - name: fluent-bit image: amazon/aws-for-fluent-bit:2.19.0 imagePullPolicy: Always env: - name: AWS_REGION valueFrom: configMapKeyRef: name: fluent-bit-cluster-info key: logs.region - name: CLUSTER_NAME valueFrom: configMapKeyRef: name: fluent-bit-cluster-info key: cluster.name - name: HTTP_SERVER valueFrom: configMapKeyRef: name: fluent-bit-cluster-info key: http.server - name: HTTP_PORT valueFrom: configMapKeyRef: name: fluent-bit-cluster-info key: http.port - name: READ_FROM_HEAD valueFrom: configMapKeyRef: name: fluent-bit-cluster-info key: read.head - name: READ_FROM_TAIL valueFrom: configMapKeyRef: name: fluent-bit-cluster-info key: read.tail - name: HOST_NAME valueFrom: fieldRef: fieldPath: spec.nodeName - name: HOSTNAME valueFrom: fieldRef: apiVersion: v1 fieldPath: metadata.name - name: CI_VERSION value: "k8s/1.3.8" resources: limits: memory: 200Mi requests: cpu: 500m memory: 100Mi volumeMounts: # Please don't change below read-only permissions - name: fluentbitstate mountPath: /var/fluent-bit/state - name: varlog mountPath: /var/log readOnly: true - name: varlibdockercontainers mountPath: /var/lib/docker/containers readOnly: true - name: fluent-bit-config mountPath: /fluent-bit/etc/ - name: runlogjournal mountPath: /run/log/journal readOnly: true - name: dmesg mountPath: /var/log/dmesg readOnly: true terminationGracePeriodSeconds: 10 hostNetwork: true dnsPolicy: ClusterFirstWithHostNet volumes: - name: fluentbitstate hostPath: path: /var/fluent-bit/state - name: varlog hostPath: path: /var/log - name: varlibdockercontainers hostPath: path: /var/lib/docker/containers - name: fluent-bit-config configMap: name: fluent-bit-config - name: runlogjournal hostPath: path: /run/log/journal - name: dmesg hostPath: path: /var/log/dmesg serviceAccountName: fluent-bit tolerations: - key: node-role.kubernetes.io/master operator: Exists effect: NoSchedule - operator: "Exists" effect: "NoExecute" - operator: "Exists" effect: "NoSchedule"

Kubernetes 插件配置应该类似于以下内容:

[FILTER] Name kubernetes Match application.* Kube_URL https://kubernetes.default.svc:443 Kube_Tag_Prefix application.var.log.containers. Merge_Log On Merge_Log_Key log_processed K8S-Logging.Parser On K8S-Logging.Exclude Off Labels Off Annotations Off Use_Kubelet On Kubelet_Port 10250 Buffer_Size 0