apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluent-bit
  namespace: logging
  labels:
    k8s-app: fluent-bit-logging
    version: v1
    kubernetes.io/cluster-service: "true"
spec:
  selector:
    matchLabels:
      k8s-app: fluent-bit-logging
      version: v1
      kubernetes.io/cluster-service: "true"
  template:
    metadata:
      labels:
        k8s-app: fluent-bit-logging
        version: v1
        kubernetes.io/cluster-service: "true"
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "2020"
        prometheus.io/path: /api/v1/metrics/prometheus
    spec:
      containers:
        - name: fluent-bit
          image: fluent/fluent-bit:1.2.1
          ports:
            - containerPort: 2020
          env:
            - name: FLUENT_ELASTICSEARCH_HOST
              value: "elasticsearch"
            - name: FLUENT_ELASTICSEARCH_PORT
              value: "9200"
          volumeMounts:
            - name: varlog
              mountPath: /var/log
            - name: varlibdockercontainers
              mountPath: /var/lib/docker/containers
              readOnly: true
            - name: etcmachineid
              mountPath: /etc/machine-id
              readOnly: true
            - name: fluent-bit-config
              mountPath: /fluent-bit/etc/
          resources:
            requests:
              cpu: 50m
              memory: 50Mi
            limits:
              cpu: 500m
              memory: 500Mi
          livenessProbe:
            httpGet:
              path: /
              port: 2020
          readinessProbe:
            httpGet:
              path: /api/v1/metrics/prometheus
              port: 2020
      terminationGracePeriodSeconds: 10
      volumes:
        - name: varlog
          hostPath:
            path: /var/log
        - name: varlibdockercontainers
          hostPath:
            path: /var/lib/docker/containers
        - name: etcmachineid
          hostPath:
            path: /etc/machine-id
            type: File
        - name: fluent-bit-config
          configMap:
            name: fluent-bit-config
      serviceAccountName: fluent-bit
      tolerations:
        - key: node-role.kubernetes.io/master
          operator: Exists
          effect: NoSchedule
        - operator: "Exists"
          effect: "NoExecute"
        - operator: "Exists"
          effect: "NoSchedule"
