apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: fluentd
  namespace: kube-system
  labels:
    k8s-app: fluentd-logging
    version: v1
spec:
  selector:
    matchLabels:
      k8s-app: fluentd-logging
      version: v1
  template:
    metadata:
      labels:
        k8s-app: fluentd-logging
        version: v1
    spec:
      tolerations:
      - key: node-role.kubernetes.io/master
        effect: NoSchedule
      containers:
      - name: fluentd
        image: fluent/fluentd-kubernetes-daemonset:v1-debian-opensearch
        env:
          - name:  FLUENT_OPENSEARCH_HOST
            value: "opensearch-logging"
          - name:  FLUENT_OPENSEARCH_PORT
            value: "9200"
          - name: FLUENT_OPENSEARCH_SCHEME
            value: "https"
          # Option to configure OpenSearch plugin with self signed certs
          # ================================================================
          - name: FLUENT_OPENSEARCH_SSL_VERIFY
            value: "true"
          # Option to configure OpenSearch plugin with tls
          # ================================================================
          - name: FLUENT_OPENSEARCH_SSL_VERSION
            value: "TLSv1_2"
          # Authentication
          # =====================
          - name: FLUENT_OPENSEARCH_USER
            value: "username"
          - name: FLUENT_OPENSEARCH_PASSWORD
            value: "changeme"
          # Certificate
          # =====================
          - name: FLUENT_OPENSEARCH_CA_PATH
            value: "/path/to/file.ca"
          - name: FLUENT_OPENSEARCH_CLIENT_CERT
            value: "/path/to/file.cert"
          - name: FLUENT_OPENSEARCH_CLIENT_KEY
            value: "/path/to/file.key"
          - name: FLUENT_OPENSEARCH_CLIENT_KEY_PASS
            value: "changeme"
          # Fluentd Parser
          # =====================
          - name: FLUENT_CONTAINER_TAIL_PARSER_TYPE
            value: "cri"
          - name: FLUENT_CONTAINER_TAIL_PARSER_TIME_FORMAT
            value: "%Y-%m-%dT%H:%M:%S.%N%:z"
        resources:
          limits:
            memory: 200Mi
          requests:
            cpu: 100m
            memory: 200Mi
        volumeMounts:
        - name: varlog
          mountPath: /var/log
        # When actual pod logs in /var/lib/docker/containers, the following lines should be used.
        # - name: dockercontainerlogdirectory
        #   mountPath: /var/lib/docker/containers
        #   readOnly: true
        # When actual pod logs in /var/log/pods, the following lines should be used.
        - name: dockercontainerlogdirectory
          mountPath: /var/log/pods
          readOnly: true
      terminationGracePeriodSeconds: 30
      volumes:
      - name: varlog
        hostPath:
          path: /var/log
      # When actual pod logs in /var/lib/docker/containers, the following lines should be used.
      # - name: dockercontainerlogdirectory
      #   hostPath:
      #     path: /var/lib/docker/containers
      # When actual pod logs in /var/log/pods, the following lines should be used.
      - name: dockercontainerlogdirectory
        hostPath:
          path: /var/log/pods
