apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: fluentd-gcp-v3.0.0
  namespace: kube-system
  labels:
    k8s-app: fluentd-gcp
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
    version: v3.0.0
spec:
  updateStrategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        k8s-app: fluentd-gcp
        kubernetes.io/cluster-service: "true"
        version: v3.0.0
      # This annotation ensures that fluentd does not get evicted if the node
      # supports critical pod annotation based priority scheme.
      # Note that this does not guarantee admission on the nodes (#40573).
      annotations:
        scheduler.alpha.kubernetes.io/critical-pod: ''
    spec:
      priorityClassName: system-node-critical
      serviceAccountName: fluentd-gcp
      dnsPolicy: Default
      containers:
      - name: fluentd-gcp
        image: gcr.io/stackdriver-agents/stackdriver-logging-agent:{{ fluentd_gcp_version }}
        volumeMounts:
        - name: varlog
          mountPath: /var/log
        - name: varlibdockercontainers
          mountPath: /var/lib/docker/containers
          readOnly: true
        - name: config-volume
          mountPath: /etc/google-fluentd/config.d
        env:
        - name: NODE_NAME
          valueFrom:
            fieldRef:
              apiVersion: v1
              fieldPath: spec.nodeName
        - name: STACKDRIVER_METADATA_AGENT_URL
          value: http://$(NODE_NAME):8799
        # Liveness probe is aimed to help in situarions where fluentd
        # silently hangs for no apparent reasons until manual restart.
        # The idea of this probe is that if fluentd is not queueing or
        # flushing chunks for 5 minutes, something is not right. If
        # you want to change the fluentd configuration, reducing amount of
        # logs fluentd collects, consider changing the threshold or turning
        # liveness probe off completely.
        livenessProbe:
          initialDelaySeconds: 600
          periodSeconds: 60
          exec:
            command:
            - '/bin/sh'
            - '-c'
            - >
              LIVENESS_THRESHOLD_SECONDS=${LIVENESS_THRESHOLD_SECONDS:-300};
              STUCK_THRESHOLD_SECONDS=${LIVENESS_THRESHOLD_SECONDS:-900};
              if [ ! -e /var/log/fluentd-buffers ];
              then
                exit 1;
              fi;
              touch -d "${STUCK_THRESHOLD_SECONDS} seconds ago" /tmp/marker-stuck;
              if [[ -z "$(find /var/log/fluentd-buffers -type f -newer /tmp/marker-stuck -print -quit)" ]];
              then
                rm -rf /var/log/fluentd-buffers;
                exit 1;
              fi;
              touch -d "${LIVENESS_THRESHOLD_SECONDS} seconds ago" /tmp/marker-liveness;
              if [[ -z "$(find /var/log/fluentd-buffers -type f -newer /tmp/marker-liveness -print -quit)" ]];
              then
                exit 1;
              fi;
      # BEGIN_PROMETHEUS_TO_SD
      - name: prometheus-to-sd-exporter
        image: k8s.gcr.io/prometheus-to-sd:v0.2.4
        command:
          - /monitor
          - --stackdriver-prefix={{ prometheus_to_sd_prefix }}/addons
          - --api-override={{ prometheus_to_sd_endpoint }}
          - --source=fluentd:http://localhost:24231?whitelisted=stackdriver_successful_requests_count,stackdriver_failed_requests_count,stackdriver_ingested_entries_count,stackdriver_dropped_entries_count
          - --pod-id=$(POD_NAME)
          - --namespace-id=$(POD_NAMESPACE)
        env:
          - name: POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
          - name: POD_NAMESPACE
            valueFrom:
              fieldRef:
                fieldPath: metadata.namespace
      # END_PROMETHEUS_TO_SD
      nodeSelector:
        beta.kubernetes.io/fluentd-ds-ready: "true"
      tolerations:
      - key: "node.alpha.kubernetes.io/ismaster"
        effect: "NoSchedule"
      - operator: "Exists"
        effect: "NoExecute"
      - operator: "Exists"
        effect: "NoSchedule"
      terminationGracePeriodSeconds: 30
      volumes:
      - name: varlog
        hostPath:
          path: /var/log
      - name: varlibdockercontainers
        hostPath:
          path: /var/lib/docker/containers
      - name: config-volume
        configMap:
          name: {{ fluentd_gcp_configmap_name }}-v1.2.5