deploy/kubernetes/helm/templates/bookkeeper.yaml

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## A reference of https://github.com/apache/incubator-pulsar/blob/master/kubernetes/google-container-engine/bookie.yaml

{{- $platform := .Values.platform }}
{{- $bookkeeperReplicas := index (index .Values $platform) "bookkeeperReplicas" }}
{{- $cpuMin := index (index .Values $platform) "cpuMin" }}
{{- $cpuMax := index (index .Values $platform) "cpuMax" }}
{{- $memoryMin := index (index .Values $platform) "memoryMin" }}
{{- $memoryMax := index (index .Values $platform) "memoryMax" }}

apiVersion: v1
kind: ConfigMap
metadata:
  name: {{ template "heron.fullname" . }}-bookie-config
data:
  BK_BOOKIE_EXTRA_OPTS: "\"-Xms1g -Xmx1g -XX:MaxDirectMemorySize=1g -XX:+UseG1GC  -XX:MaxGCPauseMillis=10 -XX:+ParallelRefProcEnabled -XX:+UnlockExperimentalVMOptions -XX:+AggressiveOpts -XX:+DoEscapeAnalysis -XX:ParallelGCThreads=32 -XX:ConcGCThreads=32 -XX:G1NewSizePercent=50 -XX:+DisableExplicitGC -XX:-ResizePLAB\""
  BK_bookiePort: "3181"
  BK_journalDirectory: "/bookkeeper/data/journal"
  BK_ledgerDirectories: "/bookkeeper/data/ledgers"
  BK_indexDirectories: "/bookkeeper/data/ledgers" 
  BK_zkServers: {{ .Release.Name }}-zookeeper:{{ .Values.zookeeper.clientPort }}
  # the default manager is flat, which is not good for supporting large number of ledgers
  BK_ledgerManagerType: "hierarchical"
  BK_autoRecoveryDaemonEnabled: "true"
  # TODO: Issue 458: https://github.com/apache/bookkeeper/issues/458
  #BK_statsProviderClass: org.apache.bookkeeper.stats.PrometheusMetricsProvider
---

## BookKeeper servers need to access the local disks and the pods
## cannot be moved across different nodes.
## For this reason, we run BK as a daemon set, one for each node in the
## cluster, unless restricted by label selectors
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: {{ template "heron.fullname" . }}-bookie
  labels:
    app: {{ template "heron.fullname" . }}-bookkeeper
    component: {{ template "heron.fullname" . }}-bookie
spec:
  serviceName: {{ template "heron.fullname" . }}-bookkeeper
  replicas: {{ $bookkeeperReplicas }}
  template:
    metadata:
      labels:
        app: {{ template "heron.fullname" . }}-bookkeeper
        component: {{ template "heron.fullname" . }}-bookie
        # Specify cluster to allow aggregation by cluster in
        # the metrics
        cluster: {{ template "heron.fullname" . }}-bookkeeper
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "8000"

    spec:
      # Make sure multiple pods of bookkeeper don't get scheduled on the
      # same node, unless there are no other available nodes
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 1
              podAffinityTerm:
                labelSelector:
                  matchExpressions:
                    - key: "app"
                      operator: In
                      values:
                        - {{ template "heron.fullname" . }}-bookkeeper
                topologyKey: "kubernetes.io/hostname"
      terminationGracePeriodSeconds: 0
      initContainers:
        # Wait until the zookeeper pods are up and running
        - name: {{ template "heron.fullname" . }}-bookie-init-container
          image: {{ .Values.bookkeeper.image }}
          command: 
            - sh
            - -c
            - >-
              while true; do
                status=$(echo ruok | nc {{ .Release.Name }}-zookeeper {{ .Values.zookeeper.clientPort }});
                if [ "$status" = "imok" ]; then
                  break;
                fi;
                echo 'Zookeeper {{ .Release.Name }}-zookeeper:{{ .Values.zookeeper.clientPort }} not ready';
                sleep 4;
              done
      containers:
        - name: {{ template "heron.fullname" . }}-bookie
          image: {{ .Values.bookkeeper.image }}
          resources:
            requests:
              memory: {{ $memoryMin | quote }}
              cpu: {{ $cpuMin | quote }}
            limits:
              memory: {{ $memoryMax | quote }}
              cpu: {{ $cpuMax | quote }}
          # use the patched entrypoint.sh - it will automatically created the desired distributedlog namespace
          command: [ "/bin/bash", "/opt/distributedlog/bin/entrypoint.sh" ]
          args: ["/opt/bookkeeper/bin/bookkeeper", "bookie"]
          ports:
            - name: client
              containerPort: 3181
              # we are using `status.hostIP` for the bookie's advertised address. export 3181 as the hostPort,
              # so that the containers are able to access the host port
              hostPort: 3181
          envFrom:
            - configMapRef:
                name: {{ template "heron.fullname" . }}-bookie-config
          volumeMounts:
            - name: journal-disk
              mountPath: /bookkeeper/data/journal
            - name: data-disk
              mountPath: /bookkeeper/data/ledgers

  volumeClaimTemplates:
    - metadata:
        name: journal-disk
        annotations:
          volume.alpha.kubernetes.io/storage-class: default
        labels:
          component: {{ template "heron.fullname" . }}-bookkeeper
      spec:
        accessModes: [ "ReadWriteOnce" ]
        resources:
          requests:
            storage: 5Gi
    - metadata:
        name: data-disk
        annotations:
          volume.alpha.kubernetes.io/storage-class: default
        labels:
          component: {{ template "heron.fullname" . }}-bookkeeper
      spec:
        accessModes: [ "ReadWriteOnce" ]
        resources:
          requests:
            storage: 10Gi

---

##
## Define the Bookie headless service
## In practice, in this case, it is only useful to have a view of
## all the bookie pods that are present
##
apiVersion: v1
kind: Service
metadata:
  name: {{ template "heron.fullname" . }}-bookie
  labels:
    app: {{ template "heron.fullname" . }}-bookkeeper
    component: {{ template "heron.fullname" . }}-bookie
spec:
  ports:
  - port: 3181
    name: server
  clusterIP: None
  selector:
    app: {{ template "heron.fullname" . }}-bookkeeper
    component: {{ template "heron.fullname" . }}-bookie