arcadedb-statefulset.yaml

# If you are running this on MacOSX, assure you have k8s desktop version. Run:
#
# > kubectl config use-context docker-for-desktop
#
# Overall Design:
# - a headless service to expose a DNS entry for discovery
# - a service to expose end-points to the outside world
# - the stateful set itself
# - a load-balancer service to balance the requests among the available nodes
#
# Using ArcadeDB with k8s
# - Create cluster    : kubectl apply -f arcadedb-statefulset.yaml
# - List the pods     : kubectl get pods
# - Run console       : kubectl exec -it arcadedb-0 -- bin/console.sh
# - Destroy cluster   : kubectl delete -f arcadedb-replica.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: arcadedb
---
apiVersion: v1
kind: Service
metadata:
  name: arcadedb-http
  labels:
    app: arcadedb
spec:
  clusterIP:
  ports:
    - name: http
      port: 2480
  selector:
    app: arcadedb
  type: LoadBalancer
---
apiVersion: v1
kind: Service
metadata:
  # This is a "headless" service for the arcadedb which exists to allow discovery of the set of
  # member pods (masters). The CNAME of this service points to SRV records - one for each Pod that
  # is Running and Ready). Read more in the Kubernetes docs:
  # https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/
  name: arcadedb
  labels:
    app: arcadedb
spec:
  clusterIP: None
  ports:
    - name: http
      port: 2480
      targetPort: 2480
    - name: rpc
      port: 2424
      targetPort: 2424
  selector:
    app: arcadedb
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: arcadedb
  labels:
    app: arcadedb
spec:
  serviceName: arcadedb
  podManagementPolicy: "OrderedReady"
  replicas: 3
  selector:
    matchLabels:
      app: arcadedb
  template:
    metadata:
      labels:
        app: arcadedb
    spec:
      affinity:
        # Set the anti-affinity selector scope to arcadedb servers.
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 100
              podAffinityTerm:
                labelSelector:
                  matchExpressions:
                    - key: app
                      operator: In
                      values:
                        - arcadedb
                topologyKey: kubernetes.io/hostname
      containers:
        - name: arcadedb
          image: arcadedata/arcadedb:latest
          imagePullPolicy: IfNotPresent
          env:
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
            - name: rootPassword
              valueFrom:
                secretKeyRef:
                  key: rootPassword
                  name: arcadedb-credentials
                  optional: false
          command:
            - "bin/server.sh"
            - "-Darcadedb.dumpConfigAtStartup=true"
            - "-Darcadedb.server.name=${HOSTNAME}"
            - "-Darcadedb.server.rootPassword=${rootPassword}"
            - "-Darcadedb.server.databaseDirectory=/mnt/data0/databases"
            - "-Darcadedb.server.defaultDatabases=Universe[elon:musk]"
            - "-Darcadedb.ha.enabled=true"
            - "-Darcadedb.ha.replicationIncomingHost=0.0.0.0"
            - "-Darcadedb.ha.serverList=arcadedb-0.arcadedb.default.svc.cluster.local:2424"
            - "-Darcadedb.ha.k8s=true"
            - "-Darcadedb.ha.k8sSuffix=.arcadedb.default.svc.cluster.local"
          resources:
            requests:
              memory: "512Mi"
          ports:
            - containerPort: 2480
              name: http
            - containerPort: 2424
              name: rpc
          # These volume mounts are persistent. They are like inline claims,
          # but not exactly because the names need to match exactly one of
          # the stateful pod volumes.
          volumeMounts:
            - name: datadir
              mountPath: /mnt/data0
  updateStrategy:
    type: RollingUpdate
  # These are converted to volume claims by the controller
  # and mounted at the paths mentioned above.
  # do not use these in production until ssd GCEPersistentDisk or other ssd pd
  volumeClaimTemplates:
    - metadata:
        name: datadir
      spec:
        accessModes: ["ReadWriteOnce"]
        resources:
          requests:
            storage: 10Gi