CrateDB-Kubernetes

This CrateDB/crate/crate.io StatefulSet Deployment for Kubernetes 1.7 will get your CrateDB cluster up and running.

Discovery of nodes is done via DNS. Please be advised to alter the template according to your needs. Copy-pasting will fail since you will likely need to modify the storageClassName of the provisioned volumes and if you opt to deploy into a different namespace other than default. You may also want to create an additional service to expose the web interface.

I created this repo since the official CrateDB Kubernetes template does not work and is still using the deprecated PetSet deployments (as of August 2017).

K8s

apiVersion: v1
kind: Service
metadata:
  name: crate
spec:
  clusterIP: None
  ports:
    - port: 4200
      name: web
    - port: 4300
      name: transport
  selector:
    app: crate
---
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
  name: crate
spec:
  replicas: 3
  podManagementPolicy: Parallel
  updateStrategy:
    type: RollingUpdate
  serviceName: crate
  template:
    metadata:
      name: crate
      labels:
        app: crate
    spec:
      terminationGracePeriodSeconds: 25
      containers:
        - name: crate
          image: crate:2.1.2
          args:
            - -Ccluster.name=crate
            - -Cdiscovery.zen.minimum_master_nodes=3
            - -Cgateway.expected_nodes=3
            - -Cgateway.recover_after_nodes=3
            - -Cnetwork.bind_host=0.0.0.0
            - -Cnetwork.publish_host=_site_
            - -Cdiscovery.type=zen
            - -Cdiscovery.zen.hosts_provider=srv
            - -Cdiscovery.srv.query=_transport._tcp.crate.default.svc.cluster.local
            - -Clicense.enterprise=false
          env:
            - name: CRATE_HEAP_SIZE
              value: 3g
          resources:
            requests:
              memory: 6G
              cpu: 2
            limits:
              memory: 10G
              cpu: 3
          volumeMounts:
            - mountPath: /data
              name: data
          ports:
            - containerPort: 4200
              name: web
            - containerPort: 4300
              name: cluster
      initContainers:
        - name: sysctl
          image: busybox
          imagePullPolicy: IfNotPresent
          command: ["sysctl", "-w", "vm.max_map_count=262144"]
          securityContext:
            privileged: true
  volumeClaimTemplates:
    - metadata:
        name: data
      spec:
        accessModes:
          - ReadWriteOnce
        storageClassName: ssd-normal
        resources:
          requests:
            storage: 8Gi
---