cockroachdb-statefulset.yaml

apiVersion: v1
kind: Service
metadata:
  # This service is meant to be used by clients of the database. It exposes a ClusterIP that will
  # automatically load balance connections to the different database pods.
  name: cockroachdb-public
  labels:
    app: cockroachdb
spec:
  ports:
  # The main port, served by gRPC, serves Postgres-flavor SQL, internode
  # traffic and the cli.
  - port: 26257
    targetPort: 26257
    name: grpc
  # The secondary port serves the UI as well as health and debug endpoints.
  - port: 8080
    targetPort: 8080
    name: http
  selector:
    app: cockroachdb
---
apiVersion: v1
kind: Service
metadata:
  # This service only exists to create DNS entries for each pod in the stateful
  # set such that they can resolve each other's IP addresses. It does not
  # create a load-balanced ClusterIP and should not be used directly by clients
  # in most circumstances.
  name: cockroachdb
  labels:
    app: cockroachdb
  annotations:
    # Use this annotation in addition to the actual publishNotReadyAddresses
    # field below because the annotation will stop being respected soon but the
    # field is broken in some versions of Kubernetes:
    # https://github.com/kubernetes/kubernetes/issues/58662
    # service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
    # Enable automatic monitoring of all instances when Prometheus is running in the cluster.
    prometheus.io/scrape: "true"
    prometheus.io/path: "_status/vars"
    prometheus.io/port: "8080"
spec:
  ports:
  - port: 26257
    targetPort: 26257
    name: grpc
  - port: 8080
    targetPort: 8080
    name: http
  # We want all pods in the StatefulSet to have their addresses published for
  # the sake of the other CockroachDB pods even before they're ready, since they
  # have to be able to talk to each other in order to become ready.
  publishNotReadyAddresses: true
  clusterIP: None
  selector:
    app: cockroachdb
---
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
  name: cockroachdb-budget
  labels:
    app: cockroachdb
spec:
  selector:
    matchLabels:
      app: cockroachdb
  maxUnavailable: 1
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: cockroachdb
spec:
  serviceName: "cockroachdb"
  replicas: 3
  selector:
    matchLabels:
      app: cockroachdb
  template:
    metadata:
      labels:
        app: cockroachdb
    spec:
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
          - weight: 100
            podAffinityTerm:
              labelSelector:
                matchExpressions:
                - key: app
                  operator: In
                  values:
                  - cockroachdb
              topologyKey: kubernetes.io/hostname
      containers:
      - name: cockroachdb
        image: cockroachdb/cockroach:v20.1.1
        imagePullPolicy: IfNotPresent
        # TODO: Change these to appropriate values for the hardware that you're running. You can see
        # the amount of allocatable resources on each of your Kubernetes nodes by running:
        #   kubectl describe nodes
        # resources:
        #   requests:
        #     cpu: "16"
        #     memory: "8Gi"
        #   limits:
            # NOTE: Unless you have enabled the non-default Static CPU Management Policy
            # and are using an integer number of CPUs, we don't recommend setting a CPU limit.
            # See:
            #   https://kubernetes.io/docs/tasks/administer-cluster/cpu-management-policies/#static-policy
            #   https://github.com/kubernetes/kubernetes/issues/51135
            #   cpu: "16"
            #   memory: "8Gi" 
        ports:
        - containerPort: 26257
          name: grpc
        - containerPort: 8080
          name: http
        livenessProbe:
          httpGet:
            path: "/health"
            port: http
          initialDelaySeconds: 30
          periodSeconds: 5
        readinessProbe:
          httpGet:
            path: "/health?ready=1"
            port: http
          initialDelaySeconds: 10
          periodSeconds: 5
          failureThreshold: 2
        volumeMounts:
        - name: datadir
          mountPath: /cockroach/cockroach-data
        env:
        - name: COCKROACH_CHANNEL
          value: kubernetes-insecure
        command:
          - "/bin/bash"
          - "-ecx"
          # The use of qualified `hostname -f` is crucial:
          # Other nodes aren't able to look up the unqualified hostname.
          - "exec /cockroach/cockroach start --logtostderr --insecure --advertise-host $(hostname -f) --http-addr 0.0.0.0 --join cockroachdb-0.cockroachdb,cockroachdb-1.cockroachdb,cockroachdb-2.cockroachdb --cache 25% --max-sql-memory 25%"
      # No pre-stop hook is required, a SIGTERM plus some time is all that's
      # needed for graceful shutdown of a node.
      terminationGracePeriodSeconds: 60
      volumes:
      - name: datadir
        persistentVolumeClaim:
          claimName: datadir
  podManagementPolicy: Parallel
  updateStrategy:
    type: RollingUpdate
  volumeClaimTemplates:
  - metadata:
      name: datadir
    spec:
      accessModes:
        - "ReadWriteOnce"
      resources:
        requests:
          storage: 30Gi