SycllaDB Kubenetes Examples

config_map.yml

apiVersion: v1
kind: ConfigMap
metadata:
  name: scylla
data:
  readiness-probe: |
    #!/usr/bin/env bash

    set -euo pipefail

    if [[ "$(nodetool status | grep "${POD_IP}")" == *"UN"* ]]; then
      exit 0;
    else
      exit 1;
    fi

service.yml

apiVersion: v1
kind: Service
metadata:
  labels:
    app: scylla
  name: scylla
spec:
  clusterIP: None
  ports:
    - port: 9042
  selector:
    app: scylla

stateful_set.yml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: scylla
  labels:
    app: scylla
spec:
  serviceName: scylla
  replicas: 3
  selector:
    matchLabels:
      app: scylla
  template:
    metadata:
      labels:
        app: scylla
    spec:
      containers:
        - name: scylla
          image: scylladb/scylla:2.2.0
          imagePullPolicy: IfNotPresent
          args: ["--seeds", "scylla-0.scylla.default.svc.cluster.local"]
          ports:
            - containerPort: 7000
              name: intra-node
            - containerPort: 7001
              name: tls-intra-node
            - containerPort: 7199
              name: jmx
            - containerPort: 9042
              name: cql
          resources:
            limits:
              cpu: 500m
              memory: 1Gi
            requests:
              cpu: 500m
              memory: 1Gi
          securityContext:
            capabilities:
              add:
                - IPC_LOCK
          lifecycle:
            preStop:
              exec:
                command: ["/bin/sh", "-c", "PID=$(pidof scylla) && kill $PID && while ps -p $PID > /dev/null; do sleep 1; done"]
          env:
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
          readinessProbe:
            exec:
              command:
                - bash
                - /opt/probes/readiness
            initialDelaySeconds: 15
            timeoutSeconds: 5
          volumeMounts:
            - name: scylla-data
              mountPath: /var/lib/scylla
            - name: scylla-probes
              mountPath: /opt/probes
              readOnly: true
      volumes:
        - name: scylla-probes
          configMap:
            name: scylla
            items:
              - key: readiness-probe
                path: readiness

  volumeClaimTemplates:
    - metadata:
        name: scylla-data
        annotations:
          volume.beta.kubernetes.io/storage-class: scylla-ssd
      spec:
        accessModes: ["ReadWriteOnce"]
        resources:
          requests:
            storage: 1Gi

storage_class.yml

kind: StorageClass
apiVersion: storage.k8s.io/v1beta1
metadata:
  name: scylla-ssd
provisioner: kubernetes.io/gce-pd
parameters:
  type: pd-ssd
  zone: asia-southeast1-a