---
# Elasticsearch deployment itself
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: elasticsearch-logging
  namespace: kube-system
  labels:
    k8s-app: elasticsearch-logging
    version: v6.3.0
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  serviceName: elasticsearch-logging
  replicas: 1
  selector:
    matchLabels:
      k8s-app: elasticsearch-logging
      version: v6.3.0
  template:
    metadata:
      labels:
        k8s-app: elasticsearch-logging
        version: v6.3.0
        kubernetes.io/cluster-service: "true"
    spec:
      serviceAccountName: elasticsearch-logging
      containers:
        - name: elasticsearch-logging
          image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.3.2
          resources:
            # need more cpu upon initialization, therefore burstable class
            limits:
              cpu: 1000m
            requests:
              cpu: 100m
          ports:
            - containerPort: 9200
              name: db
              protocol: TCP
            - containerPort: 9300
              name: transport
              protocol: TCP
          volumeMounts:
            - name: elasticsearch-logging
              mountPath: /usr/share/elasticsearch/data
          env:
            - name: "NAMESPACE"
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
      volumes:
        - name: elasticsearch-logging
          emptyDir: {}
      # Elasticsearch requires vm.max_map_count to be at least 262144.
      # If your OS already sets up this number to a higher value, feel free
      # to remove this init container.
      initContainers:
        - image: alpine:3.6
          command: ["/sbin/sysctl", "-w", "vm.max_map_count=262144"]
          name: elasticsearch-logging-init
          securityContext:
            privileged: true
