Elasticsearch 4.6 minimal cluster in Kubernetes

elasticsearch.yml

#
# Copyright 2017-2018 The Jaeger Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
# in compliance with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software distributed under the License
# is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
# or implied. See the License for the specific language governing permissions and limitations under
# the License.
#

---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: elasticsearch
  labels:
    app: jaeger
    jaeger-infra: elasticsearch-statefulset
spec:
  serviceName: elasticsearch
  replicas: 3
  selector:
    matchLabels:
      app: jaeger-elasticsearch
      jaeger-infra: elasticsearch-replica
  template:
    metadata:
      labels:
        app: jaeger-elasticsearch
        jaeger-infra: elasticsearch-replica
    spec:
      containers:
        - name: elasticsearch
          image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.4.1
          securityContext:
            runAsUser: 1000
          command:
            - bin/elasticsearch
          args:
            - "-Ediscovery.zen.ping.unicast.hosts=elasticsearch-cluster"
            - "-Ediscovery.zen.minimum_master_nodes=2"
          env:
            - name: ES_JAVA_OPTS
              # in elasticsearch, default min/max heap size is 1g,
              # should be overrided with some appropriate value here
              value: -Xms256m -Xmx256m 
          resources:
            limits:
              cpu: 500m
              memory: 512Mi
            requests:
              cpu: 100m
              memory: 256Mi
          volumeMounts:
            - name: data
              mountPath: /usr/share/elasticsearch/data
          ports:
            - name: elasticsearch
              protocol: TCP
              containerPort: 9200
            - name: transport
              protocol: TCP
              containerPort: 9300
          readinessProbe:
            httpGet:
              path: /
              port: elasticsearch
              httpHeaders:
                - name: Authorization
                  # default user/password, change it if needed
                  value: Basic ZWxhc3RpYzpjaGFuZ2VtZQ==
            initialDelaySeconds: 15
            periodSeconds: 5
            timeoutSeconds: 4
  updateStrategy:
    type: RollingUpdate
  podManagementPolicy: Parallel
  volumeClaimTemplates:
    - metadata:
        name: data
        labels:
          app: jaeger
          jaeger-infra: elasticsearch-service
      spec:
        accessModes:
          - ReadWriteOnce
        resources:
          requests:
            storage: 8Gi
---
apiVersion: v1
kind: Service
metadata:
  name: elasticsearch
  labels:
    app: jaeger
    jaeger-infra: elasticsearch-service
spec:
  clusterIP: None
  selector:
    app: jaeger-elasticsearch
  ports:
  - name: elasticsearch
    port: 9200
    protocol: TCP
    targetPort: 9200
---
apiVersion: v1
kind: Service
metadata:
  annotations:
    service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
  name: elasticsearch-cluster
  labels:
    app: jaeger
    jaeger-infra: elasticsearch-service
spec:
  clusterIP: None
  selector:
    app: jaeger-elasticsearch
  ports:
  - port: 9300
    protocol: TCP
    targetPort: 9300
  publishNotReadyAddresses: true