# Copyright 2017 The Kubernetes Authors All rights reserved.
#
# 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: v1
kind: ReplicationController
metadata:
  name: elasticsearch-logging
  namespace: kube-system
  labels:
    k8s-app: elasticsearch-logging
    # kubernetes.io/minikube-addons: efk
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
spec:
  # serviceName: elasticsearch-logging
  replicas: 1
  selector:
    k8s-app: elasticsearch-logging
    addonmanager.kubernetes.io/mode: Reconcile
  template:
    metadata:
      labels:
        k8s-app: elasticsearch-logging
        addonmanager.kubernetes.io/mode: Reconcile
    spec:
      # SOURCE: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/
      nodeSelector:
        kubernetes.io/hostname: "k8s-node-2"
      containers:
      - name: elasticsearch-logging
        image: k8s.gcr.io/elasticsearch:v5.6.2
        resources:
          limits:
            cpu: 500m
            memory: 2400Mi
          requests:
            cpu: 100m
            memory: 2350Mi
        ports:
        - containerPort: 9200
          name: db
          protocol: TCP
        - containerPort: 9300
          name: transport
          protocol: TCP
        # livenessProbe:
        #   tcpSocket:
        #     port: transport
        #   initialDelaySeconds: 20
        #   periodSeconds: 10
        volumeMounts:
        - name: elasticsearch-logging
          mountPath: /data
        env:
        - name: "NAMESPACE"
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: MINIMUM_MASTER_NODES
          value: "1"

        # - name: NODE_NAME
        #   valueFrom:
        #     fieldRef:
        #       fieldPath: metadata.name
        # - name: CLUSTER_NAME
        #   value: myesdb
        # - name: NUMBER_OF_MASTERS
        #   value: "2"
        # - name: NODE_MASTER
        #   value: "true"
        # - name: NODE_INGEST
        #   value: "false"
        # - name: NODE_DATA
        #   value: "false"
        # - name: HTTP_ENABLE
        #   value: "false"
        # - name: PROCESSORS
        #   valueFrom:
        #     resourceFieldRef:
        #       resource: limits.cpu

        - name: ES_JAVA_OPTS
          # value: "-Xms1024m -Xmx1024m"
          value: "-Xms256m -Xmx256m"
      initContainers:
      - image: registry.hub.docker.com/library/alpine:3.6
        command: ["/sbin/sysctl", "-w", "vm.max_map_count=262144"]
        name: elasticsearch-logging-init
        securityContext:
          privileged: true
      # volumes:
      # - name: elasticsearch-logging
      #   emptyDir: {}
      volumes:
      - name: elasticsearch-logging
        persistentVolumeClaim:
          claimName: elasticsearch-pvc

      # SOURCE: https://github.com/pires/kubernetes-elasticsearch-cluster/blob/master/es-master.yaml
      # volumes:
      #   - emptyDir:
      #       medium: ""
      #     name: "storage"
