ELK in Kubernetes

elasticsearch.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: elasticsearch-logging
  namespace: kube-system
  labels:
    k8s-app: elasticsearch-logging
spec:
  replicas: 1
  template:
    metadata:
      labels:
        k8s-app: elasticsearch-logging
    spec:
      containers:
      - image: docker.elastic.co/elasticsearch/elasticsearch:5.3.0
        name: elasticsearch
        resources:
          # need more cpu upon initialization, therefore burstable class
          limits:
            cpu: 1000m
            memory: 900Mi
          requests:
            cpu: 500m
            memory: 300Mi
        ports:
        - containerPort: 9200
          name: db
          protocol: TCP
        - containerPort: 9300
          name: transport
          protocol: TCP
        volumeMounts:
        - name: es-persistent-storage
          mountPath: /data
        env:
        - name: "NAMESPACE"
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        - name: "ES_JAVA_OPTS"
          value: "-Xms512m -Xmx512m"
      volumes:
      - name: es-persistent-storage
        emptyDir: {}    
---
apiVersion: v1
kind: Service
metadata:
  name: elasticsearch-logging
  namespace: kube-system
  labels:
    k8s-app: elasticsearch-logging
    kubernetes.io/name: "Elasticsearch"
spec:
  ports:
  - port: 9200
    protocol: TCP
    targetPort: db
  selector:
    k8s-app: elasticsearch-logging

kibana.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: kibana-logging
  namespace: kube-system
  labels:
    k8s-app: kibana-logging
spec:
  replicas: 1
  selector:
    matchLabels:
      k8s-app: kibana-logging
  template:
    metadata:
      labels:
        k8s-app: kibana-logging
    spec:
      containers:
      - name: kibana-logging
        image: docker.elastic.co/kibana/kibana:5.3.0
        resources:       
          requests:
            memory: 300Mi
        env:
          - name: "ELASTICSEARCH_URL"
            value: "http://elasticsearch-logging:9200"
          - name: "SERVER_BASEPATH"
            value: "/kibana"
        ports:
        - containerPort: 5601
          name: ui
          protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
  name: kibana-logging
  namespace: kube-system
  labels:
    k8s-app: kibana-logging
    kubernetes.io/name: "Kibana"
spec:
  selector:
    k8s-app: kibana-logging
  ports:
  - name: http
    port: 80
    targetPort: 5601
    protocol: TCP