elasticsearch.yaml

---
apiVersion: v1
kind: Service
metadata:
  name: elasticsearch
  namespace: elklogging
spec:
  clusterIP: None
  ports:
  - port: 9200
    protocol: TCP
    targetPort: db
  selector:
    k8s-app: elasticsearch
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: elasticsearch
  namespace: elklogging
  labels:
    k8s-app: elasticsearch
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: elasticsearch
  labels:
    k8s-app: elasticsearch
rules:
- apiGroups:
  - ""
  resources:
  - "services"
  - "namespaces"
  - "endpoints"
  verbs:
  - "get"
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  namespace: elklogging
  name: elasticsearch
  labels:
    k8s-app: elasticsearch
subjects:
- kind: ServiceAccount
  name: elasticsearch
  namespace: kube-system
  apiGroup: ""
roleRef:
  kind: ClusterRole
  name: elasticsearch
  apiGroup: ""
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: elasticsearch
  namespace: elklogging
  labels:
    k8s-app: elasticsearch
spec:
  serviceName: elasticsearch
  selector:
    matchLabels:
      k8s-app: elasticsearch
  template:
    metadata:
      labels:
        k8s-app: elasticsearch
    spec:
      serviceAccountName: elasticsearch
      containers:
      - image: elasticsearch:7.3.1
        name: elasticsearch
        resources:
          limits:
            cpu: 1
            memory: 2Gi
          requests:
            cpu: 0.5 
            memory: 500Mi
        env:
          - name: "discovery.type"
            value: "single-node"
          - name: ES_JAVA_OPTS
            value: "-Xms512m -Xmx2g" 
        ports:
        - containerPort: 9200
          name: db
          protocol: TCP
        volumeMounts:
        - name: elasticsearch
          mountPath: /usr/share/elasticsearch/data
  volumeClaimTemplates:
  - metadata:
      name: elasticsearch
    spec:
      storageClassName: "nfs-elk-class"
      accessModes: [ "ReadWriteOnce" ]
      resources:
        requests:
          storage: 2Gi