apiVersion: v1
kind: Namespace
metadata:
  name: elasticsearch
  labels:
    app.kubernetes.io/name: elasticsearch
    app.kubernetes.io/component: logging
    app.kubernetes.io/part-of: telecom-platform
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: elasticsearch-master
  namespace: elasticsearch
  labels:
    app.kubernetes.io/name: elasticsearch
    app.kubernetes.io/component: master
    app.kubernetes.io/part-of: telecom-platform
spec:
  serviceName: elasticsearch-master
  replicas: 3
  selector:
    matchLabels:
      app.kubernetes.io/name: elasticsearch
      app.kubernetes.io/component: master
  template:
    metadata:
      labels:
        app.kubernetes.io/name: elasticsearch
        app.kubernetes.io/component: master
        app.kubernetes.io/part-of: telecom-platform
    spec:
      securityContext:
        fsGroup: 1000
        runAsUser: 1000
      initContainers:
      - name: increase-vm-max-map
        image: busybox:1.35.0
        command: ["sysctl", "-w", "vm.max_map_count=262144"]
        securityContext:
          privileged: true
      - name: increase-fd-limit
        image: busybox:1.35.0
        command: ["sh", "-c", "ulimit -n 65536"]
        securityContext:
          privileged: true
      containers:
      - name: elasticsearch
        image: docker.elastic.co/elasticsearch/elasticsearch:8.10.0
        ports:
        - containerPort: 9200
          name: rest
        - containerPort: 9300
          name: inter-node
        env:
        - name: cluster.name
          value: telecom-platform-logs
        - name: node.name
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: discovery.seed_hosts
          value: "elasticsearch-master"
        - name: cluster.initial_master_nodes
          value: "elasticsearch-master-0,elasticsearch-master-1,elasticsearch-master-2"
        - name: ES_JAVA_OPTS
          value: "-Xms1g -Xmx1g"
        - name: xpack.security.enabled
          value: "false"
        - name: xpack.monitoring.collection.enabled
          value: "true"
        resources:
          requests:
            cpu: 500m
            memory: 1Gi
          limits:
            cpu: 1000m
            memory: 2Gi
        volumeMounts:
        - name: data
          mountPath: /usr/share/elasticsearch/data
        - name: config
          mountPath: /usr/share/elasticsearch/config
      volumes:
      - name: config
        configMap:
          name: elasticsearch-config
  volumeClaimTemplates:
  - metadata:
      name: data
      labels:
        app.kubernetes.io/name: elasticsearch
        app.kubernetes.io/component: master
        app.kubernetes.io/part-of: telecom-platform
    spec:
      accessModes: ["ReadWriteOnce"]
      storageClassName: "standard"
      resources:
        requests:
          storage: 20Gi
---
apiVersion: v1
kind: Service
metadata:
  name: elasticsearch-master
  namespace: elasticsearch
  labels:
    app.kubernetes.io/name: elasticsearch
    app.kubernetes.io/component: master
    app.kubernetes.io/part-of: telecom-platform
spec:
  ports:
  - port: 9200
    name: rest
  - port: 9300
    name: inter-node
  selector:
    app.kubernetes.io/name: elasticsearch
    app.kubernetes.io/component: master
  clusterIP: None
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: elasticsearch-config
  namespace: elasticsearch
  labels:
    app.kubernetes.io/name: elasticsearch
    app.kubernetes.io/component: master
    app.kubernetes.io/part-of: telecom-platform
data:
  elasticsearch.yml: |
    cluster.name: telecom-platform-logs
    node.name: ${HOSTNAME}
    network.host: 0.0.0.0
    discovery.seed_hosts: ["elasticsearch-master"]
    cluster.initial_master_nodes: ["elasticsearch-master-0", "elasticsearch-master-1", "elasticsearch-master-2"]
    xpack.security.enabled: false
    xpack.monitoring.collection.enabled: true
    xpack.monitoring.elasticsearch.collection.enabled: true
    indices.lifecycle.poll_interval: 1m