在kubernetes k8s上部署elasticsearch es单节点或集群

这里用nfs作为存储：

https://www.scriptjc.com/article/1147

官方文档：单节点或集群配置文档如下。

https://www.elastic.co/guide/en/elasticsearch/reference/6.8/docker.html
https://www.elastic.co/guide/en/elasticsearch/reference/7.1/docker.html
https://www.elastic.co/guide/en/elasticsearch/reference/8.1/docker.html

官方镜像：

https://hub.docker.com/_/elasticsearch 
https://hub.docker.com/_/kibana

单节点：注意目录权限。

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: es
  namespace: logging
spec:
  serviceName: elasticsearch
  replicas: 1
  selector:
    matchLabels:
      app: elasticsearch
  template:
    metadata:
      labels: 
        app: elasticsearch
    spec:
      nodeSelector:
        eks.amazonaws.com/nodegroup: node-8c-32G
      initContainers:
      - name: increase-vm-max-map
        image: busybox
        command: ["sysctl", "-w", "vm.max_map_count=262144"]
        securityContext:
          privileged: true
      - name: increase-fd-ulimit
        image: busybox
        command: ["sh", "-c", "ulimit -n 65536"]
        securityContext:
          privileged: true
      containers:
      - name: elasticsearch
        image: docker.elastic.co/elasticsearch/elasticsearch:6.8.23
        ports:
        - name: rest
          containerPort: 9200
        resources:
          limits:
            cpu: 1000m
            memory: 2G
          requests:
            cpu: 1000m
            memory: 1G
        volumeMounts:
        - name: data
          mountPath: /usr/share/elasticsearch/data
        env:
        - name: node.name
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: discovery.type
          value: single-node
        - name: ES_JAVA_OPTS
          value: "-Xms1024m -Xmx1024m"
        - name: network.host
          value: "0.0.0.0"
  volumeClaimTemplates:
  - metadata:
      name: data
      labels:
        app: elasticsearch
    spec:
      accessModes:
      - "ReadWriteOnce"
      storageClassName: managed-nfs-storage
      resources:
        requests:
          storage: 30Gi
---
kind: Service
apiVersion: v1
metadata:
  name: elasticsearch
  namespace: logging
  labels:
    app: elasticsearch
spec:
  selector:
    app: elasticsearch
  clusterIP: None
  ports:
    - port: 9200
      name: http-rest

集群：

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: es
  namespace: logging
spec:
  serviceName: elasticsearch
  replicas: 3
  selector:
    matchLabels:
      app: elasticsearch
  template:
    metadata:
      labels: 
        app: elasticsearch
    spec:
      initContainers:
      - name: increase-vm-max-map
        image: busybox
        command: ["sysctl", "-w", "vm.max_map_count=262144"]
        securityContext:
          privileged: true
      - name: increase-fd-ulimit
        image: busybox
        command: ["sh", "-c", "ulimit -n 65536"]
        securityContext:
          privileged: true
      containers:
      - name: elasticsearch
        image: docker.elastic.co/elasticsearch/elasticsearch:6.8.23
        ports:
        - name: rest
          containerPort: 9200
        - name: inter
          containerPort: 9300
        resources:
          limits:
            cpu: 1000m
          requests:
            cpu: 1000m
        volumeMounts:
        - name: data
          mountPath: /usr/share/elasticsearch/data
        env:
        - name: cluster.name
          value: k8s-logs
        - name: node.name
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: cluster.initial_master_nodes
          value: "es-0,es-1,es-2"
        - name: discovery.zen.minimum_master_nodes
          value: "2"
        - name: discovery.seed_hosts
          value: "elasticsearch"
        - name: ES_JAVA_OPTS
          value: "-Xms1024m -Xmx1024m"
        - name: network.host
          value: "0.0.0.0"
  volumeClaimTemplates:
  - metadata:
      name: data
      labels:
        app: elasticsearch
    spec:
      accessModes:
      - "ReadWriteOnce"
      resources:
        requests:
          storage: 10Gi
---
kind: Service
apiVersion: v1
metadata:
  name: elasticsearch
  namespace: logging
  labels:
    app: elasticsearch
spec:
  selector:
    app: elasticsearch
  clusterIP: None
  ports:
    - port: 9200
      name: http-rest
    - port: 9300
      name: http-inter-node

kibana：

apiVersion: v1
kind: Service
metadata:
  name: kibana
  namespace: logging
  labels:
    app: kibana
spec:
  ports:
  - port: 5601
  type: NodePort
  selector:
    app: kibana
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: kibana
  namespace: logging
  labels:
    app: kibana
spec:
  selector:
    matchLabels:
      app: kibana
  template:
    metadata:
      labels:
        app: kibana
    spec:
      containers:
      - name: kibana
        image: docker.elastic.co/kibana/kibana:6.8.23
        resources:
          limits:
            cpu: 1000m
            memory: 1Gi
          requests:
            cpu: 1000m
            memory: 512Mi
        env:
        - name: ELASTICSEARCH_HOSTS
          value: http://elasticsearch:9200
        ports:
        - containerPort: 5601

参考：

https://zhuanlan.zhihu.com/p/428392678