K8S StatefulSet方式部署elasticsearch集群 —

直接上yaml内容

# es-cluster.yaml
apiVersion: apps/v1
# 设置控制器
kind: StatefulSet
metadata:name: es-clusternamespace: merry
spec:# 必须设置serviceName: es-cluster-svc# 设置副本数replicas: 3# 设置选择器selector:# 设置标签matchLabels:app: es-net-datatemplate:metadata:# 此处必须要与上面的matchLabels相同labels: app: es-net-dataspec:# 初始化容器# 初始化容器的作用是在应用容器启动之前做准备工作，每个init容器都必须在下一个启动之前成功完成initContainers:- name: increase-vm-max-mapimage: busybox:1.32command: ["sysctl", "-w", "vm.max_map_count=262144"]securityContext:privileged: true- name: increase-fd-ulimitimage: busybox:1.32command: ["sh", "-c", "ulimit -n 65536"]securityContext:privileged: true# 初始化容器结束后，才能继续创建下面的容器containers:- name: es-containerimage: elasticsearch:7.6.2ports:# 容器内端口- name: restcontainerPort: 9200protocol: TCP# 限制CPU数量resources:limits:cpu: 1000mrequests:cpu: 100m # 设置挂载目录volumeMounts:- name: es-datamountPath: /usr/share/elasticsearch/data# 设置环境变量env:# 自定义集群名- name: cluster.namevalue: k8s-es# 定义节点名，使用metadata.name名称- name: node.namevalueFrom:fieldRef:fieldPath: metadata.name# 初始化集群时，ES从中选出master节点- name: cluster.initial_master_nodes# 对应metadata.name名称加编号，编号从0开始value: "es-cluster-0,es-cluster-1,es-cluster-2"- name: discovery.zen.minimum_master_nodesvalue: "2" # 发现节点的地址，discovery.seed_hosts的值应包括所有master候选节点# 如果discovery.seed_hosts的值是一个域名，且该域名解析到多个IP地址，那么es将处理其所有解析的IP地址。- name: discovery.seed_hostsvalue: "es-cluster-svc"# 配置内存- name: ES_JAVA_OPTSvalue: "-Xms1g -Xmx1g"- name: network.hostvalue: "0.0.0.0" volumeClaimTemplates:- metadata:# 对应容器中volumeMounts.namename: es-datalabels:app: es-volumespec:# 存储卷可以被单个节点读写accessModes: [ "ReadWriteOnce" ]# 对应es-nfs-storage-class.yaml中的metadata.namestorageClassName: es-nfs-storage # 申请资源的大小resources:requests:storage: 10Gi
---
# es-service.yaml
apiVersion: v1
kind: Service
metadata:name: es-cluster-svcnamespace: merry
spec:selector:# 注意一定要与"es-cluster.yaml"中spec.selector.matchLabels相同app: es-net-data# 设置服务类型type: NodePortports:- name: rest# 服务端口port: 9200# 应用端口（Pod端口）targetPort: 9200# 映射到主机的端口，端口范围是30000~32767nodePort: 32000- name: socket9300port: 9300targetPort: 9300nodePort: 39300
---

能看懂的人都能明白！

------------------------------------------------改进版本如下----------------------------------------------------------

主要改进地方：

1. 添加时区的环境变量，修改cluster.name值为docker-cluster

2.初始化容器指定数据目录权限

3.添加无头服务headless

apiVersion: apps/v1
kind: StatefulSet
metadata:namespace: merryname: es-cluster
spec:serviceName: elasticsearch-svc-headlessreplicas: 3selector:matchLabels:app: elasticsearchtemplate:metadata:labels:app: elasticsearchspec:initContainers:- name: permissionsimage: busybox:latestcommand: ["sh", "-c", "chown -R 1000:1000 /usr/share/elasticsearch/data"]securityContext:privileged: truevolumeMounts:- name: datamountPath: /usr/share/elasticsearch/data- name: increase-vm-max-mapimage: busybox:latestcommand: ["sysctl", "-w", "vm.max_map_count=262144"]securityContext:privileged: true- name: increase-fd-ulimitimage: busybox:latestcommand: ["sh", "-c", "ulimit -n 65536"]securityContext:privileged: truecontainers:- name: elasticsearchimage: elasticsearch:7.10.2-analysis-hanlpresources:limits:cpu: 1000mrequests:cpu: 100mports:- containerPort: 9200name: restprotocol: TCP- containerPort: 9300name: socketprotocol: TCPvolumeMounts:- name: datamountPath: /usr/share/elasticsearch/dataenv:- name: TZvalue: Asia/Shanghai- name: cluster.namevalue: docker-cluster- name: node.namevalueFrom:fieldRef:fieldPath: metadata.name- name: discovery.seed_hostsvalue: "es-cluster-0.elasticsearch-svc-headless,es-cluster-1.elasticsearch-svc-headless,es-cluster-2.elasticsearch-svc-headless"- name: cluster.initial_master_nodesvalue: "es-cluster-0,es-cluster-1,es-cluster-2"- name: ES_JAVA_OPTSvalue: "-Xms512m -Xmx512m"- name: discovery.zen.minimum_master_nodesvalue: "2"- name: network.hostvalue: "0.0.0.0"volumeClaimTemplates:- metadata:name: datalabels:app: elasticsearchspec:accessModes: [ "ReadWriteOnce" ]storageClassName: managed-nfs-storageresources:requests:storage: 1000Gi
---
kind: Service
apiVersion: v1
metadata:namespace: merryname: elasticsearch-svc-headlesslabels:app: elasticsearch
spec:selector:app: elasticsearchclusterIP: Noneports:- port: 9200name: rest- port: 9300name: socket
---
kind: Service
apiVersion: v1
metadata:namespace: merryname: elasticsearch-svclabels:app: elasticsearch
spec:selector:app: elasticsearchtype: NodePortports:- port: 9200name: rest- port: 9300name: socket

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K8S StatefulSet方式部署elasticsearch集群 —— 筑梦之路

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