虚拟机centos7安装
https://blog.csdn.net/qq_44714603/article/details/88829423
centos7安装elasticsearch
官网下载Linux压缩包
https://www.elastic.co/cn/downloads/elasticsearch
放置/opt/elasticsearch目录下，解压：
tar -zxvf elasticsearch-7.14.1-linux-x86_64.tar.gz
再/bin目录下启动(其中应该会有很多错误，比如jvm大小的设置等等，jvm内存默认为4g，本地的话应该适当改小，其他百度解决即可)：
./elasticsearch
另外centos7需要安装Java8才能启动elasticsearch，我安装的centos7已经内嵌Java8了，所以省略这一步。
检查启动效果：
下载可视化插件elasticsearch-head
直接下载到宿主机，打通虚拟机和宿主机的网络，让宿主机的head插件访问虚拟机的elasticsearch。
下载npm：
教程
下载elasticsearch-head：
教程
配置宿主机和虚拟机的网络端口映射：
启动elasticsearch-head，直接访问localhost:9100
克隆第一台centos7，并彼此ping通网络
先要将虚拟机centos7关闭，在虚拟机上右击–>管理–>克隆–>克隆自虚拟机中当前状态–>克隆方法：创建完整克隆–>填写虚拟机名称和存储目录–>点击完成等待克隆成功。
启动克隆的新的虚拟机，修改hostname
vi /etc/hostname
重启虚拟机hostname生效
修改IP地址
vi /etc/sysconfig/network-scripts/ifcfg-ens33 TYPE="Ethernet" PROXY_METHOD="none" BROWSER_onLY="no" BOOTPROTO="static" DEFROUTE="yes" IPV4_FAILURE_FATAL="no" IPV6INIT="yes" IPV6_AUTOCONF="yes" IPV6_DEFROUTE="yes" IPV6_FAILURE_FATAL="no" IPV6_ADDR_GEN_MODE="stable-privacy" NAME="ens33" UUID="5dbf7422-5bd2-42b5-87ca-ca339717fe20" DEVICE="ens33" IPADDR=192.168.100.3 NETMASK=255.255.255.0 GATEWAY=192.168.100.2 onBOOT=yes
修改hosts文件
vi /etc/hosts #添加一下映射 192.168.100.3 elasticsearch-01 192.168.100.5 elasticsearch-02 192.168.100.7 elasticsearch-03
重启网络，然后互相pingIP地址测试连通性：
systemctl restart network
配置elasticsearch集群
前提：可以成为主节点数应该是集群总结点N/2+1，所以应该将两个节点设置为node.master: true。另外elasticsearch-01、elasticsearch-02、elasticsearch-03分别是master节点、client路由节点、和data数据节点，client节点不存储数据。
修改各虚拟机的elasticsearch的配置文件elasticsearch.yml
elasticsearch-01:
# ======================== Elasticsearch Configuration ========================= # # NOTE: Elasticsearch comes with reasonable defaults for most settings. # Before you set out to tweak and tune the configuration, make sure you # understand what are you trying to accomplish and the consequences. # # The primary way of configuring a node is via this file. This template lists # the most important settings you may want to configure for a production cluster. # # Please consult the documentation for further information on configuration options: # https://www.elastic.co/guide/en/elasticsearch/reference/index.html # # ---------------------------------- Cluster ----------------------------------- # # Use a descriptive name for your cluster: # cluster.name: elasticsearch # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: node-01 node.master: true node.data: true # # Add custom attributes to the node: # #node.attr.rack: r1 # # ----------------------------------- Paths ------------------------------------ # # Path to directory where to store the data (separate multiple locations by comma): # #path.data: /path/to/data # # Path to log files: # #path.logs: /path/to/logs # # ----------------------------------- Memory ----------------------------------- # # Lock the memory on startup: # #bootstrap.memory_lock: true # # Make sure that the heap size is set to about half the memory available # on the system and that the owner of the process is allowed to use this # limit. # # Elasticsearch performs poorly when the system is swapping the memory. # # ---------------------------------- Network ----------------------------------- # # By default Elasticsearch is only accessible on localhost. Set a different # address here to expose this node on the network: # network.host: 192.168.100.3 # # By default Elasticsearch listens for HTTP traffic on the first free port it # finds starting at 9200. Set a specific HTTP port here: # http.port: 9200 # # For more information, consult the network module documentation. # # --------------------------------- Discovery ---------------------------------- # # Pass an initial list of hosts to perform discovery when this node is started: # The default list of hosts is ["127.0.0.1", "[::1]"] # transport.port: 9300 discovery.seed_hosts: ["192.168.100.3:9300", "192.168.100.5:9300", "192.168.100.7:9300"] # # Bootstrap the cluster using an initial set of master-eligible nodes: # cluster.initial_master_nodes: ["node-01"] # # For more information, consult the discovery and cluster formation module documentation. # # ---------------------------------- Various ----------------------------------- # # Require explicit names when deleting indices: # #action.destructive_requires_name: true http.cors.enabled: true http.cors.allow-origin: "*"
elasticsearch-02需要改动的配置：
node.name: node-02 node.master: true node.data: false network.host: 192.168.100.5 #cluster.initial_master_nodes: ["node-01"]
elasticsearch-03需要改动的配置：
node.name: node-03 node.master: false node.data: true network.host: 192.168.100.7 #cluster.initial_master_nodes: ["node-01"]
修改完成启动分别启动master、client、data节点，启动前先将克隆的两个节点中的data目录删除。
启动完成后再利用head插件查看集群状态。
到此elasticsearch集群搭建完成。
