138 lines
3.8 KiB
Markdown
138 lines
3.8 KiB
Markdown
---
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title: "CentOS7 安装 elasticsearch 集群"
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date: 2019-10-30T01:19:09+08:00
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lastmod: 2019-10-30T01:19:09+08:00
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keywords: []
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tags: ["elasticsearch", "centos"]
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categories: ["database"]
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---
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# 环境
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主机名 | IP | 操作系统 | ES 版本
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---- | ---- | ---- | ----
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es227 | 192.168.1.227 | CentOS7.5 | 6.5.4
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es228 | 192.168.1.228 | CentOS7.5 | 6.5.4
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es229 | 192.168.1.229 | CentOS7.5 | 6.5.4
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- 下载 [elasticsearch-6.5.4.tar.gz](https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.5.4.tar.gz)
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# 各节点初始配置
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- 关闭 selinux、防火墙
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- 部署 java 运行环境
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- 创建 elastic 用户
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```
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useradd -m elastic
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```
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- 创建数据目录
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```
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cd /var/lib
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mkdir elasticsearch
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chown elastic.elastic elasticsearch
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```
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- 创建日志目录
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```
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cd /var/log
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mkdir -p elasticsearch
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chown elastic.elastic elasticsearch
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```
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- 增加 sysctl.conf 配置，执行 sysctl -p 生效
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```
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vm.max_map_count = 262144
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```
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- 增加 /etc/security/limits.conf 配置
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```
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elastic soft nofile 65536
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elastic hard nofile 65536
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elastic soft memlock unlimited
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elastic hard memlock unlimited
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```
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# 部署 ELASTICSEARCH
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- 登陆 es227，下载 elasticsearch，解压至 /opt/ 下
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- 修改 elasticsearch 目录的权限
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```
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chown -R elastic.elastic /opt/elasticsearch
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```
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- 修改 jvm 参数文件 /opt/elasticsearch/config/jvm.options
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- 修改 /opt/elsaticsearch/config/elasticsearch.yml
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```
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cluster.name: TEST_ES_CLUSTER
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node.name: es227
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network.host: 192.168.1.227
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path.data: /var/lib/elasticsearch
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path.logs: /var/log/elasticsearch
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bootstrap.memory_lock: true
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discovery.zen.ping.unicast.hosts: ["192.168.1.227:9300", "192.168.1.228:9300", "192.168.1.229:9300"]
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discovery.zen.minimum_master_nodes: 2
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gateway.recover_after_nodes: 2
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```
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- 打包 elasticsearch 目录，复制到 es228 和 es229 上，并修改 elasticsearch.yml
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```
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# es228
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node.name: es228
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network.host: 192.168.1.228
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# es229
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node.name: es229
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network.host: 192.168.1.229
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```
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# 启动集群(两种启动方式)
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- 直接启动二进制
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- 在每个节点上启动 elasticsearch 服务
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```bash
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su - elastic -c '/opt/elasticsearch/bin/elasticsearch -d'
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```
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- systemd 启动
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- 创建文件 /usr/lib/systemd/system/elasticsearch.service，内容如下
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```
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[Unit]
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Description=ElasticSearch
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Requires=network.service
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After=network.service
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[Service]
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User=elastic
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Group=elastic
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LimitNOFILE=65536
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LimitMEMLOCK=infinity
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Environment=JAVA_HOME=/opt/jre
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ExecStart=/opt/elasticsearch/bin/elasticsearch
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SuccessExitStatus=143
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[Install]
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WantedBy=multi-user.target
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```
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- 启动 elasticsearch 服务
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```bash
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systemctl daemon-reload
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systemctl start elasticsearch
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```
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# 查看集群状态
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- 查看集群节点状态
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```
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# 查看节点状态
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curl http://192.168.1.228:9200/_cat/nodes?pretty
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# 查看集群状态
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curl http://192.168.1.228:9200/_cluster/state?pretty
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```
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# 安装分词插件
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- 登陆 es227，下载插件 [elasticsearch-analysis-ik-6.5.4.zip](https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.5.4/elasticsearch-analysis-ik-6.5.4.zip) 至根目录下
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- 复制该文件至 es228 和 es229 的根目录下
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- 每个节点上安装
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```
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su - elastic
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/opt/elasticsearch/bin/elasticsearch-plugin install file:///elasticsearch-analysis-ik-6.5.4.zip
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```
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- 配置远程扩展字典时，出现 java.net.SocketPermission 拒绝连接，此时需配置 jre 策略
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```
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# vim /opt/jre/lib/security/java.policy，在最后一个 "}" 前追加下面一行
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permission java.net.SocketPermission "*:*","accept,connect,resolve";
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```
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