CentOS7 部署 ElasticSearch7.0.1 集群

环境

主机名	IP	操作系统	ES 版本
test1	192.168.1.2	CentOS7.5	7.0.1
test2	192.168.1.3	CentOS7.5	7.0.1
test3	192.168.1.4	CentOS7.5	7.0.1

下载：

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.0.1-linux-x86_64.tar.gz
或者到官网自行下载：https://www.elastic.co/cn/downloads/elasticsearch

各节点初始配置

• 关闭 selinux、防火墙
• 部署 java 运行环境
• 创建 elastic 用户

  useradd -m elastic 

• 创建数据目录

  cd /var/lib
  mkdir elasticsearch chown elastic.elastic elasticsearch 

• 创建日志目录

  cd /var/log mkdir -p elasticsearch chown elastic.elastic elasticsearch 

• 增加 /etc/sysctl.conf 配置，执行 sysctl -p 生效

  vm.max_map_count = 262144
  

• 增加 /etc/security/limits.conf 配置

  elastic soft nofile 65536 elastic hard nofile 65536 elastic soft memlock unlimited elastic hard memlock unlimited 

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部署 ELASTICSEARCH

• 登陆 test1，下载 elasticsearch，解压至 /opt/ 下
• 修改 elasticsearch 目录的权限

  chown -R elastic.elastic /opt/elasticsearch 

• 修改 jvm 参数文件 /opt/elasticsearch/config/jvm.options
• 修改 /opt/elsaticsearch/config/elasticsearch.yml

  cluster.name: TEST_ES_CLUSTER node.name: test1 network.host: 192.168.1.2
  cluster.initial_master_nodes: ["test1", "test2"] path.data: /var/lib/elasticsearch path.logs: /var/log/elasticsearch bootstrap.memory_lock: true discovery.zen.ping.unicast.hosts: ["192.168.1.2", "192.168.1.3", "192.168.1.4"] discovery.zen.minimum_master_nodes: 2 gateway.recover_after_nodes: 2 

• 打包 elasticsearch 目录，复制到 test2 和 test3 上，并修改 elasticsearch.yml

  # test2 node.name: test2 network.host: 192.168.1.3 # test3 node.name: test3 network.host: 192.168.1.4 

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启动集群(两种启动方式)

• 直接启动二进制
  • 在每个节点上启动 elasticsearch 服务

    su - elastic -c '/opt/elasticsearch/bin/elasticsearch -d' 

• systemd 启动
  • 创建文件 /usr/lib/systemd/system/elasticsearch.service，内容如下

    [Unit] Description=ElasticSearch Requires=network.service After=network.service [Service] User=elastic Group=elastic LimitNOFILE=65536 LimitMEMLOCK=infinity Environment=JAVA_HOME=/opt/jre ExecStart=/opt/elasticsearch/bin/elasticsearch SuccessExitStatus=143 [Install] WantedBy=multi-user.target 

  • 启动 elasticsearch 服务

    systemctl daemon-reload
    systemctl start elasticsearch
    

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查看集群状态

• 查看集群节点状态

  # 查看节点状态 curl http://192.168.1.2:9200/_cat/nodes?pretty # 查看集群状态 curl http://192.168.1.2:9200/_cluster/state?pretty 

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安装分词插件

• 登陆 test1，下载插件 elasticsearch-analysis-ik-7.0.1.zip 至根目录下 地址：https://github.com/medcl/elasticsearch-analysis-ik/releases
• 复制该文件至 test2 和 test3 的根目录下
• 每个节点上安装

  su - elastic
  /opt/elasticsearch/bin/elasticsearch-plugin install file:///elasticsearch-analysis-ik-7.0.1.zip 

• 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

  # vim /opt/jre/lib/security/java.policy，在最后一个 "}" 前追加下面一行 permission java.net.SocketPermission "*:*","accept,connect,resolve";

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