elasticsearch分布式安装

install elasticsearch

• **下载安装jdk8 **

• 下载“elasticsearch-5.5.2.tar.gz”解压到/usr/local/elasticsearch目录下。

• 启动elasticsearch

  es规定root不能启动es,所以创建一个es用户来启动

  #操作系统为centos7.4 虚拟机安装，内存较小。
  useradd es
  passwd es
  
  mkdir elasticsearch/data
  mkdir elasticsearch/logs
  
  chown -R es:es /usr/local/elasticsearch
  

  编辑配置文件config/elasticsearch.yml

  network.host: 0.0.0.0
  http.port: 9200
  

  切换到es用户，启动es

  su es
  ./bin/elasticsearch -d
  

• 可能遇到的错误：

  [1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]

  解决办法：

  vim /etc/security/limits.conf
  
  # 在最后追加
  es hard nofile 65536
  es soft nofile 65536
  

  重新登录es用户，查看是否修改成功

  ulimit -Hn
  65536
  

  问题：

  [2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

  解决：

  vim /etc/sysctl.conf
  
  #在最后追加
  vm.max_map_count=262144
  
  #使用sysctl -p 重新加载查看
  sysctl -p
  

  问题：

  cannot allocate memory…

  解决：

  #减少默认分配的内存大小
  vim config/jvm.options
  
  -Xms512m
  -Xmx512m
  

  
  

• 关闭elasticsearch

  jps | grep elasticsearch
  
  kill -9 {pid}
  

分布式集群部署

---

vim config/elasticsearch.yml

#master

http.cors.enabled: true

http.cors.allow-origin: “*”

cluster.name: abel

node.name: master

node.master: true

#生产环境时换成实际IP

network.host: 0.0.0.0

http.port: 9200

重新解压安装包到另一个目录，修改slave的配置文件

#slave

cluster.name: abel

node.name: slave1

network.host: 0.0.0.0

http.port: 9501

#生产环境时换成实际master ip

discovery.zen.ping.unicast.hosts: [“127.0.0.1”]

elasticsearch-head插件安装

---

• 下载解压

  wget https://github.com/mobz/elasticsearch-head/archive/master.zip
  unzip master.zip
  cd elasticsearch-head-master/
  
  

  
  

• 安装npm

  #先安装nodejs
  curl --silent --location https://rpm.nodesource.com/setup_8.x | bash -
  yum install -y nodejs
  #查看版本
  node -v
  npm -v
  
  npm install
  #国内用这个源
  npm install -g cnpm --registry=https://registry.npm.taobao.org
  
  npm install -g grunt --registry=https://registry.npm.taobao.org
  
  
  #安装grunt依赖包
  npm install grunt-contrib-clean --registry=https://registry.npm.taobao.org
  npm install grunt-contrib-concat --registry=https://registry.npm.taobao.org
  npm install grunt-contrib-watch --registry=https://registry.npm.taobao.org
  npm install grunt-contrib-connect --registry=https://registry.npm.taobao.org
  npm install grunt-contrib-copy --registry=https://registry.npm.taobao.org
  npm install grunt-contrib-jasmine --registry=https://registry.npm.taobao.org
  
  #启动
  npm run start
  

  浏览器中输入9100端口即可打开head插件界面