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本文主要介绍linux下elasticsearch的部署。通过在一台linux服务器中分别对elasticsearch-6.7.2版本，elasticsearch-7.3.0版本来进行安装，记录在安装elasticsearch-7.3.0版本时出现的异常情况，以及elasticsearch-head的安装。

基础环境

本机已经安装、配置了jdk 1.8 版本的继续环境，nodejs环境（elasticsearch-head安装需要）。

使用以下网盘地址，下载需要版本的elasticsearch包

通过网盘分享的文件：elasticsearch-7.3.0-linux-x86_64.tar.gz
链接: https://pan.baidu.com/s/1hSRQgoOvz-aOj1MqcGgMow 提取码: xiao
通过网盘分享的文件：elasticsearch-6.7.2.tar.gz
链接: https://pan.baidu.com/s/1uoHF70mqxB2o_sjx3WzsUA 提取码: xiao

在github中，下载最新的elasticsearch-head包

源码地址：https://github.com/mobz/elasticsearch-head/
安装包地址：https://github.com/mobz/elasticsearch-head/releases/tag/v5.0.0

启动elasticsearch服务不能使用root账号，所以需要新建一个用户，用来启动elasticsearch服务

adduser es
passwd es

安装6.7.2版本

• 解压压缩文件

  cd /data2
  tar -zxvf elasticsearch-6.7.2.tar.gz
  

• 更改配置文件elasticsearch.yml

  path.data: /data2/elasticsearch-6.7.2/data
  path.logs: /data2/elasticsearch-6.7.2/logs
  network.host: 0.0.0.0
  http.port: 8099
  

• 切换es用户启动

  su es
  cd /data2/elasticsearch-6.7.2
  # 后台启动elasticsearch服务
  ./bin/elasticsearch -d
  

• 查看是否启动成功

  1. 查看日志

     cd /data2/elasticsearch-6.7.2/logs
     # 查看日志是否正常启动
     tail -f elasticsearch.log
     

  2. 查看进程

     ps -ef |grep elasticsearch
     

  3. 查看api：http://10.10.87.20:8099/

     {"name" : "6W3MY3q","cluster_name" : "elasticsearch","cluster_uuid" : "Obz1OlM9S4KcLEKN6SYkdg","version" : {"number" : "6.7.2","build_flavor" : "default","build_type" : "tar","build_hash" : "56c6e48","build_date" : "2019-04-29T09:05:50.290371Z","build_snapshot" : false,"lucene_version" : "7.7.0","minimum_wire_compatibility_version" : "5.6.0","minimum_index_compatibility_version" : "5.0.0"},"tagline" : "You Know, for Search"
     }
     

安装7.3.0版本

elasticsearch 7以上版本开始内置了jdk，如本文中部署的7.3.0版本就内置了jdk 11，如果使用的服务器已经安装配置了jdk 1.8的话，可以直接使用elasticsearch-7.3.0自带的jdk。

• 解压压缩文件

  cd /data2
  tar -zxvf elasticsearch-7.3.0-linux-x86_64.tar.gz
  

• 更改配置文件elasticsearch.yml

  path.data: /data2/elasticsearch-7.3.0/data
  path.logs: /data2/elasticsearch-7.3.0/logs
  network.host: 0.0.0.0
  http.port: 19200
  #  以下配置都是出现异常后的，新增的配置 一台服务器中部署两个elasticsearch不同版本的服务
  #  注：node.name 的值要与 cluster.initial_master_nodes 的值保持一致
  node.name: node-2
  discovery.seed_hosts: ["127.0.0.1"]
  cluster.initial_master_nodes: ["node-2"]
  

• 更改配置文件jvm.options

  # 由于在启动时，出现了异常，需要更换GC算法
  #-XX:+UseConcMarkSweepGC
  -XX:+UseG1GC
  

• 更换脚本文件elasticsearch-env

  #if [ ! -z "$JAVA_HOME" ]; then
  #  JAVA="$JAVA_HOME/bin/java"
  #else
  #  if [ "$(uname -s)" = "Darwin" ]; then
  #    # OSX has a different structure
  #    JAVA="$ES_HOME/jdk/Contents/Home/bin/java"
  #  else
  #    JAVA="$ES_HOME/jdk/bin/java"
  #  fi
  #fi
  # 将以上原始的脚本段注释掉，使用以下内容；JAVA 为 elasticsearch自带的jdk的路径
  if [ ! -z "$JAVA_HOME" ]; thenJAVA="/data2/elasticsearch-7.3.0/jdk/bin/java"
  elseif [ "$(uname -s)" = "Darwin" ]; then# OSX has a different structureJAVA="/data2/elasticsearch-7.3.0/jdk/bin/java"elseJAVA="/data2/elasticsearch-7.3.0/jdk/bin/java"fi
  fi
  

• 切换es用户启动

  su es
  cd /data2/elasticsearch-7.3.0
  # 后台启动elasticsearch服务
  ./bin/elasticsearch -d
  

• 查看是否启动成功

  1. 查看日志

     cd /data2/elasticsearch-7.3.0/logs
     # 查看日志是否正常启动
     tail -f elasticsearch.log
     

  2. 查看进程

     ps -ef |grep elasticsearch
     

  3. 查看api：http://10.10.87.20:19200/

     {"name" : "centos74-0.novalocal","cluster_name" : "elasticsearch","cluster_uuid" : "_na_","version" : {"number" : "7.3.0","build_flavor" : "default","build_type" : "tar","build_hash" : "de777fa","build_date" : "2019-07-24T18:30:11.767338Z","build_snapshot" : false,"lucene_version" : "8.1.0","minimum_wire_compatibility_version" : "6.8.0","minimum_index_compatibility_version" : "6.0.0-beta1"},"tagline" : "You Know, for Search"
     }
     

安装elasticsearch异常情况

• 出现以下错误，说明默认走的内置的jdk 11的，便需要更改启动脚本elasticsearch-env中的配置信息

  bash-4.2$ ./bin/elasticsearch -d
  future versions of Elasticsearch will require Java 11; your Java version from [/usr/local/java/jdk1.8.0_73/jre] does not meet this requirement
  

  vim elasticsearch-env# 注释以下 内容
  # now set the path to java
  #if [ ! -z "$JAVA_HOME" ]; then
  #  JAVA="$JAVA_HOME/bin/java"
  #else
  #  if [ "$(uname -s)" = "Darwin" ]; then
  #    # OSX has a different structure
  #    JAVA="$ES_HOME/jdk/Contents/Home/bin/java"
  #  else
  #    JAVA="$ES_HOME/jdk/bin/java"
  #  fi
  #fi
  # 将被注释的配置块，复制一份，将JAVA的信息更给为 elasticsearch自带的jdk的路径
  if [ ! -z "$JAVA_HOME" ]; thenJAVA="/data2/elasticsearch-7.3.0/jdk/bin/java"
  elseif [ "$(uname -s)" = "Darwin" ]; then# OSX has a different structureJAVA="/data2/elasticsearch-7.3.0/jdk/bin/java"elseJAVA="/data2/elasticsearch-7.3.0/jdk/bin/java"fi
  fi

• 出现以下错误，说明需要更换GC算法，便需要更改jvm.options中的配置信息

  OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
  

  cd jvm.options
  # 从ConcMarkSweepGC切换到G1GC
  #-XX:+UseConcMarkSweepGC
  -XX:+UseG1GC
  

• 当启动时出现以下异常信息时，需要更给配置文件elasticsearch.yml中的配置信息

  [2024-11-04T16:58:51,926][ERROR][o.e.b.Bootstrap          ] [centos74-0.novalocal] node validation exception
  [1] bootstrap checks failed
  [1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
  [2024-11-04T16:58:51,929][INFO ][o.e.n.Node               ] [centos74-0.novalocal] stopping ...
  [2024-11-04T16:58:51,951][INFO ][o.e.n.Node               ] [centos74-0.novalocal] stopped
  [2024-11-04T16:58:51,951][INFO ][o.e.n.Node               ] [centos74-0.novalocal] closing ...
  [2024-11-04T16:58:51,965][INFO ][o.e.n.Node               ] [centos74-0.novalocal] closed
  [2024-11-04T16:58:51,968][INFO ][o.e.x.m.p.NativeController] [centos74-0.novalocal] Native controller process has stopped - no new native processes can be started
  

  discovery.seed_hosts: ["127.0.0.1"]
  cluster.initial_master_nodes: ["node-1"]
  

安装elasticsearch-head

• 解压压缩文件

  cd /data2
  tar -zxvf elasticsearch-head-5.0.0.tar.gz
  

• 编辑Gruntfile.js,添加hostname

  vim Gruntfile.jshostname: '*',
  port: 9100,
  base: '.',
  keepalive: true
  

• 更改配置文件elasticsearch.yml

  # 进入安装目录
  cd elasticsearch-head-5.0.0
  # 安装
  npm install --registry=https://registry.npmmirror.com/
  

• 启动服务

  #前台启动
  npm run start
  # 后台启动：
  nohup npm run-script start & 
  

• 查看是否启动成功，访问http://10.10.87.20:9100/

  

安装elasticsearch-head异常情况

当elasticsearch-head启动正常，elasticsearch也启动正常，但是无法通过elasticsearch-head连接elasticsearch服务。

需要更改elasticsearch的配置文件elasticsearch.yml，进行跨域访问。

# 在配置文件末尾添加以下配置
http.cors.enabled: true
http.cors.allow-origin: "*"

重启elasticsearch后，访问http://10.10.87.20:9100/