elasticsearch 单机环境搭建

实验环境

操作系统：ubuntu-16.04-x64
jdk版本：1.8
主机ip：192.168.103.19

elasticsearch 安装步骤

1.安装前准备

1.安装jdk-1.8,详细过程不再赘述

2.下载es安装包

下载es安装包，点击这里获取elasticsearch（5.6.9）版本

3.解压安装包

# tar xf tar xf elasticsearch-5.6.9.tar.gz

4.启动es

# cd elasticsearch-5.6.9/bin
# ./elasticsearch

如果是root用户，还需要进行以下步骤

• 如果root用户启动会出现以下错误

   [2018-05-07T16:35:02,769][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
   org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
   at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-5.6.9.jar:5.6.9]
   at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:123) ~[elasticsearch-5.6.9.jar:5.6.9]
   at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:70) ~[elasticsearch-5.6.9.jar:5.6.9]
   at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:134) ~[elasticsearch-5.6.9.jar:5.6.9]
  

• 创建es用户组及es用户

   root# groupadd es     #创建es组
   root# useradd es -g es -p es  -m  #创建es用户，password为es并为es用户创建家目录
  

• 更改elasticsearch文件夹及内部文件的所属用户及组为es:es

   root# chown -R es:es /root/elasticsearch-5.6.9
   root# mv /root/elasticsearch-5.6.9 /home/es  #必须要拷贝到es用户家目录下，否则再次执行时可能报权限异常的错误
  

• 切换到es用户再启动

   root# su es
   es$ cd /root/elasticsearch-5.6.9
   es$ ./elasticsearch
  

• 启动后输出信息如下信息

   [2018-05-07T17:32:48,422][INFO ][o.e.n.Node               ] [Gtam_2R] starting ...
   [2018-05-07T17:32:48,676][INFO ][o.e.t.TransportService   ] [Gtam_2R] publish_address {127.0.0.1:9300}, bound_addresses {[::1]:9300}, {127.0.0.1:9300}
   [2018-05-07T17:32:48,703][WARN ][o.e.b.BootstrapChecks    ] [Gtam_2R] max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
   [2018-05-07T17:32:51,794][INFO ][o.e.c.s.ClusterService   ] [Gtam_2R] new_master {Gtam_2R}{Gtam_2RoQNCCTh4goSaEkg}{WDRxkq8oRhqha2kZg0xKmQ}{127.0.0.1}{127.0.0.1:9300}, reason: zen-disco-elected-as-master ([0] nodes joined)[, ]
   [2018-05-07T17:32:51,828][INFO ][o.e.h.n.Netty4HttpServerTransport] [Gtam_2R] publish_address {127.0.0.1:9200}, bound_addresses {[::1]:9200}, {127.0.0.1:9200}
   [2018-05-07T17:32:51,829][INFO ][o.e.n.Node               ] [Gtam_2R] started
   [2018-05-07T17:32:51,887][INFO ][o.e.g.GatewayService     ] [Gtam_2R] recovered [0] indices into cluster_state
  

ElasticSearch后端启动命令

./elasticsearch -d

elasticsearch的对外服务端口默认是9200，在本机通过curl命令或者浏览器访问：

es$ curl  http://127.0.0.1:9200

输出结果

{
	 "name" : "Gtam_2R",
	 "cluster_name" : "elasticsearch",
	 "cluster_uuid" : "xqnDcCMGTCGdNbGVLQd1_A",
	 "version" : {
	    "number" : "5.6.9",
	    "build_hash" : "877a590",
	    "build_date" : "2018-04-12T16:25:14.838Z",
	    "build_snapshot" : false,
	    "lucene_version" : "6.6.1"
	  },
	"tagline" : "You Know, for Search"
}

如果需要远程访问，还需要以下步骤

• 修改elasticsearch-5.6.9\config\elasticsearch.yml文件

    vim conf/elasticsearch.yml
  

  修改network.host: 0.0.0.0
  再次启动elasticsearch可能出现以下错误

   ERROR: [1] bootstrap checks failed
   [1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
  

• 修改系统配置

   vim /etc/sysctl.conf
  

修改

	vm.max_map_count = 262144

保存之后sysctl -p使设置生效

	# sysctl -p 	

• 至此可以远程访问elasticsearch服务了

  

head 插件安装

1.下载elasticsearch-head插件

从这里下载elasticsearch-head

2.启动head插件

elasticsearch-head插件依赖于node环境，具体的搭建过程可以参考网上的教程。

cd elasticsearch-head
npm install
npm run start

插件启动后，通过浏览器访问9100端口。

中文分词插件安装