Ｅlasticsearch-5.1.2集群安装，部署步骤和各种坑及解决方法

elasticsearch-5.1.2 安装，部署

1.准备好3个安装文件

部署elasticsearch-head-master该项目，可以查看elasticsearch的状态

apache-tomcat-8.5.9.tar.gz

elasticsearch-5.1.2.tar.gz

elasticsearch-head-master.zip

2.安装apache-tomcat-8.5.9

tar -zxvf apache-tomcat-8.5.9.tar.gz

3.安装elasticsearch-5.1.2

tar -zxvf elasticsearch-5.1.2.tar.gz

3.1安装好elasticsearch-5.1.2执行如下命令

./elasticsearch

报错：

[2017-01-14T18:35:29,164][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:125) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.cli.Command.main(Command.java:88) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:89) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:82) ~[elasticsearch-5.1.2.jar:5.1.2]

Caused by: java.lang.RuntimeException: can not run elasticsearch as root

at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:100) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:176) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:306) ~[elasticsearch-5.1.2.jar:5.1.2]

at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[elasticsearch-5.1.2.jar:5.1.2]

... 6 more

解决办法：

elasticsearch为了安全起见，不允许使用root用户进行直接操作，所以我们新创建一个用户

创建用户组

groupadd elsearch

创建用户

useradd elsearch -g elsearch -p elsearch

更改elasticsearch-5.1.2 文件夹及内部文件的所属用户及组为elsearch:elsearch

chown -R elsearch:elsearch /data/www/search/es/elasticsearch-5.1.2

切换到elsearch用户下进行执行，启动elasticsearch

停止elasticsearch

修改配置文件elasticsearch.yml

cluster.name: application

node.name: node-3

network.host: 192.168.100.12

http.port: 9200

多次启动以后，由于每一个线程启动以后占用文件个数限制导致elasticsearch无法启动，报错如下

ERROR: bootstrap checks failed

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

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

[2017-01-14T18:50:27,955][INFO ][o.e.n.Node ] [node-3] stopping ...

[2017-01-14T18:50:27,965][INFO ][o.e.n.Node ] [node-3] stopped

[2017-01-14T18:50:27,965][INFO ][o.e.n.Node ] [node-3] closing ...

[2017-01-14T18:50:27,977][INFO ][o.e.n.Node ] [node-3] closed

解决方法：

修改文件个数

vi /etc/sysctl.conf

vm.max_map_count=655360

fs.file-max = 6815744

并执行命令：

sysctl -p

修改文件限制数和进程限制数

vi /etc/security/limits.conf

* soft nofile 65536

* hard nofile 131072

* soft nproc 2048

* hard nproc 4096

vi /etc/security/limits.d/90-nproc.conf

修改如下内容：

* soft nproc 1024

#修改为

* soft nproc 2048

3.2在浏览器的地址栏输入 http://192.168.100.12:9200

若出现如下界面

{

"name" : "node-3",

"cluster_name" : "application",

"cluster_uuid" : "YgeNRQvxRn2mTpWxUWM34A",

"version" : {

"number" : "5.1.2",

"build_hash" : "c8c4c16",

"build_date" : "2017-01-11T20:18:39.146Z",

"build_snapshot" : false,

"lucene_version" : "6.3.0"

"tagline" : "You Know, for Search"

}

恭喜你，elasticsearch

3.3安装elasticsearch-head-master来管理elasticsearch的状态

unzip elasticsearch-head-master.zip

3.4 将elasticsearch-head-master解压以后的_site目录拷贝到tomcat的webapp目录下面，启动tomcat

cp -R /data/www/search/es/elasticsearch-head-master/_site /data/www/search/es/apache-tomcat-8.5.9/webapps/

3.5 修改elasticsearch-head-master中的配置文件，执行elasticsearch可以访问的路径

修改_site/app.js第4328行，将localhost修改成机器的IP

3.6 启动tomcat，出现如下界面，恭喜你，安装成功

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作者：王stone

来源：CSDN

原文：https://blog.csdn.net/wangguoqing_it/article/details/70762743