Elasticsearch全文检索学习

ElasticSearch官方网址：https://www.elastic.co

ElasticSearch官方网址（中文）：https://www.elastic.co/cn/

Elasticsearch 权威指南（中文版文档，在线观看）：https://es.xiaoleilu.com/

1、ElasticSearch是一个基于Lucene的搜索服务器。它提供了一个分布式多用户能力的全文搜索引擎，基于RESTful web接口。Elasticsearch是用Java语言开发的，并作为Apache许可条款下的开放源码发布，是一种流行的企业级搜索引擎。ElasticSearch用于云计算中，能够达到实时搜索，稳定，可靠，快速，安装使用方便。官方客户端在Java、.NET（C#）、PHP、Python、Apache Groovy、Ruby和许多其他语言中都是可用的。根据DB-Engines的排名显示，Elasticsearch是最受欢迎的企业搜索引擎，其次是Apache Solr，也是基于Lucene。

2、Elastic Stack生态（简称ELK Stack，包括 Elasticsearch、Kibana、Beats 和 Logstash）。Elasticsearch是与名为Logstash的数据收集和日志解析引擎以及名为Kibana的分析和可视化平台一起开发的。

　　a、Elasticsearch 是一个分布式的 RESTful 搜索和分析引擎，可用来集中存储您的数据，以便您对形形色色、规模不一的数据进行搜索、索引和分析。Elasticsearch 是一个基于 JSON 的分布式搜索和分析引擎。

　　b、Logstash 是一个开源的数据采集引擎，具有实时管道传输功能。Logstash 能够将来自单独数据源的数据动态集中到一起，对这些数据加以标准化并传输到您所选的地方。清理并民主化您的全部数据，将其用于多样化的高级下游分析和可视化用例。Logstash 是动态数据收集管道，拥有可扩展的插件生态系统。

　　c、Kibana，您可以对自己的 Elasticsearch 进行可视化，还可以在 Elastic Stack 中进行导航，这样您便可以进行各种操作了，从跟踪查询负载，到理解请求如何流经您的整个应用，都能轻松完成。Kibana 可谓 Elastic Stack 的窗户。探索数据并管理堆栈。

　　d、Beats 是一个面向轻量型采集器的平台，这些采集器可从边缘机器发送数据。Beats 平台集合了多种单一用途数据采集器。它们从成百上千或成千上万台机器和系统向 Logstash 或 Elasticsearch 发送数据。

3、ElasticSearch的下载安装。这里使用elasticsearch-5.4.3.tar.gz，使用CentOS7进行安装。版本进行学习，其实截至目前，Elasticsearch已经发布到Elasticsearch 7.4.0版本了。

将下载好的elasticsearch-5.4.3.tar.gz开始进行安装。

注意：安装elasticsearch之前安装好java，因为elasticsearch是java语言开发的，注意选择java的版本是1.8.0的第20版本以后的，第20之前的会出现很多问题。我使用的1.8.0_181，我用的181版本的，也是出现不少问题。

1 [root@slaver4 package]# tar -zxvf elasticsearch-5.4.3.tar.gz -C /home/hadoop/soft/

可以查看其目录结构信息，如下所示：

 1 [root@slaver4 soft]# ls
 2 elasticsearch-5.4.3
 3 [root@slaver4 soft]# cd elasticsearch-5.4.3/
 4 [root@slaver4 elasticsearch-5.4.3]# ls
 5 bin  config  lib  LICENSE.txt  modules  NOTICE.txt  plugins  README.textile
 6 [root@slaver4 elasticsearch-5.4.3]# ll
 7 total 224
 8 drwxr-xr-x.  2 root root   4096 Oct  9 22:06 bin　　　　　  #启动脚本目录
 9 drwxr-xr-x.  2 root root     75 Jun 22  2017 config　　　　 #配置文件目录
10 drwxr-xr-x.  2 root root   4096 Jun 22  2017 lib　　　　　　 #依赖jar包目录
11 -rw-r--r--.  1 root root  11358 Jun 22  2017 LICENSE.txt
12 drwxr-xr-x. 12 root root    217 Jun 22  2017 modules　　　 #模块目录　
13 -rw-r--r--.  1 root root 194187 Jun 22  2017 NOTICE.txt
14 drwxr-xr-x.  2 root root      6 Jun 22  2017 plugins　　　 #第三方插件的目录
15 -rw-r--r--.  1 root root   9548 Jun 22  2017 README.textile
16 [root@slaver4 elasticsearch-5.4.3]#

启动ElasticSearch，如下所示：

启动过程中我的报错了，分析一下错误原因。

1 [root@slaver4 elasticsearch-5.4.3]# sh ./bin/elasticsearch
2 Java HotSpot(TM) Server VM warning: INFO: os::commit_memory(0x6ac00000, 2080374784, 0) failed; error='Cannot allocate memory' (errno=12)
3 #
4 # There is insufficient memory for the Java Runtime Environment to continue.
5 # Native memory allocation (mmap) failed to map 2080374784 bytes for committing reserved memory.
6 # An error report file with more information is saved as:
7 # /home/hadoop/soft/elasticsearch-5.4.3/hs_err_pid11491.log

由于elasticsearch5.x版本默认分配jvm空间大小为2g，修改jvm空间分配。（备注：我的虚拟机给了1G的内存，如果硬件较好，可以多给内存）。

再次启动报如下所示错误：

 1 [root@slaver4 elasticsearch-5.4.3]# sh ./bin/elasticsearch
 2 [2019-10-09T22:29:26,389][WARN ][o.e.b.Natives            ] unable to load JNA native support library, native methods will be disabled.
 3 java.lang.UnsatisfiedLinkError: Native library (com/sun/jna/linux-x86/libjnidispatch.so) not found in resource path ([file:/home/hadoop/soft/elasticsearch-5.4.3/lib/elasticsearch-5.4.3.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-core-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-analyzers-common-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-backward-codecs-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-grouping-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-highlighter-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-join-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-memory-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-misc-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-queries-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-queryparser-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-sandbox-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-spatial-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-spatial-extras-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-spatial3d-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/lucene-suggest-6.5.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/securesm-1.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/jopt-simple-5.0.2.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/hppc-0.7.1.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/joda-time-2.9.5.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/snakeyaml-1.15.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/jackson-core-2.8.6.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/jackson-dataformat-smile-2.8.6.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/jackson-dataformat-yaml-2.8.6.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/jackson-dataformat-cbor-2.8.6.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/t-digest-3.0.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/HdrHistogram-2.1.9.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/spatial4j-0.6.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/jts-1.13.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/log4j-api-2.8.2.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/log4j-core-2.8.2.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/log4j-1.2-api-2.8.2.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/jna-4.4.0.jar, file:/home/hadoop/soft/elasticsearch-5.4.3/lib/java-version-checker-5.4.3.jar])
 4     at com.sun.jna.Native.loadNativeDispatchLibraryFromClasspath(Native.java:962) ~[jna-4.4.0.jar:4.4.0 (b0)]
 5     at com.sun.jna.Native.loadNativeDispatchLibrary(Native.java:922) ~[jna-4.4.0.jar:4.4.0 (b0)]
 6     at com.sun.jna.Native.(Native.java:190) ~[jna-4.4.0.jar:4.4.0 (b0)]
 7     at java.lang.Class.forName0(Native Method) ~[?:1.8.0_191]
 8     at java.lang.Class.forName(Class.java:264) ~[?:1.8.0_191]
 9     at org.elasticsearch.bootstrap.Natives.(Natives.java:45) [elasticsearch-5.4.3.jar:5.4.3]
10     at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:105) [elasticsearch-5.4.3.jar:5.4.3]
11     at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:194) [elasticsearch-5.4.3.jar:5.4.3]
12     at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:350) [elasticsearch-5.4.3.jar:5.4.3]
13     at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) [elasticsearch-5.4.3.jar:5.4.3]
14     at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) [elasticsearch-5.4.3.jar:5.4.3]
15     at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67) [elasticsearch-5.4.3.jar:5.4.3]
16     at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) [elasticsearch-5.4.3.jar:5.4.3]
17     at org.elasticsearch.cli.Command.main(Command.java:88) [elasticsearch-5.4.3.jar:5.4.3]
18     at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) [elasticsearch-5.4.3.jar:5.4.3]
19     at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) [elasticsearch-5.4.3.jar:5.4.3]
20 [2019-10-09T22:29:26,399][WARN ][o.e.b.Natives            ] cannot check if running as root because JNA is not available
21 [2019-10-09T22:29:26,399][WARN ][o.e.b.Natives            ] cannot install system call filter because JNA is not available
22 [2019-10-09T22:29:26,400][WARN ][o.e.b.Natives            ] cannot register console handler because JNA is not available
23 [2019-10-09T22:29:26,401][WARN ][o.e.b.Natives            ] cannot getrlimit RLIMIT_NPROC because JNA is not available
24 [2019-10-09T22:29:26,401][WARN ][o.e.b.Natives            ] cannot getrlimit RLIMIT_AS beacuse JNA is not available
25 [2019-10-09T22:29:26,764][INFO ][o.e.n.Node               ] [] initializing ...
26 [2019-10-09T22:29:26,884][INFO ][o.e.e.NodeEnvironment    ] [rYUCm8s] using [1] data paths, mounts [[/ (rootfs)]], net usable_space [10.9gb], net total_space [17.7gb], spins? [unknown], types [rootfs]
27 [2019-10-09T22:29:26,884][INFO ][o.e.e.NodeEnvironment    ] [rYUCm8s] heap size [505.6mb], compressed ordinary object pointers [unknown]
28 [2019-10-09T22:29:26,886][INFO ][o.e.n.Node               ] node name [rYUCm8s] derived from node ID [rYUCm8sMRzaXu84zRj3duQ]; set [node.name] to override
29 [2019-10-09T22:29:26,886][INFO ][o.e.n.Node               ] version[5.4.3], pid[11871], build[eed30a8/2017-06-22T00:34:03.743Z], OS[Linux/3.10.0-957.el7.x86_64/i386], JVM[Oracle Corporation/Java HotSpot(TM) Server VM/1.8.0_191/25.191-b12]
30 [2019-10-09T22:29:26,887][INFO ][o.e.n.Node               ] JVM arguments [-Xms512m, -Xmx512m, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -XX:+DisableExplicitGC, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -Djdk.io.permissionsUseCanonicalPath=true, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Dlog4j.skipJansi=true, -XX:+HeapDumpOnOutOfMemoryError, -Des.path.home=/home/hadoop/soft/elasticsearch-5.4.3]
31 [2019-10-09T22:29:29,878][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [aggs-matrix-stats]
32 [2019-10-09T22:29:29,878][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [ingest-common]
33 [2019-10-09T22:29:29,878][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-expression]
34 [2019-10-09T22:29:29,878][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-groovy]
35 [2019-10-09T22:29:29,878][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-mustache]
36 [2019-10-09T22:29:29,878][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-painless]
37 [2019-10-09T22:29:29,878][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [percolator]
38 [2019-10-09T22:29:29,879][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [reindex]
39 [2019-10-09T22:29:29,879][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [transport-netty3]
40 [2019-10-09T22:29:29,879][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [transport-netty4]
41 [2019-10-09T22:29:29,879][INFO ][o.e.p.PluginsService     ] [rYUCm8s] no plugins loaded
42 [2019-10-09T22:29:34,820][INFO ][o.e.d.DiscoveryModule    ] [rYUCm8s] using discovery type [zen]
43 [2019-10-09T22:29:36,045][INFO ][o.e.n.Node               ] initialized
44 [2019-10-09T22:29:36,045][INFO ][o.e.n.Node               ] [rYUCm8s] starting ...
45 [2019-10-09T22:29:36,285][INFO ][o.e.t.TransportService   ] [rYUCm8s] publish_address {127.0.0.1:9300}, bound_addresses {[::1]:9300}, {127.0.0.1:9300}
46 [2019-10-09T22:29:36,341][WARN ][o.e.b.BootstrapChecks    ] [rYUCm8s] max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
47 [2019-10-09T22:29:36,341][WARN ][o.e.b.BootstrapChecks    ] [rYUCm8s] max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
48 [2019-10-09T22:29:36,341][WARN ][o.e.b.BootstrapChecks    ] [rYUCm8s] system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
49 [2019-10-09T22:29:39,434][INFO ][o.e.c.s.ClusterService   ] [rYUCm8s] new_master {rYUCm8s}{rYUCm8sMRzaXu84zRj3duQ}{NzmJVJKWRTaua11gn8v4Tw}{127.0.0.1}{127.0.0.1:9300}, reason: zen-disco-elected-as-master ([0] nodes joined)
50 [2019-10-09T22:29:39,542][INFO ][o.e.g.GatewayService     ] [rYUCm8s] recovered [0] indices into cluster_state
51 [2019-10-09T22:29:39,559][INFO ][o.e.h.n.Netty4HttpServerTransport] [rYUCm8s] publish_address {127.0.0.1:9200}, bound_addresses {[::1]:9200}, {127.0.0.1:9200}
52 [2019-10-09T22:29:39,585][INFO ][o.e.n.Node               ] [rYUCm8s] started

解决方法如下所示：

直接删除或备份Elasticsearch-a.b.c/lib目录下面的jna文件：

然后在/home/hadoop/soft/elasticsearch-5.4.3/lib目录下载这个包，wget http://repo1.maven.org/maven2/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar。

 1 [root@slaver4 lib]# mv jna-4.4.0.jar jna-4.4.0.jar.bak
 2 [root@slaver4 lib]# wget http://repo1.maven.org/maven2/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar
 3 --2019-10-09 22:36:07--  http://repo1.maven.org/maven2/net/java/dev/jna/jna/4.4.0/jna-4.4.0.jar
 4 Resolving repo1.maven.org (repo1.maven.org)... 151.101.24.209
 5 Connecting to repo1.maven.org (repo1.maven.org)|151.101.24.209|:80... connected.
 6 HTTP request sent, awaiting response... 200 OK
 7 Length: 1091208 (1.0M) [application/java-archive]
 8 Saving to: ‘jna-4.4.0.jar’
 9 
10 100%[==========================================================================================>] 1,091,208    129KB/s   in 7.0s   
11 
12 2019-10-09 22:36:15 (151 KB/s) - ‘jna-4.4.0.jar’ saved [1091208/1091208]
13 
14 [root@slaver4 lib]# 

再次启动ElasticSearch，报了如下所示的错误。

 1 [root@slaver4 elasticsearch-5.4.3]# sh ./bin/elasticsearch
 2 [2019-10-09T22:36:38,150][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
 3 org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
 4     at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:127) ~[elasticsearch-5.4.3.jar:5.4.3]
 5     at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) ~[elasticsearch-5.4.3.jar:5.4.3]
 6     at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67) ~[elasticsearch-5.4.3.jar:5.4.3]
 7     at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) ~[elasticsearch-5.4.3.jar:5.4.3]
 8     at org.elasticsearch.cli.Command.main(Command.java:88) ~[elasticsearch-5.4.3.jar:5.4.3]
 9     at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) ~[elasticsearch-5.4.3.jar:5.4.3]
10     at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) ~[elasticsearch-5.4.3.jar:5.4.3]
11 Caused by: java.lang.RuntimeException: can not run elasticsearch as root
12     at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:106) ~[elasticsearch-5.4.3.jar:5.4.3]
13     at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:194) ~[elasticsearch-5.4.3.jar:5.4.3]
14     at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:350) ~[elasticsearch-5.4.3.jar:5.4.3]
15     at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) ~[elasticsearch-5.4.3.jar:5.4.3]
16     ... 6 more
17 [root@slaver4 elasticsearch-5.4.3]#

这应该是ElasticSearch不允许使用root用户进行启动。所以先创建一个用户组elsearch，再创建用户elsearch，再将解压缩后的目录权限赋予这个新用户即可。更改elasticsearch文件夹及内部文件的所属用户及组为elsearch:elsearch。切换到elsearch用户再启动。

 1 [root@slaver4 ~]# groupadd elsearch
 2 [root@slaver4 ~]# useradd elsearch -g elsearch 
 3 [root@slaver4 ~]# passwd elsearch
 4 Changing password for user elsearch.
 5 New password: 
 6 BAD PASSWORD: The password contains the user name in some form
 7 Retype new password: 
 8 passwd: all authentication tokens updated successfully.
 9 [root@slaver4 ~]# cd /home/hadoop/soft/
10 [root@slaver4 soft]# ls
11 elasticsearch-5.4.3
12 [root@slaver4 soft]# chown -R elsearch:elsearch elasticsearch-5.4.3/
13 [root@slaver4 soft]# su elsearch
14 [elsearch@slaver4 soft]$ ls
15 elasticsearch-5.4.3
16 [elsearch@slaver4 soft]$ cd elasticsearch-5.4.3/
17 [elsearch@slaver4 elasticsearch-5.4.3]$ ls
18 bin  config  data  hs_err_pid11491.log  lib  LICENSE.txt  logs  modules  NOTICE.txt  plugins  README.textile

再次启动如下所示：

如果启动成功是可以看到started的。127.0.0.1:9200。ElasticSearch默认监听的就是9200端口号的。

 1 [elsearch@slaver4 elasticsearch-5.4.3]$ sh ./bin/elasticsearch
 2 [2019-10-09T22:44:57,760][INFO ][o.e.n.Node               ] [] initializing ...
 3 [2019-10-09T22:44:57,938][INFO ][o.e.e.NodeEnvironment    ] [rYUCm8s] using [1] data paths, mounts [[/ (rootfs)]], net usable_space [10.9gb], net total_space [17.7gb], spins? [unknown], types [rootfs]
 4 [2019-10-09T22:44:57,938][INFO ][o.e.e.NodeEnvironment    ] [rYUCm8s] heap size [505.6mb], compressed ordinary object pointers [unknown]
 5 [2019-10-09T22:44:57,944][INFO ][o.e.n.Node               ] node name [rYUCm8s] derived from node ID [rYUCm8sMRzaXu84zRj3duQ]; set [node.name] to override
 6 [2019-10-09T22:44:57,945][INFO ][o.e.n.Node               ] version[5.4.3], pid[12234], build[eed30a8/2017-06-22T00:34:03.743Z], OS[Linux/3.10.0-957.el7.x86_64/i386], JVM[Oracle Corporation/Java HotSpot(TM) Server VM/1.8.0_191/25.191-b12]
 7 [2019-10-09T22:44:57,945][INFO ][o.e.n.Node               ] JVM arguments [-Xms512m, -Xmx512m, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -XX:+DisableExplicitGC, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -Djdk.io.permissionsUseCanonicalPath=true, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Dlog4j.skipJansi=true, -XX:+HeapDumpOnOutOfMemoryError, -Des.path.home=/home/hadoop/soft/elasticsearch-5.4.3]
 8 [2019-10-09T22:45:01,169][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [aggs-matrix-stats]
 9 [2019-10-09T22:45:01,180][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [ingest-common]
10 [2019-10-09T22:45:01,180][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-expression]
11 [2019-10-09T22:45:01,180][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-groovy]
12 [2019-10-09T22:45:01,180][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-mustache]
13 [2019-10-09T22:45:01,181][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-painless]
14 [2019-10-09T22:45:01,181][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [percolator]
15 [2019-10-09T22:45:01,181][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [reindex]
16 [2019-10-09T22:45:01,181][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [transport-netty3]
17 [2019-10-09T22:45:01,181][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [transport-netty4]
18 [2019-10-09T22:45:01,182][INFO ][o.e.p.PluginsService     ] [rYUCm8s] no plugins loaded
19 [2019-10-09T22:45:05,825][INFO ][o.e.d.DiscoveryModule    ] [rYUCm8s] using discovery type [zen]
20 [2019-10-09T22:45:06,893][INFO ][o.e.n.Node               ] initialized
21 [2019-10-09T22:45:06,894][INFO ][o.e.n.Node               ] [rYUCm8s] starting ...
22 [2019-10-09T22:45:07,126][INFO ][o.e.t.TransportService   ] [rYUCm8s] publish_address {127.0.0.1:9300}, bound_addresses {[::1]:9300}, {127.0.0.1:9300}
23 [2019-10-09T22:45:07,143][WARN ][o.e.b.BootstrapChecks    ] [rYUCm8s] max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
24 [2019-10-09T22:45:07,143][WARN ][o.e.b.BootstrapChecks    ] [rYUCm8s] max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
25 [2019-10-09T22:45:10,263][INFO ][o.e.c.s.ClusterService   ] [rYUCm8s] new_master {rYUCm8s}{rYUCm8sMRzaXu84zRj3duQ}{2aE_CPSiTZqCbaR6IU4B2g}{127.0.0.1}{127.0.0.1:9300}, reason: zen-disco-elected-as-master ([0] nodes joined)
26 [2019-10-09T22:45:10,333][INFO ][o.e.g.GatewayService     ] [rYUCm8s] recovered [0] indices into cluster_state
27 [2019-10-09T22:45:10,351][INFO ][o.e.h.n.Netty4HttpServerTransport] [rYUCm8s] publish_address {127.0.0.1:9200}, bound_addresses {[::1]:9200}, {127.0.0.1:9200}
28 [2019-10-09T22:45:10,394][INFO ][o.e.n.Node               ] [rYUCm8s] started

elasticsearch在后台启动如下所示，可以使用命令查看启动进程信息。

1 [elsearch@slaver4 elasticsearch-5.4.3]$ ./bin/elasticsearch -d
2 [elsearch@slaver4 elasticsearch-5.4.3]$ ps -aux | grep elasticsearch
3 elsearch  12529 83.5 62.9 923084 627032 pts/2   Sl   22:57   0:11 /usr/local/soft/jdk1.8.0_191/bin/java -Xms512m -Xmx512m -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -server -Xss1m -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djna.nosys=true -Djdk.io.permissionsUseCanonicalPath=true -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -Dlog4j.skipJansi=true -XX:+HeapDumpOnOutOfMemoryError -Des.path.home=/home/hadoop/soft/elasticsearch-5.4.3 -cp /home/hadoop/soft/elasticsearch-5.4.3/lib/* org.elasticsearch.bootstrap.Elasticsearch -d
4 elsearch  12571  0.0  0.0 112708   992 pts/2    R+   22:57   0:00 grep --color=auto elasticsearch
5 [elsearch@slaver4 elasticsearch-5.4.3]$

使用curl localhost:9200可以看到访问成功了。也说明你的ElasticSearch启动成功了。

 1 [elsearch@slaver4 elasticsearch-5.4.3]$ curl localhost:9200
 2 {
 3   "name" : "rYUCm8s",
 4   "cluster_name" : "elasticsearch",
 5   "cluster_uuid" : "-VfRdnF3Syad_6QMsa7v3A",
 6   "version" : {
 7     "number" : "5.4.3",
 8     "build_hash" : "eed30a8",
 9     "build_date" : "2017-06-22T00:34:03.743Z",
10     "build_snapshot" : false,
11     "lucene_version" : "6.5.1"
12   },
13   "tagline" : "You Know, for Search"
14 }

外网访问，在防火墙开启9200端口命令。或者直接禁掉防火墙，如果本地学习的话。外网还无法访问的话就需要改下配置文件了。

1 [elsearch@slaver4 elasticsearch-5.4.3]$ ls
2 bin  config  data  hs_err_pid11491.log  lib  LICENSE.txt  logs  modules  NOTICE.txt  plugins  README.textile
3 [elsearch@slaver4 elasticsearch-5.4.3]$ cd config/
4 [elsearch@slaver4 config]$ ls
5 elasticsearch.yml  jvm.options  log4j2.properties  scripts
6 [elsearch@slaver4 config]$ vim elasticsearch.yml

在配置文件，vim elasticsearch.yml，添加如下所示内容即可。

1 network.host: 0.0.0.0

再次启动报了如下所示的错误：

下面使用红色标记起来的就是错误。

 1 [elsearch@slaver4 bin]$ ./elasticsearch
 2 [2019-10-10T10:14:14,226][INFO ][o.e.n.Node               ] [] initializing ...
 3 [2019-10-10T10:14:14,371][INFO ][o.e.e.NodeEnvironment    ] [rYUCm8s] using [1] data paths, mounts [[/ (rootfs)]], net usable_space [10.9gb], net total_space [17.7gb], spins? [unknown], types [rootfs]
 4 [2019-10-10T10:14:14,372][INFO ][o.e.e.NodeEnvironment    ] [rYUCm8s] heap size [505.6mb], compressed ordinary object pointers [unknown]
 5 [2019-10-10T10:14:14,373][INFO ][o.e.n.Node               ] node name [rYUCm8s] derived from node ID [rYUCm8sMRzaXu84zRj3duQ]; set [node.name] to override
 6 [2019-10-10T10:14:14,373][INFO ][o.e.n.Node               ] version[5.4.3], pid[14069], build[eed30a8/2017-06-22T00:34:03.743Z], OS[Linux/3.10.0-957.el7.x86_64/i386], JVM[Oracle Corporation/Java HotSpot(TM) Server VM/1.8.0_191/25.191-b12]
 7 [2019-10-10T10:14:14,374][INFO ][o.e.n.Node               ] JVM arguments [-Xms512m, -Xmx512m, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -XX:+DisableExplicitGC, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -Djdk.io.permissionsUseCanonicalPath=true, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Dlog4j.skipJansi=true, -XX:+HeapDumpOnOutOfMemoryError, -Des.path.home=/home/hadoop/soft/elasticsearch-5.4.3]
 8 [2019-10-10T10:14:17,064][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [aggs-matrix-stats]
 9 [2019-10-10T10:14:17,064][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [ingest-common]
10 [2019-10-10T10:14:17,065][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-expression]
11 [2019-10-10T10:14:17,065][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-groovy]
12 [2019-10-10T10:14:17,065][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-mustache]
13 [2019-10-10T10:14:17,065][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [lang-painless]
14 [2019-10-10T10:14:17,065][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [percolator]
15 [2019-10-10T10:14:17,066][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [reindex]
16 [2019-10-10T10:14:17,066][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [transport-netty3]
17 [2019-10-10T10:14:17,066][INFO ][o.e.p.PluginsService     ] [rYUCm8s] loaded module [transport-netty4]
18 [2019-10-10T10:14:17,067][INFO ][o.e.p.PluginsService     ] [rYUCm8s] no plugins loaded
19 [2019-10-10T10:14:21,970][INFO ][o.e.d.DiscoveryModule    ] [rYUCm8s] using discovery type [zen]
20 [2019-10-10T10:14:23,169][INFO ][o.e.n.Node               ] initialized
21 [2019-10-10T10:14:23,169][INFO ][o.e.n.Node               ] [rYUCm8s] starting ...
22 [2019-10-10T10:14:23,666][INFO ][o.e.t.TransportService   ] [rYUCm8s] publish_address {192.168.110.133:9300}, bound_addresses {[::]:9300}
23 [2019-10-10T10:14:23,684][INFO ][o.e.b.BootstrapChecks    ] [rYUCm8s] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks
24 ERROR: [2] bootstrap checks failed
25 [1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
26 [2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
27 [2019-10-10T10:14:23,697][INFO ][o.e.n.Node               ] [rYUCm8s] stopping ...
28 [2019-10-10T10:14:23,736][INFO ][o.e.n.Node               ] [rYUCm8s] stopped
29 [2019-10-10T10:14:23,736][INFO ][o.e.n.Node               ] [rYUCm8s] closing ...
30 [2019-10-10T10:14:23,765][INFO ][o.e.n.Node               ] [rYUCm8s] closed
31 [elsearch@slaver4 bin]$ 

上面的两个错误解决方法如下所示：

错误一，[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]。解决方法如下所示：

错误原因，每个进程最大同时打开文件数太小，可通过下面2个命令查看当前数量。

注意，切记，如果按照此方法修改，必须重启你的虚拟机，而且是root用户修改的配置文件，不然你解决完报的这两个错误，再次启动elasticsearch还是会报错误一，但是不会报错误二，所以重启虚拟机以后解决这两个错误。

1 [root@slaver4 ~]# vim /etc/security/limits.conf

添加如下所示内容：

注意：解释如是，*是代表任何用户，此配置的意思是任何用户都可以打开文件的数量。

1 *               soft    nofile          65536
2 *               hard    nofile          65536

操作如下所示：

错误二，max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]。

错误原因，应该是虚拟内存不足导致的错误。修改/etc/sysctl.conf文件，增加配置vm.max_map_count=262144。执行命令sysctl -p生效。

1 [root@slaver4 ~]# vim /etc/sysctl.conf
2 [root@slaver4 ~]# sysctl -p
3 vm.max_map_count = 262144
4 [root@slaver4 ~]# 

添加内容如下所示：

1 vm.max_map_count=262144

操作如下所示：

解决完上述两个错误以后，使用浏览器访问也出现了正常，如下所示：

使用命令行，访问出现如下所示表示正常启动elasticsearch。

如何停止你的elasticsearch呢，如下所示：

方式一，如果是前台启动方式，即进入/home/hadoop/soft/elasticsearch-5.4.3/bin/目录直接使用./elasticsearch启动，直接ctrl+c就可以退出了elasticsearch。

方式二，如果是后台启动elasticsearch的话。./elasticsearch -d。这种后台方式启动。使用jps命令查看进程号，然后使用kill -9 进程号。直接强制杀死的命令。

4、ElasticSearch的实用插件Head的安装。

　　通过浏览器访问http://192.168.110.133:9200/。返回的是json格式的数据，显示效果不是很友好的，通过Head插件提供的友好的web界面，解决了界面显示的问题。同时Head插件还实现了基本信息的查看，rest请求的模拟，以及数据的基本检索。

使用命令下载elasticsearch head插件，wget https://github.com/mobz/elasticsearch-head/archive/master.zip。

或者使用这种方式安装elasticsearch-head插件。

1 [elsearch@slaver4 package]$ yum install –y git
2 [elsearch@slaver4 package]$ git clone https://github.com/mobz/elasticsearch-head.git

我是使用wget下载zip包，直接解压缩操作，安装的elasticearch-head插件。

 1 [root@slaver4 ~]# cd /home/hadoop/package/
 2 [root@slaver4 package]# ls
 3 elasticsearch-5.4.3.tar.gz           erlang-18.3-1.el7.centos.x86_64.rpm  haproxy-1.6.5.tar.gz      phantomjs-2.1.1-linux-x86_64.tar.bz2        rabbitmq-server-3.6.5-1.noarch.rpm
 4 elasticsearch-analysis-ik-5.4.3.zip  es-sql-site-standalone.zip           keepalived-1.2.18.tar.gz  rabbitmq_delayed_message_exchange-0.0.1.ez  socat-1.7.3.2-1.1.el7.x86_64.rpm
 5 [root@slaver4 package]# wget https://github.com/mobz/elasticsearch-head/archive/master.zip
 6 --2019-10-10 14:49:21--  https://github.com/mobz/elasticsearch-head/archive/master.zip
 7 Resolving github.com (github.com)... 13.229.188.59
 8 Connecting to github.com (github.com)|13.229.188.59|:443... connected.
 9 HTTP request sent, awaiting response... 302 Found
10 Location: https://codeload.github.com/mobz/elasticsearch-head/zip/master [following]
11 --2019-10-10 14:49:22--  https://codeload.github.com/mobz/elasticsearch-head/zip/master
12 Resolving codeload.github.com (codeload.github.com)... 13.250.162.133
13 Connecting to codeload.github.com (codeload.github.com)|13.250.162.133|:443... connected.
14 HTTP request sent, awaiting response... 200 OK
15 Length: 1353444 (1.3M) [application/zip]
16 Saving to: ‘master.zip’
17 
18 100%[=======================================================================================================================================================================>] 1,353,444    139KB/s   in 10s    
19 
20 2019-10-10 14:49:34 (126 KB/s) - ‘master.zip’ saved [1353444/1353444]
21 
22 [root@slaver4 package]# ls
23 elasticsearch-5.4.3.tar.gz           es-sql-site-standalone.zip  master.zip                                  rabbitmq-server-3.6.5-1.noarch.rpm
24 elasticsearch-analysis-ik-5.4.3.zip  haproxy-1.6.5.tar.gz        phantomjs-2.1.1-linux-x86_64.tar.bz2        socat-1.7.3.2-1.1.el7.x86_64.rpm
25 erlang-18.3-1.el7.centos.x86_64.rpm  keepalived-1.2.18.tar.gz    rabbitmq_delayed_message_exchange-0.0.1.ez
26 [root@slaver4 package]# 

下载好进行解压缩操作，如下所示：

1 [root@slaver4 package]# unzip master.zip

由于head插件本质上还是一个nodejs的工程，因此需要安装node，使用npm来安装依赖的包。

下载安装node，wget https://nodejs.org/dist/latest-v8.x/node-v8.16.2-linux-x64.tar.xz，下载完毕进行解压缩操作。

 1 [root@slaver4 package]# wget https://nodejs.org/dist/latest-v8.x/node-v8.16.2-linux-x64.tar.xz
 2 [root@slaver4 package]# ls
 3 elasticsearch-5.4.3.tar.gz           es-sql-site-standalone.zip  master.zip                            rabbitmq_delayed_message_exchange-0.0.1.ez
 4 elasticsearch-analysis-ik-5.4.3.zip  haproxy-1.6.5.tar.gz        node-v8.16.2-linux-x64.tar.xz         rabbitmq-server-3.6.5-1.noarch.rpm
 5 erlang-18.3-1.el7.centos.x86_64.rpm  keepalived-1.2.18.tar.gz    phantomjs-2.1.1-linux-x86_64.tar.bz2  socat-1.7.3.2-1.1.el7.x86_64.rpm
 6 [root@slaver4 package]#
 7 [root@slaver4 package]# tar -zxvf node-v8.16.2-linux-x64.tar.xz -C /home/hadoop/soft/
 8 [root@slaver4 package]# cd ../soft/
 9 [root@slaver4 soft]# ls
10 elasticsearch-5.4.3  elasticsearch-head-master  node-v8.16.2-linux-x64
11 [root@slaver4 soft]#

解压缩完毕，进行配置环境变量。添加完Node环境变量以后刷新配置文件source /etc/profile。

1 [root@slaver4 soft]# vim /etc/profile
2 [root@slaver4 soft]# source /etc/profile

配置如下所示：

1 export NODE_HOME=/home/hadoop/soft/node-v8.16.2-linux-x64
2 export PATH=$PATH:$NODE_HOME/bin

然后进行查看Node版本验证。如下所示：

注意：Node的版本必须大于等于node6.0版本。

1 [root@slaver4 soft]# node -v
2 v8.16.2
3 [root@slaver4 soft]# npm -v
4 6.4.1
5 [root@slaver4 soft]#

执行一下npm，npm是Node的一个包安装工具。

 1 [root@slaver4 soft]# ls
 2 elasticsearch-5.4.3  elasticsearch-head-master  node-v8.16.2-linux-x64
 3 [root@slaver4 soft]# cd elasticsearch-head-master/
 4 [root@slaver4 elasticsearch-head-master]# ls
 5 crx                elasticsearch-head.sublime-project  index.html    plugin-descriptor.properties  _site
 6 Dockerfile         Gruntfile.js                        LICENCE       proxy                         src
 7 Dockerfile-alpine  grunt_fileSets.js                   package.json  README.textile                test
 8 [root@slaver4 elasticsearch-head-master]# np
 9 npm    nproc  npx    
10 [root@slaver4 elasticsearch-head-master]# npm install

执行npm install报了如下所示的错误，真是坎坷万千啊。

 1 [root@slaver4 elasticsearch-head-master]# npm install
 2 npm WARN deprecated [email protected]: CoffeeScript on NPM has moved to "coffeescript" (no hyphen)
 3 npm WARN deprecated [email protected]: Use the built-in module in node 9.0.0 or newer, instead
 4 npm WARN deprecated [email protected]: this package is now deprecated
 5 npm WARN deprecated [email protected]: Please use the native JSON object instead of JSON 3
 6 npm WARN deprecated [email protected]: Please use the native JSON object instead of JSON 3
 7 
 8 > [email protected] install /home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt
 9 > node install.js
10 
11 PhantomJS not found on PATH
12 Downloading https://github.com/Medium/phantomjs/releases/download/v2.1.1/phantomjs-2.1.1-linux-x86_64.tar.bz2
13 Saving to /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2
14 Receiving...
15   [========================================] 99%
16 Received 22866K total.
17 Extracting tar contents (via spawned process)
18 Removing /home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt/lib/phantom
19 Copying extracted folder /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2-extract-1570691935036/phantomjs-2.1.1-linux-x86_64 -> /home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt/lib/phantom
20 Phantom installation failed { Error: EACCES: permission denied, link '/tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2-extract-1570691935036/phantomjs-2.1.1-linux-x86_64' -> '/home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt/lib/phantom'
21   errno: -13,
22   code: 'EACCES',
23   syscall: 'link',
24   path: '/tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2-extract-1570691935036/phantomjs-2.1.1-linux-x86_64',
25   dest: '/home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt/lib/phantom' } Error: EACCES: permission denied, link '/tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2-extract-1570691935036/phantomjs-2.1.1-linux-x86_64' -> '/home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt/lib/phantom'
26 npm WARN [email protected] license should be a valid SPDX license expression
27 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/fsevents):
28 npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
29 
30 npm ERR! code ELIFECYCLE
31 npm ERR! errno 1
32 npm ERR! [email protected] install: `node install.js`
33 npm ERR! Exit status 1
34 npm ERR! 
35 npm ERR! Failed at the [email protected] install script.
36 npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
37 
38 npm ERR! A complete log of this run can be found in:
39 npm ERR!     /root/.npm/_logs/2019-10-10T07_18_58_885Z-debug.log

应该是缺少类库，使用如下所示的命令npm install phantomjs-prebuilt -save进行安装。

 1 [elsearch@slaver4 elasticsearch-head-master]$ npm install phantomjs-prebuilt -save
 2 npm WARN deprecated [email protected]: this package is now deprecated
 3 
 4 > [email protected] install /home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt
 5 > node install.js
 6 
 7 PhantomJS not found on PATH
 8 Download already available at /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2
 9 Verified checksum of previously downloaded file
10 Extracting tar contents (via spawned process)
11 Removing /home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt/lib/phantom
12 Copying extracted folder /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2-extract-1570692541363/phantomjs-2.1.1-linux-x86_64 -> /home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt/lib/phantom
13 Writing location.js file
14 Done. Phantomjs binary available at /home/hadoop/soft/elasticsearch-head-master/node_modules/phantomjs-prebuilt/lib/phantom/bin/phantomjs
15 npm notice created a lockfile as package-lock.json. You should commit this file.
16 npm WARN [email protected] license should be a valid SPDX license expression
17 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/fsevents):
18 npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
19 
20 + [email protected]
21 added 62 packages from 64 contributors, removed 4 packages and audited 1734 packages in 137.541s
22 found 37 vulnerabilities (18 low, 2 moderate, 17 high)
23   run `npm audit fix` to fix them, or `npm audit` for details
24 [elsearch@slaver4 elasticsearch-head-master]$ 

安装完成以后，运行一下，使用如下命令npm run start，如下所示：

 1 [elsearch@slaver4 elasticsearch-head-master]$ npm run start
 2 
 3 > [email protected] start /home/hadoop/soft/elasticsearch-head-master
 4 > grunt server
 5 
 6 >> Local Npm module "grunt-contrib-jasmine" not found. Is it installed?
 7 
 8 Running "connect:server" (connect) task
 9 Waiting forever...
10 Started connect web server on http://localhost:9100

可以看到head插件默认占用9100端口，浏览器访问http://192.168.110.133:9100/，如下所示。即可显示head插件界面。

由于elasticsearch和elasticsearch-head插件是属于两个不同的进程的，他们之间的访问是存在跨域问题的。

1 [root@slaver4 ~]# cd /home/hadoop/soft/elasticsearch-
2 -bash: cd: /home/hadoop/soft/elasticsearch-: No such file or directory
3 [root@slaver4 ~]# cd /home/hadoop/soft/elasticsearch-
4 elasticsearch-5.4.3/       elasticsearch-head-master/ 
5 [root@slaver4 ~]# cd /home/hadoop/soft/elasticsearch-5.4.3/
6 [root@slaver4 elasticsearch-5.4.3]# ls
7 bin  config  data  hs_err_pid11491.log  lib  LICENSE.txt  logs  modules  NOTICE.txt  plugins  README.textile
8 [root@slaver4 elasticsearch-5.4.3]# vim config/elasticsearch.yml

在/home/hadoop/soft/elasticsearch-5.4.3/config/elasticsearch.yml配置文件中添加如下所示配置。解决跨域访问的问题、支持所有的域名。

1 # 是否支持跨域
2 http.cors.enabled: true
3 #
4 # *表示支持所有域名
5 http.cors.allow-origin: "*"

此时，后台启动elasticsearch（切记，使用自己创建的用户，不能使用root用户哦，./elasticsearch -d），启动elasticsearch-head插件（切记，使用自己创建的用户，npm run start）。

通过head插件连接elasticsearch服务。输入elasticsearch服务地址http://192.168.110.133:9200/，点击连接，右边显示黄色信息说明连接成功，至此elasticsearch-head插件安装成功。

注意：green绿色代表集群健康，正常运行。yellow黄色代表集群健康不是很好，但是集群可以使用。red红色代表集群状态很差，搜索可以使用，但是可能出现丢失数据的情况。

5、安装grunt，可以使用后台启动elasticsearch-head插件（这里的操作，我是执行完以上进行的操作，目的是为了后台可以启动head插件的），操作如下所示：

安装grunt，如下所示：

[elsearch@slaver4 elasticsearch-head-master]$ cd elasticsearch-head-master
[elsearch@slaver4 elasticsearch-head-master]$ npm install -g grunt --registry=https://registry.npm.taobao.org

注意：在elasticsearch-head目录下node_modules/grunt下如果没有grunt二进制程序，需要执行：

[elsearch@slaver4 elasticsearch-head-master]$ cd elasticsearch-head-master
[elsearch@slaver4 elasticsearch-head-master]$ npm install grunt --save

 1 [elsearch@slaver4 soft]$ cd elasticsearch-head-master/
 2 [elsearch@slaver4 elasticsearch-head-master]$ ls
 3 crx         Dockerfile-alpine                   Gruntfile.js       index.html  node_modules  package-lock.json             proxy           _site  test
 4 Dockerfile  elasticsearch-head.sublime-project  grunt_fileSets.js  LICENCE     package.json  plugin-descriptor.properties  README.textile  src
 5 [elsearch@slaver4 elasticsearch-head-master]$ clear
 6 [elsearch@slaver4 elasticsearch-head-master]$ ls
 7 crx         Dockerfile-alpine                   Gruntfile.js       index.html  node_modules  package-lock.json             proxy           _site  test
 8 Dockerfile  elasticsearch-head.sublime-project  grunt_fileSets.js  LICENCE     package.json  plugin-descriptor.properties  README.textile  src
 9 [elsearch@slaver4 elasticsearch-head-master]$ npm install -g grunt --registry=https://registry.npm.taobao.org
10 /home/hadoop/soft/node-v8.16.2-linux-x64/bin/grunt -> /home/hadoop/soft/node-v8.16.2-linux-x64/lib/node_modules/grunt/bin/grunt
11 + [email protected]
12 added 97 packages from 63 contributors in 10.985s
13 [elsearch@slaver4 elasticsearch-head-master]$ npm install grunt --save
14 npm WARN deprecated [email protected]: CoffeeScript on NPM has moved to "coffeescript" (no hyphen)
15 npm WARN [email protected] license should be a valid SPDX license expression
16 npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules/fsevents):
17 npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
18 
19 + [email protected]
20 updated 1 package and audited 1734 packages in 88.081s
21 found 37 vulnerabilities (18 low, 2 moderate, 17 high)
22   run `npm audit fix` to fix them, or `npm audit` for details

下面的配置可以修改也可以不修改的，我这里修改了。

修改elasticsearch-head下Gruntfile.js文件，默认监听在127.0.0.1下9200端口：

添加hostname: '192.168.110.133',这个配置。

 1 connect: {
 2         server: {
 3                 options: {
 4                         hostname: '192.168.110.133',
 5                         port: 9100,
 6                         base: '.',
 7                         keepalive: true
 8                 }
 9         }
10 }

修改 _site/app.js，修改http://localhost:9200字段到本机ES端口与IP：

在命令模式，即可以使用:/localhost搜索找到localhost，然后修改如下配置。显示行号，也是在命令模式，使用:set nu既可以显示行号。

1 将此配置
2 "http://localhost:9200";
3 
4 修改为了
5 "http://192.168.110.133:9200";

Vim的三种工作模式。

后台启动elasticsearch-head插件，如下所示：

在/home/hadoop/soft/elasticsearch-head-master/node_modules/grunt/bin目录下面，使用此命令后台启动。./grunt server &

 1 [elsearch@slaver4 elasticsearch-head-master]$ ls
 2 crx                elasticsearch-head.sublime-project  index.html    package.json                  proxy           src
 3 Dockerfile         Gruntfile.js                        LICENCE       package-lock.json             README.textile  test
 4 Dockerfile-alpine  grunt_fileSets.js                   node_modules  plugin-descriptor.properties  _site
 5 [elsearch@slaver4 elasticsearch-head-master]$ cd node_modules/gr
 6 graceful-fs/            grunt-contrib-concat/   grunt-contrib-watch/    grunt-legacy-log/       
 7 grunt/                  grunt-contrib-connect/  grunt-karma/            grunt-legacy-log-utils/ 
 8 grunt-contrib-clean/    grunt-contrib-copy/     grunt-known-options/    grunt-legacy-util/      
 9 [elsearch@slaver4 elasticsearch-head-master]$ cd node_modules/grunt/bin/
10 [elsearch@slaver4 bin]$ ls
11 grunt
12 [elsearch@slaver4 bin]$ ./grunt server &
13 [1] 10709
14 [elsearch@slaver4 bin]$ >> Local Npm module "grunt-contrib-jasmine" not found. Is it installed?
15 
16 Running "connect:server" (connect) task
17 Waiting forever...
18 Started connect web server on http://192.168.110.133:9100

作者：别先生

博客园：https://www.cnblogs.com/biehongli/

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