插件能额外扩展elasticsearch功能，提供各类功能等等。有三种类型的插件：
- java插件
只包含JAR文件，必须在集群中每个节点上安装而且需要重启才能使插件生效。 - 网站插件
这类插件包含静态web内容，如js、css、html等等，可以直接从elasticsearch服务，如head插件。只需在一个节点上安装，不需要重启服务。可以通过下面的URL访问，如：http://node-ip:9200/_plugin/plugin_name - 混合插件
顾名思义，就是包含上面两种的插件。
插件管理
# ./bin/plugin -h
SYNOPSIS
plugin < command >
COMMANDS
install Install a plugin
remove Remove a plugin
list List installed plugins
NOTES
[ * ] For usage help on specific commands please type "plugin <command> -h"
插件安装
# ./bin/plugin install -h
NAME
install - Install a plugin
SYNOPSIS
plugin install < name or url >
DESCRIPTION
This command installs an elasticsearch plugin . It can be used as follows :
Officially supported or commercial plugins require just the plugin name :
plugin install analysis - icu
plugin install shield
Plugins from GitHub require 'username/repository' or 'username/repository/version' :
plugin install lmenezes / elasticsearch - kopf
plugin install lmenezes / elasticsearch - kopf / 1.5.7
Plugins from Maven Central or Sonatype require 'groupId/artifactId/version' :
plugin install org . elasticsearch / elasticsearch - mapper - attachments / 2.6.0
Plugins can be installed from a custom URL or file location as follows :
plugin install http : //some.domain.name//my-plugin-1.0.0.zip
plugin install file : / path / to / my - plugin - 1.0.0.zip
OFFICIAL PLUGINS
The following plugins are officially supported and can be installed by just referring to their name
- analysis - icu
- analysis - kuromoji
- analysis - phonetic
- analysis - smartcn
- analysis - stempel
- cloud - aws
- cloud - azure
- cloud - gce
- delete - by - query
- discovery - multicast
- lang - javascript
- lang - python
- mapper - murmur3
- mapper - size
OPTIONS
- t , -- timeout Timeout until the plugin download is abort
- v , -- verbose Verbose output
- h , -- help Shows this message
安装head插件
bin / plugin install mobz / elasticsearch - head
安装中文分词插件ik，请参加之前的文章。
安装Marvel插件
# bin/plugin install license
# bin/plugin install marvel-agent
这个插件已经集成到kibana上了，kibana内容后续再说，还需要在kibana上安装Marvel插件
# bin/kibana plugin --install elasticsearch/marvel/latest
Marvel是收费的，监控工具，推荐使用。2.0版本会报NullPointerException错误，还未找到解决方法。
查看已安装的插件
# ./bin/plugin list
删除插件
# ./bin/plugin remove plugin_name
关于插件更多内容参见：https://www.elastic.co/guide/en/elasticsearch/plugins/2.0/index.html
elasticsearch的内容暂且更新这么多了，转到kibana上去了，目前这些内容够你摆弄ELK。后面再回过头来继续elasticsearch内容，如增删查改等等。
