1、安装

先要安装java1.8或以上版本

yum install java

java -version查看版本

安装：Elasticsearch-RTF：

https://github.com/medcl/elasticsearch-rtf

git clone git://github.com/medcl/elasticsearch-rtf.git -b master --depth 1

[root@localhost soft]# cd elasticsearch-rtf/

[root@localhost elasticsearch-rtf]# pwd

/share/soft/elasticsearch-rtf

[root@localhost elasticsearch-rtf]# bin/elasticsearch-plugin list

analysis-icu

analysis-ik

analysis-kuromoji

analysis-mmseg

analysis-phonetic

analysis-pinyin

analysis-smartcn

analysis-stconvert

analysis-stempel

analysis-ukrainian

discovery-azure-classic

discovery-ec2

discovery-file

discovery-gce

elasticsearch-sql

ingest-attachment

ingest-geoip

ingest-user-agent

lang-javascript

lang-python

mapper-attachments

mapper-murmur3

mapper-size

repository-azure

repository-gcs

repository-hdfs

repository-s3

store-smb

卸载不需要的插件：

这样做是为了防止占内存，我们这里只用到analysis-ik

[root@localhost elasticsearch-rtf]# bin/elasticsearch-plugin list > /tmp/plugin.log

[root@localhost elasticsearch-rtf]# vi /tmp/plugin.log 

将analysis-ik删除后保存

[root@localhost elasticsearch-rtf]# cat /tmp/plugin.log |xargs -I {} bin/elasticsearch-plugin remove {}

然后查看余下的插件列表：

[root@localhost elasticsearch-rtf]# bin/elasticsearch list

如果报以下错误：

OpenJDK 64-Bit Server VM warning: If the number of processors is expected to increase from one, then you should configure the number of parallel GC threads appropriately using -XX:ParallelGCThreads=N

解决办法：

修改elasticsearch-rtf/configjvm.options

vi /etc/elasticsearch/jvm.options

## GC configuration

再上这一句，因为是机器内存比较小，官方建议最少2G，我这1G勉强能跑起来；

-XX:ParallelGCThreads=1

另外elasticsearch不允许以root用户启动，按如下操作新建用户、组，并切换用户后启动：

groupadd elsearch

useradd elsearch -g elsearch -p elasticsearch

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

[root@localhost soft]# ll

总用量 335032

drwxrwxrwx 1 root root      4096 6月   5 13:25 elasticsearch-rtf

chown -R elsearch:elsearch  elasticsearch-rtf（你的目录名）

切换到elsearch用户再启动

su elsearch #切换账户

cd elasticsearch/bin #进入你的elasticsearch目录下的bin目录

./elasticsearch -d