安装ik分词插件

git clone https://github.com/medcl/elasticsearch-analysis-ik
git checkout tags/v5.2.0 #切换到对应的版本
mvn package

建立相应的ik分词插件目录

mkdir /usr/local/es/elasticsearch-5.2.0/plugins/ik

复制压缩包到目录下

cp target/releases/elasticsearch-analysis-ik-5.2.0.zip /usr/local/es/elasticsearch-5.2.0/plugins/ik
unzip elasticsearch-analysis-ik-5.2.0.zip

解压重启即可