elasticsearch ik安装
/usr/share/elasticsearch/bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v5.6.4/elasticsearch-analysis-ik-5.6.4.zip
/usr/share/elasticsearch/bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v5.6.4/elasticsearch-analysis-ik-5.6.4.zip