首先确保ElasticSearch镜像已经启动
docker exec -it elasticsearch /bin/bash
./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.5.4/elasticsearch-analysis-ik-6.5.4.zip
进入plugins可以看到IK分词器已经安装成功
exit
docker restart elasticsearch
测试
docker 安装ElasticSearch的中文分词器IK
原文：https://www.cnblogs.com/szwdun/p/10664348.html