docker 查询或获取私有仓库(registry)中的镜像，使用
docker search 192.168.1.8:5000
命令经测试不好使。
解决：
1、获取仓库类的镜像：
[root@shanghai docker]# curl -XGET http://192.168.1.8:5000/v2/_catalog
{"repositories":["nginx"]}
2、获取某个镜像的标签列表：
[root@shanghai docker]# curl -XGET http://192.168.1.8:5000/v2/image_name/tags/list
{"errors":[{"code":"NAME_UNKNOWN","message":"repositoryname not known toregistry","detail":{"name":"image_name"}}]}
[root@shanghai docker]# curl -XGET http://192.168.1.8:5000/v2/nginx/tags/list
{"name":"nginx","tags":["latest"]}
[root@shanghai docker]#
参考：
https://stackoverflow.com/questions/23733678/how-to-search-images-from-private-1-0-registry-in-docker