1、私仓搭建

docker pull registry#拉取镜像
docker images#查看镜像

mkdir -p /czx/myregistry 创建挂载目录

运行私有库registry (相当于本地有个是有docker hub)
docker run -d -p 5000:5000 -v /czx/myregistry/:/tmp/registry --restart=always --privileged=true registry 

root@ubt:/# docker pull registry
Using default tag: latest
latest: Pulling from library/registry
619be1103602: Pull complete 
862815ae87dc: Pull complete 
74e12953df95: Pull complete 
6f0ce73649a0: Pull complete 
ef4f267ce8ed: Pull complete 
Digest: sha256:4fac7a8257b1d7a86599043fcc181dfbdf9c8f57e337db763ac94b0e67c6cfb5
Status: Downloaded newer image for registry:latest
docker.io/library/registry:latest
root@ubt:/# mkdir -p /czx/myregistry
root@ubt:/# docker run -d -p 5000:5000 -v /czx/myregistry/:/tmp/registry --restart=always --privileged=true registry
68ffc60315f3b91020b30c0dfca353226fb669d047ec11640b98bddd18aae945
root@ubt:/# docker ps
CONTAINER ID   IMAGE                COMMAND                  CREATED         STATUS        PORTS                                                                   NAMES
68ffc60315f3   registry             "/entrypoint.sh /etc…"   3 seconds ago   Up 1 second   0.0.0.0:5000->5000/tcp, :::5000->5000/tcp                               admiring_varahamihira

curl -XGET http://自己的ip:5000/v2/_catalog

私仓搭建完成

2、打包并上传

这里把本地的nginx镜像打包，docker tag nginx 自己的ip:5000/nginx:1.0

查看镜像是否打包成功 docker images

尝试上传镜像至私有仓库 docker push 自己的ip:5000/nginx  

报错Get "https://1.94.143.44:5000/v2/": http: server gave HTTP response to HTTPS client

需要修改daemon.json文件

root@ubt:/# vi /etc/docker/daemon.json

重启docker服务，systemctl restart docker 

并启动registry，docker start  [registry容器的id]

增加一行 "insecure-registries" : ["自己的ip:5000"]

再次上传，成功

3、下载镜像

这里在另外一台服务器下载此镜像

root@hcss-ecs-ed4e:/# docker pull 私有仓库ip:5000/nginx

注意这里也要配置daemon.json文件

可以参考Docker之将本地镜像推送到私有库_docker push 到私有仓库-CSDN博客

另外还可以配置仓库账号密码 参考 https://www.cnblogs.com/nulige/articles/10926088.html