1.系统环境：
# uname -a
Linux Rocky 4.18.0-348.7.1.el8_5.x86_64 #1 SMP Tue Dec 21 19:02:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
# lsb_release -a
Distributor ID: Rocky
Description: Rocky Linux release 8.5 (Green Obsidian)
Release: 8.5
Codename: GreenObsidian
# docker version
Version: 20.10.12
2.创建私有镜像库：
# ip addr
192.168.225.136 // 服务器端IP
# docker pull registry
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
registry latest 2e200967d166 4 weeks ago 24.2MB
# docker run -d -p 5000:5000 --restart always --name registry registry:latest
3.客户端环境配置：
# ip addr
192.168.225.130
# telnet 192.168.225.136 5000 // 显示如下信息表示可以访问服务器端5000端口
Trying 192.168.225.136...
Connected to 192.168.225.136.
Escape character is '^]'.
# systemctl stop docker
# cd /etc/docker
# vim daemon.json // 该文件不存在需要手动创建
添加如下内容，保存退出
{ "insecure-registries":["192.168.225.136:5000"] }
# cd /usr/lib/systemd/system
# vim docker.service // 建议编辑前备份该文件
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock //在该行下面添加下面一行
EnvironmentFile=-/etc/docker/daemon.json
# systemctl daemon-reload
# systemctl start docker
4.客户端上传镜像：
（1）.上传dockerfile生成镜像：
# build -t 192.168.225.136:5000/nginx-server ./
# docker push 192.168.225.136:5000/nginx-server
（2）.上传本地镜像
# docker tag nginx:latest 192.168.225.136:5000/nginx-server
# docker push 192.168.225.136:5000/nginx-server
5.查看私有镜像服务器有哪些镜像：
# curl http://192.168.225.136:5000/v2/_catalog
{"repositories":["nginx-server"]}
6.从镜像服务器拉去镜像：
# docker pull 192.168.225.136:5000/nginx-server