我在下面的一个docker标记的例子中看到了。

docker build -t example.com:80/hw-go:1.2 .

我不明白的是为什么这里使用“example.com：80”而不是“user-name”作为常规约定。

docker build -t <user-name>/<image-name>:<tag-name>

使用示例URL和端口而不是用户名的任何具体原因？此图像是本地构建的，也是本地保存的。

/home/ravi> sudo docker images
REPOSITORY                                                TAG            IMAGE ID       CREATED          SIZE
example.com:80/ad                                         1.2            a285e31adfc6   30 minutes ago   736MB
registry.k8s.io/sig-storage/nfs-provisioner               v4.0.8         fd0b16f70b66   12 days ago      236MB
nexus3.o-ran-sc.org:10002/o-ran-sc/ric-plt-a1             3.0.1          49090bccc5e6   3 months ago     140MB

docker信息输出

/home/ravi/#docker info
Client:
 Context:    default
 Debug Mode: false

Server:
 Containers: 107
  Running: 52
  Paused: 0
  Stopped: 55
 Images: 47
 Server Version: 20.10.21
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: systemd
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 
 runc version: 
 init version: 
 Security Options:
  apparmor
  seccomp
   Profile: default
 Kernel Version: 5.15.0-67-generic
 Operating System: Ubuntu 20.04.5 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 4
 Total Memory: 15.63GiB
 Name: ubuntu-temp
 ID: GXHN:P4BG:HMYJ:4PTJ:LIMA:MOE2:ECRL:2ZCI:YRNI:B5YH:DN3U:JPK4
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

谢谢