Docker Hub使用
注册表（registry）是存储库（repository）的集合，存储库是镜像（image）的集合，类似于github存储库，但代码已经构建
注册表上的帐户可以创建多个存储库。Docker Hub是Docker官方的注册表，可用于Docker镜像的远程存储和分发
登录
首先在Docker Hub官网上注册账户，然后在本地登录
$ docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: zjykzj
Password:
WARNING! Your password will be stored unencrypted in /home/zj/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
完成登录后会在~/.docker/config.json中保存用户名和密码
~/.docker$ cat config.json
{
"auths": {
"https://index.docker.io/v1/": {
"auth": "emxxxxxxxxxxxxxxxNg=="
}
}
下次直接docker login即可自动登录
标记
需要重新标记本地镜像，使其符合远程注册表的命名方式
$ docker tag IMAGE username/repository:tag
- 参数
IMAGE表示本地镜像名 username表示账户名repository表示仓库名tag是可选的，但可以给定一个意义的标记
比如
$ docker tag zjykzj/hello-world:latest zjykzj/hello-world:0.1.0
重新标记完成后会生成一个新的镜像名和标记，指向同一个镜像（ID相同）
$ docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
zjykzj/hello-world 0.1.0 33213d19271a 10 minutes ago 64.2MB
zjykzj/hello-world latest 33213d19271a 10 minutes ago 64.2MB
发布
上传已标记的镜像到仓库
$ docker push zjykzj/hello-world:0.1.0
The push refers to repository [docker.io/zjykzj/hello-world]
802d08069c1a: Pushed
1852b2300972: Mounted from library/ubuntu
03c9b9f537a4: Mounted from library/ubuntu
8c98131d2d1d: Mounted from library/ubuntu
cc4590d6a718: Mounted from library/ubuntu
0.1.0: digest: sha256:ae8ccd59bc2bc0ff07db5a6df98693182c27cc6c996de8033160ecdc0b8375e1 size: 1359
$ docker push zjykzj/hello-world:latest
The push refers to repository [docker.io/zjykzj/hello-world]
802d08069c1a: Layer already exists
1852b2300972: Layer already exists
03c9b9f537a4: Layer already exists
8c98131d2d1d: Layer already exists
cc4590d6a718: Layer already exists
latest: digest: sha256:ae8ccd59bc2bc0ff07db5a6df98693182c27cc6c996de8033160ecdc0b8375e1 size: 1359
完成之后即可在仓库中查看：zjykzj/hello-world
注意：latest指向0.1.0镜像，但是需要单独上传
拉取
运行镜像zjykzj/hello-world:0.1.0，如果本地不存在，则会从远程拉取
$ docker run zjykzj/hello-world:0.1.0
Unable to find image 'zjykzj/hello-world:0.1.0' locally
0.1.0: Pulling from zjykzj/hello-world
423ae2b273f4: Already exists
de83a2304fa1: Already exists
f9a83bce3af0: Already exists
b6b53be908de: Already exists
e422f68af1c3: Pull complete
Digest: sha256:ae8ccd59bc2bc0ff07db5a6df98693182c27cc6c996de8033160ecdc0b8375e1
Status: Downloaded newer image for zjykzj/hello-world:0.1.0
Hello World
注销用户
使用命令docker logout即可，此时会把配置文件中的加密用户信息删除
$ docker logout
Removing login credentials for https://index.docker.io/v1/
:~/.docker$ cat config.json
{
"auths": {},
}