docker中镜像的提交和上传

本文介绍如何将本地的镜像上传到镜像仓库。以及上传时遇到"denied: requested access to the resource is denied"的解决方法。
原文地址：代码汇个人博客 http://www.codehui.net/info/57.html

在上一篇文章中，介绍了使用docker快速搭建nginx+php环境，本文介绍如何把修改过的镜像上传至镜像仓库。我们需要先在 Docker Hub上注册一个账号。

• 查看镜像

[root@localhost ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               latest              f09fe80eb0e7        7 days ago          109MB
php                 7.1-fpm             7c5ccac5d47f        7 days ago          358MB

• 查看容器

[root@localhost ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
51adb2df6004        php:7.1-fpm         "docker-php-entrypoif"   6 hours ago         Up 6 hours          0.0.0.0:9000->9000/tcp   myphp-fpm
3218b3ad4e47        f09fe80eb0e7        "nginx -g 'daemon off"   7 hours ago         Up 7 hours          0.0.0.0:80->80/tcp       mynginx

从容器创建一个新的镜像

[root@localhost ~]# docker commit -p -a "codehui" -m "test" 3218b3ad4e47 codehi/nginx:v1
sha256:1d8fca63675ac57bccb50f0dbdb6030e384c22ee673eecdcb04c915236778109

-a :提交的镜像作者；
-m :提交时的说明文字；
-p :在commit时，将容器暂停。

再次查看镜像，发现了本地新提交的codehi/nginx:v1的镜像

[root@localhost ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
codehi/nginx        v1                  1d8fca63675a        21 minutes ago      109MB
nginx               latest              f09fe80eb0e7        7 days ago          109MB
php                 7.1-fpm             7c5ccac5d47f        7 days ago          358MB

• 然后登陆到 docker hub

[root@localhost ~]# 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: codehi
Password: 
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded

• 将codehi/nginx:v1镜像推送到docker hub仓库中

[root@localhost ~]# docker push codehi/nginx:v1
The push refers to repository [docker.io/codehi/nginx]
67e805da8eae: Pushed 
6b5e2ed60418: Mounted from library/nginx 
92c15149e23b: Mounted from library/nginx 
0a07e81f5da3: Mounted from library/nginx 
v1: digest: sha256:729b836319d3f8bd501db5e7bfadc31d1a88f996b0e756f6fb6cd6abd4408962 size: 1156

登陆仓库后台查看上传成功

然后就可以在另一台服务器使用pull方法下载这个镜像

[root@localhost ~]# docker pull codehi/nginx:v1
v1: Pulling from codehi/nginx
6ae821421a7d: Already exists 
da4474e5966c: Already exists 
eb2aec2b9c9f: Already exists 
96e30fa1efc1: Pull complete 
Digest: sha256:422535f95685c43406e378b2c59a3a6564362a683ceac4b783b9d5cee347ae17
Status: Downloaded newer image for codehi/nginx:v1

push 时报错 "denied: requested access to the resource is denied" 的解决方法

报这个错说明tag需要改名字，由于之前commit的时候没有填tag，导致这块上传不上去，解决办法：

[root@localhost ~]# docker tag 1d8fca63675a codehi/nginx:v1