python脚本pull docker image

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原创 2024-10-22 09:20:07 561 阅读 AI 写同款· GEO 优化 ›

矩阵LED和矩阵按键先说矩阵LED，如图：下面以行几、列几的表达方法说明三极管可以当做开关使用由图可知，如果想让一个LED亮，那么它对应的行和列的三极管都要导通。如果这个矩阵每次只亮一个LED，那么正常写程序没问题。如果我们想让LED1和LED6亮，其他灯不亮，则需要开启行1、行2、列1、列2，随之带来的问题就是LED2和LED5也会跟着亮起来。解决方法类似于扫描，因为单片机运行速度很快，可以在很短的时间内开关数次而肉眼看不到。所以我们可以每次只亮一列（排）灯，亮单位时间后关掉同时开启另外一列（排），如此四次一循环阅读详情

在用docker pull ubuntu:20.04时遇到如下错误：

$ docker pull ubuntu:20.04         
Error response from daemon:
 Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection 
 (Client.Timeout exceeded while awaiting headers)

似乎是网络的问题，找了很多方法都解决不了，于是想绕过docker pull，直接下载image, 然后本地load.

python文件docker_pull_image.py放在这里

 python docker_pull.py ubuntu:20.04 -o ubuntu_20_04.tar
Multi-architecture image detected. Selecting appropriate manifest...
Total uncompressed size of all layers: 24.77 MB
Layer 0 verified successfully.
ubuntu:20.04 image (arm64) downloaded and saved as ubuntu_20_04.tar
Compressed tar size: 24.79 MB
Load the image using: docker load -i ubuntu_20_04.tar

再试一下hello-world

$ python docker_pull_image.py hello-world
No tag specified, using latest tag: latest
Multi-architecture image detected. Selecting appropriate manifest...
Total uncompressed size of all layers: 0.00 MB
Layer 0 verified successfully.
hello-world:latest image (amd64) downloaded and saved as hello-world_latest.tar
Compressed tar size: 0.01 MB
Load the image using: docker load -i hello-world_latest.tar

$ docker load -i hello-world_latest.tar
Loaded image: hello-world:latest

$ docker run -it hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.