What if ERROR: http://dl-cdn.alpinelinux.org/alpine/v3.4/main fails when building a docker image

Today, I will talk to you about the failure of ERROR: http://dl-cdn.alpinelinux.org/alpine/v3.4/main when building a docker image. Many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something from this article.

When building a docker image, ERROR: http://dl-cdn.alpinelinux.org/alpine/v3.4/main often fails. Add the following two sentences to dockerfile (actually the first sentence, the second sentence is to check)

RUN echo-e http://mirrors.ustc.edu.cn/alpine/v3.4/main/ > / etc/apk/repositoriesRUN cat / etc/apk/repositories

Use domestic alpine sources

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