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Editor to share with you how to minimize the docker image, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's learn about it!

How to make the mirror as small as possible

I think of from scratch very much, but there is no basic image.

FROM scratchCOPY p / ENTRYPOINT ["/ p"]

There are several points to pay attention to:

ENTRYPOINT or CMD must use [] this mode. If direct / p starts with sh, scratch fails without shell.

Binary programs must be compiled statically, that is, dynamic libraries that cannot rely on libc or something

Dynamically compiled bin programs:

[root@dev-86-205ci-sftp] # ldd p linux-vdso.so.1 = > (0x00007ffd6ef7b000) libpthread.so.0 = > / lib64/libpthread.so.0 (0x00007fa28f94e000) libc.so.6 = > / lib64/libc.so.6 (0x00007fa28f58d000) / lib64/ld-linux-x86-64.so.2 (0x00007fa28fb72000)

The bin program that comes out in this case may have a problem:

Standard_init_linux.go:175: exec user process caused "no such file or directory"

Statically compiled bin programs, which we need for scratch:

[root@dev-86-205ci-sftp] # ldd p is not a dynamic executable file

Static compilation commands in golang:

Go build-- ldflags'--linkmode external-extldflags "- static"

If you don't compile statically, you may have to copy a bunch of dynamic libraries into the image, as many lowB do.

The above is all the contents of the article "how to minimize docker mirroring". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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