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docker can I mount os from another container

原文 2015-03-31 00:37:59 4 1 docker

I have been setting up a runtime with several images. I have been keeping them lean with one process and minimal os, based on debian (because I'm used to that).

However, I wonder why I need all these copies of the OS? Could I build one image with OS (to separate from host os) and then have other images mount relevant parts (read-only or copy where necessary -- /etc/ ...)?

I tried googling for this pattern but didn't find it. Are there any pitfalls? Does docker need "something" present to be able to boot an image even before mounting?

1 answers

As long as you're using FROM debian as the base of each of your images, you only have one copy of debian . That's the beauty of using a copy-on-write filesystem like AUFS or btrfs.

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docker can I mount os from another container

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1 answers

solution1 1 ACCPTED 2015-03-31 01:27:52

solution1
1 ACCPTED 2015-03-31 01:27:52