[post] How docker bind mount works

[at15]

Type

• request post from @at15

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Description

I often use bind mount as a way to 'share' between host and container. However, I don't know how it works.
I don't even know how mount w/o docker works. This post aims to solve the puzzles around bind mount in docker.

I plan to cover the following and the target audiences are ppl w/ little linux background (like me)

• vfs
• mount namespace
• write a simple file system (both fuse & in kernel?)

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