Share access to a directory in and out of docker

[tech687]

@rimelek

You either have rootless Docker or Docker DEsktop that works similarly regarding file permissions. The reason is exactly security.

Meaning what?
I’ve never used Docker Desktop…

So your own user’s file could be read by root in the container and you don’t actually need to mount anything from the root user.

Indeed.
What should I mount?
It seems obvious to me that there is nothing to mount.

Anyway, could you try to explain better (I don’t speak English)?

@tech687

In practice, how can you give two or more users access to the same directory?

It is about permissions on Linux. With or without containers, it doesn’t matter.

It is about permissions on Linux: OK
With or without containers, it doesn’t matter: Meaning what?

If the files have the right ownerships and permissions, and users have the right groups, multiple users can access the same files.

Difference between ownership and permissions?

In rootless Docker you need to know about the UID mapping which is the same as when using user namespaces as that is what the rootless Docker is based on.

Simply put, what do you mean by mapping?

Something like the following?

$ id
uid=1000(abc) gid=1000(abc) gruppi=1000(abc),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),122(lpadmin),134(lxd),135(sambashare),142(docker)