NFS UID mapping not working about d4m-nfs HOT 7 CLOSED

@LennardWesterveld did you remove /Users from the Docker for Mac preferences? From the Readme:

You can now specify what mounts you want in the d4m-nfs-mounts.txt file. Note that if you do this, you need to make sure that it does not conflict with D4M settings, in other words if you want to have /Users be served by NFS instead of osxfs you will need to remove it from the D4M Preferences -> File Sharing. The /tmp share must stay since that is how d4m-nfs exchanges information with the D4M Moby VM.

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@if-kenn Yes i did: https://www.dropbox.com/s/yy5w6vglzwst983/Schermafdruk%202016-12-01%2010.03.14.png?dl=0

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@LennardWesterveld one other thing that I thought of is that you are trying to export the mounts with UID 1000 and GID 1000 that probably don't exist, unless you created a user and group on your Mac with these IDs.

The idea behind UID/GID mapping is that the NFS host export maps permissions the to corresponding UID/GID on the system, not change the owner on the client.

As a sanity check to see if things work, change:

/Volumes:/Volumes:1000:1000
/private:/private:1000:1000
/Users:/Users:1000:1000

to:

/Volumes:/Volumes:0:0
/private:/private:0:0
/Users:/Users:0:0

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For better explanation see:

https://linux.die.net/man/5/exports

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Hi @if-kenn,
Alright i understand, so thats why the owner ship doen't change in the docker container.
So when i change it to 0:0 the mount permissions will be root so there will be no issue when writing?

Anyway i will try it today if that works, probably thats solves my issue.

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So to accomplish what you are wanting, you would use the 0:0 ids and on your Mac change desired ownership of files to 1000:1000, e.g:

sudo chmod 1000:1000 /Users/lennard/foobar

Even though the user and group does not exist most Unix systems still allow you to assign a numeric ID instead of a name. Note that you might have to add you user to the 1000 group or some such thing. Every circumstance requires a different tactic, even when not using NFS.

Good luck!

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@LennardWesterveld I am going to consider this closed, please reopen or make a new issue if you need to.

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