[Nix-dev] Nix-Store sharing (with NFS + AUFS)?

[Matthias Beyer]

Hi,

I'm currently thinking about the following problem:

I want to share the /nix/store from one Master machine to several Slaves, but
in a slightly different way than is currently possible with ssh / http:

I want _one_ store which contains software, which then can be used by all the
slaves (like you'd do with NFS).

The Slave machine should still be able to install software with the package
manager (nix) but only locally, not globally.

So the Slave installs software to /nix/store locally, while /nix/store contains
store entries which are hosted on the master.

My first idea would be NFS + AUFS, but maybe there are nix-buildin
possibilities?


Use-Case: Provide a standard-set of software but allow each VM to install own
software if needed, while keeping the amount of used storage as small as
possible.

With the solution I'm searching for, 100 VMs which only use the standard
set on software would cause 1 % Storage-use (the packages are only phyiscally
available on one machine: the master) of the amount of storage which would be
needed with each VM installing the stuff.

-- 
Mit freundlichen Grüßen,
Kind regards,
Matthias Beyer

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