[Nix-dev] Moving /nix/store to another partition

[Sergey Mironov]

Thanks! I'll try to relocate it this way.

Regards,
Sergey

2014-07-28 14:41 GMT+04:00 Eelco Dolstra <eelco.dolstra at logicblox.com>:
> Hi,
>
> On 28/07/14 11:54, Sergey Mironov wrote:
>
>> Hi, List!  Looks like I've made not wise choice of locating /nix/store
>> in root (/) partition on my build server. Now all 'no space left on a
>> device' are my friends.  Is it possible to relocate /nix/store's
>> contents into /home (located on a much larger partition) without
>> re-installing the entire system? In other words, I want my /nix/store
>> to be a symlink pointing to /home/nix/store.   Is it safe to just boot
>> from the CD, move /nix/store to /home and drop the symlink ?
>
> /nix/store or /nix cannot be symlinks, but they can be bind mounts. So you can
> boot from the CD, move /nix to /home, and add an entry like:
>
>   fileSystems."/nix" =
>     { device = "/home/nix";
>       fsType = "none";
>       options = "bind";
>     };
>
> to configuration.nix. Also set the neededForBoot option on the /home filesystem
> to true, otherwise it won't be mounted in stage 1 of the boot, and the bind
> mount will fail.
>
> You can then run nixos-install to rebuild the configuration (which shouldn't
> take long since the only change was to fileSystems).
>
> You can probably also do this without the CD by: 1) updating configuration.nix
> as above; 2) running "nixos-rebuild boot"; 3) copying /nix to /home/nix; 4)
> rebooting.
>
> --
> Eelco Dolstra | LogicBlox, Inc. | http://nixos.org/~eelco/
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