How to share nix store among multiple aws instances?

Multi tool use
Multi tool use

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
0
down vote

favorite












I am using nixops and want to reduce disk space consumption by sharing nix store among instances.



Possible implementation:



  • share /nix/store store through elastic file system.

  • make cron job on random machine inside network that runs nix-collect-garbage -d. This will remove all packages that are not linked with first machine: actually stale packages and packages of other machines inside network. To restore them first machine triggers nixos-rebuild switch on other machines inside network.

Can this be done better/does this make sense?




aws nixos nix




share|improve this question


















  • 1




    Not sure if this works for NixOS, but I once shared the nix store via NFS: nixos.wiki/wiki/NFS#Nix_store_on_NFS You could probably put overlayfs on top of NFS to allow local modifications.
    – Mic92
    May 22 at 15:13











  • The nixos iso also shows how readonly and read-write layers can be overlayed: github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/…
    – Mic92
    May 22 at 15:17











  • Only having a single read-only /nix/store has it caveats as the nix store also store configuration files. Sharing the same elastic filesystem could work so, if your network storage implements posix file locking. nix-collect-garbage usually relies on seeing other processes using files - in a distributed settings it might delete files in use.
    – Mic92
    May 22 at 15:21















up vote
0
down vote

favorite












I am using nixops and want to reduce disk space consumption by sharing nix store among instances.



Possible implementation:



  • share /nix/store store through elastic file system.

  • make cron job on random machine inside network that runs nix-collect-garbage -d. This will remove all packages that are not linked with first machine: actually stale packages and packages of other machines inside network. To restore them first machine triggers nixos-rebuild switch on other machines inside network.

Can this be done better/does this make sense?




aws nixos nix




share|improve this question


















  • 1




    Not sure if this works for NixOS, but I once shared the nix store via NFS: nixos.wiki/wiki/NFS#Nix_store_on_NFS You could probably put overlayfs on top of NFS to allow local modifications.
    – Mic92
    May 22 at 15:13











  • The nixos iso also shows how readonly and read-write layers can be overlayed: github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/…
    – Mic92
    May 22 at 15:17











  • Only having a single read-only /nix/store has it caveats as the nix store also store configuration files. Sharing the same elastic filesystem could work so, if your network storage implements posix file locking. nix-collect-garbage usually relies on seeing other processes using files - in a distributed settings it might delete files in use.
    – Mic92
    May 22 at 15:21













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I am using nixops and want to reduce disk space consumption by sharing nix store among instances.



Possible implementation:



  • share /nix/store store through elastic file system.

  • make cron job on random machine inside network that runs nix-collect-garbage -d. This will remove all packages that are not linked with first machine: actually stale packages and packages of other machines inside network. To restore them first machine triggers nixos-rebuild switch on other machines inside network.

Can this be done better/does this make sense?




aws nixos nix




share|improve this question














I am using nixops and want to reduce disk space consumption by sharing nix store among instances.



Possible implementation:



  • share /nix/store store through elastic file system.

  • make cron job on random machine inside network that runs nix-collect-garbage -d. This will remove all packages that are not linked with first machine: actually stale packages and packages of other machines inside network. To restore them first machine triggers nixos-rebuild switch on other machines inside network.

Can this be done better/does this make sense?





aws nixos nix





share|improve this question













share|improve this question




share|improve this question








edited Jan 3 at 20:45









Jeff Schaller

31.8k848109




31.8k848109










asked Jan 3 at 20:23









srghma

1296




1296







  • 1




    Not sure if this works for NixOS, but I once shared the nix store via NFS: nixos.wiki/wiki/NFS#Nix_store_on_NFS You could probably put overlayfs on top of NFS to allow local modifications.
    – Mic92
    May 22 at 15:13











  • The nixos iso also shows how readonly and read-write layers can be overlayed: github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/…
    – Mic92
    May 22 at 15:17











  • Only having a single read-only /nix/store has it caveats as the nix store also store configuration files. Sharing the same elastic filesystem could work so, if your network storage implements posix file locking. nix-collect-garbage usually relies on seeing other processes using files - in a distributed settings it might delete files in use.
    – Mic92
    May 22 at 15:21













  • 1




    Not sure if this works for NixOS, but I once shared the nix store via NFS: nixos.wiki/wiki/NFS#Nix_store_on_NFS You could probably put overlayfs on top of NFS to allow local modifications.
    – Mic92
    May 22 at 15:13











  • The nixos iso also shows how readonly and read-write layers can be overlayed: github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/…
    – Mic92
    May 22 at 15:17











  • Only having a single read-only /nix/store has it caveats as the nix store also store configuration files. Sharing the same elastic filesystem could work so, if your network storage implements posix file locking. nix-collect-garbage usually relies on seeing other processes using files - in a distributed settings it might delete files in use.
    – Mic92
    May 22 at 15:21








1




1




Not sure if this works for NixOS, but I once shared the nix store via NFS: nixos.wiki/wiki/NFS#Nix_store_on_NFS You could probably put overlayfs on top of NFS to allow local modifications.
– Mic92
May 22 at 15:13





Not sure if this works for NixOS, but I once shared the nix store via NFS: nixos.wiki/wiki/NFS#Nix_store_on_NFS You could probably put overlayfs on top of NFS to allow local modifications.
– Mic92
May 22 at 15:13













The nixos iso also shows how readonly and read-write layers can be overlayed: github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/…
– Mic92
May 22 at 15:17





The nixos iso also shows how readonly and read-write layers can be overlayed: github.com/NixOS/nixpkgs/blob/master/nixos/modules/installer/…
– Mic92
May 22 at 15:17













Only having a single read-only /nix/store has it caveats as the nix store also store configuration files. Sharing the same elastic filesystem could work so, if your network storage implements posix file locking. nix-collect-garbage usually relies on seeing other processes using files - in a distributed settings it might delete files in use.
– Mic92
May 22 at 15:21





Only having a single read-only /nix/store has it caveats as the nix store also store configuration files. Sharing the same elastic filesystem could work so, if your network storage implements posix file locking. nix-collect-garbage usually relies on seeing other processes using files - in a distributed settings it might delete files in use.
– Mic92
May 22 at 15:21
















active

oldest

votes











Your Answer







StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: false,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);








 

draft saved


draft discarded


















StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f414625%2fhow-to-share-nix-store-among-multiple-aws-instances%23new-answer', 'question_page');

);

Post as a guest






















active

oldest

votes













active

oldest

votes









active

oldest

votes






active

oldest

votes










 

draft saved


draft discarded


























 


draft saved


draft discarded














StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f414625%2fhow-to-share-nix-store-among-multiple-aws-instances%23new-answer', 'question_page');

);

Post as a guest
































































GH,EDD3XN,wzChI,QtUntboM4n Ygl,5xZXec8xv3 ZBzbU3BH3dJk
-
dQ55tl,C h,8SrnIlxG2vblbvCJOj7 4Poh,rwCSaz1rNjVE5pqnvj

Popular posts from this blog

How to check contact read email or not when send email to Individual?

Image
Clash Royale CLAN TAG #URR8PPP up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Sep 26 at 0:12 ToanLuong 49 9 add a comment  |  up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this questi...
Read more

How many registers does an x86_64 CPU actually have?

Image
Clash Royale CLAN TAG #URR8PPP up vote 2 down vote favorite I am currently learning reverse engineering and am studying the flags register. I had in my mind that rflags was just another name for one of the 16 general purpose registers, for example rax or rbx . But it looks like rflags is actually an additional register. So that makes 17 registers in total... how many more could there be? I have spent at least an hour on this and found numerous different answers. The best answer so far is this, which says that there are 40 registers in total. 16 General Purpose Registers 2 Status Registers 6 Code Segment Registers 16 SSE Registers 8 FPU/MMX Registers But if I add that up, I get 48. Could anybody provide an official answer on how many registers an x86_64 CPU has (e.g. an Intel i7). Additionally, I have seen references to 'hardware' and 'architectural' registers. What are those registers and how many are there? register x86-64 share | improve this...
Read more

Displaying single band from multi-band raster using QGIS

Image
Clash Royale CLAN TAG #URR8PPP 1 How can I extract a single band from multi-band raster in QGIS? I have an remote sensed image which has 6 bands (including NDVI band), I want to display each band separately, but have no idea how to do. I have seen some questions similar here but none worked for me. The original image (has 6 bands) is: I want to display the band 6 which should be like this: But I tried gdal_translate, and couldn't get the correct result. What I have got is: qgis raster multi-band share | improve this question edited Mar 5 at 0:53 Summer asked Mar 4 at 6:42 Summer Summer 23 6 Is this any help gis.stackexchange.com/questions/220658/… ? if not gis.stackexchange.com/questions/62133/… might help. – Michael Stimson Mar 4 at 6:46 Thanks for answering but when I used gdal_translate, qgis showed that 'Error 4: Kayena.tif: No such file or directory". Would you know how to fi...
Read more