!CcTBuBritXGywOEGWJ:matrix.org

NixOS Binary Cache Self-Hosting

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About how to host a very large-scale binary cache and more48 Servers

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19 May 2024
@edef1c:matrix.orgedef
In reply to @picnoir:alternativebit.fr
For the lurkers, I've been told in a sidechannel the parquet archive containing all the narinfos is in the order of ~100GB magnitude.
yeah, my most recent copy is a few months old, but it's ~90G
16:05:18
@edef1c:matrix.orgedef
In reply to @picnoir:alternativebit.fr
For the lurkers, I've been told in a sidechannel the parquet archive containing all the narinfos is in the order of ~100GB magnitude.
* yeah, my most recent scrape is a few months old, but it's ~90G
16:06:13
20 May 2024
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22 May 2024
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23 May 2024
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24 May 2024
@jeff:ocjtech.usJeffWould it be a good/bad idea to run "attic watch-store" as a service? I want to push as much as possible into the cache and don't want to remember to run it manually...16:29:04
29 May 2024
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19 Jun 2024
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21 Jun 2024
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24 Jun 2024
@thefossguy:matrix.orgPratham Patel (you can mention me) joined the room.05:42:56
@thefossguy:matrix.orgPratham Patel (you can mention me)

Hello everyone, I finally have enough SSDs and machines to make sense of a network-wide Nix cache. My use case is as the following:

  1. Fetching binaries from cache.nixos.org and serving on local network.
  2. Any packages that not on cache.nixos.org (i.e. my personal derivations) will be built by the NAS itself by making use of my NixOS config repo and evaluating all [possible] expressions.
  3. Because of 1 and 2, the NAS won't accept any remote build requests nor accept any paths being pushed to it. It will already have everything by the time a local machine requests it.
  4. No authentication because of 3. "Public" serve.

I believe nix-serve should serve me better than attic but I'm not sure. This is mostly a question getting feedback on my approach.

Additionally, I am also thinking if maybe I should netboot all my headless SBCs from this NAS. How should/would that work?

05:54:38
@magic_rb:matrix.redalder.orgmagic_rb
In reply to @thefossguy:matrix.org

Hello everyone, I finally have enough SSDs and machines to make sense of a network-wide Nix cache. My use case is as the following:

  1. Fetching binaries from cache.nixos.org and serving on local network.
  2. Any packages that not on cache.nixos.org (i.e. my personal derivations) will be built by the NAS itself by making use of my NixOS config repo and evaluating all [possible] expressions.
  3. Because of 1 and 2, the NAS won't accept any remote build requests nor accept any paths being pushed to it. It will already have everything by the time a local machine requests it.
  4. No authentication because of 3. "Public" serve.

I believe nix-serve should serve me better than attic but I'm not sure. This is mostly a question getting feedback on my approach.

Additionally, I am also thinking if maybe I should netboot all my headless SBCs from this NAS. How should/would that work?

For the netboot, diregarding how you get the kernel/initrd to the SBC, the rootfs must exist somewhere, your options are tmpfs or nfs. What you could do is only keep /boot on each SBC and then have it mount /nix/store over nfs, and tmpfs on /
06:15:10
@magic_rb:matrix.redalder.orgmagic_rb That would get you almost complete netboot but you dont have to bother with ipxe and such. The wear imposed on the sdcard by keeping /boot there is minimal and you already have to put the ipxe bootloader somewhere so might as well keep boot there 06:16:25
@thefossguy:matrix.orgPratham Patel (you can mention me)ack06:24:56
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27 Jun 2024
@hexa:lossy.networkhexatechknowlogick is looking into implementing a nix caching story for gitea15:39:57
@hexa:lossy.networkhexahttps://github.com/go-gitea/gitea/issues/2982415:40:03
@hexa:lossy.networkhexa

This feature request is to add support to Gitea for the HTTP store type.

15:40:19
@hexa:lossy.networkhexawondering if someone can chime in on that issue15:40:24

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