| 22 Jun 2024 |
|  hdhog changed their profile picture. | 13:23:13 |
| 24 Jun 2024 |
|  Pratham Patel (you can mention me) joined the room. | 05:42:56 |
| Pratham 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:
- Fetching binaries from
cache.nixos.org and serving on local network.
- 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.
- 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.
- 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 | 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:
- Fetching binaries from
cache.nixos.org and serving on local network.
- 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.
- 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.
- 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 | 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 |
| Pratham Patel (you can mention me) | ack | 06:24:56 |
|  @janik0:matrix.org left the room. | 08:37:05 |
| 27 Jun 2024 |
 hexa | techknowlogick is looking into implementing a nix caching story for gitea | 15:39:57 |
| hexa | https://github.com/go-gitea/gitea/issues/29824 | 15:40:03 |
| hexa |
This feature request is to add support to Gitea for the HTTP store type.
| 15:40:19 |
| hexa | wondering if someone can chime in on that issue | 15:40:24 |
| hexa |
I've been deep in the docs this past week thinking about how best to implement it
| 15:40:39 |
| 28 Jun 2024 |
|  @blitz:chat.x86.lol left the room. | 18:09:07 |
| 4 Jul 2024 |
|  @philiptaron:matrix.org left the room. | 15:46:20 |
| 6 Jul 2024 |
|  Sandro 🐧 joined the room. | 11:03:12 |
| 9 Jul 2024 |
|  sbc64 joined the room. | 16:49:08 |
| 11 Jul 2024 |
 @ronnypfannschmidt:matrix.org | Are there any docs for setting up and gcing a small personal cache, I have a Homeserver on nix that's available via ssh and id like to use it as cache server for personal needs | 16:25:40 |
| 12 Jul 2024 |
 samrose | Ronny: one route is to just use it as a remote build machine https://nix.dev/manual/nix/2.18/advanced-topics/distributed-builds. Nix would automatically cache the builds in the nix store of the machine. you can nix build with --keep-outputs to build up the roots you want to keep. | 00:09:00 |
| 13 Jul 2024 |
| @ronnypfannschmidt:matrix.org | In reply to @samrose:matrix.org
Ronny: one route is to just use it as a remote build machine https://nix.dev/manual/nix/2.18/advanced-topics/distributed-builds. Nix would automatically cache the builds in the nix store of the machine. you can nix build with --keep-outputs to build up the roots you want to keep. im building on one of my higher powered systems and have the cache on my rpi sytem (that shouldn't build) - i want to work out something where a github action pushes to the cache eventually | 10:19:31 |
| 14 Jul 2024 |
| samrose | Ronny: that is explained in https://nix.dev/manual/nix/2.22/command-ref/new-cli/nix3-copy you just have to figure out how to securely network to your machine. | 10:21:20 |
| @ronnypfannschmidt:matrix.org | In reply to @samrose:matrix.org
Ronny: that is explained in https://nix.dev/manual/nix/2.22/command-ref/new-cli/nix3-copy you just have to figure out how to securely network to your machine. this lacks all details on gc-proofing and/or lifecycle management - copied closures dont exactly help with controlling how one reclaims space | 10:31:16 |
| hexa | have you looked at attic so far? | 11:41:25 |
| hexa | it is a binary cache implementation that uses S3-compatible backends | 11:42:13 |
| hexa | https://github.com/zhaofengli/attic | 11:42:15 |
| hexa | gc is documented here https://docs.attic.rs/tutorial.html#garbage-collection | 11:42:34 |
| hexa | i'm using it with a local garage setup, and the same would likely work with minio, or some hosted setup | 11:44:02 |
| hexa | if you're interested I can share the config that I run on my local rock5b | 11:50:09 |
| @ronnypfannschmidt:matrix.org | i have taken a look at attic, however as my server has also the largest deploy set, i was hoping to enable using its store directly as a cache instead of creating a extra deployed service (when ssh and filesystem are kinda there) | 13:14:43 |
| hexa | you can use harmonia to serve your /nix/store | 13:18:33 |
| hexa | * you can use harmonia to serve your /nix/store | 13:18:44 |
