tvl-depot/users/flokli/nixos/nixos-tvix-cache
Florian Klink 856886f01d chore(users/flokli/nixos-tvix-cache): switch to Mimir
VictoriaMetrics doesn't seem to "normalize" timeseries and label names,
which causes breakage in Grafana Dashboards querying label values.

Reported in VictoriaMetrics/VictoriaMetrics#7744.

Change-Id: I3397c4fd5911c9a3503d058c77c26e0db9300f36
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12867
Tested-by: BuildkiteCI
Reviewed-by: Jonas Chevalier <zimbatm@zimbatm.com>
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: flokli <flokli@flokli.de>
2024-12-04 22:37:23 +00:00
..
configuration.nix feat(users/flokli/nixos/nixos-tvix-cache): init 2024-11-23 09:40:21 +00:00
disko.nix feat(users/flokli/nixos/nixos-tvix-cache): init 2024-11-23 09:40:21 +00:00
monitoring.nix chore(users/flokli/nixos-tvix-cache): switch to Mimir 2024-12-04 22:37:23 +00:00
nar-bridge-module.nix feat(users/flokli/nixos/nixos-tvix-cache): init 2024-11-23 09:40:21 +00:00
nar-bridge.nix feat(users/flokli/nixos-tvix-cache): re-enable http2 2024-11-24 18:34:04 +00:00
OWNERS feat(users/flokli/nixos/nixos-tvix-cache): init 2024-11-23 09:40:21 +00:00
README.md feat(users/flokli/nixos/nixos-tvix-cache): init 2024-11-23 09:40:21 +00:00

nixos-tvix-cache

This is a fetch-through mirror of cache.nixos.org, hosted by NumTide.

The current machine is a SX65 Hetzner dedicated server with 4x22TB SATA disks, and 2x1TB NVMe disks.

The goals of this machine:

  • Exercise tvix-store and nar-bridge code
  • Collect usage metrics (see Grafana)
  • Identify bottlenecks in the current implementations and fix them
  • Replace cache.nixos.org?

You can configure this as a Nix substitutor on your systems like this:

  nix.settings.substituters = lib.mkForce [
    "https://nixos.tvix.store"
  ];

For store paths it hasn't already seen yet, it'll internally ingest its contents into tvix-castore (deduplicating in doing so).

Requests for NARs will dynamically reassemble the NAR representation on demand.

Metadata and signatures are preserved (which is why you don't need to add additional trusted keys). We need to produce the same data bit by bit, else the signature check in your Nix/Lix client would fail.

Be however aware that there's zero availability guarantees. We will frequently redeploy this box, and it might become unavailable without prior notice.

Tvix currently doesn't have garbage collection. If we run out of disk space, we might either move things to a bigger box or delete everything on it so far.

As it's only a cache, it should however re-ingest things again.