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nixos/kubo: increase maximum UDP buffer sizes

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The [quic-go wiki](https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes) now recommends a larger maximum send- and receive buffer size.
The change to the documentation was made in April 2024: https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes/_compare/597639d834d5d6c242d37d49a02ed04ca65332c9...a3327deff89d2428d48596ce0e643531f9944f99.

Without this change, the Kubo daemon will output this warning:
```
failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 7168 kiB, got: 4882 kiB). See https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes for details.
```
This can be seen while running the NixOS tests.
This commit is contained in:
Luflosi
2025-11-01 00:19:01 +01:00
parent 162bd217b1
commit 5a967f4a1e
1 changed files with 2 additions and 2 deletions
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nixos/modules/services/network-filesystems/kubo.nix
+2 -2
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@@ -330,8 +330,8 @@ in
environment.variables.IPFS_PATH = fakeKuboRepo;
# https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes
boot.kernel.sysctl."net.core.rmem_max" = lib.mkDefault 2500000;
boot.kernel.sysctl."net.core.wmem_max" = lib.mkDefault 2500000;
boot.kernel.sysctl."net.core.rmem_max" = lib.mkDefault 7500000;
boot.kernel.sysctl."net.core.wmem_max" = lib.mkDefault 7500000;
programs.fuse = lib.mkIf cfg.autoMount {
userAllowOther = true;