setup up binary cache on server #16

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opened 2026-07-16 22:45:03 +02:00 by luuumine · 1 comment

luuumine commented

2026-07-16 22:45:03 +02:00

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right now, the server builds every package and configuration for each commit to main or to a pr branch.

the cache stays in the server's /nix/store because the runner is native. this allows the server to rebuild itself very quickly by leveraging these auto builds and not rebuilding when updating it.

issue: other nodes, such as luminix or luminout, do not benefit from this at all. to update those nodes, i need to either rebuild the system locally on the device, or to deploy the update from the server.

solution: expose the server's nix store as a binary cache over the vpn. then, configure the other nodes to use it as a substituter so they can just download the pre-built binaries instantly instead of compiling everything locally.

right now, the server builds every package and configuration for each commit to main or to a pr branch. the cache stays in the server's /nix/store because the runner is native. this allows the server to rebuild itself very quickly by leveraging these auto builds and not rebuilding when updating it. issue: other nodes, such as luminix or luminout, do not benefit from this at all. to update those nodes, i need to either rebuild the system locally on the device, or to deploy the update from the server. solution: expose the server's nix store as a binary cache over the vpn. then, configure the other nodes to use it as a substituter so they can just download the pre-built binaries instantly instead of compiling everything locally.

luuumine added the

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2026-07-16 22:46:34 +02:00

luuumine commented

2026-08-09 00:49:03 +02:00

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see https://github.com/nix-community/harmonia ?