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hydra: reduce number of parallel builds per builder to limit RAM consumption

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Pierre Bourdon 2024-07-13 04:38:24 +02:00
parent 64079be3c0
commit 293bc52ace
Signed by: delroth
GPG key ID: 6FB80DCD84DA0F1C
1 changed files with 3 additions and 3 deletions
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6
services/hydra/default.nix
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@ -13,15 +13,15 @@ let
# XXX: to support Nix's dumb public host key syntax (base64'd), this outputs
# a string with shell-style command interpolations: $(...).
mkBaremetalBuilder = { nrCores, publicHostKey, host, speedFactor ? 1, user ? "builder", supportedSystems ? [ "i686-linux" "x86_64-linux" ], supportedFeatures ? [ "big-parallel" "kvm" "nixos-test" ] }:
"ssh://${user}@${host} ${lib.concatStringsSep "," supportedSystems} ${config.age.secrets.hydra-ssh-key-priv.path} ${toString nrCores} ${toString speedFactor} ${lib.concatStringsSep "," supportedFeatures} - $(echo -n '${publicHostKey}' | base64 -w0)";
mkBaremetalBuilder = { parallelBuilds, publicHostKey, host, speedFactor ? 1, user ? "builder", supportedSystems ? [ "i686-linux" "x86_64-linux" ], supportedFeatures ? [ "big-parallel" "kvm" "nixos-test" ] }:
"ssh://${user}@${host} ${lib.concatStringsSep "," supportedSystems} ${config.age.secrets.hydra-ssh-key-priv.path} ${toString parallelBuilds} ${toString speedFactor} ${lib.concatStringsSep "," supportedFeatures} - $(echo -n '${publicHostKey}' | base64 -w0)";
# TODO:
# - generalize to new architectures
# - generalize to new features
baremetalBuilders = lib.concatStringsSep "\n"
(map (n: mkBaremetalBuilder {
nrCores = 40; # TODO: do not hardcode this, use the node's builder configuration.
parallelBuilds = 8; # TODO: do not hardcode this, use the node's builder configuration.
publicHostKey = ssh-keys.machines.${n};
host = nodes.${n}.config.networking.fqdn;
}) cfg.builders);