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hydra: set reasonable max-jobs and cores

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Yureka 2024-07-30 16:33:47 +02:00
parent 314f1cb363
commit f3828368e6
3 changed files with 50 additions and 6 deletions
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21
services/baremetal-builder/assignments.nix Normal file
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@ -0,0 +1,21 @@
# This file contains information on which builder(s) are providing how many
# job slots and providing which nix features
let
genBuilders = { offset ? 0, count, f }: builtins.genList (x: rec { name = "builder-${toString (offset + x)}"; value = f name; }) count;
in builtins.listToAttrs (
# The first 8 builders are general purpose
genBuilders { count = 8; f = name: {
cores = 8;
max-jobs = 8;
supported-features = [ "kvm" "nixos-test" ];
required-features = [ ];
}; }
++
# The last 2 builders are exclusively for big-parallel
genBuilders { offset = 8; count = 2; f = name: {
cores = 20;
max-jobs = 1;
supported-features = [ "kvm" "nixos-test" "big-parallel" ];
required-features = [ "big-parallel" ];
}; }
)

6
services/baremetal-builder/default.nix
View file

@ -40,8 +40,10 @@ in
"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGMnOLLX0vGTZbSJrUmF9ZFXt/NIId/MUrEpXmL2vxod"
];
};
nix.settings.trusted-users = [ "builder" "buildbot" ];
nix.settings = {
trusted-users = [ "builder" "buildbot" ];
inherit ((import ./assignments.nix).${config.networking.hostName}) max-jobs cores;
};
nixpkgs.hostPlatform = "x86_64-linux";
hardware.cpu.intel.updateMicrocode = true;

29
services/hydra/default.nix
View file

@ -13,15 +13,36 @@ let
# XXX: to support Nix's dumb public host key syntax (base64'd), this outputs
# a string with shell-style command interpolations: $(...).
mkBaremetalBuilder = { parallelBuilds, publicHostKey, host, speedFactor ? 1, user ? "builder", supportedSystems ? [ "i686-linux" "x86_64-linux" ], supportedFeatures ? [ "big-parallel" "kvm" "nixos-test" ] }:
"ssh://${user}@${host}?remote-store=/mnt ${lib.concatStringsSep "," supportedSystems} ${config.age.secrets.hydra-ssh-key-priv.path} ${toString parallelBuilds} ${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" ],
requiredFeatures ? [ ]
}:
let
supportedFeatures_ = if (supportedFeatures != []) then lib.concatStringsSep "," supportedFeatures else "-";
requiredFeatures_ = if (requiredFeatures != []) then lib.concatStringsSep "," requiredFeatures else "-";
in
"ssh://${user}@${host}?remote-store=/mnt ${lib.concatStringsSep "," supportedSystems} ${config.age.secrets.hydra-ssh-key-priv.path} ${toString parallelBuilds} ${toString speedFactor} ${supportedFeatures_} ${requiredFeatures_} $(echo -n '${publicHostKey}' | base64 -w0)";
# TODO:
# - generalize to new architectures
# - generalize to new features
baremetalBuilders = lib.concatStringsSep "\n"
(map (n: mkBaremetalBuilder {
parallelBuilds = 8; # TODO: do not hardcode this, use the node's builder configuration.
(map (n: let
assignments = (import ../baremetal-builder/assignments.nix).${n} or {
inherit (nodes.${n}.config.nix.settings) max-jobs;
supported-features = [ "big-parallel" "kvm" "nixos-test" ];
required-features = [];
};
in mkBaremetalBuilder {
parallelBuilds = assignments.max-jobs;
supportedFeatures = assignments.supported-features;
requiredFeatures = assignments.required-features;
publicHostKey = ssh-keys.machines.${n};
host = nodes.${n}.config.networking.fqdn;
}) cfg.builders);