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enable setting performance impact of backup jobs

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ibizaman 2023-12-08 10:42:29 -08:00 committed by Pierre Penninckx
parent 207b2e44cb
commit c2ac071c72
1 changed files with 39 additions and 0 deletions
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39
modules/blocks/backup.nix
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@ -128,6 +128,31 @@ in
example = true;
type = lib.types.bool;
};
# Taken from https://github.com/HubbeKing/restic-kubernetes/blob/73bfbdb0ba76939a4c52173fa2dbd52070710008/README.md?plain=1#L23
performance = lib.mkOption {
description = "Reduce performance impact of backup jobs.";
default = {};
type = lib.types.submodule {
options = {
niceness = lib.mkOption {
type = lib.types.ints.between (-20) 19;
description = "nice priority adjustment, defaults to 15 for ~20% CPU time of normal-priority process";
default = 15;
};
ioSchedulingClass = lib.mkOption {
type = lib.types.enum [ "idle" "best-effort" "realtime" ];
description = "ionice scheduling class, defaults to best-effort IO. Only used for `restic backup`, `restic forget` and `restic check` commands.";
default = "best-effort";
};
ioPriority = lib.mkOption {
type = lib.types.nullOr (lib.types.ints.between 0 7);
description = "ionice priority, defaults to 7 for lowest priority IO. Only used for `restic backup`, `restic forget` and `restic check` commands.";
default = 7;
};
};
};
};
};
config = lib.mkIf (cfg.instances != {}) (
@ -291,5 +316,19 @@ in
mkSettings = name: instance: builtins.map (mkRepositorySettings name instance) instance.repositories;
in
lib.mkMerge (lib.flatten (lib.attrsets.mapAttrsToList mkSettings resticInstances));
systemd.services =
let
mkRepositorySettings = name: instance: repository: {
"restic-backups-${name}_${repoSlugName repository.path}".serviceConfig = {
Nice = cfg.performance.niceness;
IOSchedulingClass = cfg.performance.ioSchedulingClass;
IOSchedulingPriority = cfg.performance.ioPriority;
};
};
mkSettings = name: instance: builtins.map (mkRepositorySettings name instance) instance.repositories;
in
lib.mkMerge (lib.flatten (lib.attrsets.mapAttrsToList mkSettings resticInstances));
}
]);
}