auxolotl/buildbot-nix
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make evalWorkerCount configurable

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This commit is contained in:
Jörg Thalheim 2023-11-12 07:07:30 +01:00
parent c477a14d1a
commit 5b4ddd014c
3 changed files with 22 additions and 3 deletions
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12
buildbot_nix/__init__.py
View file

@ -413,7 +413,8 @@ def nix_eval_config(
github_token_secret: str,
supported_systems: list[str],
eval_lock: util.WorkerLock,
max_memory_size: int = 4096,
worker_count: int,
max_memory_size: int,
) -> util.BuilderConfig:
"""
Uses nix-eval-jobs to evaluate hydraJobs from flake.nix in parallel.
@ -441,7 +442,7 @@ def nix_eval_config(
command=[
"nix-eval-jobs",
"--workers",
multiprocessing.cpu_count(),
str(worker_count),
"--max-memory-size",
str(max_memory_size),
"--option",
@ -586,6 +587,7 @@ def config_for_project(
worker_names: list[str],
github: GithubConfig,
nix_supported_systems: list[str],
nix_eval_worker_count: int,
nix_eval_max_memory_size: int,
eval_lock: util.WorkerLock,
outputs_path: Path | None = None,
@ -678,6 +680,7 @@ def config_for_project(
[worker_names[0]],
github_token_secret=github.token_secret_name,
supported_systems=nix_supported_systems,
worker_count=nix_eval_worker_count,
max_memory_size=nix_eval_max_memory_size,
eval_lock=eval_lock,
),
@ -708,13 +711,15 @@ class NixConfigurator(ConfiguratorBase):
github: GithubConfig,
url: str,
nix_supported_systems: list[str],
nix_eval_max_memory_size: int = 4096,
nix_eval_worker_count: int | None,
nix_eval_max_memory_size: int,
nix_workers_secret_name: str = "buildbot-nix-workers",
outputs_path: str | None = None,
) -> None:
super().__init__()
self.nix_workers_secret_name = nix_workers_secret_name
self.nix_eval_max_memory_size = nix_eval_max_memory_size
self.nix_eval_worker_count = nix_eval_worker_count
self.nix_supported_systems = nix_supported_systems
self.github = github
self.url = url
@ -762,6 +767,7 @@ class NixConfigurator(ConfiguratorBase):
worker_names,
self.github,
self.nix_supported_systems,
self.nix_eval_worker_count or multiprocessing.cpu_count(),
self.nix_eval_max_memory_size,
eval_lock,
self.outputs_path,

4
examples/default.nix
View file

@ -38,6 +38,10 @@ in
};
# optional
# outputsPath = "/var/www/buildbot/nix-outputs";
# optional nix-eval-jobs settings
# evalWorkerCount = 8; # limit number of concurrent evaluations
# evalMaxMemorySize = "2048"; # limit memory usage per evaluation
};
})
buildbot-nix.nixosModules.buildbot-master

9
nix/master.nix
View file

@ -75,6 +75,14 @@ in
restarted.
'';
};
evalWorkerCount = lib.mkOption {
type = lib.types.nullOr lib.types.int;
default = null;
description = ''
Number of nix-eval-jobs worker processes. If null, the number of cores is used.
If you experience memory issues (buildbot-workers going out-of-memory), you can reduce this number.
'';
};
domain = lib.mkOption {
type = lib.types.str;
description = "Buildbot domain";
@ -141,6 +149,7 @@ in
),
url=${builtins.toJSON config.services.buildbot-master.buildbotUrl},
nix_eval_max_memory_size=${builtins.toJSON cfg.evalMaxMemorySize},
nix_eval_worker_count=${builtins.toJSON cfg.evalWorkerCount},
nix_supported_systems=${builtins.toJSON cfg.buildSystems},
outputs_path=${if cfg.outputsPath == null then "None" else builtins.toJSON cfg.outputsPath},
)