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{ | ||
config, | ||
lib, | ||
pkgs, | ||
... | ||
}: | ||
let | ||
cfg = config.services.fluent-bit; | ||
|
||
yamlFormat = pkgs.formats.yaml { }; | ||
|
||
configurationFile = | ||
if (cfg.configurationFile == null) then | ||
(yamlFormat.generate "fluent-bit.yaml" cfg.configuration) | ||
else | ||
cfg.configurationFile; | ||
in | ||
{ | ||
options.services.fluent-bit = { | ||
enable = lib.mkEnableOption "Fluent Bit"; | ||
package = lib.mkPackageOption pkgs "fluent-bit" { }; | ||
configurationFile = lib.mkOption { | ||
type = lib.types.nullOr lib.types.path; | ||
default = null; | ||
description = '' | ||
Fluent Bit configuration. See | ||
<https://docs.fluentbit.io/manual/administration/configuring-fluent-bit/yaml> | ||
for supported values. | ||
{option}`configurationFile` takes precedence over {option}`configuration`. | ||
Note: Restricted evaluation blocks access to paths outside the Nix store. | ||
This means detecting content changes for mutable paths (i.e. not input or content-addressed) can't be done. | ||
As a result, `nixos-rebuild` won't reload/restart the systemd unit when mutable path contents change. | ||
`systemctl restart fluent-bit.service` must be used instead. | ||
''; | ||
example = /etc/fluent-bit/fluent-bit.yaml; | ||
}; | ||
configuration = lib.mkOption { | ||
type = yamlFormat.type; | ||
default = { }; | ||
description = '' | ||
See {option}`configurationFile`. | ||
{option}`configurationFile` takes precedence over {option}`configuration`. | ||
''; | ||
example = { | ||
service = { | ||
grace = 30; | ||
}; | ||
pipeline = { | ||
inputs = [ | ||
{ | ||
name = "systemd"; | ||
systemd_filter = "_SYSTEMD_UNIT=fluent-bit.service"; | ||
} | ||
]; | ||
outputs = [ | ||
{ | ||
name = "file"; | ||
path = "/var/log/fluent-bit"; | ||
file = "fluent-bit.out"; | ||
} | ||
]; | ||
}; | ||
}; | ||
}; | ||
user = lib.mkOption { | ||
type = lib.types.str; | ||
default = "root"; | ||
description = '' | ||
The user that runs Fluent Bit. | ||
''; | ||
example = "fluent-bit"; | ||
}; | ||
# See https://docs.fluentbit.io/manual/administration/configuring-fluent-bit/yaml/service-section. | ||
grace = lib.mkOption { | ||
type = lib.types.ints.positive; | ||
default = 5; | ||
description = '' | ||
The grace time in `seconds` as an integer value. The engine loop uses a grace timeout to define the wait time before exiting. | ||
The `service.grace` option in the Fluent Bit configuration should be ≤ this option. | ||
''; | ||
example = 30; | ||
}; | ||
}; | ||
|
||
config = lib.mkIf cfg.enable { | ||
# See https://github.com/fluent/fluent-bit/blob/v3.2.2/init/systemd.in. | ||
systemd.services.fluent-bit = { | ||
description = "Fluent Bit"; | ||
after = [ "network.target" ]; | ||
requires = [ "network.target" ]; | ||
wantedBy = [ "multi-user.target" ]; | ||
serviceConfig = { | ||
User = cfg.user; | ||
ExecStart = builtins.concatStringsSep " " [ | ||
"${cfg.package}/bin/fluent-bit" | ||
"--config ${configurationFile}" | ||
]; | ||
TimeoutStopSec = cfg.grace; | ||
Restart = "always"; | ||
}; | ||
}; | ||
}; | ||
} |
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Original file line number | Diff line number | Diff line change |
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import ./make-test-python.nix ( | ||
{ lib, pkgs, ... }: | ||
{ | ||
name = "fluent-bit"; | ||
|
||
nodes.machine = | ||
{ config, pkgs, ... }: | ||
{ | ||
services.fluent-bit = { | ||
enable = true; | ||
configuration = { | ||
pipeline = { | ||
inputs = [ | ||
{ | ||
name = "systemd"; | ||
systemd_filter = "_SYSTEMD_UNIT=fluent-bit.service"; | ||
} | ||
]; | ||
outputs = [ | ||
{ | ||
name = "file"; | ||
path = "/var/log/fluent-bit"; | ||
file = "fluent-bit.out"; | ||
} | ||
]; | ||
}; | ||
}; | ||
}; | ||
|
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systemd.services.fluent-bit.serviceConfig.LogsDirectory = "fluent-bit"; | ||
}; | ||
|
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testScript = '' | ||
start_all() | ||
machine.wait_for_unit("fluent-bit.service") | ||
machine.wait_for_file("/var/log/fluent-bit/fluent-bit.out") | ||
''; | ||
} | ||
) |
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