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add log backfill services

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Daniel Barlow
2025-10-27 21:19:43 +00:00
parent 0f90f3f46d
commit 8106389b74
1 changed files with 31 additions and 5 deletions
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36
modules/s6/default.nix
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@@ -28,6 +28,7 @@ let
# don't put this in /run/log because logtap tries to create it
# before s6-log makes the directory
fifo = "/run/.log-fifo";
fifoBackfill = "/run/.log-fifo-backfill";
logger =
let
@@ -269,13 +270,38 @@ in
};
config = {
programs.busybox.applets = mkIf config.logging.shipping.enable [ "mkfifo" ];
services.log-shipper =
let cfg = config.logging.shipping; in
mkIf config.logging.shipping.enable (
longrun {
let
cfg = config.logging.shipping;
dependencies = config.logging.shipping.dependencies;
in mkIf cfg.enable (
let
live = longrun {
name = "log-shipper-live";
run = "${cfg.command} ${fifo}";
inherit dependencies;
};
source = longrun {
name = "log-shipper-backfill-source";
# if backfill dies we want the service manager to retry
# it (assuming that its dependencies are still healthy).
# But if it reaches the end of logs to backfill, we want
# it to rest quietly not to exit
run = ''
test -p ${fifoBackfill} || mkfifo ${fifoBackfill}
(cat ${config.logging.directory}/*; sleep 86400) | ${pkgs.logtap}/bin/backfill ${fifoBackfill} ${fifoBackfill}.ts
'';
dependencies = dependencies ++ [live];
};
sink = longrun {
name = "log-shipper-backfill-sink";
run = "${cfg.command} ${fifoBackfill}";
dependencies = dependencies ++ [ source ];
};
in bundle {
name = "log-shipper";
run = "${cfg.command} ${fifo}";
inherit (config.logging.shipping) dependencies;
contents = [live source sink];
}
);