nixos/buildbot: enable configurable keepalive for buildbot worker

In the current implementation, there's no possibility to modify the default
parameter for keepalive. This is a number that indicates how frequently
keepalive messages should be sent from the worker to the buildmaster,
expressed in seconds. The default (600) causes a message to be sent to
the buildmaster at least once every 10 minutes.

If the worker is behind a NAT box or stateful firewall, these messages
may help to keep the connection alive: some NAT boxes tend to forget about
a connection if it has not been used in a while. When this happens, the
buildmaster will think that the worker has disappeared, and builds will
time out. Meanwhile the worker will not realize than anything is wrong.
This commit is contained in:
Roman Sharapov 2020-07-13 13:07:20 -04:00
parent 21104fcabd
commit d53d13b6ee

View file

@ -29,7 +29,7 @@ let
with open('${cfg.workerPassFile}', 'r', encoding='utf-8') as passwd_file:
passwd = passwd_file.read().strip('\r\n')
keepalive = 600
keepalive = ${toString cfg.keepalive}
umask = None
maxdelay = 300
numcpus = None
@ -116,6 +116,15 @@ in {
description = "Specifies the Buildbot Worker connection string.";
};
keepalive = mkOption {
default = 600;
type = types.int;
description = "
This is a number that indicates how frequently keepalive messages should be sent
from the worker to the buildmaster, expressed in seconds.
";
};
package = mkOption {
type = types.package;
default = pkgs.python3Packages.buildbot-worker;