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dyn-dns: better implementation

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Colin
2024-11-12 02:31:50 +00:00
parent 2134a9c738
commit 4779ad8f41
1 changed files with 21 additions and 14 deletions
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35
modules/services/dyn-dns.nix
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@@ -86,7 +86,8 @@ in
echo "UPNP changed $oldUpnp -> $newUpnp"
fi
exit $(test -f '${cfg.ipPath}' -a '${cfg.upnpPath}')
exit $(test -f '${cfg.ipPath}')
# exit $(test -f '${cfg.ipPath}' -a -f '${cfg.upnpPath}')
'';
};
@@ -95,27 +96,33 @@ in
timerConfig.OnUnitInactiveSec = cfg.interval;
};
systemd.targets.dyn-dns-valid = {
description = "active while dyn dns data exists, and is restarted whenever dyn dns data changes";
wants = [ "dyn-dns.service" ]; #< restarts of this unit *shouldn't* be propagated to dyn-dns.service
systemd.targets.dyn-dns-exists = {
# consumers depend directly on this target for permission to *start*
# once active, this target should never de-activate
description = "initial acquisition of dynamic DNS data";
wants = [ "dyn-dns.service" ];
after = [ "dyn-dns.service" ];
requiredBy = cfg.restartOnChange; #< requiredBy will propagate restarts (and explicit stops, but not starts)
wantedBy = cfg.restartOnChange;
before = cfg.restartOnChange;
};
systemd.paths.dyn-dns-changed = {
description = "react to new dynamic DNS data, and if the address changed then propagate that out";
wants = [ "dyn-dns.service" ];
after = [ "dyn-dns.service" ];
wantedBy = [ "dyn-dns-valid.target" ];
before = [ "dyn-dns-valid.target" ];
pathConfig.PathChanged = [ cfg.ipPath ];
systemd.targets.dyn-dns-events = {
# consumers depend on this to be restarted whenever DNS changes (after acquisition)
description = "event system that notifies via restart whenever dynamic DNS mapping changes";
requiredBy = cfg.restartOnChange;
# before = cfg.restartOnChange;
};
systemd.paths.dyn-dns-changed = {
wantedBy = cfg.restartOnChange;
wants = [ "dyn-dns-exists.target" ];
after = [ "dyn-dns-exists.target" ];
pathConfig.PathChanged = [ cfg.ipPath ];
};
systemd.services.dyn-dns-changed = {
description = "called when dynamic DNS address changes, to restart all listeners";
description = "dynamic DNS change notifier";
serviceConfig.Type = "oneshot";
serviceConfig.ExecStart = "${lib.getExe' pkgs.systemd "systemctl"} restart dyn-dns-valid.target";
serviceConfig.ExecStart = "${lib.getExe' pkgs.systemd "systemctl"} restart dyn-dns-events.target";
};
};
}