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|
{
config,
pkgs,
lib,
...
}:
let
inherit (lib) mkOption types;
inherit (pkgs) tailscale;
cfg = config.foundation;
tailnet-wait-for-ip = pkgs.writeShellScriptBin "tailnet-wait-for-ip.sh" ''
echo "waiting for tailscale to acquire tailnet ip address..."
while ! ${lib.getExe tailscale} ip -1; do
echo "tailnet ip not yet available... sleeping for 1 second."
sleep 1
done
ip=$(${lib.getExe tailscale} ip -1)
echo "acquired tailnet address! ip: $ip"
exit 0
'';
in
{
options.foundation = {
tailnetServices = mkOption {
type = with types; listOf str;
default = [ ];
example = [ "nginx" ];
description = ''
services that depend on the tailnet.
will be launched only after tailscaled.service
is fully up and online.
'';
};
};
config =
let
tailnetWaitOnlineService = {
enable = true;
after = [
"tailscaled.service"
"network.target"
];
# kill service if tailscaled dies.
bindsTo = [ "tailscaled.service" ];
serviceConfig = {
# unit is marked as active after script exits.
Type = "oneshot";
RemainAfterExit = true;
# consider connection failed after 3 minutes.
TimeoutStartSec = "3m";
ExecStart = "${tailnet-wait-for-ip}/bin/tailnet-wait-for-ip.sh";
};
description = ''
wait for tailscale device to be online and ready
'';
};
tailnetOnlineTarget = {
enable = true;
after = [
"tailnet-wait-online.service"
"tailscaled.service"
];
requires = [ "tailnet-wait-online.service" ];
bindsTo = [ "tailscaled.service" ];
description = "tailnet is online";
};
tailnetDependantUnit = {
after = [ "tailnet-online.target" ];
requires = [ "tailnet-online.target" ];
};
tailnetDependantServices = lib.genAttrs cfg.tailnetServices (x: tailnetDependantUnit);
in
{
systemd = {
services = {
"tailnet-wait-online" = tailnetWaitOnlineService;
} // tailnetDependantServices;
targets = {
"tailnet-online" = tailnetOnlineTarget;
};
};
};
}
|
