From ddad276bf357c7fa19850181f17cb92464c9a11f Mon Sep 17 00:00:00 2001
From: Mel <mel@rnrd.eu>
Date: Sun, 6 Sep 2026 21:42:24 +0200
Subject: Service should survive transient failures, retries, and ordering

Signed-off-by: Mel <mel@rnrd.eu>
---
 module.nix | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

(limited to 'module.nix')

diff --git a/module.nix b/module.nix
index b227085..de2f20d 100644
--- a/module.nix
+++ b/module.nix
@@ -72,12 +72,23 @@ in
   config = mkIf cfg.enable {
     systemd.services.ddnnss = {
       description = "ddnnss dynamic dns update cycle";
-      after = [ "network-online.target" ];
+      after = [
+        "network-online.target"
+        "nss-lookup.target"
+      ];
       wants = [ "network-online.target" ];
 
+      unitConfig = {
+        # retry on transient failure
+        StartLimitIntervalSec = "10min";
+        StartLimitBurst = 3;
+      };
+
       serviceConfig = {
         Type = "oneshot";
         DynamicUser = true;
+        Restart = "on-failure";
+        RestartSec = "30s";
         LoadCredential = lib.mapAttrsToList
           (name: path: "${name}:${path}") cfg.credentials;
         ExecStart = "${getExe ddnnss} -config ${configFile}";
@@ -88,7 +99,7 @@ in
       wantedBy = [ "timers.target" ];
       timerConfig = {
         # wait 2 minutes from the start, with 30 second jitter.
-        OnBootSec = "2min";
+        OnActiveSec = "2min";
         RandomizedDelaySec = "30s";
         OnUnitActiveSec = cfg.interval;
       };
-- 
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