From f129fe34bf7fb114740f8d088e400bd74a97409f Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Mon, 23 Apr 2018 16:06:25 +0200
Subject: Jitter backups

---
 custom/borgbackup.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/custom/borgbackup.nix b/custom/borgbackup.nix
index dc40c652..129b5e2e 100644
--- a/custom/borgbackup.nix
+++ b/custom/borgbackup.nix
@@ -46,6 +46,11 @@ let
         default = "6h";
       };
 
+      jitter = mkOption {
+        type = with types; nullOr str;
+        default = "6h";
+      };
+
       lock = mkOption {
         type = types.nullOr types.str;
         default = "backup";
@@ -102,6 +107,7 @@ in {
         Persistent = false;
         OnBootSec = tCfg.interval;
         OnUnitInactiveSec = tCfg.interval;
+        RandomizedDelaySec = mkIf (tCfg.jitter != null) tCfg.jitter;
       };
     }) (flatten (mapAttrsToList (target: tCfg: map (path: { inherit target path tCfg; }) tCfg.paths) cfg.targets)))) // (mapAttrs' (target: tCfg: nameValuePair "borgbackup-prune-${target}" {
       enable = tCfg.prune != {};
@@ -112,6 +118,7 @@ in {
         Persistent = false;
         OnBootSec = tCfg.interval;
         OnUnitInactiveSec = tCfg.interval;
+        RandomizedDelaySec = mkIf (tCfg.jitter != null) tCfg.jitter;
       };
     }) cfg.targets);
 
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