From 95656c9cff3f24e05f400d0bee5daedd2d30ad82 Mon Sep 17 00:00:00 2001
From: EuAndreh <eu@euandre.org>
Date: Wed, 23 Sep 2020 15:35:53 -0300
Subject: Enable automatic GC of NixOS

---
 TODOs.org             |  4 +++-
 vps-configuration.nix | 12 ++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/TODOs.org b/TODOs.org
index a8ea8c5..a7ed8f7 100644
--- a/TODOs.org
+++ b/TODOs.org
@@ -27,7 +27,9 @@ No XMPP, for now, I'm stick with Matrix and their puppeting bridges.
 ** CANCELLED Fix conversejs login
 CLOSED: [2020-09-22 mar. 18:56]
 ** DOING Terraform restore from backup when provisioning
-** DOING cron: borg, PostgreSQL backup and NixOS update and collect gargabe
+** DONE cron: borg, PostgreSQL backup and NixOS update and collect gargabe
+CLOSED: [2020-09-23 mer. 15:34]
+- State "DONE"       from "DOING"      [2020-09-23 mer. 15:35]
 ** DOING snapshot with swap: nixos-rebuild switch takes too much memory
 Adding swap memory maybe be a lot slower, but allows me to stay inside the 512MB memory server plan
 ** DONE Configure PostgreSQL permissions correctly
diff --git a/vps-configuration.nix b/vps-configuration.nix
index 4897b95..5c7d790 100644
--- a/vps-configuration.nix
+++ b/vps-configuration.nix
@@ -66,6 +66,18 @@ in {
     interfaces.ens3.useDHCP = true;
   };
 
+  nix = {
+    gc = {
+      automatic = true;
+      options = "--delete-older-than 7d";
+    };
+    # min-free 1G
+    extraOptions = ''
+      min-free = ${toString (1024 * 1024 * 1024)}
+    '';
+  };
+
+
   environment = {
     systemPackages = with pkgs; [
       vim
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