From 7927cc183f90837a1752a68a6223b3d66de208e1 Mon Sep 17 00:00:00 2001
From: coolneng <akasroua@gmail.com>
Date: Sun, 29 Mar 2020 06:21:19 +0200
Subject: [PATCH] Avoid packages rebuilds and decrease ZFS ARC cache

---
 configuration.nix      | 25 ++++++++++++++++---------
 modules/datasync.nix   |  1 +
 modules/devops.nix     |  5 +++++
 modules/networking.nix |  2 ++
 modules/webstack.nix   |  4 +---
 5 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/configuration.nix b/configuration.nix
index 64a93d2..c96045a 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -6,7 +6,7 @@
   boot.loader.generic-extlinux-compatible.enable = true;
 
   # A bunch of boot parameters needed for optimal runtime on RPi 3B
-  boot.kernelParams = ["cma=32M"];
+  boot.kernelParams = ["cma=32M" "zfs.zfs_arc_max=12884901888"];
   boot.loader.raspberryPi = {
     enable = true;
     version = 3;
@@ -54,10 +54,12 @@
   time.timeZone = "Europe/Brussels";
   services.timesyncd.enable = true;
 
-  # Enable zfs support
+  # Enable ZFS support
   networking.hostId = "bb26c304";
-  boot.supportedFilesystems = [ "zfs" ];
-  boot.zfs.extraPools = [ "vault" ];
+  boot = {
+    supportedFilesystems = [ "zfs" ];
+    zfs.extraPools = [ "vault" ];
+  };
 
   # Scrub zpool monthly
   services.zfs.autoScrub = {
@@ -71,11 +73,16 @@
     allowReboot = true;
   };
 
-  # Run Nix garbage collector daily
-  nix.gc = {
-    automatic = true;
-    dates = "03:15";
-    options = "--delete-older-than 14d";
+  # Run Nix garbage collector, while avoiding compiling
+  nix = {
+    gc = {
+      automatic = true;
+      options = "--delete-older-than 30d";
+    };
+    extraOptions = ''
+      keep-outputs = true
+      gc-keep-outputs = true
+    '';
   };
 
   # Configure fish shell
diff --git a/modules/datasync.nix b/modules/datasync.nix
index 1714028..127e7a5 100644
--- a/modules/datasync.nix
+++ b/modules/datasync.nix
@@ -53,6 +53,7 @@
           id = "cjhmu-avy9v";
           type = "receiveonly";
           path = "/vault/syncthing/Projects";
+          watch = false;
         };
       };
     };
diff --git a/modules/devops.nix b/modules/devops.nix
index e030ed6..c930cb9 100644
--- a/modules/devops.nix
+++ b/modules/devops.nix
@@ -1,6 +1,11 @@
 # Software development configuration
 { config, pkgs, lib, ... }:
 {
+
+  environment.systemPackages = with pkgs; [
+    gitea
+  ];
+
   # Gitea setup with daily backup
   services.gitea = {
     enable = true;
diff --git a/modules/networking.nix b/modules/networking.nix
index 14f19fa..8bef1e8 100644
--- a/modules/networking.nix
+++ b/modules/networking.nix
@@ -6,6 +6,8 @@
 {
 
   environment.systemPackages = with pkgs; [
+    avahi
+    ddclient
     wireguard
     wireguard-tools
   ];
diff --git a/modules/webstack.nix b/modules/webstack.nix
index 3edbf39..2936eb8 100644
--- a/modules/webstack.nix
+++ b/modules/webstack.nix
@@ -133,8 +133,6 @@
     };
   };
 
-
   # Restart nginx after
-  systemd.services.nginx.after = [ "gitea.service" "syncthing.service" "miniflux.service" ];
-
+  systemd.services.nginx.after = [ "gitea.service" "syncthing.service" "miniflux.service" "radicale.service" ];
 }