From 7db769a19ad248a19642b5f1a22e9027cde8901a Mon Sep 17 00:00:00 2001
From: Aaron Bieber <aaron@bolddaemon.com>
Date: Wed, 29 Mar 2023 09:00:55 -0600
Subject: [PATCH] monitoring: build fs list from config

---
 monitoring/default.nix | 12 ++++++++++--
 monitoring/monitrc     |  3 ---
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/monitoring/default.nix b/monitoring/default.nix
index f0d48c3..be10faf 100644
--- a/monitoring/default.nix
+++ b/monitoring/default.nix
@@ -1,6 +1,9 @@
 { config, ... }:
+let
+  inherit (builtins)
+    readFile concatStringsSep attrValues mapAttrs replaceStrings;
 
-{
+in {
   config = {
     sops.secrets = {
       monit_cfg = {
@@ -11,7 +14,12 @@
     };
     services.monit = {
       enable = true;
-      config = builtins.readFile ./monitrc;
+      config = readFile ./monitrc + (concatStringsSep "\n" (attrValues (mapAttrs
+        (f: _: ''
+          check filesystem ${replaceStrings [ "/" ] [ "_" ] f} with path ${f}
+             if space usage > 90% then alert
+             if inode usage > 90% then alert
+        '') config.fileSystems)));
     };
   };
 }
diff --git a/monitoring/monitrc b/monitoring/monitrc
index 815a5db..7dcb74d 100644
--- a/monitoring/monitrc
+++ b/monitoring/monitrc
@@ -20,6 +20,3 @@ check system $HOST
     if cpu usage (wait) > 80% for 2 cycles then alert
     if cpu usage > 200% for 4 cycles then alert
 
-check filesystem rootfs with path /
-    if space usage > 90% then alert
-    if inode usage > 90% then alert