hosts/monitoring-3: alert for hosts that just booted

hosts/monitoring-3/rules.yml

@@ -24,3 +24,10 @@ groups:
     annotations:
       summary: "Storage for backup is nearly full"
       description: "Storage for backups is nearly full"
+  - alert: InstanceJustBooted
+    expr: time() - node_boot_time_seconds{job="node-exporter"} <= 300
+    labels:
+      severity: warning
+    annotations:
+      summary: "Uptime of {{ $labels.instance }} less than 5 min"
+      description: "{{ $labels.instance }} just booted"

pkgs/overlay.nix

@@ -8,13 +8,4 @@ self: super: {
   wetter = self.python3.pkgs.callPackage ./wetter {
     inherit (self) pkgconfig libsass;
   };
-  # The current version in nixpkgs is b0rked, but no new release is made yet
-  prometheus-xmpp-alerts = super.prometheus-xmpp-alerts.overrideAttrs (oldAttrs: {
-    version = "master";
-    src = fetchGit {
-      url = "https://github.com/jelmer/prometheus-xmpp-alerts.git";
-      ref = "master";
-      rev = "0a48e172625de74b7c3ad3a1bd38f687601c207a";
-    };
-  });
 }