From 9245fa679756874af953bf9bef147dfd2703f10a Mon Sep 17 00:00:00 2001
From: teutat3s <teutates@mailbox.org>
Date: Sun, 12 May 2024 22:17:58 +0200
Subject: [PATCH] alertmanager: finalize init

---
 modules/grafana/default.nix        |  1 +
 modules/prometheus/alert-rules.nix | 42 +++++++++++++++++-------------
 modules/prometheus/default.nix     | 12 +++++----
 terraform/dns.tf                   |  4 +--
 4 files changed, 34 insertions(+), 25 deletions(-)

diff --git a/modules/grafana/default.nix b/modules/grafana/default.nix
index e8fa7181..be124743 100644
--- a/modules/grafana/default.nix
+++ b/modules/grafana/default.nix
@@ -15,6 +15,7 @@
     file = "${flake.self}/secrets/grafana-smtp-password.age";
     mode = "644";
     owner = "grafana";
+    group = "prometheus";
   };
   age.secrets.grafana-keycloak-client-secret = {
     file = "${flake.self}/secrets/grafana-keycloak-client-secret.age";
diff --git a/modules/prometheus/alert-rules.nix b/modules/prometheus/alert-rules.nix
index 23f66ab5..fb832a0b 100644
--- a/modules/prometheus/alert-rules.nix
+++ b/modules/prometheus/alert-rules.nix
@@ -51,12 +51,18 @@ lib.mapAttrsToList
     #   description = ''{{ $labels.instance }} {{ $labels.job }} {{ $labels.path }} has been lagging by more than 1MB for more than 15m.'';
     # };
 
-    filesystem_full_80percent = {
+    filesystem_root_full_80percent = {
       condition = ''100 - ((node_filesystem_avail_bytes{fstype!="rootfs",mountpoint="/"} * 100) / node_filesystem_size_bytes{fstype!="rootfs",mountpoint="/"}) > 80'';
       time = "10m";
       description = "{{$labels.instance}} device {{$labels.device}} on {{$labels.mountpoint}} got less than 20% space left on its filesystem.";
     };
 
+    filesystem_data_full_80percent = {
+      condition = ''100 - ((node_filesystem_avail_bytes{fstype!="rootfs",mountpoint="/var/lib"} * 100) / node_filesystem_size_bytes{fstype!="rootfs",mountpoint="/var/lib"}) > 80'';
+      time = "10m";
+      description = "{{$labels.instance}} device {{$labels.device}} on {{$labels.mountpoint}} got less than 20% space left on its filesystem.";
+    };
+
     # filesystem_inodes_full = {
     #   condition = ''disk_inodes_free / disk_inodes_total < 0.10'';
     #   time = "10m";
@@ -102,11 +108,11 @@ lib.mapAttrsToList
     #     "homeassistant notification {{$labels.entity}} ({{$labels.friendly_name}}): {{$value}}";
     # };
 
-    swap_using_20percent = {
-      condition = "node_memory_SwapTotal_bytes - (node_memory_SwapCached_bytes + node_memory_SwapFree_bytes) > node_memory_SwapTotal_bytes * 0.2";
-      time = "30m";
-      description = "{{$labels.instance}} is using 20% of its swap space for at least 30 minutes.";
-    };
+    #swap_using_20percent = {
+    #  condition = "node_memory_SwapTotal_bytes - (node_memory_SwapCached_bytes + node_memory_SwapFree_bytes) > node_memory_SwapTotal_bytes * 0.2";
+    #  time = "30m";
+    #  description = "{{$labels.instance}} is using 20% of its swap space for at least 30 minutes.";
+    #};
 
     systemd_service_failed = {
       condition = ''node_systemd_unit_state{state="failed"} == 1'';
@@ -118,10 +124,10 @@ lib.mapAttrsToList
       description = "{{$labels.instance}} not backed up for more than 24 hours. ({{$value}})";
     };
 
-    host_down = {
-      condition = ''up{job="node-stats", instance!~"ahorn.wireguard:9100|kartoffel.wireguard:9100|mega.wireguard:9100"} == 0'';
-      description = "{{$labels.instance}} is down!";
-    };
+    #host_down = {
+    #  condition = ''up{job="node-stats", instance!~"ahorn.wireguard:9100|kartoffel.wireguard:9100|mega.wireguard:9100"} == 0'';
+    #  description = "{{$labels.instance}} is down!";
+    #};
 
     # service_not_running = {
     #   condition = ''systemd_units_active_code{name=~"teamspeak3-server.service|tt-rss.service", sub!="running"}'';
@@ -166,10 +172,10 @@ lib.mapAttrsToList
       description = "{{$labels.instance}}: ping probe from {{$labels.source}} is encountering high latency!";
       };
     */
-    http_status = {
-      condition = ''probe_http_status_code{instance!~"https://megaclan3000.de"} != 200'';
-      description = "http request failed from {{$labels.instance}}: {{$labels.result}}!";
-    };
+    #http_status = {
+    #  condition = ''probe_http_status_code{instance!~"https://pub.solar"} != 200'';
+    #  description = "http request failed from {{$labels.instance}}: {{$labels.result}}!";
+    #};
     /*
       http_match_failed = {
       condition = "http_response_response_string_match == 0";
@@ -192,10 +198,10 @@ lib.mapAttrsToList
       description = "{{$labels.instance}}: healtcheck {{$labels.job}} fails!";
       };
     */
-    cert_expiry = {
-      condition = "(probe_ssl_earliest_cert_expiry - time())/(3600*24) < 30";
-      description = "{{$labels.instance}}: The TLS certificate will expire in less than 30 days: {{$value}}s";
-    };
+    #cert_expiry = {
+    #  condition = "(probe_ssl_earliest_cert_expiry - time())/(3600*24) < 30";
+    #  description = "{{$labels.instance}}: The TLS certificate will expire in less than 30 days: {{$value}}s";
+    #};
 
     # ignore devices that disabled S.M.A.R.T (example if attached via USB)
 
diff --git a/modules/prometheus/default.nix b/modules/prometheus/default.nix
index 04a9e384..c58c48b2 100644
--- a/modules/prometheus/default.nix
+++ b/modules/prometheus/default.nix
@@ -17,6 +17,8 @@
       output discard
     '';
     extraConfig = ''
+      bind 10.7.6.2 fd00:fae:fae:fae:fae:2::
+      tls internal
       reverse_proxy :${toString config.services.prometheus.alertmanager.port}
     '';
   };
@@ -101,7 +103,7 @@
     alertmanager = {
       enable = true;
       # port = 9093; # Default
-      webExternalUrl = "https://alerts.pub.solar"; # TODO use a proper url?
+      webExternalUrl = "https://alerts.pub.solar";
       # environmentFile = "${config.age.secrets.nachtigall-alertmanager-envfile.path}";
       configuration = {
 
@@ -120,11 +122,11 @@
             email_configs = [
               {
                 send_resolved = true;
-                to = "TODO";
+                to = "admins@pub.solar";
                 from = "alerts@pub.solar";
-                smarthost = "TODO";
-                auth_username = "TODO";
-                auth_password_file = "${config.age.secrets.nachtigall-alertmanager-smtp-password.path}";
+                smarthost = "mail.greenbaum.zone:465";
+                auth_username = "admins@pub.solar";
+                auth_password_file = "${config.age.secrets.grafana-smtp-password.path}";
                 require_tls = true;
               }
             ];
diff --git a/terraform/dns.tf b/terraform/dns.tf
index a35978cf..039dd868 100644
--- a/terraform/dns.tf
+++ b/terraform/dns.tf
@@ -21,8 +21,8 @@ resource "namecheap_domain_records" "pub-solar" {
   }
   record {
     hostname = "alerts"
-    type     = "CNAME"
-    address  = "flora-6.pub.solar."
+    type     = "A"
+    address  = "10.7.6.2"
   }
   record {
     hostname = "git"