From 4fb6c04299abb82b7a4d3f2f9fb62317800f896a Mon Sep 17 00:00:00 2001
From: James Walker <walkah@walkah.net>
Date: Mon, 10 May 2021 21:42:30 -0400
Subject: [PATCH] =?UTF-8?q?=F0=9F=93=8A=20prometheus=20setup?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 hosts/aristotle/configuration.nix | 18 +++++++++++++-
 hosts/plato/configuration.nix     | 39 +++++++++++++++++++++++++++++++
 modules/coredns/default.nix       |  1 +
 nix/sources.json                  |  6 ++---
 4 files changed, 60 insertions(+), 4 deletions(-)

diff --git a/hosts/aristotle/configuration.nix b/hosts/aristotle/configuration.nix
index 53fc7bc..8a1b1d0 100644
--- a/hosts/aristotle/configuration.nix
+++ b/hosts/aristotle/configuration.nix
@@ -32,7 +32,23 @@
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJ0mE4MyMnfd1b2nlBJT7kpZ6Vov+ILuGNfzdp5ZBNQe walkah@walkah.net"
   ];
 
-  services.tailscale.enable = true;
+  environment.systemPackages = with pkgs; [ libraspberrypi ];
+
+  services = {
+    prometheus = {
+      enable = true;
+      port = 9090;
+      exporters = {
+        node = {
+          enable = true;
+          enabledCollectors = [ "systemd" ];
+          openFirewall = true;
+          port = 9100;
+        };
+      };
+    };
+    tailscale = { enable = true; };
+  };
 
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
diff --git a/hosts/plato/configuration.nix b/hosts/plato/configuration.nix
index 89f2ce4..b6d315c 100644
--- a/hosts/plato/configuration.nix
+++ b/hosts/plato/configuration.nix
@@ -76,6 +76,45 @@
   # Or disable the firewall altogether.
   networking.firewall.enable = false;
 
+  services = {
+    grafana = {
+      enable = true;
+      domain = "plato.walkah.lab";
+      port = 2342;
+      addr = "0.0.0.0";
+    };
+    prometheus = {
+      enable = true;
+      port = 9090;
+      exporters = {
+        node = {
+          enable = true;
+          enabledCollectors = [ "systemd" ];
+          port = 9100;
+        };
+      };
+
+      scrapeConfigs = [
+        {
+          job_name = "node";
+          static_configs = [{
+            targets = [
+              "plato:9100"
+              "agent:9100"
+              "form:9100"
+              "matter:9100"
+              "purpose:9100"
+            ];
+          }];
+        }
+        {
+          job_name = "coredns";
+          static_configs = [{ targets = [ "plato:9153" ]; }];
+        }
+      ];
+    };
+  };
+
   # This value determines the NixOS release from which the default
   # settings for stateful data, like file locations and database versions
   # on your system were taken. It‘s perfectly fine and recommended to leave
diff --git a/modules/coredns/default.nix b/modules/coredns/default.nix
index f3f7599..13669b2 100644
--- a/modules/coredns/default.nix
+++ b/modules/coredns/default.nix
@@ -9,6 +9,7 @@
         errors
         cache
         dnssec
+        prometheus 0.0.0.0:9153
         forward . tls://1.1.1.1 tls://1.0.0.1 {
           tls_servername cloudflare-dns.com
         }
diff --git a/nix/sources.json b/nix/sources.json
index 414aa01..063e136 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -17,10 +17,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "55fafd9e23aa3e674a8db89013a004512ec5d2a9",
-        "sha256": "02vy0544zvh7j6azmg35az0za55m2pyczb2361w0awriz2ckbpav",
+        "rev": "1c16013bd6e94da748b41cc123c6b509a23eb440",
+        "sha256": "1m2wif0qnci0q14plbqlb95vx214pxqgw5li86lyw6hsiy7y3zfn",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/55fafd9e23aa3e674a8db89013a004512ec5d2a9.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/1c16013bd6e94da748b41cc123c6b509a23eb440.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }