From b2bebd7cd5446c197ce6b3e8a38ef3686ae5ace0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Milan=20P=C3=A4ssler?= <milan@petabyte.dev>
Date: Fri, 12 Mar 2021 11:11:16 +0100
Subject: [PATCH] nixos/prometheus-jitsi-exporter: init

---
 .../monitoring/prometheus/exporters.nix       |  1 +
 .../monitoring/prometheus/exporters/jitsi.nix | 40 +++++++++++++++++++
 nixos/tests/prometheus-exporters.nix          | 23 +++++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 nixos/modules/services/monitoring/prometheus/exporters/jitsi.nix

diff --git a/nixos/modules/services/monitoring/prometheus/exporters.nix b/nixos/modules/services/monitoring/prometheus/exporters.nix
index 940f28189371..fc5cee70fd9a 100644
--- a/nixos/modules/services/monitoring/prometheus/exporters.nix
+++ b/nixos/modules/services/monitoring/prometheus/exporters.nix
@@ -30,6 +30,7 @@ let
     "dovecot"
     "fritzbox"
     "json"
+    "jitsi"
     "keylight"
     "lnd"
     "mail"
diff --git a/nixos/modules/services/monitoring/prometheus/exporters/jitsi.nix b/nixos/modules/services/monitoring/prometheus/exporters/jitsi.nix
new file mode 100644
index 000000000000..c93a8f98e552
--- /dev/null
+++ b/nixos/modules/services/monitoring/prometheus/exporters/jitsi.nix
@@ -0,0 +1,40 @@
+{ config, lib, pkgs, options }:
+
+with lib;
+
+let
+  cfg = config.services.prometheus.exporters.jitsi;
+in
+{
+  port = 9700;
+  extraOpts = {
+    url = mkOption {
+      type = types.str;
+      default = "http://localhost:8080/colibri/stats";
+      description = ''
+        Jitsi Videobridge metrics URL to monitor.
+        This is usually /colibri/stats on port 8080 of the jitsi videobridge host.
+      '';
+    };
+    interval = mkOption {
+      type = types.str;
+      default = "30s";
+      example = "1min";
+      description = ''
+        How often to scrape new data
+      '';
+    };
+  };
+  serviceOpts = {
+    serviceConfig = {
+      ExecStart = ''
+        ${pkgs.prometheus-jitsi-exporter}/bin/jitsiexporter \
+          -url ${escapeShellArg cfg.url} \
+          -host ${cfg.listenAddress} \
+          -port ${toString cfg.port} \
+          -interval ${toString cfg.interval} \
+          ${concatStringsSep " \\\n  " cfg.extraFlags}
+      '';
+    };
+  };
+}
diff --git a/nixos/tests/prometheus-exporters.nix b/nixos/tests/prometheus-exporters.nix
index 89d17c9de8c0..9625aa4d274d 100644
--- a/nixos/tests/prometheus-exporters.nix
+++ b/nixos/tests/prometheus-exporters.nix
@@ -218,6 +218,29 @@ let
       '';
     };
 
+    jitsi = {
+      exporterConfig = {
+        enable = true;
+      };
+      metricProvider = {
+        systemd.services.prometheus-jitsi-exporter.after = [ "jitsi-videobridge2.service" ];
+        services.jitsi-videobridge = {
+          enable = true;
+          apis = [ "colibri" "rest" ];
+        };
+      };
+      exporterTest = ''
+        wait_for_unit("jitsi-videobridge2.service")
+        wait_for_open_port(8080)
+        wait_for_unit("prometheus-jitsi-exporter.service")
+        wait_for_open_port(9700)
+        wait_until_succeeds(
+            'journalctl -eu prometheus-jitsi-exporter.service -o cat | grep -q "key=participants"'
+        )
+        succeed("curl -sSf 'localhost:9700/metrics' | grep -q 'jitsi_participants 0'")
+      '';
+    };
+
     json = {
       exporterConfig = {
         enable = true;