From 2f90fe09524736edeb430afb90388fe55bc64dc7 Mon Sep 17 00:00:00 2001
From: Adithya Nair <adtya@adtya.xyz>
Date: Sun, 21 Jul 2024 19:10:11 +0530
Subject: [PATCH] all: setup promtail

---
 hosts/layne/services/apps/default.nix |  1 +
 hosts/rico0/services/apps/default.nix |  1 +
 hosts/rico1/services/apps/default.nix |  1 +
 hosts/rico2/services/apps/default.nix |  1 +
 hosts/shared/promtail.nix             | 46 +++++++++++++++++++++++++++
 hosts/wynne/services/apps/default.nix |  1 +
 6 files changed, 51 insertions(+)
 create mode 100644 hosts/shared/promtail.nix

diff --git a/hosts/layne/services/apps/default.nix b/hosts/layne/services/apps/default.nix
index 61f7a58..7e0599e 100644
--- a/hosts/layne/services/apps/default.nix
+++ b/hosts/layne/services/apps/default.nix
@@ -2,5 +2,6 @@ _: {
   imports = [
     ./transmission.nix
     ../../../shared/prometheus-exporters.nix
+    ../../../shared/promtail.nix
   ];
 }
diff --git a/hosts/rico0/services/apps/default.nix b/hosts/rico0/services/apps/default.nix
index df18b22..e90c990 100644
--- a/hosts/rico0/services/apps/default.nix
+++ b/hosts/rico0/services/apps/default.nix
@@ -5,5 +5,6 @@ _: {
     ./loki.nix
     ./prometheus.nix
     ../../../shared/prometheus-exporters.nix
+    ../../../shared/promtail.nix
   ];
 }
diff --git a/hosts/rico1/services/apps/default.nix b/hosts/rico1/services/apps/default.nix
index b262054..fcab3d5 100644
--- a/hosts/rico1/services/apps/default.nix
+++ b/hosts/rico1/services/apps/default.nix
@@ -4,5 +4,6 @@ _: {
     ./proofs.nix
     ./wiki.nix
     ../../../shared/prometheus-exporters.nix
+    ../../../shared/promtail.nix
   ];
 }
diff --git a/hosts/rico2/services/apps/default.nix b/hosts/rico2/services/apps/default.nix
index cf17cbe..b3afbb0 100644
--- a/hosts/rico2/services/apps/default.nix
+++ b/hosts/rico2/services/apps/default.nix
@@ -1,5 +1,6 @@
 _: {
   imports = [
     ../../../shared/prometheus-exporters.nix
+    ../../../shared/promtail.nix
   ];
 }
diff --git a/hosts/shared/promtail.nix b/hosts/shared/promtail.nix
new file mode 100644
index 0000000..d76714e
--- /dev/null
+++ b/hosts/shared/promtail.nix
@@ -0,0 +1,46 @@
+{ config, ... }: {
+  services = {
+    caddy = {
+      virtualHosts."promtail.${config.networking.hostName}.labs.adtya.xyz" = {
+        extraConfig = ''
+          reverse_proxy 127.0.0.1:9080
+          tls /persist/secrets/caddy/certs/default.crt /persist/secrets/caddy/certs/default.key
+        '';
+      };
+    };
+    promtail = {
+      enable = true;
+      configuration = {
+        server = {
+          http_listen_address = "127.0.0.1";
+          http_listen_port = 9080;
+        };
+        clients = [
+          {
+            url = "https://loki.labs.adtya.xyz/api/v1/push";
+            tenant_id = 1;
+          }
+        ];
+        positions = { filename = "/tmp/promtail-positions.yaml"; };
+        scrape_configs = [
+          {
+            job_name = "journal";
+            journal = {
+              json = false;
+              max_age = "12h";
+              path = "/var/log/journal";
+              matches = "_TRANSPORT=kernel";
+              labels = { job = "systemd-journal"; host = "${config.networking.hostName}"; };
+            };
+            relabel_config = [
+              {
+                source_labels = [ "__journal__systemd_unit" ];
+                target_label = "unit";
+              }
+            ];
+          }
+        ];
+      };
+    };
+  };
+}
diff --git a/hosts/wynne/services/apps/default.nix b/hosts/wynne/services/apps/default.nix
index aab1813..d0b5a39 100644
--- a/hosts/wynne/services/apps/default.nix
+++ b/hosts/wynne/services/apps/default.nix
@@ -4,5 +4,6 @@ _: {
     ./acomputer.lol.nix
     ./postgresql.nix
     ../../../shared/prometheus-exporters.nix
+    ../../../shared/promtail.nix
   ];
 }