move monitoring setup to modules

3 files changed, 152 insertions, 0 deletions

diff --git a/modules/nixos/server/services/default.nix b/modules/nixos/server/services/default.nix
index 68271b1..eb24d04 100644
--- a/modules/nixos/server/services/default.nix
+++ b/modules/nixos/server/services/default.nix
@@ -1,5 +1,7 @@
 _: {
   imports = [
     ./hercules.nix
+    ./loki.nix
+    ./promtail.nix
   ];
 }
diff --git a/modules/nixos/server/services/loki.nix b/modules/nixos/server/services/loki.nix
new file mode 100644
index 0000000..1a42637
--- /dev/null
+++ b/modules/nixos/server/services/loki.nix
@@ -0,0 +1,94 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.getchoo.server.services.loki;
+  inherit (lib) mkEnableOption mkIf mkOption types;
+in {
+  options.getchoo.server.services.loki = {
+    enable = mkEnableOption "enable loki";
+    port = mkOption {
+      type = types.port;
+      default = 3030;
+      description = "port for loki";
+    };
+  };
+
+  config.services.loki = mkIf cfg.enable {
+    enable = true;
+    configuration = {
+      server.http_listen_port = cfg.port;
+      auth_enabled = false;
+
+      ingester = {
+        lifecycler = {
+          address = "127.0.0.1";
+          ring = {
+            kvstore = {
+              store = "inmemory";
+            };
+            replication_factor = 1;
+          };
+        };
+        chunk_idle_period = "1h";
+        max_chunk_age = "1h";
+        chunk_target_size = 999999;
+        chunk_retain_period = "30s";
+        max_transfer_retries = 0;
+      };
+
+      schema_config = {
+        configs = [
+          {
+            from = "2022-06-06";
+            store = "boltdb-shipper";
+            object_store = "filesystem";
+            schema = "v11";
+            index = {
+              prefix = "index_";
+              period = "24h";
+            };
+          }
+        ];
+      };
+
+      storage_config = {
+        boltdb_shipper = {
+          active_index_directory = "/var/lib/loki/boltdb-shipper-active";
+          cache_location = "/var/lib/loki/boltdb-shipper-cache";
+          cache_ttl = "24h";
+          shared_store = "filesystem";
+        };
+
+        filesystem = {
+          directory = "/var/lib/loki/chunks";
+        };
+      };
+
+      limits_config = {
+        reject_old_samples = true;
+        reject_old_samples_max_age = "168h";
+      };
+
+      chunk_store_config = {
+        max_look_back_period = "0s";
+      };
+
+      table_manager = {
+        retention_deletes_enabled = false;
+        retention_period = "0s";
+      };
+
+      compactor = {
+        working_directory = "/var/lib/loki";
+        shared_store = "filesystem";
+        compactor_ring = {
+          kvstore = {
+            store = "inmemory";
+          };
+        };
+      };
+    };
+  };
+}
diff --git a/modules/nixos/server/services/promtail.nix b/modules/nixos/server/services/promtail.nix
new file mode 100644
index 0000000..73a8de2
--- /dev/null
+++ b/modules/nixos/server/services/promtail.nix
@@ -0,0 +1,56 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.getchoo.server.services.promtail;
+  inherit (lib) mkEnableOption mkIf mkOption types;
+in {
+  options.getchoo.server.services.promtail = {
+    enable = mkEnableOption "enable promtail";
+
+    port = mkOption {
+      type = types.port;
+      default = 3031;
+      description = "port for promtail";
+    };
+
+    clients = mkOption {
+      type = types.listOf types.attrs;
+      default = [{}];
+      description = "clients for promtail";
+    };
+  };
+
+  config.services.promtail = mkIf cfg.enable {
+    enable = true;
+    configuration = {
+      server = {
+        http_listen_port = cfg.port;
+        grpc_listen_port = 0;
+      };
+      positions = {
+        filename = "/tmp/positions.yaml";
+      };
+      inherit (cfg) clients;
+      scrape_configs = [
+        {
+          job_name = "journal";
+          journal = {
+            max_age = "12h";
+            labels = {
+              job = "systemd-journal";
+              host = "${config.networking.hostName}";
+            };
+          };
+          relabel_configs = [
+            {
+              source_labels = ["__journal__systemd_unit"];
+              target_label = "unit";
+            }
+          ];
+        }
+      ];
+    };
+  };
+}