Use generate + command instead of subprocess, focus on active value only and add instance label tune-redpanda

1 files changed, 21 insertions, 51 deletions

diff --git a/host/Rory-nginx/services/redpanda/systemd-services.nix b/host/Rory-nginx/services/redpanda/systemd-services.nix

index bb13e53..58e8ed0 100644
--- a/host/Rory-nginx/services/redpanda/systemd-services.nix
+++ b/host/Rory-nginx/services/redpanda/systemd-services.nix
@@ -9,16 +9,18 @@
         address = "127.0.0.1:5100";
       };
       input = {
-        label = "";
-        subprocess = {
-          name = "${pkgs.systemd}/bin/systemctl";
-          args = [
-            "-ojson"
-            "--recursive"
-          ];
-          restart_on_exit = true;
-          max_buffer = 1024*512;
+        generate = {
+          interval = "@every 5m";
+          mapping = "root = \"\""; # Empty string as we do not need to pipe anything to stdin
         };
+        processors = [
+          {
+            command = {
+              name = "systemctl";
+              args_mapping = "[ \"-ojson\", \"--recursive\" ]";
+            };
+          }
+        ];
       };
       pipeline = {
         processors = [
@@ -26,62 +28,30 @@
           {
             mapping = ''
               root = this
-              if this.loaded == "loaded" {
-                root.loaded_value = 1.0
-              } else {
-                root.loaded_value = 0.0
-              }
-              if this.active == "active" {
-                root.active_value = 1.0
-              } else {
-                root.active_value = 0.0
-              }
-              if this.sub == "active" {
-                root.sub_value = 1.0
-              } else {
-                root.sub_value = 0.0
-              }
+
+              root.active_value = match {
+                this.active == "active" => 0.0,
+                this.active == "reloading" => 1.0,
+                this.active == "inactive" => 2.0,
+                this.active == "failed" => 3.0,
+                this.active == "activating"  => 4.0,
+                this.active == "deactivating" => 5.0,
+                _ => 0.5,
             '';
           }
           {
             metric = {
               name = "systemd_service_status";
               type = "gauge";
-              value = "\${!json(\"loaded_value\")}";
-              labels = {
-                field = "loaded";
-                service = "\${!json(\"unit\")}";
-                description = "\${!json(\"description\")}";
-              };
-            };
-          }
-          {
-            metric = {
-              name = "systemd_service_status";
-              type = "gauge";
               value = "\${!json(\"active_value\")}";
               labels = {
                 field = "active";
                 service = "\${!json(\"unit\")}";
                 description = "\${!json(\"description\")}";
+                instance = config.networking.hostName;
               };
             };
           }
-          {
-            metric = {
-              name = "systemd_service_status";
-              type = "gauge";
-              value = "\${!json(\"sub_value\")}";
-              labels = {
-                field = "sub";
-                service = "\${!json(\"unit\")}";
-                description = "\${!json(\"description\")}";
-              };
-            };
-          }
-          {
-            sleep.duration = "5s";
-          }
         ];
       };
       metrics.prometheus = { };