Measure stats-data

lib/pleroma/application.ex

@@ -64,7 +64,6 @@ def start(_type, _args) do
         Config.TransferTask,
         Pleroma.Emoji,
         Pleroma.Web.Plugs.RateLimiter.Supervisor,
-        Pleroma.Web.Telemetry,
         {Task.Supervisor, name: Pleroma.TaskSupervisor}
       ] ++
         cachex_children() ++
@@ -74,7 +73,8 @@ def start(_type, _args) do
           Pleroma.JobQueueMonitor,
           {Majic.Pool, [name: Pleroma.MajicPool, pool_size: Config.get([:majic_pool, :size], 2)]},
           {Oban, Config.get(Oban)},
-          Pleroma.Web.Endpoint
+          Pleroma.Web.Endpoint,
+          Pleroma.Web.Telemetry
         ] ++
         elasticsearch_children() ++
         task_children(@mix_env) ++

lib/pleroma/web/telemetry.ex

@@ -1,6 +1,7 @@
 defmodule Pleroma.Web.Telemetry do
   use Supervisor
   import Telemetry.Metrics
+  alias Pleroma.Stats
 
   def start_link(arg) do
     Supervisor.start_link(__MODULE__, arg, name: __MODULE__)
@@ -103,11 +104,23 @@ def metrics do
         reporter_options: [
           buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10]
         ]
-      )
+      ),
+      last_value("pleroma.local_users.total"),
+      last_value("pleroma.domains.total"),
+      last_value("pleroma.local_statuses.total")
     ]
   end
 
   defp periodic_measurements do
-    []
+    [
+      {__MODULE__, :instance_stats, []}
+    ]
+  end
+
+  def instance_stats do
+    stats = Stats.get_stats()
+    :telemetry.execute([:pleroma, :local_users], %{total: stats.user_count}, %{})
+    :telemetry.execute([:pleroma, :domains], %{total: stats.domain_count}, %{})
+    :telemetry.execute([:pleroma, :local_statuses], %{total: stats.status_count}, %{})
   end
 end