feat(server): channel persists fast/medium/slow samples to metrics table

server/test/server_web/channels/host_channel_test.exs

@@ -48,8 +48,8 @@ defmodule ServerWeb.HostChannelTest do
     end
   end
 
-  describe "metric:fast event" do
-    setup %{token: token} do
+  describe "metric events persist to DB" do
+    setup %{token: token, host: host} do
       {:ok, socket} = connect(AgentSocket, %{})
 
       {:ok, _reply, joined} =
@@ -58,17 +58,63 @@ defmodule ServerWeb.HostChannelTest do
           "agent_version" => "0.1.0"
         })
 
-      %{socket: joined}
+      %{socket: joined, host: host}
     end
 
-    test "accepts metric payload and replies :ok", %{socket: socket} do
+    test "metric:fast is stored with interval=fast", %{socket: socket, host: host} do
+      ts = "2026-04-21T12:00:00.123456Z"
+
       ref =
         push(socket, "metric:fast", %{
-          "collected_at" => "2026-04-21T12:00:00Z",
+          "collected_at" => ts,
           "data" => %{"cpu_percent" => 12.3, "load1" => 0.2}
         })
 
       assert_reply ref, :ok
+
+      sample = Server.Metrics.latest_sample(host.id, "fast")
+      assert sample != nil
+      assert sample.payload == %{"cpu_percent" => 12.3, "load1" => 0.2}
+      {:ok, expected, _} = DateTime.from_iso8601(ts)
+      assert DateTime.compare(sample.collected_at, expected) == :eq
+    end
+
+    test "metric:medium is stored with interval=medium", %{socket: socket, host: host} do
+      ref =
+        push(socket, "metric:medium", %{
+          "collected_at" => "2026-04-21T12:05:00Z",
+          "data" => %{"vms_detail" => []}
+        })
+
+      assert_reply ref, :ok
+
+      sample = Server.Metrics.latest_sample(host.id, "medium")
+      assert sample != nil
+      assert sample.payload == %{"vms_detail" => []}
+    end
+
+    test "metric:slow is stored with interval=slow", %{socket: socket, host: host} do
+      ref =
+        push(socket, "metric:slow", %{
+          "collected_at" => "2026-04-21T12:30:00Z",
+          "data" => %{"system_info" => %{"pveversion" => "8.3.0"}}
+        })
+
+      assert_reply ref, :ok
+
+      sample = Server.Metrics.latest_sample(host.id, "slow")
+      assert sample != nil
+      assert sample.payload == %{"system_info" => %{"pveversion" => "8.3.0"}}
+    end
+
+    test "replies :error when collected_at is missing", %{socket: socket} do
+      ref = push(socket, "metric:fast", %{"data" => %{}})
+      assert_reply ref, :error, %{reason: "missing_collected_at"}
+    end
+
+    test "replies :error when data is missing", %{socket: socket} do
+      ref = push(socket, "metric:fast", %{"collected_at" => "2026-04-21T12:00:00Z"})
+      assert_reply ref, :error, %{reason: "missing_data"}
     end
   end