feat(agent): enrich zpool summary with type, scan state, vdev list

agent/lib/proxmox_agent/collectors/zfs.ex

@@ -4,6 +4,15 @@ defmodule ProxmoxAgent.Collectors.Zfs do
   Delegates shelling out to an injectable runner so tests can supply fixtures.
   """
 
+  @type vdev_summary :: %{
+          name: String.t(),
+          type: String.t(),
+          state: String.t(),
+          read_errors: non_neg_integer(),
+          write_errors: non_neg_integer(),
+          checksum_errors: non_neg_integer()
+        }
+
   @type pool_summary :: %{
           name: String.t(),
           health: String.t(),
@@ -15,7 +24,11 @@ defmodule ProxmoxAgent.Collectors.Zfs do
           error_count: non_neg_integer(),
           vdev_count: non_neg_integer(),
           degraded_vdev_count: non_neg_integer(),
-          last_scrub_end: String.t() | nil
+          pool_type: String.t(),
+          scan_function: String.t() | nil,
+          scan_state: String.t() | nil,
+          last_scrub_end: String.t() | nil,
+          vdevs: [vdev_summary()]
         }
 
   @spec collect_pools(keyword()) :: %{pools: [pool_summary()], errors: [map()]}
@@ -71,7 +84,8 @@ defmodule ProxmoxAgent.Collectors.Zfs do
   defp merge_pools(%{"pools" => list_pools}, %{"pools" => status_pools}) do
     Enum.map(list_pools, fn {name, list_info} ->
       status_info = Map.get(status_pools, name, %{})
-      vdevs = Map.get(status_info, "vdevs", %{}) |> Map.values()
+      raw_vdevs = Map.get(status_info, "vdevs", %{}) |> Map.values()
+      vdevs = Enum.map(raw_vdevs, &vdev_summary/1)
 
       %{
         name: name,
@@ -83,12 +97,45 @@ defmodule ProxmoxAgent.Collectors.Zfs do
         capacity_percent: Map.get(list_info, "cap", 0),
         error_count: to_int(Map.get(status_info, "error_count", "0")),
         vdev_count: length(vdevs),
-        degraded_vdev_count: Enum.count(vdevs, &(&1["state"] != "ONLINE")),
-        last_scrub_end: get_in(status_info, ["scan", "end_time"])
+        degraded_vdev_count: Enum.count(vdevs, &(&1.state != "ONLINE")),
+        pool_type: derive_pool_type(vdevs),
+        scan_function: get_in(status_info, ["scan", "function"]),
+        scan_state: get_in(status_info, ["scan", "state"]),
+        last_scrub_end: get_in(status_info, ["scan", "end_time"]),
+        vdevs: vdevs
       }
     end)
   end
 
+  defp vdev_summary(v) do
+    %{
+      name: Map.get(v, "name"),
+      type: Map.get(v, "vdev_type"),
+      state: Map.get(v, "state"),
+      read_errors: to_int(Map.get(v, "read_errors", "0")),
+      write_errors: to_int(Map.get(v, "write_errors", "0")),
+      checksum_errors: to_int(Map.get(v, "checksum_errors", "0"))
+    }
+  end
+
+  @data_vdev_types ~w(mirror raidz1 raidz2 raidz3 disk)
+  @special_vdev_types ~w(log cache spare dedup special)
+
+  defp derive_pool_type(vdevs) do
+    data_types =
+      vdevs
+      |> Enum.map(& &1.type)
+      |> Enum.reject(&(&1 in @special_vdev_types))
+      |> Enum.uniq()
+
+    case data_types do
+      [] -> "unknown"
+      ["disk"] -> "stripe"
+      [t] when t in @data_vdev_types -> t
+      _ -> "mixed"
+    end
+  end
+
   defp summarize_datasets(nil), do: []
 
   defp summarize_datasets(%{"datasets" => datasets}) do

agent/test/fixtures/zfs/zpool_status.json

@@ -26,7 +26,7 @@
       "state": "DEGRADED",
       "scan": {
         "function": "scrub",
-        "state": "FINISHED",
+        "state": "SCANNING",
         "end_time": "Tue Mar 01 08:00:00 2026"
       },
       "error_count": "2",

agent/test/proxmox_agent/collectors/zfs_test.exs

@@ -32,10 +32,19 @@ defmodule ProxmoxAgent.Collectors.ZfsTest do
       assert rpool.size_bytes == 500_000_000_000
       assert rpool.error_count == 0
       assert rpool.degraded_vdev_count == 0
+      assert rpool.pool_type == "mirror"
+      assert rpool.scan_function == "scrub"
+      assert rpool.scan_state == "FINISHED"
+      assert [%{name: "mirror-0", type: "mirror", state: "ONLINE",
+                read_errors: 0, write_errors: 0, checksum_errors: 0}] = rpool.vdevs
 
       assert tank.health == "DEGRADED"
       assert tank.error_count == 2
       assert tank.degraded_vdev_count == 1
+      assert tank.pool_type == "raidz2"
+      assert tank.scan_state == "SCANNING"
+      assert [%{name: "raidz2-0", type: "raidz2", state: "DEGRADED",
+                checksum_errors: 2}] = tank.vdevs
     end
 
     test "populates errors list when zpool fails" do