diff --git a/agent/lib/proxmox_agent/collectors/zfs.ex b/agent/lib/proxmox_agent/collectors/zfs.ex index 89dfdd2..933ba70 100644 --- a/agent/lib/proxmox_agent/collectors/zfs.ex +++ b/agent/lib/proxmox_agent/collectors/zfs.ex @@ -4,15 +4,6 @@ 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(), @@ -24,11 +15,7 @@ defmodule ProxmoxAgent.Collectors.Zfs do error_count: non_neg_integer(), vdev_count: non_neg_integer(), degraded_vdev_count: non_neg_integer(), - pool_type: String.t(), - scan_function: String.t() | nil, - scan_state: String.t() | nil, - last_scrub_end: String.t() | nil, - vdevs: [vdev_summary()] + last_scrub_end: String.t() | nil } @spec collect_pools(keyword()) :: %{pools: [pool_summary()], errors: [map()]} @@ -84,8 +71,7 @@ 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, %{}) - raw_vdevs = Map.get(status_info, "vdevs", %{}) |> Map.values() - vdevs = Enum.map(raw_vdevs, &vdev_summary/1) + vdevs = Map.get(status_info, "vdevs", %{}) |> Map.values() %{ name: name, @@ -97,45 +83,12 @@ 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")), - 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 + degraded_vdev_count: Enum.count(vdevs, &(&1["state"] != "ONLINE")), + last_scrub_end: get_in(status_info, ["scan", "end_time"]) } 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 @@ -176,15 +129,7 @@ defmodule ProxmoxAgent.Collectors.Zfs do end defp to_int(v) when is_integer(v), do: v - - defp to_int(v) when is_binary(v) do - case Integer.parse(v) do - {n, _} -> n - :error -> 0 - end - end - - defp to_int(_), do: 0 + defp to_int(v) when is_binary(v), do: String.to_integer(v) defp max_or_nil([]), do: nil defp max_or_nil(list), do: Enum.max(list) diff --git a/agent/test/fixtures/zfs/zpool_status.json b/agent/test/fixtures/zfs/zpool_status.json index 693a779..b066e78 100644 --- a/agent/test/fixtures/zfs/zpool_status.json +++ b/agent/test/fixtures/zfs/zpool_status.json @@ -26,7 +26,7 @@ "state": "DEGRADED", "scan": { "function": "scrub", - "state": "SCANNING", + "state": "FINISHED", "end_time": "Tue Mar 01 08:00:00 2026" }, "error_count": "2", diff --git a/agent/test/proxmox_agent/collectors/zfs_test.exs b/agent/test/proxmox_agent/collectors/zfs_test.exs index cceda66..e3220d1 100644 --- a/agent/test/proxmox_agent/collectors/zfs_test.exs +++ b/agent/test/proxmox_agent/collectors/zfs_test.exs @@ -32,19 +32,10 @@ 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 @@ -53,94 +44,6 @@ defmodule ProxmoxAgent.Collectors.ZfsTest do assert sample.pools == [] assert length(sample.errors) >= 1 end - - test "classifies pool_type for stripe, mixed, and special vdevs" do - list_json = - Jason.encode!(%{ - "pools" => %{ - "stripe" => %{"name" => "stripe", "size" => 1, "alloc" => 0, "free" => 1, - "frag" => 0, "cap" => 0, "health" => "ONLINE"}, - "mixed" => %{"name" => "mixed", "size" => 1, "alloc" => 0, "free" => 1, - "frag" => 0, "cap" => 0, "health" => "ONLINE"}, - "mirror_with_log" => %{"name" => "mirror_with_log", "size" => 1, "alloc" => 0, "free" => 1, - "frag" => 0, "cap" => 0, "health" => "ONLINE"} - } - }) - - vdev = fn name, type -> - {name, %{"name" => name, "vdev_type" => type, "state" => "ONLINE", - "read_errors" => "0", "write_errors" => "0", "checksum_errors" => "0"}} - end - - status_json = - Jason.encode!(%{ - "pools" => %{ - "stripe" => %{ - "name" => "stripe", "state" => "ONLINE", "error_count" => "0", - "vdevs" => Map.new([vdev.("sda", "disk"), vdev.("sdb", "disk")]) - }, - "mixed" => %{ - "name" => "mixed", "state" => "ONLINE", "error_count" => "0", - "vdevs" => Map.new([vdev.("mirror-0", "mirror"), vdev.("raidz1-1", "raidz1")]) - }, - "mirror_with_log" => %{ - "name" => "mirror_with_log", "state" => "ONLINE", "error_count" => "0", - "vdevs" => Map.new([vdev.("mirror-0", "mirror"), vdev.("log-0", "log")]) - } - } - }) - - runner = fn - "zpool", ["list" | _] -> {:ok, list_json} - "zpool", ["status" | _] -> {:ok, status_json} - end - - sample = Zfs.collect_pools(runner: runner) - by_name = Map.new(sample.pools, &{&1.name, &1}) - - assert by_name["stripe"].pool_type == "stripe" - assert by_name["mixed"].pool_type == "mixed" - assert by_name["mirror_with_log"].pool_type == "mirror" - # log vdev is retained in the per-pool vdevs list even though it's ignored for layout classification - assert Enum.any?(by_name["mirror_with_log"].vdevs, &(&1.type == "log")) - end - - test "tolerates nil and non-integer error counters" do - list_json = - Jason.encode!(%{ - "pools" => %{ - "weird" => %{"name" => "weird", "size" => 1, "alloc" => 0, "free" => 1, - "frag" => 0, "cap" => 0, "health" => "ONLINE"} - } - }) - - status_json = - Jason.encode!(%{ - "pools" => %{ - "weird" => %{ - "name" => "weird", "state" => "ONLINE", "error_count" => nil, - "vdevs" => %{ - "disk-0" => %{"name" => "disk-0", "vdev_type" => "disk", "state" => "ONLINE", - "read_errors" => nil, "write_errors" => "abc", - "checksum_errors" => "0"} - } - } - } - }) - - runner = fn - "zpool", ["list" | _] -> {:ok, list_json} - "zpool", ["status" | _] -> {:ok, status_json} - end - - sample = Zfs.collect_pools(runner: runner) - [pool] = sample.pools - assert pool.error_count == 0 - [vdev] = pool.vdevs - assert vdev.read_errors == 0 - assert vdev.write_errors == 0 - assert vdev.checksum_errors == 0 - end end describe "collect_datasets/1" do diff --git a/docs/superpowers/plans/2026-04-22-zfs-pool-detail.md b/docs/superpowers/plans/2026-04-22-zfs-pool-detail.md deleted file mode 100644 index df86ec2..0000000 --- a/docs/superpowers/plans/2026-04-22-zfs-pool-detail.md +++ /dev/null @@ -1,532 +0,0 @@ -# ZFS Pool Detail Implementation Plan - -> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking. - -**Goal:** Show type, total/used/free size, capacity bar, and scan state per ZFS pool on the host detail page — a simple at-a-glance view with no drill-down yet. - -**Architecture:** Extend the existing agent collector (`ProxmoxAgent.Collectors.Zfs.collect_pools/1`) to derive `pool_type`, `scan_function`, `scan_state`, and a compact `vdevs` list from the already-fetched `zpool status -j --json-flat-vdevs` JSON. No new shell-outs. The Phoenix channel stores pool payloads as opaque JSON, so server/DB layers need no change. The host detail LiveView renders a new compact per-pool block using the enriched fields plus a thin capacity bar driven by existing `capacity_percent` thresholds. - -**Tech Stack:** Elixir / Phoenix LiveView, ExUnit, existing `assets/css/app.css`. Design doc: `docs/superpowers/specs/2026-04-22-zfs-pool-detail-design.md`. - ---- - -## File Structure - -**Modify** -- `agent/lib/proxmox_agent/collectors/zfs.ex` — extend `merge_pools/2` to emit `pool_type`, `scan_function`, `scan_state`, and `vdevs` list. -- `agent/test/proxmox_agent/collectors/zfs_test.exs` — extend existing assertions, add new test cases for stripe, mixed, and ignored special vdev types. -- `server/lib/server_web/live/host_detail_live.ex` — replace the pool row markup (current lines 69–86), add `capbar_level/1`, `pool_scrub_line/1`, and `pool_layout/1` helpers. -- `server/assets/css/app.css` — add `.capbar` rules. -- `server/test/server_web/live/host_detail_live_test.exs` — extend the fast-sample pool fixture with the new fields and add assertions. - -**No new files.** All changes are additive and land inside existing modules. - ---- - -## Task 1: Agent collector — pool_type, scan state, vdev list - -**Files:** -- Modify: `agent/lib/proxmox_agent/collectors/zfs.ex` -- Modify: `agent/test/proxmox_agent/collectors/zfs_test.exs` -- Modify: `agent/test/fixtures/zfs/zpool_status.json` - -### - [ ] Step 1: Add per-vdev error counters to the fixture so tests can assert on them - -Replace `agent/test/fixtures/zfs/zpool_status.json` with: - -```json -{ - "output_version": { "command": "zpool status", "vers_major": 0, "vers_minor": 1 }, - "pools": { - "rpool": { - "name": "rpool", - "state": "ONLINE", - "scan": { - "function": "scrub", - "state": "FINISHED", - "end_time": "Sat Apr 19 02:00:00 2026" - }, - "error_count": "0", - "vdevs": { - "mirror-0": { - "name": "mirror-0", - "vdev_type": "mirror", - "state": "ONLINE", - "read_errors": "0", - "write_errors": "0", - "checksum_errors": "0" - } - } - }, - "tank": { - "name": "tank", - "state": "DEGRADED", - "scan": { - "function": "scrub", - "state": "SCANNING", - "end_time": "Tue Mar 01 08:00:00 2026" - }, - "error_count": "2", - "vdevs": { - "raidz2-0": { - "name": "raidz2-0", - "vdev_type": "raidz2", - "state": "DEGRADED", - "read_errors": "0", - "write_errors": "0", - "checksum_errors": "2" - } - } - } - } -} -``` - -(The only change from the current fixture is `"tank"`'s `scan.state` → `"SCANNING"` so a scrub-in-progress case is covered.) - -### - [ ] Step 2: Extend the existing fixture-based test with new field assertions - -Edit `agent/test/proxmox_agent/collectors/zfs_test.exs`. Inside `describe "collect_pools/1"`, replace the `"returns a summary per pool"` test body with: - -```elixir -test "returns a summary per pool" do - sample = Zfs.collect_pools(runner: fake_runner()) - assert is_list(sample.pools) - assert length(sample.pools) == 2 - rpool = Enum.find(sample.pools, &(&1.name == "rpool")) - tank = Enum.find(sample.pools, &(&1.name == "tank")) - - assert rpool.health == "ONLINE" - assert rpool.capacity_percent == 40 - assert rpool.fragmentation_percent == 17 - 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 -``` - -### - [ ] Step 3: Run tests — expect FAIL - -Run: `cd agent && mix test test/proxmox_agent/collectors/zfs_test.exs` - -Expected: the `"returns a summary per pool"` test fails because `:pool_type`, `:scan_function`, `:scan_state`, and `:vdevs` are not yet on the pool map. - -### - [ ] Step 4: Implement the new fields in the collector - -Edit `agent/lib/proxmox_agent/collectors/zfs.ex`. Update the `@type pool_summary` and `merge_pools/2` function as follows: - -```elixir - @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(), - size_bytes: non_neg_integer(), - allocated_bytes: non_neg_integer(), - free_bytes: non_neg_integer(), - fragmentation_percent: non_neg_integer(), - capacity_percent: non_neg_integer(), - error_count: non_neg_integer(), - vdev_count: non_neg_integer(), - degraded_vdev_count: non_neg_integer(), - pool_type: String.t(), - scan_function: String.t() | nil, - scan_state: String.t() | nil, - last_scrub_end: String.t() | nil, - vdevs: [vdev_summary()] - } -``` - -Replace the body of `merge_pools(%{"pools" => list_pools}, %{"pools" => status_pools})` with: - -```elixir - 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, %{}) - raw_vdevs = Map.get(status_info, "vdevs", %{}) |> Map.values() - vdevs = Enum.map(raw_vdevs, &vdev_summary/1) - - %{ - name: name, - health: Map.get(list_info, "health"), - size_bytes: Map.get(list_info, "size", 0), - allocated_bytes: Map.get(list_info, "alloc", 0), - free_bytes: Map.get(list_info, "free", 0), - fragmentation_percent: Map.get(list_info, "frag", 0), - 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")), - 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 -``` - -### - [ ] Step 5: Run tests — expect PASS - -Run: `cd agent && mix test test/proxmox_agent/collectors/zfs_test.exs` - -Expected: all tests pass. - -### - [ ] Step 6: Commit - -```bash -git add agent/lib/proxmox_agent/collectors/zfs.ex \ - agent/test/proxmox_agent/collectors/zfs_test.exs \ - agent/test/fixtures/zfs/zpool_status.json -git commit -m "feat(agent): enrich zpool summary with type, scan state, vdev list" -``` - ---- - -## Task 2: Agent collector — stripe, mixed, and special-vdev coverage - -**Files:** -- Modify: `agent/test/proxmox_agent/collectors/zfs_test.exs` - -### - [ ] Step 1: Add test for plain stripe, mixed layout, and special-vdev filtering - -Append this block inside `describe "collect_pools/1"` in `agent/test/proxmox_agent/collectors/zfs_test.exs`: - -```elixir - test "classifies pool_type for stripe, mixed, and special vdevs" do - list_json = - Jason.encode!(%{ - "pools" => %{ - "stripe" => %{"name" => "stripe", "size" => 1, "alloc" => 0, "free" => 1, - "frag" => 0, "cap" => 0, "health" => "ONLINE"}, - "mixed" => %{"name" => "mixed", "size" => 1, "alloc" => 0, "free" => 1, - "frag" => 0, "cap" => 0, "health" => "ONLINE"}, - "mirror_with_log" => %{"name" => "mirror_with_log", "size" => 1, "alloc" => 0, "free" => 1, - "frag" => 0, "cap" => 0, "health" => "ONLINE"} - } - }) - - vdev = fn name, type -> - {name, %{"name" => name, "vdev_type" => type, "state" => "ONLINE", - "read_errors" => "0", "write_errors" => "0", "checksum_errors" => "0"}} - end - - status_json = - Jason.encode!(%{ - "pools" => %{ - "stripe" => %{ - "name" => "stripe", "state" => "ONLINE", "error_count" => "0", - "vdevs" => Map.new([vdev.("sda", "disk"), vdev.("sdb", "disk")]) - }, - "mixed" => %{ - "name" => "mixed", "state" => "ONLINE", "error_count" => "0", - "vdevs" => Map.new([vdev.("mirror-0", "mirror"), vdev.("raidz1-1", "raidz1")]) - }, - "mirror_with_log" => %{ - "name" => "mirror_with_log", "state" => "ONLINE", "error_count" => "0", - "vdevs" => Map.new([vdev.("mirror-0", "mirror"), vdev.("log-0", "log")]) - } - } - }) - - runner = fn - "zpool", ["list" | _] -> {:ok, list_json} - "zpool", ["status" | _] -> {:ok, status_json} - end - - sample = Zfs.collect_pools(runner: runner) - by_name = Map.new(sample.pools, &{&1.name, &1}) - - assert by_name["stripe"].pool_type == "stripe" - assert by_name["mixed"].pool_type == "mixed" - assert by_name["mirror_with_log"].pool_type == "mirror" - # log vdev is retained in the per-pool vdevs list even though it's ignored for layout classification - assert Enum.any?(by_name["mirror_with_log"].vdevs, &(&1.type == "log")) - end -``` - -### - [ ] Step 2: Run the new test — expect PASS (collector already implements the logic) - -Run: `cd agent && mix test test/proxmox_agent/collectors/zfs_test.exs` - -Expected: all tests pass, including the new case. - -### - [ ] Step 3: Commit - -```bash -git add agent/test/proxmox_agent/collectors/zfs_test.exs -git commit -m "test(agent): cover stripe, mixed, and special-vdev pool_type classification" -``` - ---- - -## Task 3: UI — capacity bar CSS - -**Files:** -- Modify: `server/assets/css/app.css` - -### - [ ] Step 1: Add `.capbar` rules after the existing `.pool-row` block - -In `server/assets/css/app.css`, locate the `.pool-row` rules (around lines 249–258) and insert the following immediately after them: - -```css -.capbar { - height: 4px; - background: var(--panel-2); - border-radius: 2px; - overflow: hidden; - margin: 0.25rem 0 0.4rem; -} -.capbar > span { - display: block; - height: 100%; - background: var(--ok); - transition: width 0.3s ease; -} -.capbar[data-level="warn"] > span { background: var(--warn); } -.capbar[data-level="crit"] > span { background: var(--crit); } - -.pool-block { - padding: 0.6rem 0.9rem; - border-bottom: 1px solid var(--border); -} -.pool-block:last-child { border-bottom: none; } -.pool-block .head { - display: flex; - justify-content: space-between; - align-items: baseline; - gap: 0.6rem; -} -.pool-block .head .layout { color: var(--muted); font-size: 0.8rem; margin-left: 0.5rem; } -.pool-block .sizes { font-family: var(--mono); font-size: 0.78rem; color: var(--fg); } -.pool-block .details { color: var(--muted); font-family: var(--mono); font-size: 0.78rem; } -``` - -### - [ ] Step 2: Commit - -```bash -git add server/assets/css/app.css -git commit -m "style(ui): capacity bar and per-pool block styles" -``` - ---- - -## Task 4: UI — render per-pool block with type, capacity bar, sizes, scrub state - -**Files:** -- Modify: `server/lib/server_web/live/host_detail_live.ex` -- Modify: `server/test/server_web/live/host_detail_live_test.exs` - -### - [ ] Step 1: Extend the LiveView test fixture with the new fields and add assertions - -In `server/test/server_web/live/host_detail_live_test.exs`, replace the `"zfs_pools"` block inside the `fast` fixture (currently ~lines 15–25) with: - -```elixir - "zfs_pools" => %{ - "pools" => [ - %{ - "name" => "rpool", - "health" => "ONLINE", - "pool_type" => "mirror", - "size_bytes" => 500_000_000_000, - "allocated_bytes" => 200_000_000_000, - "free_bytes" => 300_000_000_000, - "capacity_percent" => 40, - "fragmentation_percent" => 17, - "error_count" => 0, - "vdev_count" => 1, - "degraded_vdev_count" => 0, - "scan_function" => "scrub", - "scan_state" => "FINISHED", - "last_scrub_end" => "Sat Apr 19 02:00:00 2026", - "vdevs" => [ - %{"name" => "mirror-0", "type" => "mirror", "state" => "ONLINE", - "read_errors" => 0, "write_errors" => 0, "checksum_errors" => 0} - ] - } - ] - }, -``` - -Then in the `"renders sections..."` test, after the existing assertions, add: - -```elixir - assert html =~ "mirror" - assert html =~ "465.7 GB" # size_bytes formatted - assert html =~ "186.3 GB" # allocated_bytes formatted - assert html =~ "279.4 GB" # free_bytes formatted - assert html =~ "capbar" - assert html =~ "scrub" -``` - -(Byte-to-`format_bytes/1` values: 500 GB decimal → 465.7 GiB; 200 GB → 186.3 GiB; 300 GB → 279.4 GiB. The helper divides by 1024 per step.) - -### - [ ] Step 2: Run LiveView test — expect FAIL - -Run: `cd server && mix test test/server_web/live/host_detail_live_test.exs` - -Expected: `"renders sections..."` fails on the new assertions (`"mirror"`, sizes, `"capbar"`). - -### - [ ] Step 3: Replace the pool-rendering block in the LiveView - -In `server/lib/server_web/live/host_detail_live.ex`, replace the panel that renders ZFS pools (current lines 65–87, the `