Carsten
a4f4d3ca51
Four tasks: collector enrichment (pool_type/scan/vdevs), classification coverage tests, CSS for capacity bar + pool block, LiveView rendering and test updates. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
532 lines
19 KiB
Markdown
532 lines
19 KiB
Markdown
# ZFS Pool Detail Implementation Plan
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> **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.
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**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.
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**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.
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**Tech Stack:** Elixir / Phoenix LiveView, ExUnit, existing `assets/css/app.css`. Design doc: `docs/superpowers/specs/2026-04-22-zfs-pool-detail-design.md`.
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---
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## File Structure
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**Modify**
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- `agent/lib/proxmox_agent/collectors/zfs.ex` — extend `merge_pools/2` to emit `pool_type`, `scan_function`, `scan_state`, and `vdevs` list.
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- `agent/test/proxmox_agent/collectors/zfs_test.exs` — extend existing assertions, add new test cases for stripe, mixed, and ignored special vdev types.
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- `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.
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- `server/assets/css/app.css` — add `.capbar` rules.
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- `server/test/server_web/live/host_detail_live_test.exs` — extend the fast-sample pool fixture with the new fields and add assertions.
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**No new files.** All changes are additive and land inside existing modules.
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---
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## Task 1: Agent collector — pool_type, scan state, vdev list
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**Files:**
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- Modify: `agent/lib/proxmox_agent/collectors/zfs.ex`
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- Modify: `agent/test/proxmox_agent/collectors/zfs_test.exs`
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- Modify: `agent/test/fixtures/zfs/zpool_status.json`
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### - [ ] Step 1: Add per-vdev error counters to the fixture so tests can assert on them
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Replace `agent/test/fixtures/zfs/zpool_status.json` with:
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```json
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{
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"output_version": { "command": "zpool status", "vers_major": 0, "vers_minor": 1 },
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"pools": {
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"rpool": {
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"name": "rpool",
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"state": "ONLINE",
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"scan": {
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"function": "scrub",
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"state": "FINISHED",
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"end_time": "Sat Apr 19 02:00:00 2026"
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},
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"error_count": "0",
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"vdevs": {
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"mirror-0": {
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"name": "mirror-0",
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"vdev_type": "mirror",
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"state": "ONLINE",
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"read_errors": "0",
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"write_errors": "0",
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"checksum_errors": "0"
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}
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}
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},
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"tank": {
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"name": "tank",
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"state": "DEGRADED",
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"scan": {
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"function": "scrub",
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"state": "SCANNING",
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"end_time": "Tue Mar 01 08:00:00 2026"
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},
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"error_count": "2",
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"vdevs": {
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"raidz2-0": {
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"name": "raidz2-0",
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"vdev_type": "raidz2",
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"state": "DEGRADED",
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"read_errors": "0",
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"write_errors": "0",
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"checksum_errors": "2"
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}
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}
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}
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}
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}
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```
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(The only change from the current fixture is `"tank"`'s `scan.state` → `"SCANNING"` so a scrub-in-progress case is covered.)
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### - [ ] Step 2: Extend the existing fixture-based test with new field assertions
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Edit `agent/test/proxmox_agent/collectors/zfs_test.exs`. Inside `describe "collect_pools/1"`, replace the `"returns a summary per pool"` test body with:
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```elixir
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test "returns a summary per pool" do
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sample = Zfs.collect_pools(runner: fake_runner())
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assert is_list(sample.pools)
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assert length(sample.pools) == 2
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rpool = Enum.find(sample.pools, &(&1.name == "rpool"))
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tank = Enum.find(sample.pools, &(&1.name == "tank"))
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assert rpool.health == "ONLINE"
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assert rpool.capacity_percent == 40
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assert rpool.fragmentation_percent == 17
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assert rpool.size_bytes == 500_000_000_000
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assert rpool.error_count == 0
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assert rpool.degraded_vdev_count == 0
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assert rpool.pool_type == "mirror"
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assert rpool.scan_function == "scrub"
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assert rpool.scan_state == "FINISHED"
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assert [%{name: "mirror-0", type: "mirror", state: "ONLINE",
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read_errors: 0, write_errors: 0, checksum_errors: 0}] = rpool.vdevs
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assert tank.health == "DEGRADED"
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assert tank.error_count == 2
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assert tank.degraded_vdev_count == 1
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assert tank.pool_type == "raidz2"
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assert tank.scan_state == "SCANNING"
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assert [%{name: "raidz2-0", type: "raidz2", state: "DEGRADED",
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checksum_errors: 2}] = tank.vdevs
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end
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```
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### - [ ] Step 3: Run tests — expect FAIL
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Run: `cd agent && mix test test/proxmox_agent/collectors/zfs_test.exs`
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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.
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### - [ ] Step 4: Implement the new fields in the collector
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Edit `agent/lib/proxmox_agent/collectors/zfs.ex`. Update the `@type pool_summary` and `merge_pools/2` function as follows:
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```elixir
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@type vdev_summary :: %{
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name: String.t(),
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type: String.t(),
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state: String.t(),
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read_errors: non_neg_integer(),
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write_errors: non_neg_integer(),
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checksum_errors: non_neg_integer()
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}
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@type pool_summary :: %{
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name: String.t(),
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health: String.t(),
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size_bytes: non_neg_integer(),
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allocated_bytes: non_neg_integer(),
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free_bytes: non_neg_integer(),
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fragmentation_percent: non_neg_integer(),
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capacity_percent: non_neg_integer(),
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error_count: non_neg_integer(),
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vdev_count: non_neg_integer(),
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degraded_vdev_count: non_neg_integer(),
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pool_type: String.t(),
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scan_function: String.t() | nil,
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scan_state: String.t() | nil,
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last_scrub_end: String.t() | nil,
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vdevs: [vdev_summary()]
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}
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```
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Replace the body of `merge_pools(%{"pools" => list_pools}, %{"pools" => status_pools})` with:
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```elixir
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defp merge_pools(%{"pools" => list_pools}, %{"pools" => status_pools}) do
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Enum.map(list_pools, fn {name, list_info} ->
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status_info = Map.get(status_pools, name, %{})
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raw_vdevs = Map.get(status_info, "vdevs", %{}) |> Map.values()
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vdevs = Enum.map(raw_vdevs, &vdev_summary/1)
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%{
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name: name,
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health: Map.get(list_info, "health"),
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size_bytes: Map.get(list_info, "size", 0),
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allocated_bytes: Map.get(list_info, "alloc", 0),
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free_bytes: Map.get(list_info, "free", 0),
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fragmentation_percent: Map.get(list_info, "frag", 0),
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capacity_percent: Map.get(list_info, "cap", 0),
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error_count: to_int(Map.get(status_info, "error_count", "0")),
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vdev_count: length(vdevs),
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degraded_vdev_count: Enum.count(vdevs, &(&1.state != "ONLINE")),
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pool_type: derive_pool_type(vdevs),
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scan_function: get_in(status_info, ["scan", "function"]),
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scan_state: get_in(status_info, ["scan", "state"]),
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last_scrub_end: get_in(status_info, ["scan", "end_time"]),
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vdevs: vdevs
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}
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end)
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end
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defp vdev_summary(v) do
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%{
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name: Map.get(v, "name"),
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type: Map.get(v, "vdev_type"),
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state: Map.get(v, "state"),
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read_errors: to_int(Map.get(v, "read_errors", "0")),
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write_errors: to_int(Map.get(v, "write_errors", "0")),
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checksum_errors: to_int(Map.get(v, "checksum_errors", "0"))
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}
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end
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@data_vdev_types ~w(mirror raidz1 raidz2 raidz3 disk)
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@special_vdev_types ~w(log cache spare dedup special)
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defp derive_pool_type(vdevs) do
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data_types =
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vdevs
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|> Enum.map(& &1.type)
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|> Enum.reject(&(&1 in @special_vdev_types))
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|> Enum.uniq()
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case data_types do
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[] -> "unknown"
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["disk"] -> "stripe"
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[t] when t in @data_vdev_types -> t
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_ -> "mixed"
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end
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end
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```
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### - [ ] Step 5: Run tests — expect PASS
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Run: `cd agent && mix test test/proxmox_agent/collectors/zfs_test.exs`
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Expected: all tests pass.
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### - [ ] Step 6: Commit
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```bash
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git add agent/lib/proxmox_agent/collectors/zfs.ex \
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agent/test/proxmox_agent/collectors/zfs_test.exs \
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agent/test/fixtures/zfs/zpool_status.json
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git commit -m "feat(agent): enrich zpool summary with type, scan state, vdev list"
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```
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---
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## Task 2: Agent collector — stripe, mixed, and special-vdev coverage
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**Files:**
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- Modify: `agent/test/proxmox_agent/collectors/zfs_test.exs`
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### - [ ] Step 1: Add test for plain stripe, mixed layout, and special-vdev filtering
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Append this block inside `describe "collect_pools/1"` in `agent/test/proxmox_agent/collectors/zfs_test.exs`:
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```elixir
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test "classifies pool_type for stripe, mixed, and special vdevs" do
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list_json =
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Jason.encode!(%{
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"pools" => %{
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"stripe" => %{"name" => "stripe", "size" => 1, "alloc" => 0, "free" => 1,
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"frag" => 0, "cap" => 0, "health" => "ONLINE"},
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"mixed" => %{"name" => "mixed", "size" => 1, "alloc" => 0, "free" => 1,
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"frag" => 0, "cap" => 0, "health" => "ONLINE"},
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"mirror_with_log" => %{"name" => "mirror_with_log", "size" => 1, "alloc" => 0, "free" => 1,
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"frag" => 0, "cap" => 0, "health" => "ONLINE"}
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}
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})
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vdev = fn name, type ->
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{name, %{"name" => name, "vdev_type" => type, "state" => "ONLINE",
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"read_errors" => "0", "write_errors" => "0", "checksum_errors" => "0"}}
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end
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status_json =
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Jason.encode!(%{
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"pools" => %{
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"stripe" => %{
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"name" => "stripe", "state" => "ONLINE", "error_count" => "0",
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"vdevs" => Map.new([vdev.("sda", "disk"), vdev.("sdb", "disk")])
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},
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"mixed" => %{
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"name" => "mixed", "state" => "ONLINE", "error_count" => "0",
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"vdevs" => Map.new([vdev.("mirror-0", "mirror"), vdev.("raidz1-1", "raidz1")])
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},
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"mirror_with_log" => %{
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"name" => "mirror_with_log", "state" => "ONLINE", "error_count" => "0",
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"vdevs" => Map.new([vdev.("mirror-0", "mirror"), vdev.("log-0", "log")])
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}
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}
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})
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runner = fn
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"zpool", ["list" | _] -> {:ok, list_json}
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"zpool", ["status" | _] -> {:ok, status_json}
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end
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sample = Zfs.collect_pools(runner: runner)
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by_name = Map.new(sample.pools, &{&1.name, &1})
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assert by_name["stripe"].pool_type == "stripe"
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assert by_name["mixed"].pool_type == "mixed"
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assert by_name["mirror_with_log"].pool_type == "mirror"
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# log vdev is retained in the per-pool vdevs list even though it's ignored for layout classification
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assert Enum.any?(by_name["mirror_with_log"].vdevs, &(&1.type == "log"))
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end
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```
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### - [ ] Step 2: Run the new test — expect PASS (collector already implements the logic)
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Run: `cd agent && mix test test/proxmox_agent/collectors/zfs_test.exs`
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Expected: all tests pass, including the new case.
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### - [ ] Step 3: Commit
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```bash
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git add agent/test/proxmox_agent/collectors/zfs_test.exs
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git commit -m "test(agent): cover stripe, mixed, and special-vdev pool_type classification"
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```
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---
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## Task 3: UI — capacity bar CSS
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**Files:**
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- Modify: `server/assets/css/app.css`
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### - [ ] Step 1: Add `.capbar` rules after the existing `.pool-row` block
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In `server/assets/css/app.css`, locate the `.pool-row` rules (around lines 249–258) and insert the following immediately after them:
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```css
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.capbar {
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height: 4px;
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background: var(--panel-2);
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border-radius: 2px;
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overflow: hidden;
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margin: 0.25rem 0 0.4rem;
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}
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.capbar > span {
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display: block;
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height: 100%;
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background: var(--ok);
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transition: width 0.3s ease;
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}
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.capbar[data-level="warn"] > span { background: var(--warn); }
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.capbar[data-level="crit"] > span { background: var(--crit); }
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.pool-block {
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padding: 0.6rem 0.9rem;
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border-bottom: 1px solid var(--border);
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}
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.pool-block:last-child { border-bottom: none; }
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.pool-block .head {
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display: flex;
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justify-content: space-between;
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align-items: baseline;
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gap: 0.6rem;
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}
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.pool-block .head .layout { color: var(--muted); font-size: 0.8rem; margin-left: 0.5rem; }
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.pool-block .sizes { font-family: var(--mono); font-size: 0.78rem; color: var(--fg); }
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.pool-block .details { color: var(--muted); font-family: var(--mono); font-size: 0.78rem; }
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```
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### - [ ] Step 2: Commit
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```bash
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git add server/assets/css/app.css
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git commit -m "style(ui): capacity bar and per-pool block styles"
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```
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---
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## Task 4: UI — render per-pool block with type, capacity bar, sizes, scrub state
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**Files:**
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- Modify: `server/lib/server_web/live/host_detail_live.ex`
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- Modify: `server/test/server_web/live/host_detail_live_test.exs`
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### - [ ] Step 1: Extend the LiveView test fixture with the new fields and add assertions
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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:
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```elixir
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"zfs_pools" => %{
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"pools" => [
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%{
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"name" => "rpool",
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"health" => "ONLINE",
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"pool_type" => "mirror",
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"size_bytes" => 500_000_000_000,
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"allocated_bytes" => 200_000_000_000,
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"free_bytes" => 300_000_000_000,
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"capacity_percent" => 40,
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"fragmentation_percent" => 17,
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"error_count" => 0,
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"vdev_count" => 1,
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"degraded_vdev_count" => 0,
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"scan_function" => "scrub",
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"scan_state" => "FINISHED",
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"last_scrub_end" => "Sat Apr 19 02:00:00 2026",
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"vdevs" => [
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%{"name" => "mirror-0", "type" => "mirror", "state" => "ONLINE",
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"read_errors" => 0, "write_errors" => 0, "checksum_errors" => 0}
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]
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}
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]
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},
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```
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Then in the `"renders sections..."` test, after the existing assertions, add:
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```elixir
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assert html =~ "mirror"
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assert html =~ "465.7 GB" # size_bytes formatted
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assert html =~ "186.3 GB" # allocated_bytes formatted
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assert html =~ "279.4 GB" # free_bytes formatted
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assert html =~ "capbar"
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assert html =~ "scrub"
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```
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(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.)
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### - [ ] Step 2: Run LiveView test — expect FAIL
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Run: `cd server && mix test test/server_web/live/host_detail_live_test.exs`
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Expected: `"renders sections..."` fails on the new assertions (`"mirror"`, sizes, `"capbar"`).
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### - [ ] Step 3: Replace the pool-rendering block in the LiveView
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In `server/lib/server_web/live/host_detail_live.ex`, replace the panel that renders ZFS pools (current lines 65–87, the `<div class="panel">` containing `<header><span>ZFS pools</span>` down through its closing `</div>`) with:
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```heex
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<div class="panel">
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<header><span>ZFS pools</span><span class="mono">{length(pools(@fast))}</span></header>
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<div class="body tight">
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<div :if={pools(@fast) == []} class="empty">No data.</div>
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<div :for={pool <- pools(@fast)} class="pool-block">
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<div class="head">
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<div>
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<span class="mono" style="color: var(--fg-bright); font-weight: 600;">{pool["name"]}</span>
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<span class="layout">{pool_layout(pool)}</span>
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</div>
|
||
<span class="badge" style={pool_badge_style(pool["health"])}>{pool["health"]}</span>
|
||
</div>
|
||
|
||
<div class="capbar" data-level={capbar_level(pool["capacity_percent"])}>
|
||
<span style={"width: #{pool["capacity_percent"] || 0}%"}></span>
|
||
</div>
|
||
|
||
<div class="sizes">
|
||
used {format_bytes(pool["allocated_bytes"] || 0)} ·
|
||
free {format_bytes(pool["free_bytes"] || 0)} ·
|
||
total {format_bytes(pool["size_bytes"] || 0)}
|
||
<span class="muted">({pool["capacity_percent"] || 0}%)</span>
|
||
</div>
|
||
|
||
<div class="details">
|
||
frag {pool["fragmentation_percent"] || 0}% ·
|
||
err {pool["error_count"] || 0} ·
|
||
vdevs {pool["vdev_count"] || 0} (deg {pool["degraded_vdev_count"] || 0}) ·
|
||
{pool_scrub_line(pool)}
|
||
</div>
|
||
|
||
<div :for={v <- degraded_vdevs(pool)} class="callout err" style="margin-top: 0.4rem;">
|
||
{v["name"]} {v["state"]} · r={v["read_errors"]} w={v["write_errors"]} cksum={v["checksum_errors"]}
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
```
|
||
|
||
Then add these helper functions near the other private helpers (after `pool_badge_style/1`):
|
||
|
||
```elixir
|
||
defp pool_layout(pool) do
|
||
case pool["pool_type"] do
|
||
nil -> "—"
|
||
"" -> "—"
|
||
t -> t
|
||
end
|
||
end
|
||
|
||
defp capbar_level(cap) when is_number(cap) and cap >= 90, do: "crit"
|
||
defp capbar_level(cap) when is_number(cap) and cap >= 80, do: "warn"
|
||
defp capbar_level(_), do: "ok"
|
||
|
||
defp pool_scrub_line(%{"scan_state" => "SCANNING"}), do: "scrub scanning"
|
||
|
||
defp pool_scrub_line(%{"scan_state" => "FINISHED", "last_scrub_end" => end_time})
|
||
when is_binary(end_time) and end_time != "",
|
||
do: "scrub #{end_time}"
|
||
|
||
defp pool_scrub_line(%{"last_scrub_end" => end_time}) when is_binary(end_time) and end_time != "",
|
||
do: "scrub #{end_time}"
|
||
|
||
defp pool_scrub_line(_), do: "scrub never"
|
||
|
||
defp degraded_vdevs(pool) do
|
||
(pool["vdevs"] || [])
|
||
|> Enum.filter(fn v -> Map.get(v, "state") not in [nil, "ONLINE"] end)
|
||
end
|
||
```
|
||
|
||
### - [ ] Step 4: Run LiveView test — expect PASS
|
||
|
||
Run: `cd server && mix test test/server_web/live/host_detail_live_test.exs`
|
||
|
||
Expected: all tests pass.
|
||
|
||
### - [ ] Step 5: Run the full server suite to catch regressions
|
||
|
||
Run: `cd server && mix test`
|
||
|
||
Expected: all tests pass.
|
||
|
||
### - [ ] Step 6: Run the full agent suite to catch regressions
|
||
|
||
Run: `cd agent && mix test`
|
||
|
||
Expected: all tests pass.
|
||
|
||
### - [ ] Step 7: Manual visual check (dev server)
|
||
|
||
Start the server locally (`cd server && mix phx.server`), log in, open a host detail page with live agent data, and confirm:
|
||
|
||
- Each pool shows `name pool_type` on line 1 with the health badge on the right.
|
||
- The capacity bar renders at the correct width and turns yellow/red at 80% / 90%.
|
||
- `used / free / total` line shows bytes formatted like `200.0 GB`.
|
||
- The `details` line shows frag/err/vdevs and a scrub label (`scrub finished …`, `scrub scanning`, or `scrub never`).
|
||
- Degraded pools list each non-ONLINE vdev in a red `.callout.err` line; ONLINE pools don't.
|
||
|
||
If the manual check reveals a rendering issue, fix it in `host_detail_live.ex` and re-run `cd server && mix test`.
|
||
|
||
### - [ ] Step 8: Commit
|
||
|
||
```bash
|
||
git add server/lib/server_web/live/host_detail_live.ex \
|
||
server/test/server_web/live/host_detail_live_test.exs
|
||
git commit -m "feat(ui): detailed per-pool block with type, capacity bar, scrub state"
|
||
```
|