From e7b96fbfa76a6f5d0d6f4a35450c121762216168 Mon Sep 17 00:00:00 2001
From: Bryan Van Deusen <bryan.vandeusen@fabledsword.com>
Date: Wed, 17 Jun 2026 20:43:33 -0400
Subject: [PATCH] feat(host_agent): surface network, disk I/O, and temperature
 in fleet widget

The agent already collects + ingests net throughput, disk I/O, and temps;
add them to the fleet-glance rows (fmt_bps + two-line io cells + temp with
70/85C threshold color), each shown only when the host reports it so VMs/
containers without sensors don't show blank cells.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 plugins/host_agent/routes.py                  |  2 ++
 .../host_agent/templates/widget_table.html    | 29 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/plugins/host_agent/routes.py b/plugins/host_agent/routes.py
index 644dbee..d8c66b1 100644
--- a/plugins/host_agent/routes.py
+++ b/plugins/host_agent/routes.py
@@ -409,6 +409,8 @@ async def _fleet_rows(session) -> list[dict]:
             "temp_max": m.get("temp_c_max"),
             "net_rx_bps": m.get("net_rx_bps"),
             "net_tx_bps": m.get("net_tx_bps"),
+            "disk_read_bps": m.get("disk_read_bps"),
+            "disk_write_bps": m.get("disk_write_bps"),
             "sparks": sparks,
         })
     rows.sort(key=lambda r: r["host"].name.lower())
diff --git a/plugins/host_agent/templates/widget_table.html b/plugins/host_agent/templates/widget_table.html
index 30fac53..d543b8d 100644
--- a/plugins/host_agent/templates/widget_table.html
+++ b/plugins/host_agent/templates/widget_table.html
@@ -14,6 +14,24 @@
   <div style="line-height:0;height:16px;">{{ svg | safe }}</div>
 </div>
 {% endmacro %}
+{# Human-readable throughput, matching the host-detail page. #}
+{% macro fmt_bps(v) %}
+{%- if v is none -%}—
+{%- elif v >= 1048576 -%}{{ "%.1f"|format(v / 1048576) }} MB/s
+{%- elif v >= 1024 -%}{{ "%.1f"|format(v / 1024) }} KB/s
+{%- else -%}{{ "%.0f"|format(v) }} B/s
+{%- endif -%}
+{% endmacro %}
+{# Two-line down/up (or read/write) throughput cell. #}
+{% macro io_cell(label, down_sym, down_val, up_sym, up_val, title="") %}
+<div style="min-width:80px;flex:0 0 auto;" title="{{ title }}">
+  <div style="font-size:0.62rem;color:var(--text-dim);text-transform:uppercase;letter-spacing:0.03em;">{{ label }}</div>
+  <div style="font-size:0.72rem;font-variant-numeric:tabular-nums;line-height:1.3;">
+    <div>{{ down_sym }} {{ fmt_bps(down_val) }}</div>
+    <div>{{ up_sym }} {{ fmt_bps(up_val) }}</div>
+  </div>
+</div>
+{% endmacro %}
 <div class="host-fleet">
   {% for r in rows %}
   {% set stale = r.stale %}
@@ -40,6 +58,17 @@
       {{ metric_cell("mem", r.mem_used_pct, "%.0f%%", r.sparks.mem, metric_style(r.mem_used_pct), "Memory in use") }}
       {{ metric_cell("disk /", r.disk_root, "%.0f%%", r.sparks.disk, metric_style(r.disk_root), "Root filesystem (/) usage") }}
       {{ metric_cell("load", r.load_1m, "%.2f", r.sparks.load, "", "Load average (1m)") }}
+      {# Extra agent metrics — shown only when the host reports them (VMs/containers
+         often have no temp sensor, etc.) so absent data doesn't clutter the row. #}
+      {% if r.net_rx_bps is not none or r.net_tx_bps is not none %}
+      {{ io_cell("net", "↓", r.net_rx_bps, "↑", r.net_tx_bps, "Network throughput (down / up)") }}
+      {% endif %}
+      {% if r.disk_read_bps is not none or r.disk_write_bps is not none %}
+      {{ io_cell("disk i/o", "rd", r.disk_read_bps, "wr", r.disk_write_bps, "Disk I/O (read / write)") }}
+      {% endif %}
+      {% if r.temp_max is not none %}
+      {{ metric_cell("temp", r.temp_max, "%.0f°C", "", metric_style(r.temp_max, warn=70, crit=85), "Hottest sensor") }}
+      {% endif %}
     </div>
   </div>
   {% endfor %}