Configurar Top-Rack como ajuste global

DOCUMENTACION.md

@@ -248,6 +248,7 @@ Ubicacion fisica o logica. Actualmente se muestra en la tarjeta.
 Por SSH se leen datos de solo lectura:
 
 - Temperatura CPU
+- Temperatura Top-Rack opcional desde archivo JSON escrito por Node-RED
 - Uso CPU
 - Uso RAM
 - Uso disco raiz `/`
@@ -262,6 +263,34 @@ Por SSH se leen datos de solo lectura:
 - Velocidad nominal si existe
 - Trafico RX/TX calculado entre scans
 
+### Temperatura Top-Rack
+
+Si una RPi tiene un sensor externo de temperatura del rack, Node-RED puede escribir la lectura en un archivo local del mismo equipo:
+
+```json
+{
+  "temperatureC": 23.7,
+  "sensor": "rack-top",
+  "updatedAt": "2026-06-05T21:12:18.997Z"
+}
+```
+
+En el configurador, usa la seccion general `Temperatura Top-Rack`:
+
+```text
+RPi origen: RPi - MeshCore · 192.168.0.60
+Path JSON temperatura: /home/yamaray/monitor-rpi/rack-temp.json
+```
+
+La configuracion se guarda como:
+
+```text
+rackTemperatureSourceDeviceId: rpi3-meshcore
+rackTemperatureFile: /home/yamaray/monitor-rpi/rack-temp.json
+```
+
+El backend lee ese archivo durante el mismo scan SSH y muestra el valor como `Temperatura Top-Rack` en la primera linea del dashboard.
+
 ## Clientes Activos
 
 El dashboard envia heartbeat al backend cuando esta visible.

config.example.json

@@ -5,6 +5,8 @@
   "sshTimeoutSeconds": 8,
   "sshPrivateKeyPath": "/ssh/monitor_rpi_ed25519",
   "sshPublicKeyPath": "/ssh/monitor_rpi_ed25519.pub",
+  "rackTemperatureSourceDeviceId": "rpi3-meshcore",
+  "rackTemperatureFile": "/home/yamaray/monitor-rpi/rack-temp.json",
   "temperatureThresholdsC": {
     "warning": 60,
     "hot": 70,

config.html

@@ -502,6 +502,17 @@
           <input id="sshTimeoutSeconds" type="number" min="2" step="1">
         </label>
       </div>
+      <div class="ssh-key-panel">
+        <h2>Temperatura Top-Rack</h2>
+        <div class="ssh-key-fields">
+          <label title="RPi desde el que el monitor leera el archivo JSON de temperatura. Se muestra nombre e IP para identificarlo rapido.">RPi origen
+            <select id="rackTemperatureSourceDeviceId"></select>
+          </label>
+          <label title="Path del archivo JSON en el RPi origen. Node-RED debe escribir ahi la ultima temperatura.">Path JSON temperatura
+            <input id="rackTemperatureFile" placeholder="/home/yamaray/monitor-rpi/rack-temp.json">
+          </label>
+        </div>
+      </div>
       <div class="ssh-key-panel">
         <h2>Clave SSH del monitor</h2>
         <div class="ssh-key-fields">
@@ -716,6 +727,16 @@
       document.querySelector("#refreshIntervalSeconds").value = state.config.refreshIntervalSeconds || 30;
       document.querySelector("#idleScanIntervalSeconds").value = state.config.idleScanIntervalSeconds || 300;
       document.querySelector("#sshTimeoutSeconds").value = state.config.sshTimeoutSeconds || 8;
+      const rackSource = document.querySelector("#rackTemperatureSourceDeviceId");
+      rackSource.innerHTML = [
+        `<option value="">Sin sensor Top-Rack</option>`,
+        ...state.config.devices.map((device) => {
+          const value = device.id || device.host || device.name || "";
+          const label = `${device.name || value} · ${device.host || "sin IP"}`;
+          return `<option value="${value}" ${state.config.rackTemperatureSourceDeviceId === value ? "selected" : ""}>${label}</option>`;
+        })
+      ].join("");
+      document.querySelector("#rackTemperatureFile").value = state.config.rackTemperatureFile || "";
       document.querySelector("#sshPrivateKeyPath").value = state.config.sshPrivateKeyPath || "/ssh/monitor_rpi_ed25519";
       document.querySelector("#sshPublicKeyPath").value = state.config.sshPublicKeyPath || `${document.querySelector("#sshPrivateKeyPath").value}.pub`;
       document.querySelector("#warningTemp").value = state.config.temperatureThresholdsC?.warning || 60;
@@ -741,6 +762,8 @@
       state.config.refreshIntervalSeconds = Number(document.querySelector("#refreshIntervalSeconds").value || 30);
       state.config.idleScanIntervalSeconds = Number(document.querySelector("#idleScanIntervalSeconds").value || 300);
       state.config.sshTimeoutSeconds = Number(document.querySelector("#sshTimeoutSeconds").value || 8);
+      state.config.rackTemperatureSourceDeviceId = document.querySelector("#rackTemperatureSourceDeviceId").value || "";
+      state.config.rackTemperatureFile = document.querySelector("#rackTemperatureFile").value || "";
       state.config.sshPrivateKeyPath = document.querySelector("#sshPrivateKeyPath").value || "/ssh/monitor_rpi_ed25519";
       state.config.sshPublicKeyPath = document.querySelector("#sshPublicKeyPath").value || `${state.config.sshPrivateKeyPath}.pub`;
       state.config.temperatureThresholdsC = {

dashboard.html

@@ -282,7 +282,7 @@
 
     .summary {
       display: grid;
-      grid-template-columns: repeat(5, minmax(130px, 1fr));
+      grid-template-columns: repeat(6, minmax(120px, 1fr));
       gap: 12px;
     }
 
@@ -981,6 +981,14 @@
               hottestSummaryClass(summary.hottest.value, temperatureThresholds)
             )
           : summaryItem("Mas caliente", "--"),
+        summary.rackTemperature
+          ? summaryItemWithNote(
+              "Temperatura Top-Rack",
+              `${summary.rackTemperature.temperatureC.toFixed(1)} C`,
+              summary.rackTemperature.deviceName || summary.rackTemperature.sensor || "",
+              hottestSummaryClass(summary.rackTemperature.temperatureC, temperatureThresholds)
+            )
+          : summaryItem("Temperatura Top-Rack", "--"),
         summaryItem("Total RPi configuradas", summary.total || 0),
         summaryItem("Alertas", summary.alerts?.length || 0, summary.alerts?.length > 0 ? "summary-hot" : "")
       ].join("");

docs.html

@@ -149,6 +149,17 @@ chmod 600 ~/.ssh/authorized_keys</code></pre>
     <pre><code>0 clientes visibles  -> idleScanIntervalSeconds
 1+ clientes visibles -> refreshIntervalSeconds</code></pre>
 
+    <h2>Temperatura Top-Rack</h2>
+    <p>Si una RPi tiene un sensor externo del rack, Node-RED puede escribir la lectura en un archivo JSON local.</p>
+    <pre><code>{
+  "temperatureC": 23.7,
+  "sensor": "rack-top",
+  "updatedAt": "2026-06-05T21:12:18.997Z"
+}</code></pre>
+    <p>En el configurador, usa la seccion general <code>Temperatura Top-Rack</code>:</p>
+    <pre><code>RPi origen: RPi - MeshCore · 192.168.0.60
+Path JSON temperatura: /home/yamaray/monitor-rpi/rack-temp.json</code></pre>
+
     <h2>Docker</h2>
     <pre><code>cd /home/yamaray/docker/monitorRPi
 docker compose up -d --build</code></pre>

server.js

@@ -49,6 +49,7 @@ async function readConfig() {
   parsed.temperatureThresholdsC = normalizeTemperatureThresholds(parsed.temperatureThresholdsC);
   parsed.metricThresholdsPercent = normalizeMetricThresholds(parsed.metricThresholdsPercent);
   parsed.devices = Array.isArray(parsed.devices) ? parsed.devices.map(normalizeDeviceConfig) : [];
+  normalizeRackTemperatureConfig(parsed);
   return parsed;
 }
 
@@ -65,6 +66,7 @@ async function writeConfig(nextConfig) {
     metricThresholdsPercent: normalizeMetricThresholds(nextConfig.metricThresholdsPercent),
     devices: Array.isArray(nextConfig.devices) ? nextConfig.devices.map(normalizeDeviceConfig) : []
   };
+  normalizeRackTemperatureConfig(normalized);
   await fs.mkdir(path.dirname(CONFIG_PATH), { recursive: true });
   await fs.writeFile(CONFIG_PATH, JSON.stringify(normalized, null, 2) + "\n", "utf8");
   config = normalized;
@@ -80,6 +82,19 @@ function normalizeDeviceConfig(device = {}) {
   };
 }
 
+function normalizeRackTemperatureConfig(nextConfig) {
+  nextConfig.rackTemperatureSourceDeviceId = String(nextConfig.rackTemperatureSourceDeviceId || "");
+  nextConfig.rackTemperatureFile = String(nextConfig.rackTemperatureFile || "");
+
+  if (!nextConfig.rackTemperatureSourceDeviceId || !nextConfig.rackTemperatureFile) {
+    const legacyDevice = nextConfig.devices.find((device) => device.rackTemperatureFile);
+    if (legacyDevice) {
+      nextConfig.rackTemperatureSourceDeviceId = legacyDevice.id || "";
+      nextConfig.rackTemperatureFile = legacyDevice.rackTemperatureFile || "";
+    }
+  }
+}
+
 function classifyTemp(tempC) {
   const thresholds = config.temperatureThresholdsC || {};
   if (tempC >= (thresholds.critical || 80)) return "critical";
@@ -130,6 +145,7 @@ function mockMetrics(device) {
   const temp = seededNumber(`${device.id}:temp`, baseTemp - 4, baseTemp + 18);
   const dockerRole = /docker|gitea|nginx/i.test(device.role || "");
   const haRole = /home assistant/i.test(device.role || "");
+  const rackTemperatureFile = rackTemperatureFileForDevice(device);
 
   return {
     cpuTempC: Number(temp.toFixed(1)),
@@ -165,12 +181,22 @@ function mockMetrics(device) {
       speedMbps: device.model === "RPi 3" ? null : 1000,
       rxBytesPerSecond: Math.round(seededNumber(`${device.id}:rx`, 1200, 95000)),
       txBytesPerSecond: Math.round(seededNumber(`${device.id}:tx`, 700, 55000))
-    }
+    },
+    rackTemperature: rackTemperatureFile
+      ? {
+          temperatureC: Number(seededNumber(`${device.id}:rack-temp`, 25, 37).toFixed(1)),
+          sensor: "rack-top",
+          updatedAt: new Date().toISOString(),
+          ageSeconds: 0,
+          sourceFile: rackTemperatureFile
+        }
+      : null
   };
 }
 
 const REMOTE_METRICS_SCRIPT = `
 set +e
+rack_temperature_file="$RACK_TEMPERATURE_FILE"
 temp_raw="$(cat /sys/class/thermal/thermal_zone0/temp 2>/dev/null)"
 if [ -n "$temp_raw" ]; then
   temp_c="$(awk "BEGIN { printf \\"%.1f\\", $temp_raw / 1000 }")"
@@ -259,6 +285,27 @@ if [ "$ha_status" = "n/a" ] && [ "$docker_installed" = "1" ]; then
   fi
 fi
 
+rack_temperature_c=""
+rack_temperature_sensor=""
+rack_temperature_updated_at=""
+rack_temperature_age_seconds=""
+if [ -n "$rack_temperature_file" ] && [ -r "$rack_temperature_file" ]; then
+  rack_payload="$(cat "$rack_temperature_file" 2>/dev/null)"
+  rack_temperature_c="$(printf '%s' "$rack_payload" | awk -F '[:,}]' '/temperatureC/ { gsub(/[^0-9.\\-]/, "", $2); print $2; exit }')"
+  if [ -z "$rack_temperature_c" ]; then
+    rack_temperature_c="$(printf '%s' "$rack_payload" | awk 'NR==1 { gsub(/[^0-9.\\-]/, "", $1); print $1; exit }')"
+  fi
+  rack_temperature_sensor="$(printf '%s' "$rack_payload" | sed -n 's/.*"sensor"[[:space:]]*:[[:space:]]*"\\([^"]*\\)".*/\\1/p' | head -n 1)"
+  rack_temperature_updated_at="$(printf '%s' "$rack_payload" | sed -n 's/.*"updatedAt"[[:space:]]*:[[:space:]]*"\\([^"]*\\)".*/\\1/p' | head -n 1)"
+  if [ -n "$rack_temperature_updated_at" ]; then
+    rack_updated_epoch="$(date -d "$rack_temperature_updated_at" +%s 2>/dev/null)"
+    now_epoch="$(date +%s 2>/dev/null)"
+    if [ -n "$rack_updated_epoch" ] && [ -n "$now_epoch" ] && [ "$now_epoch" -ge "$rack_updated_epoch" ]; then
+      rack_temperature_age_seconds="$((now_epoch - rack_updated_epoch))"
+    fi
+  fi
+fi
+
 printf 'cpuTempC=%s\\n' "$temp_c"
 printf 'cpuCores=%s\\n' "$cpu_cores"
 printf 'cpuUsagePercent=%s\\n' "$cpu_usage"
@@ -283,6 +330,10 @@ printf 'dockerRunning=%s\\n' "$docker_running"
 printf 'dockerStopped=%s\\n' "$docker_stopped"
 printf 'dockerUnhealthy=%s\\n' "$docker_unhealthy"
 printf 'homeAssistantStatus=%s\\n' "$ha_status"
+printf 'rackTemperatureC=%s\\n' "$rack_temperature_c"
+printf 'rackTemperatureSensor=%s\\n' "$rack_temperature_sensor"
+printf 'rackTemperatureUpdatedAt=%s\\n' "$rack_temperature_updated_at"
+printf 'rackTemperatureAgeSeconds=%s\\n' "$rack_temperature_age_seconds"
 `;
 
 function parseKeyValueOutput(output) {
@@ -301,6 +352,17 @@ function toNumber(value, fallback = 0) {
   return Number.isFinite(parsed) ? parsed : fallback;
 }
 
+function shellQuote(value) {
+  return `'${String(value || "").replace(/'/g, `'\\''`)}'`;
+}
+
+function rackTemperatureFileForDevice(device) {
+  const sourceId = config.rackTemperatureSourceDeviceId || "";
+  const sourceMatches = sourceId && [device.id, device.host, device.name].includes(sourceId);
+  if (sourceMatches) return config.rackTemperatureFile || "";
+  return device.rackTemperatureFile || "";
+}
+
 function networkRates(device, values) {
   const sampleKey = device.id || `${device.host}:${device.port || 22}`;
   const now = Date.now();
@@ -333,9 +395,12 @@ function networkRates(device, values) {
   };
 }
 
-function runCommandWithInput(command, args, input, timeoutMs) {
+function runCommandWithInput(command, args, input, timeoutMs, env = {}) {
   return new Promise((resolve, reject) => {
-    const child = spawn(command, args, { stdio: ["pipe", "pipe", "pipe"] });
+    const child = spawn(command, args, {
+      stdio: ["pipe", "pipe", "pipe"],
+      env: { ...process.env, ...env }
+    });
     let stdout = "";
     let stderr = "";
     let settled = false;
@@ -428,9 +493,12 @@ async function sshMetrics(device) {
     ];
   }
 
-  const { stdout } = await runCommandWithInput(command, args, REMOTE_METRICS_SCRIPT, timeoutMs);
+  const rackTemperatureFile = rackTemperatureFileForDevice(device);
+  const remoteScript = `RACK_TEMPERATURE_FILE=${shellQuote(rackTemperatureFile)}\n${REMOTE_METRICS_SCRIPT}`;
+  const { stdout } = await runCommandWithInput(command, args, remoteScript, timeoutMs);
   const values = parseKeyValueOutput(stdout);
   const temp = toNumber(values.cpuTempC, 0);
+  const rackTemperatureC = toNumber(values.rackTemperatureC, null);
   const loadAverage = String(values.loadAverage || "")
     .split(/\s+/)
     .filter(Boolean)
@@ -460,7 +528,16 @@ async function sshMetrics(device) {
       detected: values.homeAssistantStatus && values.homeAssistantStatus !== "n/a",
       status: values.homeAssistantStatus || "n/a"
     },
-    network: networkRates(device, values)
+    network: networkRates(device, values),
+    rackTemperature: Number.isFinite(rackTemperatureC)
+      ? {
+          temperatureC: Number(rackTemperatureC.toFixed(1)),
+          sensor: values.rackTemperatureSensor || "",
+          updatedAt: values.rackTemperatureUpdatedAt || "",
+          ageSeconds: toNumber(values.rackTemperatureAgeSeconds, null),
+          sourceFile: rackTemperatureFile
+        }
+      : null
   };
 }
 
@@ -520,6 +597,15 @@ function buildSummary(devices) {
     .filter((device) => device.metrics && Number.isFinite(device.metrics.cpuTempC))
     .map((device) => ({ name: device.name, value: device.metrics.cpuTempC }));
   const hottest = temps.sort((a, b) => b.value - a.value)[0] || null;
+  const rackTemperature = online
+    .map((device) => {
+      const rack = device.metrics?.rackTemperature;
+      return rack && Number.isFinite(rack.temperatureC)
+        ? { ...rack, deviceName: device.name }
+        : null;
+    })
+    .filter(Boolean)
+    .sort((a, b) => (a.ageSeconds ?? Number.MAX_SAFE_INTEGER) - (b.ageSeconds ?? Number.MAX_SAFE_INTEGER))[0] || null;
   const alerts = [];
 
   for (const device of devices) {
@@ -537,6 +623,7 @@ function buildSummary(devices) {
     online: online.length,
     offline: active.length - online.length,
     hottest,
+    rackTemperature,
     alerts
   };
 }