Tres agujeros que encontro una review adversarial de Codex sobre el trabajo de ayer. Los tres verificados contra el fichero antes de tocar nada. 1. El webhook publico fallaba en ABIERTO. Con `optional: true` y un `if (secreto && ...)`, la ausencia del secreto equivalia a autorizacion: cualquier POST con heartbeat.status=0 y un monitor.name del mapa reiniciaba n8n, Gitea, ArgoCD, Vaultwarden o los blogs. El argumento para dejarlo asi era "que un despiste no te deje sin avisos", y era falso: el aviso de caida lo manda Kuma por su notificacion 1, directa, no por este webhook. Ahora el secreto es obligatorio (sin `optional`) y la puerta rechaza si falta. Secreto ausente da error ruidoso; cabecera que no casa, vacio. 2. El ClusterRole permitia patch sobre CUALQUIER deployment de 10 namespaces, y la SA va montada en el pod entero de n8n: cualquier workflow con un nodo Code heredaba eso. Ahora son Roles por namespace con resourceNames sobre los 12 workloads exactos del SERVICE_MAP. 3. El flujo daba exito aunque el PATCH fallara. `restartOk` se calculaba y se tiraba: `K8s API Check Status` construia un objeto nuevo sin el, y el IF final solo miraba `statusOk`. Un 403 sobre un servicio ya sano mandaba "reiniciado correctamente". Ahora hay rama de fallo tras el PATCH y el exito exige observedGeneration >= la generation que devolvio el PATCH. Se compara con >= porque selfHeal de ArgoCD revierte la anotacion y vuelve a subir la generation; con == daria un fallo falso. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
350 lines
17 KiB
JSON
350 lines
17 KiB
JSON
{
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"name": "Uptime Kuma → K8s Auto-Restart",
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"nodes": [
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{
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"parameters": {
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"httpMethod": "POST",
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"path": "uptime-kuma-restart",
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"options": {}
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},
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"id": "d1a2b3c4-1111-1111-1111-000000000001",
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"name": "Uptime Kuma Webhook",
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"type": "n8n-nodes-base.webhook",
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"typeVersion": 1,
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"position": [
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256,
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304
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],
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"webhookId": "uptime-kuma-restart"
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},
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{
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"parameters": {
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"jsCode": "// Puerta de entrada (2026-07-30, cerrada de verdad el 2026-07-31). Este webhook\n// es PUBLICO y reinicia servicios, los dos blogs incluidos. Uptime Kuma manda el\n// secreto en la cabecera X-Kuma-Token (notificacion \"n8n Auto-Restart\" ->\n// webhookAdditionalHeaders).\n//\n// FAIL-CLOSED. Hasta el 2026-07-31 esto seguia adelante SIN comprobar nada si el\n// secreto no estaba configurado, con el argumento de \"que un despiste no te deje\n// sin avisos\". El argumento era falso: el aviso de caida lo manda Kuma por su\n// notificacion 1 (Telegram, directa), no por aqui. Cerrar no cuesta ni un aviso,\n// solo el reinicio automatico; dejarlo abierto hacia que la ausencia de\n// credencial valiera como autorizacion en un endpoint expuesto a internet.\n//\n// Las dos negativas NO son iguales, a proposito:\n// - secreto ausente -> error RUIDOSO. Es un fallo de configuracion propio\n// y tiene que verse en la lista de ejecuciones, no morir en silencio.\n// - cabecera que no casa -> vacio y a callar. Es un desconocido llamando al\n// endpoint: ni respuesta, ni filas de error que engordar a base de POSTs.\nlet secreto = null;\ntry { secreto = $env.KUMA_WEBHOOK_TOKEN; } catch (e) { /* $env capado */ }\nif (!secreto && typeof process !== 'undefined') secreto = process.env.KUMA_WEBHOOK_TOKEN;\n\nif (!secreto) {\n throw new Error('KUMA_WEBHOOK_TOKEN no configurado: rechazo el webhook (fail-closed).');\n}\n\nconst cabeceras = $input.first().json.headers || {};\nif (cabeceras['x-kuma-token'] !== secreto) {\n return [];\n}\n\nconst body = $input.first().json.body || $input.first().json;\nconst monitor = body.monitor || {};\nconst heartbeat = body.heartbeat || {};\n\n// Solo lo que existe de verdad en el cluster (revisado 2026-07-30): fuera\n// OpenClaw, los tres polymarket-* y open-webui, decomisados en julio.\n// 'kind' es el plural que va en la ruta del API: Gitea es un StatefulSet,\n// no un Deployment, y con 'deployments' fijo daba 404 aunque hubiera permisos.\nconst SERVICE_MAP = {\n 'n8n': { kind: 'deployments', name: 'n8n', namespace: 'n8n' },\n 'Vaultwarden': { kind: 'deployments', name: 'vaultwarden', namespace: 'vaultwarden' },\n 'Grafana': { kind: 'deployments', name: 'kube-prometheus-stack-grafana', namespace: 'monitoring' },\n 'Uptime Kuma': { kind: 'deployments', name: 'uptime-kuma', namespace: 'monitoring' },\n 'Authentik': { kind: 'deployments', name: 'authentik-server', namespace: 'authentik' },\n 'Homarr': { kind: 'deployments', name: 'homarr', namespace: 'homarr' },\n 'ArgoCD': { kind: 'deployments', name: 'argocd-server', namespace: 'argocd' },\n 'ArgoCD repo-server': { kind: 'deployments', name: 'argocd-repo-server', namespace: 'argocd' },\n 'Ollama': { kind: 'deployments', name: 'ollama', namespace: 'ollama' },\n 'Gitea': { kind: 'statefulsets', name: 'gitea', namespace: 'gitea' },\n // Los blogs (2026-07-30). La clave es el NOMBRE EXACTO del monitor en Kuma,\n // que se busca sin distinguir mayusculas -- si se renombra alli, aqui deja de\n // encontrarse y el workflow se va por la rama de \"sin mapeo\".\n // El monitor \"www.zonadeexclusion.com (301->apex)\" queda FUERA a proposito:\n // que ese 301 falle es cosa de Traefik o del DNS, no de Ghost, y reiniciar el\n // blog no arreglaria nada.\n 'theexclusionzone.com (Ghost EN)': { kind: 'deployments', name: 'ghost-en', namespace: 'ghost-en' },\n 'zonadeexclusion.com (Ghost ES)': { kind: 'deployments', name: 'zona-exclusion', namespace: 'zona-exclusion' },\n};\n\nconst serviceName = monitor.name || 'desconocido';\nconst status = heartbeat.status;\n\nif (status !== 0) {\n return [];\n}\n\n// Busqueda case-insensitive\nconst k8s = SERVICE_MAP[serviceName] ||\n Object.entries(SERVICE_MAP).find(([k]) => k.toLowerCase() === serviceName.toLowerCase())?.[1];\n\nif (!k8s) {\n return [{ json: {\n serviceName,\n canRestart: false,\n error: 'Sin mapeo K8s para: ' + serviceName\n }}];\n}\n\n// Se sigue llamando 'deployment' aunque a veces sea un StatefulSet: el nodo IF\n// \"Tiene mapeo K8s\" comprueba ese campo, y renombrarlo lo romperia en silencio.\nreturn [{ json: {\n serviceName,\n canRestart: true,\n deployment: k8s.name,\n kind: k8s.kind,\n namespace: k8s.namespace\n}}];\n"
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},
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"id": "d1a2b3c4-2222-2222-2222-000000000002",
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"name": "Parse & Map Service",
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"type": "n8n-nodes-base.code",
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"typeVersion": 2,
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"position": [
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480,
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304
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]
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},
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{
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"parameters": {
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"conditions": {
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"string": [
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{
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"value1": "={{ $json.deployment || '' }}",
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"operation": "isNotEmpty"
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}
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]
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}
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},
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"id": "d1a2b3c4-3333-3333-3333-000000000003",
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"name": "Tiene mapeo K8s",
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"type": "n8n-nodes-base.if",
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"typeVersion": 1,
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]
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},
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{
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"parameters": {
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"jsCode": "const https = require('https');\nconst fs = require('fs');\n\nconst token = fs.readFileSync('/var/run/secrets/kubernetes.io/serviceaccount/token', 'utf8').trim();\nconst ca = fs.readFileSync('/var/run/secrets/kubernetes.io/serviceaccount/ca.crt');\n\nconst deployment = $input.first().json.deployment;\nconst namespace = $input.first().json.namespace;\nconst serviceName = $input.first().json.serviceName;\n// Sin kind, deployments: asi un workflow viejo en vuelo no se rompe.\nconst kind = $input.first().json.kind || 'deployments';\n\nconst now = new Date().toISOString();\nconst patchBody = JSON.stringify({\n spec: { template: { metadata: { annotations: { 'kubectl.kubernetes.io/restartedAt': now } } } }\n});\n\nreturn new Promise((resolve) => {\n const req = https.request({\n hostname: 'kubernetes.default.svc',\n port: 443,\n path: `/apis/apps/v1/namespaces/${namespace}/${kind}/${deployment}`,\n method: 'PATCH',\n headers: {\n 'Authorization': `Bearer ${token}`,\n 'Content-Type': 'application/strategic-merge-patch+json',\n 'Content-Length': Buffer.byteLength(patchBody)\n },\n ca\n }, (res) => {\n let data = '';\n res.on('data', c => data += c);\n res.on('end', () => {\n const ok = res.statusCode >= 200 && res.statusCode < 300;\n // La generation que devuelve el PATCH es la NUEVA. Guardarla permite\n // comprobar despues que el rollout de ESTE patch se completo, en vez\n // de conformarse con que el servicio este sano (podia estarlo ya).\n let generation = null;\n try { generation = JSON.parse(data).metadata.generation; } catch (e) { /* cuerpo no JSON */ }\n resolve([{ json: { serviceName, deployment, kind, namespace,\n restartOk: ok, statusCode: res.statusCode, generation,\n error: ok ? null : String(data || '').slice(0, 200) } }]);\n });\n });\n req.on('error', (e) => resolve([{ json: { serviceName, deployment, kind, namespace,\n restartOk: false, statusCode: null, generation: null, error: e.message } }]));\n req.write(patchBody);\n req.end();\n});"
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},
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"id": "d1a2b3c4-4444-4444-4444-000000000004",
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"name": "K8s API Restart",
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"type": "n8n-nodes-base.code",
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"typeVersion": 2,
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"position": [
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912,
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192
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]
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},
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{
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"parameters": {
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"amount": 60,
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"unit": "seconds"
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},
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"id": "d1a2b3c4-5555-5555-5555-000000000005",
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"name": "Esperar 60s",
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"type": "n8n-nodes-base.wait",
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"typeVersion": 1,
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"position": [
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1344,
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192
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],
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"webhookId": "wait-resume-uptime-001"
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},
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{
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"parameters": {
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"jsCode": "const https = require('https');\nconst fs = require('fs');\n\nconst token = fs.readFileSync('/var/run/secrets/kubernetes.io/serviceaccount/token', 'utf8').trim();\nconst ca = fs.readFileSync('/var/run/secrets/kubernetes.io/serviceaccount/ca.crt');\n\nconst deployment = $input.first().json.deployment;\nconst namespace = $input.first().json.namespace;\nconst serviceName = $input.first().json.serviceName;\n// Sin kind, deployments: asi un workflow viejo en vuelo no se rompe.\nconst kind = $input.first().json.kind || 'deployments';\nconst generation = $input.first().json.generation;\n\nreturn new Promise((resolve) => {\n const req = https.request({\n hostname: 'kubernetes.default.svc',\n port: 443,\n path: `/apis/apps/v1/namespaces/${namespace}/${kind}/${deployment}`,\n method: 'GET',\n headers: { 'Authorization': `Bearer ${token}` },\n ca\n }, (res) => {\n let data = '';\n res.on('data', c => data += c);\n res.on('end', () => {\n try {\n const dep = JSON.parse(data);\n const desired = dep.spec.replicas || 1;\n const ready = dep.status.readyReplicas || 0;\n const updated = dep.status.updatedReplicas || 0;\n // Que este sano no prueba que se haya reiniciado: si el PATCH no\n // hubiera surtido efecto, un servicio que ya estaba bien daria\n // 'exito' igual. observedGeneration >= la generation que devolvio\n // el PATCH significa que el controlador ya proceso ESE cambio.\n // Se compara con >= y no con == a proposito: ArgoCD (selfHeal)\n // revierte la anotacion restartedAt poco despues, lo que sube la\n // generation otra vez. Con == eso daria un fallo falso.\n const observed = dep.status.observedGeneration || 0;\n const rolloutOk = generation == null ? true : observed >= generation;\n const statusOk = ready >= desired && updated >= desired && rolloutOk;\n resolve([{ json: { serviceName, deployment, kind, namespace, statusOk,\n ready, desired, generation, observed, rolloutOk } }]);\n } catch (e) {\n resolve([{ json: { serviceName, deployment, kind, namespace, statusOk: false, error: e.message } }]);\n }\n });\n });\n req.on('error', (e) => resolve([{ json: { serviceName, deployment, kind, namespace, statusOk: false, error: e.message } }]));\n req.end();\n});"
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},
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"id": "d1a2b3c4-6666-6666-6666-000000000006",
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"name": "K8s API Check Status",
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"type": "n8n-nodes-base.code",
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"typeVersion": 2,
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{
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"parameters": {
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"conditions": {
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"string": [
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{
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"value1": "={{ $json.statusOk ? 'yes' : 'no' }}",
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"value2": "yes"
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}
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]
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}
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},
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"id": "d1a2b3c4-7777-7777-7777-000000000007",
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"name": "Reinicio Exitoso",
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"type": "n8n-nodes-base.if",
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"typeVersion": 1,
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]
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},
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{
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"parameters": {
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"method": "POST",
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"url": "=https://api.telegram.org/bot{{ $env.TELEGRAM_BOT_TOKEN }}/sendMessage",
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"sendBody": true,
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"bodyParameters": {
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"parameters": [
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{
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"name": "chat_id",
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"value": "5138407666"
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},
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{
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"name": "text",
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"value": "={{ '✅ Servicio *' + $json.serviceName + '* caído detectado — reiniciado correctamente' }}"
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},
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{
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"name": "parse_mode",
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"value": "Markdown"
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}
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]
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},
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"options": {}
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},
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"id": "d1a2b3c4-8888-8888-8888-000000000008",
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"name": "Telegram Exito",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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"position": [
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2000,
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80
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]
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},
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{
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"parameters": {
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"method": "POST",
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"url": "=https://api.telegram.org/bot{{ $env.TELEGRAM_BOT_TOKEN }}/sendMessage",
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"sendBody": true,
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"bodyParameters": {
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"parameters": [
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{
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"name": "chat_id",
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"value": "5138407666"
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},
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{
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"name": "text",
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"value": "={{ '❌ Servicio *' + $json.serviceName + '* caído — reinicio fallido, intervención manual necesaria' + ($json.statusCode ? ' (HTTP ' + $json.statusCode + ')' : '') + ($json.error ? ': ' + String($json.error).replace(/[*_`\\[\\]]/g, '').slice(0, 200) : '') + ($json.rolloutOk === false ? ' — el PATCH pasó pero el rollout no llegó a completarse' : '') }}"
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},
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{
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"name": "parse_mode",
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"value": "Markdown"
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}
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]
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},
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"options": {}
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},
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"id": "d1a2b3c4-9999-9999-9999-000000000009",
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"name": "Telegram Fallo",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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"position": [
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2000,
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]
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},
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{
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"parameters": {
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"method": "POST",
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"url": "=https://api.telegram.org/bot{{ $env.TELEGRAM_BOT_TOKEN }}/sendMessage",
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"sendBody": true,
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"bodyParameters": {
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"parameters": [
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{
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"name": "chat_id",
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"value": "5138407666"
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},
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{
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"name": "text",
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"value": "={{ '⚠️ Alerta Uptime Kuma: Servicio *' + $json.serviceName + '* caído pero sin mapeo K8s configurado. No se puede reiniciar automáticamente.' }}"
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},
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{
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"name": "parse_mode",
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"value": "Markdown"
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}
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]
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},
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"options": {}
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},
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"id": "d1a2b3c4-aaaa-aaaa-aaaa-00000000000a",
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"name": "Telegram Sin Mapeo",
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"type": "n8n-nodes-base.httpRequest",
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"typeVersion": 4,
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{
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"parameters": {
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"conditions": {
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"string": [
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{
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"value1": "={{ $json.restartOk ? 'yes' : 'no' }}",
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"value2": "yes"
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}
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]
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}
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},
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"id": "d1a2b3c4-bbbb-bbbb-bbbb-00000000000b",
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"name": "PATCH aceptado",
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"type": "n8n-nodes-base.if",
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]
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}
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],
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"connections": {
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"Uptime Kuma Webhook": {
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"main": [
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[
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{
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"node": "Parse & Map Service",
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"type": "main",
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"index": 0
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}
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]
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]
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},
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"Parse & Map Service": {
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"main": [
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[
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{
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"node": "Tiene mapeo K8s",
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"type": "main",
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"index": 0
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}
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]
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]
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},
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"Tiene mapeo K8s": {
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"main": [
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[
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{
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"node": "K8s API Restart",
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"type": "main",
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"index": 0
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}
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],
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[
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{
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"node": "Telegram Sin Mapeo",
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"type": "main",
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"index": 0
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}
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]
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]
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},
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"K8s API Restart": {
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"main": [
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[
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{
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"node": "PATCH aceptado",
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"type": "main",
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"index": 0
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}
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]
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]
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},
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"Esperar 60s": {
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"main": [
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[
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{
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"node": "K8s API Check Status",
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"type": "main",
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"index": 0
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}
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]
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]
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},
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"K8s API Check Status": {
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"main": [
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[
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{
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"node": "Reinicio Exitoso",
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"type": "main",
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"index": 0
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}
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]
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]
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},
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"Reinicio Exitoso": {
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"main": [
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[
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{
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"node": "Telegram Exito",
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"type": "main",
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"index": 0
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}
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],
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[
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{
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"node": "Telegram Fallo",
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"type": "main",
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"index": 0
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}
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]
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]
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},
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"PATCH aceptado": {
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"main": [
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[
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{
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"node": "Esperar 60s",
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"type": "main",
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"index": 0
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}
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],
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[
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{
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"node": "Telegram Fallo",
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"type": "main",
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"index": 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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"settings": {
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"executionOrder": "v1",
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"callerPolicy": "workflowsFromSameOwner",
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"availableInMCP": false,
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"binaryMode": "separate"
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},
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"_activeVersionId": "ebe6d3e6-5cf8-4265-9435-2a63fd555748",
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"_workflowId": "m8fZG86J5JJzVQn9"
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} |