k8s-manifests/backup-system/mega-quota-exporter.yaml

# Exporter de la cuota de MEGA.
#
# Contexto: el 2026-07-25 la papelera de MEGA (que cuenta cuota) llenó los 20GB
# de la cuenta y tumbó rclone-mega-backup y reddit-intel-backup con "Request
# over quota". El aviso llegó del síntoma (jobs fallidos), no de la causa, que
# llevaba meses engordando en silencio. Esto expone la cuota a Prometheus para
# poder alertar con días de margen.
#
# mega_trash_bytes = usado - visible: es la métrica que habría cazado aquello.
# Con --mega-hard-delete en las rotaciones debería quedarse cerca de 0; si
# vuelve a crecer, es que algún borrado se está yendo a la papelera otra vez.
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: mega-quota-exporter
  namespace: backup-system
data:
  export.sh: |
    #!/bin/sh
    # Imagen BusyBox (rclone) — sin GNU-ismos.
    set -u

    CONF=/rclone/rclone.conf
    OUT=/metrics/metrics
    INTERVAL="${INTERVAL:-900}"

    # Extrae el entero que sigue a "clave". Hay que anclar en la clave y no
    # limpiar la línea entera: `rclone size --json` saca {"count":N,"bytes":M}
    # en una sola línea y un sed global concatenaría los dos números.
    num() { sed -n 's/.*"'"$1"'"[^0-9]*\([0-9][0-9]*\).*/\1/p' "$2" 2>/dev/null | head -1; }

    # Últimos valores buenos: si un scrape falla preferimos republicarlos con
    # success=0 antes que dejar la serie en NoData y disparar un falso positivo.
    L_TOTAL=""; L_USED=""; L_FREE=""; L_VB=""; L_VC=""

    while true; do
      OK=1
      rclone about mega: --json --config "$CONF" > /tmp/about.json 2>/tmp/about.err || OK=0
      rclone size  mega: --json --config "$CONF" > /tmp/size.json  2>/tmp/size.err  || OK=0

      TOTAL=$(num total  /tmp/about.json)
      USED=$(num  used   /tmp/about.json)
      FREE=$(num  free   /tmp/about.json)
      VB=$(num    bytes  /tmp/size.json)
      VC=$(num    count  /tmp/size.json)

      for v in "$TOTAL" "$USED" "$FREE" "$VB" "$VC"; do
        [ -n "$v" ] || OK=0
      done

      if [ "$OK" = "1" ]; then
        L_TOTAL="$TOTAL"; L_USED="$USED"; L_FREE="$FREE"; L_VB="$VB"; L_VC="$VC"
      else
        echo "[$(date '+%Y-%m-%d %H:%M:%S')] scrape fallido: $(cat /tmp/about.err /tmp/size.err 2>/dev/null | tr '\n' ' ')"
      fi

      {
        echo "# HELP mega_quota_scrape_success 1 si el ultimo sondeo a MEGA funciono."
        echo "# TYPE mega_quota_scrape_success gauge"
        echo "mega_quota_scrape_success $OK"
        echo "# HELP mega_quota_last_scrape_timestamp_seconds Momento del ultimo sondeo."
        echo "# TYPE mega_quota_last_scrape_timestamp_seconds gauge"
        echo "mega_quota_last_scrape_timestamp_seconds $(date +%s)"

        if [ -n "$L_TOTAL" ]; then
          TRASH=$((L_USED - L_VB))
          [ "$TRASH" -lt 0 ] && TRASH=0
          echo "# HELP mega_quota_bytes_total Cuota contratada en MEGA."
          echo "# TYPE mega_quota_bytes_total gauge"
          echo "mega_quota_bytes_total $L_TOTAL"
          echo "# HELP mega_quota_bytes_used Espacio consumido (incluye la papelera)."
          echo "# TYPE mega_quota_bytes_used gauge"
          echo "mega_quota_bytes_used $L_USED"
          echo "# HELP mega_quota_bytes_free Espacio libre segun MEGA."
          echo "# TYPE mega_quota_bytes_free gauge"
          echo "mega_quota_bytes_free $L_FREE"
          echo "# HELP mega_visible_bytes Tamano de los ficheros visibles."
          echo "# TYPE mega_visible_bytes gauge"
          echo "mega_visible_bytes $L_VB"
          echo "# HELP mega_visible_objects Numero de ficheros visibles."
          echo "# TYPE mega_visible_objects gauge"
          echo "mega_visible_objects $L_VC"
          echo "# HELP mega_trash_bytes Estimacion de la papelera (usado - visible)."
          echo "# TYPE mega_trash_bytes gauge"
          echo "mega_trash_bytes $TRASH"
        fi
      } > "${OUT}.tmp" && mv "${OUT}.tmp" "$OUT"

      sleep "$INTERVAL"
    done
  nginx.conf: |
    worker_processes 1;
    error_log /dev/stderr warn;
    pid /tmp/nginx.pid;
    events { worker_connections 64; }
    http {
      access_log off;
      client_body_temp_path /tmp/client_body;
      proxy_temp_path /tmp/proxy;
      fastcgi_temp_path /tmp/fastcgi;
      uwsgi_temp_path /tmp/uwsgi;
      scgi_temp_path /tmp/scgi;
      server {
        listen 8080;
        # El fichero no tiene extension: sin esto nginx lo sirve como
        # application/octet-stream y Prometheus se queja del formato.
        default_type text/plain;
        location = /metrics { alias /metrics/metrics; }
        location / { return 404; }
      }
    }
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mega-quota-exporter
  namespace: backup-system
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mega-quota-exporter
  template:
    metadata:
      labels:
        app: mega-quota-exporter
    spec:
      containers:
        - name: rclone
          # OJO: imagen BusyBox — el script debe evitar GNU-ismos
          image: docker.io/rclone/rclone:1.74.3
          command: ["/bin/sh", "/scripts/export.sh"]
          env:
            - name: INTERVAL
              value: "900"
          resources:
            requests:
              cpu: 10m
              memory: 32Mi
            limits:
              cpu: 200m
              memory: 128Mi
          volumeMounts:
            - mountPath: /rclone
              name: rclone-conf
            - mountPath: /scripts
              name: scripts
            - mountPath: /metrics
              name: metrics
        - name: nginx
          image: docker.io/library/nginx:1.27-alpine
          ports:
            - name: metrics
              containerPort: 8080
          resources:
            requests:
              cpu: 10m
              memory: 16Mi
            limits:
              cpu: 100m
              memory: 64Mi
          volumeMounts:
            - mountPath: /etc/nginx/nginx.conf
              name: scripts
              subPath: nginx.conf
            - mountPath: /metrics
              name: metrics
              readOnly: true
          readinessProbe:
            httpGet:
              path: /metrics
              port: metrics
            initialDelaySeconds: 10
            periodSeconds: 20
      volumes:
        # RCLONE_CONF (Infisical /backup-system) contiene mega+b2
        - name: rclone-conf
          secret:
            secretName: rclone-conf-infisical
            items:
              - key: RCLONE_CONF
                path: rclone.conf
        - name: scripts
          configMap:
            name: mega-quota-exporter
            defaultMode: 0755
        - name: metrics
          emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
  name: mega-quota-exporter
  namespace: backup-system
  labels:
    app: mega-quota-exporter
spec:
  selector:
    app: mega-quota-exporter
  ports:
    - name: metrics
      port: 8080
      targetPort: metrics
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: mega-quota-exporter
  namespace: backup-system
  labels:
    # Requerido por serviceMonitorSelector de kube-prometheus-stack
    release: kube-prometheus-stack
spec:
  selector:
    matchLabels:
      app: mega-quota-exporter
  endpoints:
    - port: metrics
      path: /metrics
      interval: 5m