spark: add disk usage checker script

wizard-work/spark/disk_usage.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+"""Quick disk usage checker - returns JSON for easy parsing."""
+import json
+import shutil
+
+def get_disk_usage():
+    """Get disk usage for root partition."""
+    total, used, free = shutil.disk_usage("/")
+    return {
+        "partition": "/",
+        "total_gb": round(total / (1024**3), 2),
+        "used_gb": round(used / (1024**3), 2),
+        "free_gb": round(free / (1024**3), 2),
+        "percent_used": round((used / total) * 100, 1),
+        "status": "ok" if (used / total) < 0.8 else "warning" if (used / total) < 0.9 else "critical"
+    }
+
+if __name__ == "__main__":
+    result = get_disk_usage()
+    print(json.dumps(result, indent=2))
+    # Exit with special code based on status
+    exit(0 if result["status"] == "ok" else 2 if result["status"] == "warning" else 3)