Add configuration and playbook for virtualization host setup

- Create host variable file for vh-01.alexpires.dev with user, SSH, firewall, and VM configurations.
- Update playbook_duo_security.yml to target the 2fa group.
- Introduce playbook_virt_host.yml for setting up GPU passthrough on Fedora with QEMU/KVM.
- Add required collections to requirements.yml for Podman and Libvirt.
- Modify ctrlaltdel.yml to remove existing symlink for ctrl-alt-del.target before masking it.
- Enhance users.yml to show warnings for users that could not be removed.
- Update Duo Security role to use the correct repository and package names.
- Improve login role to handle user UID and group assignments.
- Create udev rules template for NVMe devices.
- Add blacklist template for VFIO drivers.
- Implement domain XML template for virtual machines with detailed configurations.
- Update inventory to include vh-01.alexpires.dev in relevant groups.
- Refactor cpu_power_monitor.py for improved error handling and modularity.

scripts/cpu_power_monitor.py

@@ -1,33 +1,38 @@
 import time
 import os
 
-RAPL_PATH = "/sys/class/powercap/intel-rapl:0/energy_uj"
+RAPL_PATH = "/sys/class/powercap/intel-rapl:0/energy_uj" 
+INTERVAL_SEC = 1.0  # configurable via command-line argument or env var
 
-def read_energy():
+def read_energy(path):
     try:
-        with open(RAPL_PATH, "r") as f:
+        with open(path, "r") as f:
             return int(f.read().strip())
     except FileNotFoundError:
-        print(f"Error: {RAPL_PATH} not found.")
-        exit(1)
+        raise RuntimeError(f"RAPL support not available: {path}")
 
-def calculate_power(interval=1.0):
-    print(f"Monitoring CPU package power every {interval} second(s)... (Ctrl+C to stop)")
-    while True:
-        energy_before = read_energy()
-        time.sleep(interval)
-        energy_after = read_energy()
-
-        delta_uj = energy_after - energy_before
-        power_watts = (delta_uj / 1_000_000) / interval
-
-        print(f"Power Usage: {power_watts:.2f} Watts")
+def calculate_power(energy_before, energy_after, interval_sec):
+    delta_uj = energy_after - energy_before
+    power_watts = (delta_uj / 1_000_000) / interval_sec
+    return f"{power_watts:.2f} Watts"
 
 if __name__ == "__main__":
     if os.geteuid() != 0:
         print("Please run this script as root.")
         exit(1)
+    
     try:
-        calculate_power(interval=1.0)
+        # RAPL support check
+        with open(RAPL_PATH, "r") as f:
+            _ = int(f.read().strip())
+        
+        while True:
+            energy_before = read_energy(RAPL_PATH)
+            time.sleep(INTERVAL_SEC)
+            energy_after = read_energy(RAPL_PATH)
+            
+            power_reading = calculate_power(energy_before, energy_after, INTERVAL_SEC)
+            print(f"Power Usage: {power_reading}")
+    
     except KeyboardInterrupt:
         print("\nStopped.")