GCP Region issue

[anurag082]

I have set up the attack range on my Mac and connected to GCP. However, when I run the attack command, it gives the below error.

Traceback (most recent call last):
File "/Users/a/Desktop/s/attack_range/attack_range.py", line 349, in
main(sys.argv[1:])
~~~~^^^^^^^^^^^^^^
File "/Users/a/Desktop/s/attack_range/attack_range.py", line 345, in main
return args.func(args)
~~~~~~~~~^^^^^^
File "/Users/a/Desktop/s/attack_range/attack_range.py", line 73, in simulate
controller.simulate(args.engine, args.target, args.technique, args.playbook)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/a/Desktop/s/attack_range/modules/gcp_controller.py", line 143, in simulate
simulation_controller.simulate(target, technique)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
File "/Users/a/Desktop/s/attack_range/modules/art_simulation_controller.py", line 62, in simulate
target_public_ip = gcp_service.get_single_instance_public_ip(
target,
self.config["general"]["key_name"],
self.config["gcp"]["region"],
)
File "/Users/a/Desktop/s/attack_range/modules/gcp_service.py", line 102, in get_single_instance_public_ip
.network_interfaces[0]
^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'network_interfaces'

even though I have this config in the YML
region: europe-west3
zone: europe-west3-a

[P4T12ICK]

We just have a new release of Attack Range v5 including a UI and API. Can you try it again? thank you.

[janderik]

A few suggestions for making the GCP instance lookup more robust in gcp_service.py:get_single_instance_public_ip:

1. Add a null-check with a helpful error message:

def get_single_instance_public_ip(self, name, zone):
    instance = self.compute.instances().get(
        project=self.project, zone=zone, instance=name
    ).execute()

    if not instance:
        raise RuntimeError(
            f"GCP instance '{name}' not found in zone '{zone}'. "
            "Verify the instance name and zone are correct in your config."
        )

    network_interfaces = instance.get('networkInterfaces', [])
    if not network_interfaces:
        raise RuntimeError(
            f"Instance '{name}' has no network interfaces. "
            "Check that the instance was created with a network interface."
        )
    # ... rest of IP extraction

2. Add retry logic with exponential backoff for the GCP API call, since transient 429s/503s are common:

import time

def _get_instance_with_retry(self, name, zone, max_retries=3, base_delay=1.0):
    for attempt in range(max_retries):
        try:
            return self.compute.instances().get(
                project=self.project, zone=zone, instance=name
            ).execute()
        except googleapiclient.errors.HttpError as e:
            if e.resp.status in (429, 500, 503) and attempt < max_retries - 1:
                time.sleep(base_delay * (2 ** attempt))
                continue
            raise

3. Validate region/zone consistency in your config validation step — ensure the zone string matches the region prefix (e.g., us-central1-a starts with us-central1). This prevents confusing errors where the API returns empty results because the zone doesn't exist in the specified region.