list-gce.py

# List GCE instances
# Official GCP SDK (Python) Documentation: https://googleapis.github.io/google-api-python-client/docs/dyn/

import json
import sys
import argparse
from googleapiclient import discovery
from oauth2client.client import GoogleCredentials
from google.cloud import resource_manager

client = resource_manager.Client()

credentials = GoogleCredentials.get_application_default()
compute = discovery.build('compute', 'v1', credentials=credentials)

# Filter of Projects that will be scanned 
parser_args = argparse.ArgumentParser(description='Define the projetc_id filter.'
'if empity will looking for all the active project_id that the credential have access.'
'Support for comma separeted projects')
parser_args.add_argument('--project')
project_filter = parser_args.parse_args()

# Project parameter validation
project_valid = []
if project_filter.project is None:
    env_filter = {'lifecycleState': 'ACTIVE' }
    for project_param in client.list_projects(env_filter):
        project_valid.append(project_param.project_id)
else:
    project_list = project_filter.project.split(',')
    for project_listed in project_list:
        env_filter = {'projectId': project_listed ,'lifecycleState': 'ACTIVE' }
        for project_param in client.list_projects(env_filter):
            project_valid.append(project_param.project_id)

# print csv header
print ('project_id;zone;instance_name;cpuPlatform;machineType;',
'status;lastStartTimestamp;preemptible;automaticRestart;onHostMaintenance;',
'disk_amount;disk_total_size;publicIP;nic_amount;creationTimestamp')

for project_validated in project_valid:
    try:
        zone_request = compute.zones().list(project=project_validated)        
        zones = zone_request.execute()
        #print(zones)

        for zone in zones['items']:

            resp = compute.instances().list(project=project_validated, zone=zone.get('name')).execute()
            #print(resp)
            try:
                for gce in resp['items']:
                    diskAmt = diskSiz =0
                    ipAmt = 0
                    ipExt = 'None'

                    for disk in gce['disks']:
                        diskAmt +=1
                        diskSiz = diskSiz + float(disk.get('diskSizeGb'))

                    for accessConfig in gce['networkInterfaces']:
                        ipAmt +=1
                        try:
                            for nats in accessConfig['accessConfigs']:
                                if nats.get('type',{}) == 'ONE_TO_ONE_NAT':
                                    ipExt=nats.get('natIP')                                            
                        except KeyError: pass                                       
                    
                    # Remove the full url for machineType
                    machineTypeUrl=gce.get('machineType').split(sep="/")
                    machineType=machineTypeUrl[len(machineTypeUrl)-1]
            
                    
                    print (
                        project_validated, ';',
                        #project.name, ';',
                        zone.get('name'),';',
                        gce.get('name'), ';',                 
                        gce.get('cpuPlatform'), ';',
                        machineType, ';',
                        gce.get('status'), ';',
                        gce.get('lastStartTimestamp'), ';',
                        gce.get('scheduling').get('preemptible'), ';',
                        gce.get('scheduling').get('automaticRestart'), ';',
                        gce.get('scheduling').get('onHostMaintenance'), ';',                    
                        diskAmt, ';',
                        diskSiz, ';',
                        ipExt, ';',
                        ipAmt, ';',
                        gce.get('creationTimestamp')
                        )
                        
                    
            except KeyError: pass
    except: pass