create_gcloud_hosts_entries.py

#!/bin/env python

# make sure to be logged in with `gcloud init`

# Add to /etc/hosts:
# python create_gcloud_hosts_entries.py | sudo tee -a /etc/hosts

from oauth2client.client import GoogleCredentials
from googleapiclient import discovery

PROJECT = 'magnetic-icon-88807'

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


def list_instances(compute, zone, project=PROJECT):
    result = compute.instances().list(project=project, zone=zone).execute()
    return result.get('items', [])


def get_zones(compute, project=PROJECT):
    zones = compute.zones().list(project=project).execute()
    return [z['name'] for z in zones['items']]


print('# atomx google cloud entries\n')
for zone in get_zones(compute):
    for instance in list_instances(compute, zone):
        name = instance['name']
        ip = instance['networkInterfaces'][0]['accessConfigs'][0].get('natIP')
        if not ip:
            print('# skipping {name}'.format(name=name))
            continue
        print('{ip} {name} {name}.atomx {name}.atomx.com'.format(ip=ip, name=name))