libcloud: missing 1 required positional argument error during driver init

Question

I'm using:

• libcloud 2.2.1
• python 3.5.2
• virtualenv
• GCE service account with a json credential file

Python code looks like this:

from libcloud.compute.types import Provider
from libcloud.compute.providers import get_driver


def run():
    """ Run this script
    """
    ComputeEngine = get_driver(Provider.GCE)
    driver = ComputeEngine(user_id='****@****.com',
                           credential_file='serviceaccount.json',
                           project='****')

run()

When I run my code, I'm getting:

Traceback (most recent call last):
  File "./myscript.py", line 47, in <module>
    run()
  File "./myscript.py", line 21, in run
    project='ebs-it', secure=True)
  File "/***/virtualenv/lib/python3.5/site-packages/libcloud/compute/drivers/gce.py", line 1795, in __init__
    super(GCENodeDriver, self).__init__(user_id, key, **kwargs)
  File "/***/virtualenv/lib/python3.5/site-packages/libcloud/common/base.py", line 975, in __init__
    self.connection = self.connectionCls(*args, **conn_kwargs)
TypeError: __init__() missing 1 required positional argument: 'secure'

This looks perfectly textbook to me. Any idea what could be going wrong?

Answer 1

The issue was two fold: unfamiliarity with Google's service accounts, which led to an error in coding.

1. Each service account has an email/ID associated with it, which I only discovered after clicking on 'Manage service accounts' on the Credentials screen. I was mistakenly using my google account as the user_id, since I couldn't figure out what else to put in the field (even though that didn't make sense, but I couldn't see an alternative).
2. After examining the libcloud code, I discovered the credential_file parameter, which seemed to fit better than the key parameter that should be used for the service account file. That is what led to the actual error I was seeing.