Logging in GCP and locally

问题

I am building a system that is intended to run on Virtual Machines in Google Cloud Platform. However, as a form of backup, it may be run locally as well. That being said, my issue currently is with logging. I have two loggers, both work, a local logger and a cloud logger.

Cloud logger

import google.cloud.logging
from google.cloud.logging.handlers import CloudLoggingHandler
from google.oauth2 import service_account

CREDS = google.cloud.logging.Client(
        project=PROJECT, credentials=service_account.Credentials.from_service_account_file(CREDENTIAL_FILE))

class GoogleLogger(CloudLoggingHandler):

    def __init__(self, client=CREDS):
        super(GoogleLogger, self).__init__(client)

def setup_logging():
    """
    This function can be invoked in order to setup logging based on a yaml config in the 
    root dir of this project
    """
    try:
        # with open('logging.yaml', 'rt') as f:
        with open(LOGGING_CONFIG, 'rt') as f:
            config = yaml.safe_load(f.read())
            f.close()
        logging.config.dictConfig(config)
    except Exception:
        print('Error in Logging Configuration. Using default configs')
        print(traceback.format_exc())
        logging.basicConfig(level=logging.INFO)

logging.yaml

version: 1

formatters:
    simple:
        format: "%(name)s - %(lineno)d -  %(message)s"

    complex:
        format: "%(asctime)s - %(name)s | %(levelname)s | %(module)s : [%(filename)s: %(lineno)d] - %(message)s"

    json:
        class: logger.JsonFormatter

handlers:
    console:
        class: logging.StreamHandler
        level: DEBUG
        formatter: complex

    cloud:
        class: logger.GoogleLogger
        formatter: json
        level: INFO

loggers:

    cloud:
        level: INFO
        handlers: [console,cloud]
        propagate: yes

    __main__:
        level: DEBUG
        handlers: [console]
        propagate: yes

I use setup_logging() to set everything up like so:

setup_logging()
logger = logging.getLogger(<type_of_logger>)

can be "cloud" or "__main__"

"main" only logs locally, "cloud" logs both to GCP Stackdriver Logs and locally.

Now if I'm not running on GCP, an error gets thrown here:

CREDS = google.cloud.logging.Client(
        project=PROJECT, credentials=service_account.Credentials.from_service_account_file(CREDENTIAL_FILE))

What is the best way around this? The class GoogleLogger(CloudLoggingHandler): always gets run, and if isn't in GCP it breaks.

An idea is to wrap the class in a try/except block, but that sounds like a horrible idea. How do I make my code smart enough to choose which logger automatically? And if running locally, completely ignore the GoogleLogger?

Edit (Traceback)

File "import_test.py", line 2, in <module>
    from logger import setup_logging
  File "/Users/daudn/Documents/clean_space/tgs_workflow/utils/logger.py", line 16, in <module>
    class GoogleLogger(CloudLoggingHandler):
  File "/Users/daudn/Documents/clean_space/tgs_workflow/utils/logger.py", line 23, in GoogleLogger
    project=PROJECT, credentials=service_account.Credentials.from_service_account_file(CREDENTIAL_FILE))
  File "/usr/local/lib/python3.7/site-packages/google/cloud/logging/client.py", line 123, in __init__
    self._connection = Connection(self, client_info=client_info)
  File "/usr/local/lib/python3.7/site-packages/google/cloud/logging/_http.py", line 39, in __init__
    super(Connection, self).__init__(client, client_info)
TypeError: __init__() takes 2 positional arguments but 3 were given

来源：https://stackoverflow.com/questions/59545446/logging-in-gcp-and-locally