Set Python Logging to Azure Blob, but Can not Find Log File there

Question

I'm setting up logging on a flask service. I tried to write logs to an azure blob storage with the following code

import logging
import sys

from azure_storage_logging.handlers import BlobStorageRotatingFileHandler

logger = logging.getLogger('service_logger')
logger.setLevel(logging.DEBUG)
log_formater = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(process)d - %(message)s')
azure_blob_handler = BlobStorageRotatingFileHandler(filename = 'service.log', 
                                                    account_name='servicestorage',
                                                    account_key='',
                                                    maxBytes= maxBytes,
                                                    container='service-log')
azure_blob_handler.setLevel(logging.INFO)
azure_blob_handler.setFormatter(log_formater)
logger.addHandler(azure_blob_handler)

Then, I tried with logger.warning('test warning'), but there's not log file created on the azure blob container.

Can anyone help me figure out where I did wrong?

Best, Eigen

Thanks for your following. I figures out that the azure blob I first tried is for China market. The logging works when I connect to global azure blob. Any way to point the logging handler to azure blob in China market? — eigen
– eigen, Commented Aug 3, 2018 at 2:05

Jay Gong · Accepted Answer · 2018-07-30 07:35:47Z

5

I tried your code in my flask but did't reproduce your issue.

code:

@app.route('/log')
def log():

    import logging
    import sys
    from azure_storage_logging.handlers import BlobStorageRotatingFileHandler

    mystorageaccountname='***'
    mystorageaccountkey='***'

    logger = logging.getLogger('service_logger')
    logger.setLevel(logging.DEBUG)
    log_formater = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(process)d - %(message)s')
    azure_blob_handler = BlobStorageRotatingFileHandler(filename = 'service.log', 
                                                        account_name=mystorageaccountname,
                                                        account_key=mystorageaccountkey,
                                                        maxBytes= 5,
                                                        container='service-log')
    azure_blob_handler.setLevel(logging.INFO)
    azure_blob_handler.setFormatter(log_formater)
    logger.addHandler(azure_blob_handler)

    logger.warning('warning message')

output:

More details, you could refer to the doc and source code.

Hope it helps you. Any concern,please let me know.

answered Jul 30, 2018 at 7:35

Jay Gong

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1 Comment

leocrimson Over a year ago

there is problem that it does not upload if the content does not reach till maxBytes. And irrespective of size it should not upload results after logging ends.

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