Abstract
With more cloud customers are storing their data in multiple Cloud Service Providers (CSPs), they are responsible for managing the data in the multi-cloud storage environment, including monitoring the events on the cloud. They could monitor various cloud storage services by collecting, processing, and analyzing the cloud storage log files generated by multiple CSPs. In this paper, we investigate the feasibility of log-based monitoring for multi-cloud storage systems. We evaluate the current state of cloud object storage services and their logging functionality by analyzing cloud storage log files generated by a proof-of-concept cloud storage broker system using the three largest public CSPs: Amazon Web Services, Google Cloud Platform, and Microsoft Azure. We discover the logging functionality of cloud storage services could create severe security and reliability issues for cloud customers monitoring the multi-cloud storage systems due to cloud storage log files might not record unauthenticated and unauthorized requests with unpredictable delivery time.
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