Beginner’s Guide: How to Send AWS CloudWatch Logs to S3 via Kinesis Firehose

AWS CloudWatch Logs is a service for collecting and storing logs from various AWS resources, aiding in monitoring and troubleshooting. However, for long-term storage, data analysis, or compliance, it can be beneficial to send these logs to Amazon S3. This process can be automated using Amazon Kinesis Data Firehose, a fully managed service that streams real-time data to destinations like S3 without complex coding. By sending logs to S3, businesses can leverage its durable, low-cost storage capabilities, facilitate data analysis with AWS services like Athena, and ensure compliance through strong access controls. The guide provides a step-by-step process to set up this integration, including sending logs to CloudWatch using a Python script, creating a Kinesis Firehose delivery stream, and setting up a subscription filter to stream logs to S3. Verifying the logs' presence in the S3 bucket confirms the setup's success. Additionally, using OpenObserve offers an alternative by storing data in S3 in a compressed parquet format, simplifying long-term retention and analysis without additional work.

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