AWS OpenSearch, a project derived from Elastic's Elasticsearch and Kibana, is an open-source alternative developed by Amazon that integrates with various AWS services for data ingestion. It supports storing and analyzing observability data, such as logs, metrics, and traces, and offers multiple ingestion methods, including AWS Kinesis Firehose, AWS CloudWatch, LogStash, AWS Lambda, and AWS IoT. Each method has its own advantages and challenges, with choices depending on specific use cases and existing infrastructure. While OpenSearch can enhance DevOps teams' ability to troubleshoot and perform log analysis, implementing machine learning for log analytics can be resource-intensive. For those seeking a quicker setup without extensive engineering effort, platforms like Coralogix offer advanced capabilities in log analysis and alerting within the AWS ecosystem.