Overview of CloudWatch Logs and aws log driver

Amazon CloudWatch is an AWS service for monitoring logs from AWS resources, including Amazon ECS, EC2, EBS volumes, Elastic Load Balancers, and RDS. Metrics for CPU utilization, memory utilization, latency, and request counts are streamed in near-real time from these resources to CloudWatch. Some CloudWatch terms and concepts are discussed in the following table:

CloudWatch concept	Description
Log event	A log event, which includes a log message and a timestamp, is a record of some event/activity on a resource or application.
Log stream	A log stream is a continuous sequence of log events from the same resource or application.
Log group	A log group is a group of log streams that share the same retention, monitoring, and access control settings. Each log stream is associated with a single log group, and the log streams in a log group do not have to originate from the same resource or application. More often, the log streams originate from different resources...