Amazon CloudWatch

Amazon CloudWatch is a monitoring service for AWS cloud resources and the applications you run on AWS.

CloudWatch vs CloudTrail:

CloudWatch vs CloudTrail

Used to collect and track metrics, collect and monitor log files, and set alarms.

Automatically react to changes in your AWS resources.

With CloudWatch you can monitor resources such as:

  • EC2 instances.
  • DynamoDB tables.
  • RDS DB instances.
  • Custom metrics generated by applications and services.
  • Any log files generated by your applications.

Gain system-wide visibility into resource utilization.

Monitor application performance.

Monitor operational health.

CloudWatch is accessed via API, command-line interface, AWS SDKs, and the AWS Management Console.

CloudWatch integrates with IAM.

CloudWatch Logs:

  • Amazon CloudWatch Logs lets you monitor and troubleshoot your systems and applications using your existing system, application and custom log files.
  • You can use Amazon CloudWatch Logs to monitor, store, and access your log files from Amazon Elastic Compute Cloud (Amazon EC2) instances, AWS CloudTrail, Route 53, and other sources.
  • CloudWatch Logs can be used for real time application and system monitoring as well as long term log retention.
  • CloudWatch Logs keeps logs indefinitely by default.
  • CloudTrail logs can be sent to CloudWatch Logs for real-time monitoring.
  • CloudWatch Logs metric filters can evaluate CloudTrail logs for specific terms, phrases or values.

CloudWatch retains metric data as follows:

  • Data points with a period of less than 60 seconds are available for 3 hours. These data points are high-resolution custom metrics.
  • Data points with a period of 60 seconds (1 minute) are available for 15 days.
  • Data points with a period of 300 seconds (5 minute) are available for 63 days.
  • Data points with a period of 3600 seconds (1 hour) are available for 455 days (15 months).

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