Beanstalk Full Environment Disk and Memory Monitoring Deployment Solution

Background

EC2's default CloudWatch metrics do not include disk usage and memory usage, which are the two most common causes of failures.

Implementation Process

1. Write .ebextensions configuration — Create installation and configuration scripts for CloudWatch Agent
2. Configure collection metrics — Disk usage (by mount point), memory usage, available memory
3. Configure CloudWatch Alarm — Disk > 85% alert, memory > 90% alert
4. Aggregate by ASG dimension — New instances automatically included in monitoring
5. Alert notification — SNS -> Lambda -> DingTalk Webhook

Results

• Full coverage across all environments, monthly cost $5-10
• Captured a disk-nearly-full alert in the first week after launch

Technical Points

• .ebextensions is the standard way to customize Beanstalk environments
• Configure alarms by ASG dimension to avoid alarm failure after instance replacement — ClawNOC Operations Agent Practice Notes