If I was teaching Server Health 101, I'd start with four key metrics:
- CPU Usage
- Memory Usage
- Network I/O
- Disk Utilization
The approach for fetching these metrics on Linux hosts is tried-and-true (hint: look in the
/proc folder). However, I was curious about Docker Containers: where do I access these critical metrics? What tools does Docker provide? Are there any gotchas?
Read on for what I found.