High availability app lab03

ALB + Auto Scaling Group (1–3 EC2) · HTTPS · scales out on CPU load, back to 1 at rest

Currently served by i-03182686f9fccfb41

Private IPv4
172.31.20.139
Availability zone
us-east-1c
Hostname
ip-172-31-20-139.ec2.internal

Distinct instances seen (this browser session)

1
Kick off a CPU load test and keep this page open — this number climbs to 3 as the ASG scales out, then drops back to 1 once load stops and the extra instances are terminated.

Live distribution

Polling…

Recent responses

This page polls /api/whoami every ~1.5s over a fresh connection each time, so as the ALB starts routing to newly-launched ASG instances, their IDs appear here live — no manual reload needed. Certificate is self-signed (no public domain available in this AWS Academy account), so your browser may warn once; for the API directly: curl -k.