← Back to Concepts
Health Checks & Load Balancing
Explore how systems monitor service health and distribute traffic across healthy instances
Controls
Load Balancing Strategy
Health Check Settings
5s
3 failures
Try This:
- Send several requests and observe how they are distributed based on the load balancing strategy
- Toggle an instance to unhealthy and watch traffic automatically avoid it
- Compare round-robin vs least-connections strategies with uneven traffic
- Mark all instances unhealthy and observe how requests fail when no healthy instances are available
Load Balancer
3/3 HEALTHY
🌐
Load Balancer
round-robin
Service Instances
✅
Instance 1
Response: 100ms • Active: 0
HEALTHY
Failures
0/3
Last Check
0s ago
Requests
0
✅
Instance 2
Response: 120ms • Active: 0
HEALTHY
Failures
0/3
Last Check
0s ago
Requests
0
✅
Instance 3
Response: 90ms • Active: 0
HEALTHY
Failures
0/3
Last Check
0s ago
Requests
0
Recent Requests
No completed requests yet
How it works:
- Health Checks: System periodically checks instance health
- Failure Detection: After 3 consecutive failures, instance marked unhealthy
- Load Balancing: Traffic only routed to healthy instances
- Auto Recovery: Unhealthy instances automatically recover when health checks pass
Metrics
Total
0
Success
0
Failed
0
Success Rate
0%
Progress6 of 6