Network
Load Balancers
Spread incoming traffic across several instances to carry the load and survive the failure of any one of them.
What Load Balancers covers
Your choice of algorithm
Round robin, least connections or source address affinity: pick the algorithm that suits your application, and change it without interrupting the service.
Health checks
Every target is polled continuously. An instance that stops answering leaves the rotation and returns as soon as it is healthy again, with no one having to step in.
HTTPS and certificates
TLS terminates on the load balancer, with automatic issuance and renewal of certificates for your domains. Your instances no longer handle keys.