Elastic Load Balancer Health Check Types

Elastic Load Balancing health checks may be anyone of the following:

  • A ping
  • A connection attempt
  • A page request

ELB Connection Draining

An Amazon Elastic Compute Cloud (Amazon EC2) instance registered with an Elastic Load Balancing load balancer using connection draining is deregistered or unhealthy, the following will occur:

  • Keep the connections open to that instance, and attempt to complete in-flight requests.
  • Forcibly close all connections to that instance after a timeout period.

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