Section 7: ELB + ASG Flashcards
When would a Gateway Load Balancer by used?
The Gateway Load Balancer operates at Layer 3, so a use case would be to do Intrusion Detection, or a Firewall to inspect to packets coming in. (Any third party network virtual appliances)
What are sticky sessions?
It will proxy the request of the client to the same server.
Which 2 types of cookies can be used to handle Sticky Sessions
Application-based Cookies, custom cookie generated by the target, or Duration-based Cookies generated by the load balancer.
What is connection draining? (Deregistration delay)
Time to complete the ‘in-flight requests’ while the instance in unhealthy. Can be set between 1 to 3600 seconds. Default is 300.
How does Instance Refresh work in Auto Scaling?
When a new launch template is created we can make use of Instance Refresh to set a minimum healthy percentage. Based on this value, new instances will be created using the new launch template until all instances are recreated.
