Compute - Using ELB and Auto Scaling Together

Question 1

What is the relationship between ELBs and EC2 auto scaling?

Answer 1

• ELBs and EC2 auto scaling go hand in hand to provide optimal efficiency.
• ELBs allow dynamic load management across resources based on target groups and rules.
• EC2 auto scaling allows elastic scaling of target groups based on infrastructure demand.
• Combining ELBs and auto scaling helps manage and automatically scale EC2 compute resources.

Question 2

What happens if you have an ELB configured without auto scaling?

Answer 2

• Manual addition and removal of targets based on demand.
• Manual monitoring and adjustment of instances as required.

Question 3

What happens if you have EC2 auto scaling configured without an ELB?

Answer 3

• Uneven distribution of traffic to EC2 fleet.
• Lack of load balancing capabilities.

Question 4

How does attaching an ELB to an auto scaling group benefit operations?

Answer 4

• ELB automatically detects instances and distributes traffic to the auto scaling group.
• Application load balancer or network load balancer is associated with the auto scaling group through the target group.
• Classic load balancer directly registers the EC2 fleet.

Question 5

How do you associate an existing load balancer with an auto scaling group?

Answer 5

• Go to the EC2 dashboard and select “Auto Scaling Groups” under Compute.
• Select the desired auto scaling group and click on “Actions” and then “Edit”.
• Under “Classic Load Balancers and Target Groups” section, select the appropriate load balancer or target group.
• Save the changes to associate the load balancer with the auto scaling group.