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Question 42/70

You set up an autoscaling instance group to serve web traffic for an upcoming launch. After configuring the instance group as a backend service to an HTTP(S) load balancer, you notice that virtual machine (VM) instances are being terminated and re-launched every minute. The instances do not have a public IP address. You have verified the appropriate web response is coming from each instance using the curl command. You want to ensure the backend is configured correctly. What should you do?

Recent Comments (The most recent comments are at the top.)

Eikistein - Sep 03, 2018

C. here are my findings. I spent some time trying to create the scenarios.
A = I reproduced the scenario and guess what ? there is no firewall rule for the load balancer. It does not exist. The LB has no Internal IP. Whatever it comes in HTTP(S):80 to the External IP it gets redirected to the httpproxy/backend/instance using the internal network. The rule that may interfere is the firewall rule to open port 80 of the tagged servers that “belongs” to backend service (vm instances in the instance group).
B = Read carefully what is being porpposed and you will see it does not make any sense
C = It has to be this. The health checker is not able to reach instances
D = I did check and there is no need for the instances to have external ips. Everything worked with no external ips

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