Health checks failed for LB

[arun kumar]

Hi Team,

I have exposed the application using only internal IP of the compute engine . For example if  i curl a localhost/loopback  from VM, connection will be refused ,but if i curl with internal IP ,connection will be establish.

In this case ,Health checks getting failed.Kindly let me know  ,How HC is working in backend.

thanks,

arun

[Ahmad Elias Hamanudin]

Have you configured the required firewall rule for the Health Check IP addresses [1]? Depending on which type type of Load Balancer you are using, it would be:

35.191.0.0/16
130.211.0.0/22

or

35.191.0.0/16
209.85.152.0/22
209.85.204.0/22

Also, here is the success criteria require for a health check to pass and an instance to be considered as healthy [2].

[1] https://cloud.google.com/load-balancing/docs/health-checks#firewall_rules
[2] https://cloud.google.com/load-balancing/docs/health-check-concepts#criteria-protocol-http

Also, Google Groups is reserved for general inquiries related to products. I would advise you to please post your question on Stack Overflow [1] or Server Fault [2] to receive technical assistance. Or if you have a support plan [3], please open a ticket with GCP support.

[1] https://stackoverflow.com/
[2] https://serverfault.com/
[3] https://cloud.google.com/support