GCP Health check not working with VM (Cent OS 7)

Question

I've been running a Compute engine for over a year now without issues. Everything works fine and centos 7 is fully updated. I'm running plesk as hosting software and server is accessible over http and https.

I just setup a Health check in GCP with the following settings:

• name: healtcheckname
• In use by: servername
• Path: /
• Protocol: HTTPS
• Port: 443
• Interval: 5 seconds
• Timeout: 5 seconds
• Unhealthy threshold: 2 consecutive failures
• Healthy threshold: 2 consecutive successes

However it seems to return a 0 not successful. This limits me on using a load balancer with GCE and I was wondering if someone can offer some help. I already added the following firewall rule:

• Network: default
• Source IP ranges 130.211.0.0/22 and 35.191.0.0/16
• Allowed protocols and ports tcp

Answer 1

Found the answer, had to update the Path: / to something that always has a respons: /wp-login.php