You must not use localhost.
Check A/AAAA and PTR records for the engine. 

Best Regards,
Strahil Nikolov

Hi,
I'm having an issue with Failed to validate the SSL certificate for localhost:443 during Deploy "hosted-engine."

check the log files, found this error:
"
[TASK] [ovirt.engine-setup: Check if Engine health page is up]
[ERROR] fatal:[localhost -> my_fqdn.domain]:FAILED!=>{"attempts":12, "changed":false,"msg":"Failed to validate the SSL certificate for localhost:443.
Make sure your managed systems have a valid CA certificate installed.
You can use validate_certs=False if you do not need to confirm the servers identity but this is unsafe and not recommended.
Paths checked for this patform: /etc/ssl/certs, /etc/pki/ca-trust/extracted/pem, /etc/pki/tls/certs, /usr/share/ca-certificates/cacert.org, /etc/ansible.
The exception msg was: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:618).", "status": -1, "url": "http://localhost/ovirt-engine/services/health"}
"

NOTE: ovirt engine VERSION "ovirt-engine-appliance-4.3-20200603.1.0.2.el7.x86_64"

We tried googling to resolve this issue but, unfortunately, unsuccessfully.
Can someone help us to solve our critical issue?

Best regards,
Bunnatee
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