I am also struggling with this as I try to install a self-hosted engine.  I 
have read every thread in the forum and tried all the suggestions.

Here is my most recent attempt (RHEL 8.5, installing oVirt 4.4):
Start the hosted engine deployment, then run the command [ # dnf downgrade 
postgresql-jdbc ] from a virsh console, to downgrade postgresql as soon as the 
packages are done updating.  The downgrade appears to be successful, however 
the system still fails at 'Check if engine health page is up'.  Restarting the 
oVirt engine [ # systemctl restart oVirt-engine ] immediately after downgrading 
postgresql does not make any difference.  The system times out at the 'Check if 
engine health page is up'.  The log entry where the latest failure started to 
occur is below.  I can include the entire log if needed.  Interestingly, the 
status was 503 this time.  In many prior attempts that status was 500.

2022-05-06 09:42:49,744-0400 ERROR 
otopi.ovirt_hosted_engine_setup.ansible_utils ansible_utils._process_output:110 
fatal: [localhost -> 192.168.222.150]: FAILED! => {"attempts": 30, "changed": 
false, "connection": "close", "content": "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD 
HTML 2.0//EN\">\n<html><head>\n<title>503 Service 
Unavailable</title>\n</head><body>\n<h1>Service Unavailable</h1>\n<p>The server 
is temporarily unable to service your\nrequest due to maintenance downtime or 
capacity\nproblems. Please try again later.</p>\n</body></html>\n", 
"content_length": "299", "content_type": "text/html; charset=iso-8859-1", 
"date": "Fri, 06 May 2022 13:42:49 GMT", "elapsed": 0, "msg": "Status code was 
503 and not [200]: HTTP Error 503: Service Unavailable", "redirected": false, 
"server": "Apache/2.4.37 (centos) OpenSSL/1.1.1k mod_auth_gssapi/1.6.1 
mod_wsgi/4.6.4 Python/3.6", "status": 503, "url": 
http://localhost/ovirt-engine/services/health}

I would like to know if anyone has had success doing a fresh install of a 
self-hosted environment since the postgresql issue arose.  If so, any pointers 
would be greatly appreciated.  If I get this working I will follow up with 
exactly what I did.




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