Oracle Linux is amazing distro and alternative to Centos. Also support ARM.
It would be great to use this distribution.

+1 for Oracle Linux 8 on ARM processor

OL8 is 100% compatible with RHEL8, so please support it. If not officially, please add a "unsupported" warning and let the user continue the installer.

I am also eager for this response. We want you to officially support Oracle Linux.

Oracle linux 8 is the only valid distribution after the Centos EOL.
please certify it.

Since it is sure Centos 8 will stop existing in December 2021. It would be nice if Plesk would consider supporting Oracle Linux, which also seems to be free and secure like Centos 8. If I read the information on Oracle Linux right, it is even better than Centos, and migrating to Oracle seems not that difficult. They already have the scripts now for some years on Github. Better security for users with Plesk would be appreciated. Please do not hesitate.
Is it already possible to try this with Plesk Obsidian?

This is pretty simple to achieve with a tiny tweak to the OS detection in Plesk:

# diff -u /usr/local/psa/admin/lib/python/os_detect.py.orig /usr/local/psa/admin/lib/python/os_detect.py
--- /usr/local/psa/admin/lib/python/os_detect.py.orig 2015-12-06 07:34:54.152000000 +1100
+++ /usr/local/psa/admin/lib/python/os_detect.py 2015-12-06 07:21:44.224000000 +1100
@@ -100,6 +100,9 @@
elif distname == 'debian':
if "Ubuntu" in issue:
distname = 'ubuntu'
+ elif distname == 'oracle':
+ distname = 'redhat'
+ version_prefix = 'el'

self.os_distname = distname
self.os_version = version

Also very interested in this.
Disclaimer, I only support hosting customers on the side.
I'm puzzled and amazed how they're willingly accepting CentOS even though CentOS doesn't come with CVE data and in the past twice had delays between 1 and 6 months where security patches (and everything else) just didn't come out.
I can't convince myself that everyone supporting CentOS just doesn't give a damn about providing security to their users, but I fall short on ideas.
I know the CentOS continuous release repo exists, I wrote long and friendly howtos about it. It somewhat solves security issues except:
- they still don't sign the CVE data so you can't even tell you're missing an update
- PLESK DOESN'T TEST AGAINST THE CR REPO AND EVERYTHING GOES TO HELL
- Combined you also force people to turn off basic security measures like SELinux, you're putting users at high unneeded risk.

So, put very directly:
THEN it would be helpful to at least support the *free* other RHEL clone that has the security business down well.

IF you encounter any issues supporting it, that would be due to bugs and issues in your own build chain and then it's darn time to clean it up. You're producing business software and you will make your own life a lot easier if it's better tested & portable.
Not to mention you will save, given the large user base, literally hundreds of thousands of hours per year to others. (You have whole knowledge base articles explaining which packages to exclude during updates because otherwise your software breaks. That is a red flag to anyone with experience, but you CAN fix it!)

So, if you can, go ahead and make your life easier.

Hello,

Plesk is supporting many Operating Systems except oracle linux. Even only oracle is not working properly whilst Plesk is installed. Oracle is best database of the world and work 100% fine with oracle linux that unfortunately not supported by the Plesk

Please vote it to convince Plesk to support Oracle Linux

Best regards