Seeing that MariaDB 10.3 works in Onyx even though it's not officially supported - i wonder did any of you guys tried to upgrade MariaDB 10.3 (which is shipped with CentOS 8) to MariaDB 10.4 before Obsidan installation?
We haven't, yet... (see below as to why) However, within the user's comments section of the page we posted the link to (above) user name Jan Bludau has, posted 6/6/2019 and it's on a CentOS server too if that helps?
I am trying to understand why Obsidian is not supporting 10.4 but 10.3 is supported. Is it that much different for them? Reading ar MariaDB website it doesn't seem drastically different.
Queue some "vague" explanations
being posted soon. On many third party components; 'Not Supported - Factual Reasons Not Given' is the default endless loop, but then and with no advance notice given, it's suddenly chnaged to Bang! "
xyz component IS now fully supported" << This seems to be the usual Plesk way.
FWIW Once all the lastest bugs have been ironed out, more improvements added and it switches over to General Release status (potentially sometime in November we believe) then we'll probably... upgrade to Obsidian for real (as opposed to doing a test upgrade, but then reverting back to Onyx) However, to answer your original question, if you were already running MariaDB 10.4 prior to your Onyx > Obsidian upgrade and which, don't forget, is not officially supported by either Onyx OR Obsidian, well you can see the ready made Plesk escape route if / when that upgrade fails...
So my only assumption is that Plesk Obsidian support MariaDB 10.3 because that version is shipped with OS per default. I guess they want to avoid ticket generation or something like that.
Yeah, we'd agree with that assumption
Although, to be fair, IF you raise a ticket and ask for Plesk support to assist you with an update that's not officially supported, Plesk can be very, very helpful indeed, but quite understandably, it is done all at your own risk
EDIT: Since adding this ^^ post, Obsidian has already been released at GA status. We've therefore upgraded Plesk now and there were no issues (for us) with the MariaDB 10.3 Onyx > MariaDB 10.3 > Obsidian upgrade.