Hello Kim,
                   as it says in the documentation a SHE setup  is more complex to maintain, see the following about upgrades, configuration changes and backups.
https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.3/html/administration_guide/chap-administering_the_self-hosted_engine

https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.3/html/administration_guide/chap-backups_and_migration#Backing_up_and_Restoring_a_Self-hosted_Engine

Also there doesn't seem to be any documentation to move from back from SHE to a standalone engine.

Regards,
                Paul S.
From: Strahil Nikolov <hunter86_bg@yahoo.com>
Sent: 26 March 2020 15:14
To: users@ovirt.org <users@ovirt.org>; kim.kargaard@noroff.no <kim.kargaard@noroff.no>
Subject: [ovirt-users] Re: bare-metal to self-hosted engine
 
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On March 26, 2020 12:24:21 PM GMT+02:00, kim.kargaard@noroff.no wrote:
>Hi,
>
>We currently have an ovirt engine running on a server. The server has
>CentOS installed and the ovirt-engine installed, but is not a node that
>hosts VM's. I would like to move the ovirt-engine to a self-hosted
>engine and it seems like this articles is the one to follow:
>https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ovirt.org%2Fdocumentation%2Fself-hosted%2Fchap-Migrating_from_Bare_Metal_to_an_EL-Based_Self-Hosted_Environment.html&amp;data=02%7C01%7Cp.staniforth%40leedsbeckett.ac.uk%7Cb8c8f8c52d35493eaf1008d7d198d2e2%7Cd79a81124fbe417aa112cd0fb490d85c%7C0%7C0%7C637208326609022043&amp;sdata=CBludiNwfUpA6%2Bbg7ndcC28Sd64uL8BCAZucZBBPZ6Q%3D&amp;reserved=0
>Am I correct that I can migrate from a bare-metal CentOS server engine
>to a self-hosted VM of the engine and is the documentation above the
>only documentation I will need to complete this process?
>
>Kind regards
>
>Kim
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Hi Kim,

The link is https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ovirt.org%2Fdocumentation%2Fmigrating_from_a_standalone_manager_to_a_self-hosted_engine%2F&amp;data=02%7C01%7Cp.staniforth%40leedsbeckett.ac.uk%7Cb8c8f8c52d35493eaf1008d7d198d2e2%7Cd79a81124fbe417aa112cd0fb490d85c%7C0%7C0%7C637208326609022043&amp;sdata=Xz1oW%2BSeGq8F2xZGNh89rdXFlTxSuUazg3IF5zqUjZI%3D&amp;reserved=0 and it seems OK.
Also,  you can take a look at https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Faccess.redhat.com%2Fdocumentation%2Fen-us%2Fred_hat_virtualization%2F4.3%2Fhtml-single%2Fmigrating_from_a_standalone_manager_to_a_self-hosted_engine%2Findex&amp;data=02%7C01%7Cp.staniforth%40leedsbeckett.ac.uk%7Cb8c8f8c52d35493eaf1008d7d198d2e2%7Cd79a81124fbe417aa112cd0fb490d85c%7C0%7C0%7C637208326609022043&amp;sdata=WL4YLvQU4YKAyDN8VFeUqdKNU%2F6Lu2EvsZmSoR13ExU%3D&amp;reserved=0

I would recommend you to:
A)  creare a backup of the engine
B) create a test setup (for example in VMs) to prepare yourself for the process.

Best Regards,
Strahil Nikolov
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