Hi, Juhani. I followed the steps below:
1. yum remove ovirt-release42
2. yum install https://resources.ovirt.org/pub/yum-repo/ovirt-release43.rpm
3. yum update ovirt-node-ng-image-update
4. reboot
5. yum update

and the ovirt-4.2.repo comes back after I reboot the node host.
        

yours Adam
 
From: Juhani Rautiainen
Date: 2019-02-19 21:58
To: adam_xu@adagene.com.cn
CC: ovirtlist; Lucie Leistnerova
Subject: [ovirt-users] Re: How to upgrade ovirt node host?
On Tue, Feb 19, 2019 at 3:30 PM adam_xu@adagene.com.cn
<adam_xu@adagene.com.cn> wrote:
>
> Thank you. Your answer solved my problems.
>  After I installed the big rpm and reboot.  there are two repo files remains  in /etc/yum.repos.d/
> ovirt-4.2-dependencies.repo
> ovirt-4.2.repo
> maybe I should remove the 2 files to avoid any conflicts?
>
I think that they'll disappear if you do
 
yum remove ovirt-release42
 
-Juhani
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