Install using the iso as you would, and if you can, try to grab the image update rpm for 4.1.8 [1], and just install it with `rpm -Uhv`.
If you'd rather use the iso, you will need to mount it, and install the ovirt-node-ng squashfs in the same manner that the image-update rpm installs it (rpm -qp --scripts path-to-image-update.rpm).

[1] http://resources.ovirt.org/pub/ovirt-4.1/rpm/el7/noarch/ovirt-node-ng-image-update-4.1.8-1.el7.centos.noarch.rpm


On Sun, Jan 7, 2018 at 7:57 PM, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:
and I want to simulate install of 4.1.7 from the iso and then update of the ng node to 4.1.8 without internet access but using in some way the 4.1.8 iso (or something derived from it) on my local lan, how can I do?

Thanks,
Gianluca

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