Hi Narcis,

  Looks like our attempts to dissuade you didn't work.  😂  I'm not sure
why you needed to use Debian 9.  Yes, you were able to do it, but now you
have a few potential issues to keep in mind:

Take a look here:.
https://www.reddit.com/r/debian/comments/45frah/remove_systemd_how/

Keep in mind, that was written over a year ago.  Systemd is now much deeper
ingrained.

Second, any system tools or programs that rely on kernel version 4.x will
now break.  Most likely these would be firewall related.  So, any kernel
4.x dependencies might now be broken.  You can check what those are by
listening the dependencies for the 4.x kernel. See here:.
https://unix.stackexchange.com/questions/296196/how-to-upgrade-kernel-with-all-dependencies-in-debian

Specifically: apt-cache show linux-image-amd64

You'd be much, much better off using Centos 6 or OpenVZ 7.  If you insist
on Debian, I suggest you try Devuan, which is Debian 9 based, but has
systemd completely removed.

I suggest that wiki page be edited with these warnings as well.

Good luck!  :)

On Jul 11, 2017 10:42 PM, "Narcis Garcia" <informat...@actiu.net> wrote:

Alexey, Vasily, you were wrong.
The only barrier in Debian 8 is systemd, and the only additional barrier
in Debian 9 is default Ext4 feature "64bit".

Following the initrd/mount message, I applied a comment from StalkR:
upgrading from Debian 8.
I've installed a clean Debain 8 (with Ext4), upgraded to Debian 9, and
then OpenVZ 6 installs and works (without compiling anything).

https://openvz.org/Installation_on_Debian_9



El 11/07/17 a les 12:24, Alexey Zilber ha escrit:
> It won't work.  Please go through the two earlier responses.   Debian 9
> doesn't use initrd, so it will never work.
>  Ext4 version is the least of your provlems.
>
> On Jul 11, 2017 6:06 PM, "Narcis Garcia" <informat...@actiu.net
> <mailto:informat...@actiu.net>> wrote:
>
>     I've debugged initrd steps, and localized an error in this action:
>     $ mount -r -t ext4  /dev/sda1 /root
>     EXT4-fs (sda1): error loading journal
>     mount: Invalid argument
>
>     If I try there same command without readonly option:
>     $ mount -t ext4  /dev/sda1 /root
>     EXT4-fs (sda1): couldn't mount RDWR because of unsupported optional
>     features (400)
>     mount: Invalid argument
>
>     I see that Debian 9 installer formats Ext4 with two extra features
that
>     Debian 8 didn't:
>     64bit metadata_csum
>
>     Does anybody know how to "downgrade" Ext4 to remove those 2 features?
>
>
>     El 08/07/17 a les 16:13, Narcis Garcia ha escrit:
>     > Install procedure:
>     >
>     > RepoFile=/etc/apt/sources.list.d/openvz.list
>     > RepoUrl=http://download.openvz.org/debian
>     <http://download.openvz.org/debian>
>     > echo "deb $RepoUrl jessie main" | sudo tee "$RepoFile"
>     > echo "deb $RepoUrl wheezy main" | sudo tee -a "$RepoFile"
>     > wget -qO - http://ftp.openvz.org/debian/archive.key
>     <http://ftp.openvz.org/debian/archive.key> | sudo apt-key add -
>     > sudo apt --allow-unauthenticated update
>     > KPackage="linux-image-openvz-$(dpkg --print-architecture)"
>     > sudo apt --install-recommends install $KPackage ploop
initramfs-tools
>     > if [ ! -d /vz ] ; then sudo ln -s /var/lib/vz/ /vz ; fi
>     > sudo reboot
>     >
>     > Attaching screenshots.
>     > - Tested with 042stab123.8 and 042stab123.9
>     > - Tested with amd64 binaries
>     > - Tested both in virtual machine and real hardware
>     > - Tested both with single plain ext4 partition (sda1 on /) and
>     with LVM
>     > layers.
>     > - initrd works, next boot stage not (fstab).
>     >
>     >
>     >
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