[PVE-User] md installer?

Adam Hunt voxadam at gmail.com
Thu Jul 4 19:46:58 CEST 2013


My understanding was that PVE does not now and will never in the future
support the softraid capabilities of Linux. If RAID is wanted than the only
option is old-school hardware RAID.


On Thu, Jul 4, 2013 at 5:29 AM, Paul Gray <gray at cs.uni.edu> wrote:

> On 07/04/2013 06:30 AM, Paul Gray wrote:
> > I think, I may be wrong, that the Barebone Installer is not customizable
> at all, and won't be.
>
> The installer is configurable to the extent that any distribution's
> installer iso is configurable.  You just need to know where the
> installation components are and how they interact.
>
> The origin of my question to the list arises from the hints of md
> support already in the places within the installation.
>
> After ISOLINUX expands the initrd and finds its proxmox iso image, the
> init script invokes /sbin/unconfigured.sh on the ISO mount.
>
> In the final acts of /sbin/unconfigured.sh, there's a commented-out line
> to shut off md device md0, indicating that there was once a time when it
> was enabled.
>
> But there's quite a bit more: For example, after proxmox finds the
> installation media and starts up X, the installation contiues from
> openbox/.xinitrc to invoke /usr/bin/proxinstall.
>
> Within the /usr/bin/proxinstall script, one finds this code in the
> probing for disks:
>
>     foreach my $hd (@$hds) {
>         my ($disk, $devname) = @$hd;
>         next if $devname =~ m|^/dev/md\d+$|;
>         print "found Disk$disk N:$devname\n";
>     }
>
> So the installer is specifically excluding md devices when looking for
> disks.
>
> Naturally this begs the question of what would happen if one added
> modprobe's for md raid support (right after the modprobe of dm_mod in
> unconfigured.sh), removed the "next if..." line in the proxinstall
> script above, reconstituted the ISO, and booted it up to "see what
> happens."
>
> It seems that someone else had probably already done this.  If no one
> else has done it then it's likely someone would be willing to offer
> advice on why enabling support for md devices would be "a bad thing(tm)"
> or at least offer some insight as to why md devices are specifically
> avoided in the present installer.
>
> --
> Paul Gray                                         -o)
> 314 East Gym, Dept. of Computer Science           /\\
> University of Northern Iowa                      _\_V
>  Message void if penguin violated ...  Don't mess with the penguin
>  No one says, "Hey, I can't read that ASCII attachment ya sent me."
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