From: Herbert Poetzl (herbert_at_13thfloor.at)
Date: Thu 30 Jan 2003 - 18:06:00 GMT
On Thu, Jan 30, 2003 at 01:26:24PM -0000, Mark Sutton wrote:
> Thanks guys. I've got it all figured out now :) I am interested in the
> quota side as well but it is not vital to the setup at present. I am
http://www.13thfloor.at/VServer/
> creating logical volumes on a hardware RAID so I can easily control the disk
> space allocated to each VServer. Quota within the VServer environment will
> probably become a requirement in the future, so watch out Herbert ;) I might
> need more help yet...
I scheduled some extra training hours, just to be
prepared *G*
> This setup - Athlon 1800 XP, 512MB DDR 2100, Promise Fasttrak with 2 x 60 GB
> 7200rpm Seagate HDDs, striped, running on native Linux ATARAID driver, OS
> installed on dedicated HDD - is screaming fast running 20 VServers and has
> been stable through all the testing I have thrown at it. The server is not
> in production, but I'm talking to some UK ISPs who are interested in running
> some VServers in the near future.
>
> There are still some things I need to sort out, and it would be interesting
> to hear if anyone else is trying the same things.
>
> One major thing for me is to get LVM snapshots working properly with my EXT3
> L.V.'s so that backups can be run without downtime. The LVM module in the
good concept, I almost did it the same way, but LVM
gave me some troubles and I decided to take another
approach (about one year ago, read below ...)
> kernel is not that recent (v1.0.3), and it is possible to create, but not
> mount EXT3 snapshots because (as far as I can tell) this old version cannot
> handle the journal properly. This has been fixed in v1.0.5 but I also
> notice that there is a v2 available. Has anyone else already got EXT3
> snapshots working? Is it worth going to LVM2 or should I just stick with
> v1.0.5? Rather [OT] I know, but it would be interesting to hear if anyone
> else is doing backups this way.
I am doing simple dump/restore backups with a recent
linux dump (dump-0.4b25) which does zip/bzip block
compression on the fly, this works at an average
throughput of 2.5MB/s and is almost unnoticeable on
a dual CPU system ... (needless to say that it work
while the virtual server is active ;)
> I have also been stripping down Webmin to suit the VServer environment. It
> is difficult to get it perfect without reworking some of the modules (which
> I may attempt in time) but it does give a pretty good set of technical
> features... I have also had PleskSA running happily on a VServer, but
> didn't really like the interface that much. Is anyone else using/providing
> a control panel with their VServers? If so what are/were your experiences?
> Linuxconf?
>
> I have hacked the newvserver script to allow a VServer to be built to any
> specification. Basically, the script reads in a list of basesystem
> configurations from a local repository, and presents these in a menu. Next,
> the script reads in a list of plans from the local repository and presents
> these in a menu. A plan is just a file containing a list of templates, and
> a template is just a list of files (RPMs/TGZs) to be installed for a
> particular application (eg Apache) plus a post-install script.
>
> The system is nice because I can define plans containing any application
> stored in the repository, and then automate the whole build from newvserver.
>
> My most complex plan builds a
> Qmail/LDAP/Spamassassin/Antivirus/Courier/Squirrelmail VServer with a nifty
> LDAP directory front-end called GOsa (http://www.gonicus.de/eng/index.html).
> I'll try to get it in a 'releaseable' state if anyone else is interested in
> it.
sure we are ....
best,
Herbert
> Ciaw for now...
>
> Mark.
>
>
>
> ----- Original Message -----
> From: "Herbert Poetzl" <herbert_at_13thfloor.at>
> To: <vserver_at_solucorp.qc.ca>
> Sent: Wednesday, January 29, 2003 4:01 PM
> Subject: Re: [vserver] What is the point of /dev/hdv1?
>
>
> > On Wed, Jan 29, 2003 at 03:19:00PM -0000, Mark Sutton wrote:
> > > I've just spent some time hacking the newvserver script to install
> > > VServers from local build-lists and RPM repository. It's helped me
> to
> > > better understand how everything hangs together, but there's one
> thing
> > > I don't get... What is the purpose of setting up the following mount
> > > point in /usr/lib/vserver/install-post.sh?
> > >
> > > if [ ! -f $VROOT/etc/fstab ] ; then
> > > echo /dev/hdv1 / ext2 defaults
> > > 1 1 >$VROOT/etc/fstab
> > > echo /dev/hdv1 / ext2 rw 1 1
> > > >$VROOT/etc/mtab
> > >
> > > It was my understanding that root in a VServer couldn't mount/umount
> > > devices from within the VPS anyway, so what purpose does this serve?
> > >
> >
> > several utilities (like df) use the mount entries (/etc/mtab)
> > for locating their devices/gathering information ...
> >
> > for these utilities the fake entry is provided ...
> >
> > if you use per vserver quota, you will also need a
> > special device to proxy the quota syscalls ...
> >
> > > Also, what is the best way to entirely remove a VServer? When I do
> > > vserver XXX stop not everything is unmounted, so deleting all the
> > > contents is obviously not possible. Do I have to unmount everything
> > > manually and then delete or am I missing something here.
> >
> > depending on the release version of the vserver scripts,
> > some or all automatic mounts are removed if possible
> > (i.e. no other programms or mounts active)
> >
> > > Sorry for the newbie-ish questions but I'm nearly there with it all
> > > now ;)
> >
> > no big deal ..
> >
> > > I'll be happy to share my work with VServer once it's all figured
> out.
> >
> > wonderful ;)
> >
> > best,
> > Herbert
> >
> > > Kind Regards,
> > >
> > >
> > >
> > > Mark.
> >