Re: patch request

[Lucas Albers]

Christian Hammers said:
 Hello

 On 2004-09-17 Wieslaw wrote:
 I seek patch which makes possible making the virtual ervers.

Debian supports this nativelly.
Search the debian archives.
apt-cache search vserver.
then subscribe to the vserver mailing list.
I've been using the debian vserver product for increase reliability,
easier administration,etc,etc, on my production servers for 8 months or
so.
make system cloning much easier, and system setup easier, tested upgrades,
etc.
If for example your running a software raid system, and a disk dies, just
rsync your vserver over, and stop the existing vserver instance, and start
up the new vserver instance.
Total downtime, with full remote recovery, perhaps 30 seconds.
This has saved my bacon twice in the last few months.

I've been using the vserver+grsecurity 2.4.25 patch to include grsecurity
with the vserver product for increase security.
Never had a system crash on the 5 servers I've been running for a couple
of months, ever synce 2.4.25 came out.
I say this is production quality stable, even under high loads,etc.
One of my vserver moves gigs of mail/ftp/proxy/apt traffic every day with
tons of users and it has trivial performance slowdown.
If you combine this with ha+drbd you can get active,active ha-cluster with
full failover, for automatic high availability clustering.
This is going to be my next alioth documentation project, assuming I work
on it for my job, which is the tentative plan.
(6 cluster HP drbd+ha+vserver+grsecurity active active debian cluster)
Exciting!
Ask on the mailing list and read the web page for more help.
Their is a lot of documentation on how to do this.


-- 
--Luke CS Sysadmin, Montana State University-Bozeman


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Re: patch request

[Lucas Albers]

Donovan Baarda said:
 See the  util-vserver, kernel-patch-ctx, and vserver-debiantools packages
 for details. I'm not sure how up-to-date the debs are though...

About a 2% performance slowdown versus a non vserver.
Worth the performance slowdown, imo.
The debs are maintained pretty well, the bugs I file get fixed, and the
debian dev's are fast to put new versions up.(but not too fast...these are
for production systems.)



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--Luke CS Sysadmin, Montana State University-Bozeman


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Re: patch request

[Donovan Baarda]

G'day,

From: Christian Hammers [EMAIL PROTECTED]
 Hello

 On 2004-09-17 Wieslaw wrote:
  I seek patch which makes possible making the virtual ervers.
 ...
  I know how to make with ssh, ftp, apache, but not kernel :(

 What you are probably looking for is user-mode-linux:
 You start a modified linux kernel for each virtual host you want to have
 and provide each with its own little filesystem which can even be
 stored in a single file using the loopback device driver.

 See user-mode-linux.sourceforce.net.

Actually, what he is probably refering to is the kernel vserver patch that
allows you to run multiple viritual servers on one machine. It's a little
less emulate the whole world than UML, making it heaps faster.

See the  util-vserver, kernel-patch-ctx, and vserver-debiantools packages
for details. I'm not sure how up-to-date the debs are though...


Donovan Baardahttp://minkirri.apana.org.au/~abo/



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