Samba 4

[Oliver Brakmann]

Hi list,

I'd like to know what Ubuntu's plans are for its samba package.

Currently, Ubuntu has a stable samba package at 3.6.18 and a samba4
package that's basically unusable.

In Debian, Samba has seen a lot of work during the last year or so,
including the move from 3.6 to 4 and the removal of the separate samba4
package.  It probably hasn't seen wide-spread testing yet, though.

Will this be merged in time for the LTS or will that happen during the
next cycle due to stability reasons?

Thanks!

Oliver


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Re: how to copy vtoc to a new disk?

[Oliver Brakmann]

On 2011-02-02 03:54, Asif Iqbal wrote:
> How to apply the vtoc of /dev/sda to /dev/sdb ?
> 
> On solaris I do it like this
>prtvtoc /dev/rdsk/c0t0d0s2 | fmthard -s - /dev/rdsk/c0t1d0s2
> 
> I am looking at the man page of sfdisk and but not quite sure the
> exact one liner

sfdisk -d /dev/sda | sfdisk /dev/sdb

HTH,
Oliver


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Re: facter and KVM

[Oliver Brakmann]

On 2011-01-27 15:51, Clint Byrum wrote:
> Give yourself some credit, you were able to identify that its a problem
> and file a cogent bug report.

No, I meant I'm an idiot because I didn't see that it was fixed already.

But in my defense, I checked the changelog on LP
(https://launchpad.net/ubuntu/+source/facter/+changelog), and the entry
for the Debian version which included the fix (1.5.7-2) does not appear
there.  Is that intended this way?

> I just looked, and you did the right thing and marked it as Fix
> Released, though it would be good to also mention in the comments the
> changelog line that leads you to believe that.

Ok, will add that later when I do all the other paper work.

> I went ahead and nominated the bug for Lucid. You'll want to add the SRU
> justification to the bug description next. Also does this affect
> Maverick as well? Sounds like yes.

Thanks. Yes, maverick has 1.5.7-1, so it is affected as well.


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Re: facter and KVM

[Oliver Brakmann]

On 2011-01-26 18:33, Dustin Kirkland wrote:
> I'd agree too.  Please make sure you file a bug and follow the rest of
> those procedures described in that SRU wiki document, and this should
> go painlessly.

D'uh, I'm an idiot.

I filed the bug now (it's #708080), and subsequently began setting up
all the bzr stuff the SRU wiki page talks about.  When I checked out the
latest facter package, I saw that the bug has already been fixed in
Debian, and merged into the latest package which is now in Natty.

I'll try the SRU stuff, but I've never done that before, and I'm
clueless, so bear with me ;-p


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facter and KVM

[Oliver Brakmann]

Hi guys,

on current Ubuntu releases (the latest LTS most notably), puppet's
facter library does not recognize KVM virtual machines as virtual:

$ facter  | grep virtual
is_virtual => false
virtual => physical

$ grep -i qemu /proc/cpuinfo
model name  : QEMU Virtual CPU version 0.12.3

This has already been fixed upstream in version 1.5.8. However, this
version has not been packaged for any Ubuntu release yet (not even Natty).

(The commit is here, if anyone is interested:
https://github.com/puppetlabs/facter/commit/62b6773a63bb96273fbcb6f79bec524fb67df075)


I'd like to ask for your opinion whether it would be worthwhile to file
a bug on this.  On the one hand, this is fixed upstream already, on the
other hand, both puppet and kvm are in main, and Lucid might benefit
from an SRU.  Is this SRU worthy?


Thanks,
Oliver


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Re: Default use of caching on raw volumes

[Oliver Brakmann]

On 2010-09-01 21:19, Nikolai K. Bochev wrote:

> And if testing shows things are ok, would there be any merit in changing 
> either libvirt or virt-manager to do this by default just for ubuntu ( not 
> really sure what upstream will do about it ) ? 

FWIW, I would welcome such a change myself. Adding the cache='none'
directive to a VM's .xml file is the very first thing I do after its
installation, for performance reasons.

I have been running several VMs (all Lucid) for about four months now
that way, without ever encountering any issues¹.

The host is also Lucid, with unattended-upgrades set to automatically
reboot the machine when necessary, so the VMs sometimes just get killed.


Regards,
Oliver


1) well, besides that disk I/O from the guests is still too slow for my
taste.  I get near native speed (about 80 MB/s) using direct i/o during
tests with dd, but regular i/o during normal operation is only about 35
MB/s.  If anyone knows how to force direct i/o on all processes (or
something with similar results), please let me know.


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Directory Server on Ubuntu?

[Oliver Brakmann]

Hello Devs,

I'd like to ask about the current state of the directory server project
for Ubuntu.  The 389 directory server PPA hasn't seen any activity for
the last year, but there has been some activity on blueprints for Lucid
relating to the FreeIPA project.

So, what is the current state?
What is the current recommendation if one were to build a directory
server on Ubuntu?

Thanks,
Oliver


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Re: Ubuntu server GUI

[Oliver Brakmann]

On Fri, 2008-06-27 15:08, JAWUD wrote...
> There are several options for a GUI.
> [...]
> The last option is to make a remote GUI system.

I like that.

> All the interfaces are just different front ends. So I think ubuntu needs a
> configuration abstraction layer. Something like Augeas. Augeas can become the
> back end and then it's easier to build different GUIs. Augeas intend to cover
> all commonly used configuration files and it is still possible to edit the
> config files manual.

I'm a bit concerned that there is only talk about editing configuration
files in all these discussions.  There's more to system administration
than that.

I'm also surprised that noone has mentioned 'func' yet, even though it
was prominently featured on LWN's front page an issue or two ago:
. I believe it could be a good
supplement to augeas.

Oliver


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Re: XFS In Dapper [previously posted to ubuntu-users]

[Oliver Brakmann]

On Wed, 2008-03-05 16:23, Michael Hipp wrote...
> >> Importantly, you can have data-loss on XFS if you lose power suddenly, 
> >> perhaps more so than ext3. When files get corrupted on XFS, I have 
> >> noticed they go to zero size
> > 
> > I believe I read somewhere that that has been fixed some time ago.
> 
> Oliver, could you perchance find a reference for that? Dapper really 
> isn't that old.

Yes, I found it again.  It's in the XFS FAQ, actually:
http://oss.sgi.com/projects/xfs/faq.html#nulls

Sadly, the fix only went in for 2.6.22, so Dapper (probably) doesn't
have it.  Also, it doesn't say how it was fixed, or how the new
behaviour is.  I haven't looked for the changeset in question itself,
maybe it sheds some light on the issue.

HTH,
Oliver


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Re: XFS In Dapper [previously posted to ubuntu-users]

[Oliver Brakmann]

On Wed, 2008-03-05 17:04, David Kempe wrote...
> XFS is good, we use it on dapper all the time. My largest XFS filesystem 
> is 5.5TB formatted.

While I don't have such huge filesystems, I've been using XFS for ~6
years now, without any problems at all.

> btw, one thing I found was that xfs_repair can chew massive amounts of 
> ram to run a repair on a filesystem. I had a 2TB fs take nearly 8gb of 
> ram (and swap) to repair it. It did a good job of repairing, and took 
> ages.

They're actually working on fixing that.  See this interesting talk:
http://linux.conf.au/programme/detail?TalkID=135

Slides:
http://mirror.linux.org.au/pub/linux.conf.au/2008/slides/135-fixing_xfs_faster.pdf

Video:
http://mirror.linux.org.au/pub/linux.conf.au/2008/Wed/mel8-135.ogg

> Importantly, you can have data-loss on XFS if you lose power suddenly, 
> perhaps more so than ext3. When files get corrupted on XFS, I have 
> noticed they go to zero size

I believe I read somewhere that that has been fixed some time ago.


Oliver
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Re: cloning edgy

[Oliver Brakmann]

Hi,

On Thu, 2006-12-28 20:48, Ala Salman wrote...
> When the cloned system boots, the network cards are detected at start up, but 
> the output of ifconfig -a shows that they are eth2 and eth3.   I can only 
> bring up eth2.  

Adjust or remove /etc/iftab.

> On the master node the output of df shows /var/run and /var/lock, but on the 
> cloned client there isn't any mention of these two.

Do the directories exist?  On Ubuntu, a tmpfs is mounted over both those
directories.  If they are gone, the mount obviously fails.

HTH.

Bye,
Oliver
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