C. L. Martinez | 2 Mar 2012 08:55
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Questionas about fence_vmware_soap

Hi all,

 I have some doubts about using fence_vmware_soap under vSphere
Infrastructure (4.1).

a) Can I use this fence device under an ESXi 4.1 standalone server
without using vCenter server??

b) To use fence_vmware_soap with vCenter server, what privileges needs
vCenter user to fence cluster nodes?? start, stop and restart are
right or do I neeed to configure more??

Thanks.

Masopust, Christian | 2 Mar 2012 10:09
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Re: Questionas about fence_vmware_soap


Hi,

I don't know fence_vmware_soap but for ESXi 4.1 I've written
a "fence_esxi" (based on fence_apc) which connects by ssh and
simply powers on/off the VM by means of "vim-cmd".

Please send me a private mail if you like to have it :)

br,
christian 

> -----Ursprüngliche Nachricht-----
> Von: linux-cluster-bounces <at> redhat.com 
> [mailto:linux-cluster-bounces <at> redhat.com] Im Auftrag von C. 
> L. Martinez
> Gesendet: Freitag, 02. März 2012 08:55
> An: linux-cluster <at> redhat.com
> Betreff: [Linux-cluster] Questionas about fence_vmware_soap
> 
> Hi all,
> 
>  I have some doubts about using fence_vmware_soap under vSphere
> Infrastructure (4.1).
> 
> a) Can I use this fence device under an ESXi 4.1 standalone server
> without using vCenter server??
> 
> b) To use fence_vmware_soap with vCenter server, what privileges needs
> vCenter user to fence cluster nodes?? start, stop and restart are
(Continue reading)

Scooter Morris | 2 Mar 2012 15:05
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GFS2 bug in appending to a file?

Hi all,
    We're seeing a problem with file append using cat: "cat >> file" on a 4 node cluster with gfs2 where the file's mtime doesn't get updated.  This looks exactly the same as in Bug 496716, except that bug was supposed to have been fixed in RHEL 5.5 and we're running RHEL 6.2.  Did the same problem creep back in or is this a new manifestation of the problem?  We are mounting noatime, noquota, nodiratime, noacl if that helps.

Thanks in advance!

-- scooter

<div>
    Hi all,<br>
    &nbsp;&nbsp;&nbsp; We're seeing a problem with file append using cat: "cat &gt;&gt;
    file" on a 4 node cluster with gfs2 where the file's mtime doesn't
    get updated.&nbsp; This looks exactly the same as in <a href="https://bugzilla.redhat.com/show_bug.cgi?id=496716">Bug
      496716</a>, except that bug was supposed to have been fixed in
    RHEL 5.5 and we're running RHEL 6.2.&nbsp; Did the same problem creep
    back in or is this a new manifestation of the problem?&nbsp; We are
    mounting noatime, noquota, nodiratime, noacl if that helps.<br><br>
    Thanks in advance!<br><br>
    -- scooter<br><br>
</div>
Steven Whitehouse | 2 Mar 2012 15:16
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Favicon

Re: GFS2 bug in appending to a file?

Hi,

On Fri, 2012-03-02 at 06:05 -0800, Scooter Morris wrote:
> Hi all,
>     We're seeing a problem with file append using cat: "cat >> file"
> on a 4 node cluster with gfs2 where the file's mtime doesn't get
> updated.  This looks exactly the same as in Bug 496716, except that
> bug was supposed to have been fixed in RHEL 5.5 and we're running RHEL
> 6.2.  Did the same problem creep back in or is this a new
> manifestation of the problem?  We are mounting noatime, noquota,
> nodiratime, noacl if that helps.
> 
> Thanks in advance!
> 
> -- scooter
> 
Well the patch in question is definitely in RHEL6, so this is probably
something different. Can you open a bug for it?

Steve.

Greg Mortensen | 2 Mar 2012 17:27
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Favicon

Re: Throughput drops with VMware GFS2 cluster when using fence_scsi

<Responding to myself for benefit of the list>

This looks like it was caused by the device mapping defaulting to a
round-robin path selection policy.  While I couldn't find any mention
of it in the RedHat cluster documentation, I did see some MSCS
postings[1] that said:

Round Robin can interfere with applications that use SCSI reservations
for sharing LUNs among VMs and thus is not supported with the use of
LUNs with MSCS.

so I changed the policy to "Most Recently Used" and was able to get
sustained writes of 40MB/s and sustained reads of 100MB/s down one
NIC.

  Regards,
    Greg

[1] http://en.community.dell.com/techcenter/storage/w/wiki/2671.aspx

Orquidea Salt mas | 2 Mar 2012 20:22
Picon

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-------------------------------------------------------------------------------
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carlopmart | 2 Mar 2012 23:21
Picon

Re: Questionas about fence_vmware_soap

On 03/02/2012 10:09 AM, Masopust, Christian wrote:
>
> Hi,
>
> I don't know fence_vmware_soap but for ESXi 4.1 I've written
> a "fence_esxi" (based on fence_apc) which connects by ssh and
> simply powers on/off the VM by means of "vim-cmd".
>
> Please send me a private mail if you like to have it :)
>
> br,
> christian
>

Ok, I have tried to configure it (fence_vmware_soap):

<cluster config_version="1" name="VMwareCluster">
	<cman expected_votes="1" two_node="1"/>
	<logging to_logfile="yes" to_syslog="yes"/>
	<clusternodes>
		<clusternode name="firstnode.domain.com" nodeid="1">
			<fence>
				<method name="1">
					<device name="esxi-resort" port="rhelnode01" 
uuid="564dee4b-7107-f6c5-608e-dd781fac9847"/>
				</method>
			</fence>
		</clusternode>
		<clusternode name="secondnode.domain.com" nodeid="2">
			<fence>
			</fence>
		</clusternode>
	</clusternodes>
	<fencedevices>
		<fencedevice agent="fence_vmware_soap" ipaddr="172.25.50.8" 
login="root" passwd="mypass" ssl="1" name="esxi-resort"/>
		<fencedevice agent="fence_ack_manual" name="last-resort"/>
	</fencedevices>
......

  ... and it seems it works, but ....

[root <at> firstnode cluster]# clustat
Cluster Status for VMwareCluster  <at>  Fri Mar  2 22:16:04 2012
Member Status: Quorate

  Member Name                                                     ID 
Status
  ------ ----                                                     ---- 
------
  firstnode.domain.com                                         1 Online, 
Local
  secondnode.domain.com                                         2 Offline

... and when I try to start clvmd:

[root <at> firstnode log]# service clvmd start
Starting clvmd: clvmd startup timed out

and group_tool output:

[root <at> firstnode cluster]# group_tool
fence domain
member count  1
victim count  1
victim now    2
master nodeid 1
wait state    fencing
members

dlm lockspaces
name          clvmd
id            0x4104eefa
flags         0x00000015 need_plock,kern_stop,join
change        member 0 joined 0 remove 0 failed 0 seq 0,0
members
new change    member 1 joined 1 remove 0 failed 0 seq 1,1
new status    wait_messages 0 wait_condition 1 fencing
new members   1

  .. and I can't configure shared storage with lvm tools because they 
doesn't works ... Where is the problem?' Do I need to setup a quorum 
device??

Still I have not configured second node ...

--

-- 
CL Martinez
carlopmart {at} gmail {d0t} com

Marc Grimme | 8 Mar 2012 16:04
Picon

GFS2 not able to remove a file

Hello,
I'm having a strange behavior of a GFS2 file system.

I have a file I can write to and read from. But I cannot delete the file or move it.
I've already done an fsck but with no effect.

see below
---------------X8-------------
[root <at> server run.old]# cat messagebus.pid
4000
[root <at> server run.old]# echo 4001 > messagebus.pid
[root <at> server run.old]# cat messagebus.pid
4001
[root <at> server run.old]# rm messagebus.pid
rm: remove regular file `messagebus.pid'? y
rm: cannot remove `messagebus.pid': No such file or directory
---------------X8-------------

Information about system:
---------------X8------------------------
# cat /etc/redhat-release
CentOS release 6.2 (Final)
# modinfo gfs2
filename:       /lib/modules/2.6.32-220.4.2.el6.x86_64/kernel/fs/gfs2/gfs2.ko
license:        GPL
author:         Red Hat, Inc.
description:    Global File System
srcversion:     C664A0EEE2337E08DEF7648
depends:        dlm
vermagic:       2.6.32-220.4.2.el6.x86_64 SMP mod_unload modversions
---------------X8------------------------

If you need any more information let me know.

Has anybody an idea where this is from or how I can solve it?

Thanks Marc.

______________________________________________________________________________

Marc Grimme

ATIX Informationstechnologie und Consulting AG | Einsteinstrasse 10 |
85716 Unterschleissheim | www.atix.de

Enterprise Linux einfach online kaufen: www.linux-subscriptions.com

Registergericht: Amtsgericht München, Registernummer: HRB 168930, USt.-Id.:
DE209485962 | Vorstand: Thomas Merz (Vors.), Marc Grimme, Mark Hlawatschek, Jan R. Bergrath |
Vorsitzender des Aufsichtsrats: Dr. Martin Buss

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Rajagopal Swaminathan | 8 Mar 2012 18:40
Picon

Re: GFS2 not able to remove a file

Greetings,

On Thu, Mar 8, 2012 at 8:34 PM, Marc Grimme <grimme <at> atix.de> wrote:
> Hello,
> I'm having a strange behavior of a GFS2 file system.
>
> I have a file I can write to and read from. But I cannot delete the file or move it.
> I've already done an fsck but with no effect.
>
> see below
> ---------------X8-------------
> [root <at> server run.old]# cat messagebus.pid
> 4000
> [root <at> server run.old]# echo 4001 > messagebus.pid
> [root <at> server run.old]# cat messagebus.pid
> 4001
> [root <at> server run.old]# rm messagebus.pid
> rm: remove regular file `messagebus.pid'? y
> rm: cannot remove `messagebus.pid': No such file or directory
> ---------------X8-------------
>

What does lsof <filename> says?

--

-- 
Regards,

Rajagopal

Charles Riley | 8 Mar 2012 19:59
Favicon

Clustered LVM for storage

Greetings,


I have an aoe device with a lot of storage in it that I would like to share among four rhel 4 servers.  Each of the servers will mount it's own storage, no data is shared between them.  e.g the servers won't be mounting the same volumes.

I could create four different raid groups on the aoe device and present a different one to each server, but that would waste space.
What I'd rather do is create one big raid group and use clustered lvm to divvy the space between servers.

Is it possible?  Would it be enough to run just the clustered lvm daemon, or would I need to install all of the cluster suite?
Are there other/better options?

Thanks!

Charles




<div>
<p>Greetings,</p>
<div><br></div>
<div>I have an aoe device with a lot of storage in it that I would like to share among four rhel 4 servers. &nbsp;Each of the servers will mount it's own storage, no data is shared between them. &nbsp;e.g the servers won't be mounting the same volumes.</div>
<div><br></div>
<div>I could create four different raid groups on the aoe device and present a different one to each server, but that would waste space.</div>
<div>What I'd rather do is create one big raid group and use clustered lvm to divvy the space between servers.</div>
<div><br></div>
<div>Is it possible? &nbsp;Would it be enough to run just the clustered lvm daemon, or would I need to install all of the cluster suite?</div>
<div>Are there other/better options?</div>
<div><br></div>
<div>Thanks!</div>
<div><br></div>
<div>Charles</div>
<div><br></div>
<div>
<br clear="all"><div><br></div>
<br>
</div>
</div>

Gmane