Re: [xcat-user] : KVM storage question

Xiao Peng Wang Wed, 27 Jul 2016 17:18:06 -0700

xCAT team will take a look of this issue and give you feedback soon.

Thanks
Best Regards
----------------------------------------------------------------------
Wang Xiaopeng (王晓朋)
IBM China System Technology Laboratory
Tel: 86-10-82453455
Email: w...@cn.ibm.com
Address: 28,ZhongGuanCun Software Park,No.8 Dong Bei Wang West Road, Haidian District Beijing P.R.China 100193

----- Original message -----
From: "Douglas Myers" <dgmy...@us.ibm.com>
To: "xCAT Users Mailing list" <xcat-user@lists.sourceforge.net>
Cc:
Subject: Re: [xcat-user] : KVM storage question
Date: Thu, Jul 28, 2016 4:38 AM

Bringing this up again, now that I have upgraded to 2.12.1 on the MN.

We've hit this off and on ever since, but with 2.12 it seems to occur whenever there's a removal from kvm_nodedata cache of a node def and try to rpower on:

# rpower w30234 on
w30234: Error: internal error Only 1 ide controller is supported

We would get this error if we had more than one hard disk, virtio or scsi, defined on a client node profile. There was a hint in RH bug https://bugzilla.redhat.com/show_bug.cgi?id=1136182
Using that idediscussion as a basis, I removed the creation of virtual cdrom from /opt/xcat/lib/perl/xCAT_plugin/kvm.pm :
#} else { #give the VM an empty optical drive, to allow chvm live attach/remove
# my $cdhash;
# $cdhash->{device} = 'cdrom';
# $cdhash->{type} = 'file';
# $cdhash->{readonly};
# $cdhash->{target}->{dev} = $cdprefix . $suffixes[$suffidx];
# push @returns, $cdhash;

And restarted xCAT. We no longer get the ide error, but is defintiely a hack we can't maintain easily. We don't normally need the cdrom so not having it is not harmful to us, but kvm.pm will be clobbered on next upgrade.

MN x86_64 SLES11 xCAT 2.12.1
Hypervisor x86_64 SLES11

_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"

Douglas Myers---08/19/2015 08:32:25 AM---Anything further on this? _________________________________

From: Douglas Myers/Schaumburg/IBM
To: "xCAT Users Mailing list" <xcat-user@lists.sourceforge.net>
Date: 08/19/2015 08:32 AM
Subject: Fw: [xcat-user] KVM storage question

Anything further on this?

_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"

----- Forwarded by Douglas Myers/Schaumburg/IBM on 08/19/2015 08:31 AM -----

From:
Douglas Myers/Schaumburg/IBM

To:
xCAT Users Mailing list <xcat-user@lists.sourceforge.net>

Date:
08/12/2015 03:23 PM

Subject:
Re: [xcat-user] KVM storage question

Ah, that's was my confusion then, because kvm_nodedata has nothing for z10071 node, unless I only specify one disk, e.g. I get the rootvg image in vmstorage, system will power on with rpower, but when I add in second disk, I clear the cahced profile in kvm_nodedata ( chtab -d node=z10071 kvm_nodedata before power on) or it won't assign the second image as second disk, but if I clear the cache I get the IDE error and nothing gets added to the table. So I have nothing to compare a manual creation on the hypervisor to...

_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"

Xiao Peng Wang ---08/11/2015 11:10:27 PM---I did get your point. But I have not your exactly images to create the problem and fix it. Since you already verified the confi

From:
Xiao Peng Wang <w...@cn.ibm.com>

To:
xCAT Users Mailing list <xcat-user@lists.sourceforge.net>

Date:
08/11/2015 11:10 PM

Subject:
Re: [xcat-user] KVM storage question

I did get your point. But I have not your exactly images to create the problem and fix it. Since you already verified the configure in libvirt manually, if you can share me what the xml looks like and the different between it with the one created by xCAT, it will be helpful for me to fix it.

Thanks
Best Regards
----------------------------------------------------------------------
Wang Xiaopeng (王晓朋)
IBM China System Technology Laboratory
Tel: 86-10-82453455
Email: w...@cn.ibm.com
Address: 28,ZhongGuanCun Software Park,No.8 Dong Bei Wang West Road, Haidian District Beijing P.R.China 100193

Douglas Myers ---2015/08/12 01:20:09---I'm wondering if we have a communications problem on this thread... I know how to make the image fil

From: Douglas Myers <dgmy...@us.ibm.com>
To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Date: 2015/08/12 01:20
Subject: Re: [xcat-user] KVM storage question

I'm wondering if we have a communications problem on this thread...

I know how to make the image files work within libvirtd and I can create/modify using cli tools and/or gui within libvirtd. The actual actual of havign a second disk is not the problem. What is my issue is having xCAT create teh profile when we rpower on the VM from MN and have it do it ephemerally instead of xCAT managing an existing profile on a hypervisor. In other words, w/o xCAT and it's dynamic VM profiles, this works fine, it's only when I use xCAT that it ahs a problem, and I'm pretty sure it comes down to the entry for vmstorage field, what I'm looking for is if there is an accepted syntax for that field.

To restate, this is not a libvirtd issue, it's not KVM, it's getting xCAT's dynamic xml creation to function with two image files that are not viritio. If not possible, ok, then I'll go form there, but if it is possible, I jsut need assistance with getting the syntax right on the xCAT definition of VM.

_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"

Xiao Peng Wang ---08/10/2015 06:31:20 AM---If the manually change through virsh can make it change, you can dump out the xml file of the dom and diff it with the xml whic

From:

Xiao Peng Wang <w...@cn.ibm.com>

To:

xCAT Users Mailing list <xcat-user@lists.sourceforge.net>

Date:

08/10/2015 06:31 AM

Subject:

Re: [xcat-user] KVM storage question

If the manually change through virsh can make it change, you can dump out the xml file of the dom and diff it with the xml which generated by xcat (use tabdump kvm_nodedata command)

Thanks
Best Regards
----------------------------------------------------------------------
Wang Xiaopeng (王晓朋)
IBM China System Technology Laboratory
Tel: 86-10-82453455
Email: w...@cn.ibm.com
Address: 28,ZhongGuanCun Software Park,No.8 Dong Bei Wang West Road, Haidian District Beijing P.R.China 100193

Douglas Myers ---2015/08/09 01:37:12---libvirtd is happy enough to run the second and/or third disk if I manually insert via virt-manager o

From: Douglas Myers <dgmy...@us.ibm.com>
To: xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Date: 2015/08/09 01:37
Subject: Re: [xcat-user] KVM storage question

libvirtd is happy enough to run the second and/or third disk if I manually insert via virt-manager or cli and VM sees the disk fine, so this issue is how to get xcat to start an ephmeral VM that doesn't have a a porfile saved on a hypervisor?

I can do this with lvm using vmstorage=phy:/path/tol/v1|phy:/path/to/lv2 on a node yealds to compalints from xcat, all I'm looking for is the equivalent for a file based disk image

_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"

Xiao Peng Wang ---08/06/2015 03:41:19 AM---I think you first need to figure out what libvirt can do for you since xcat totally following it's functionalities.

From:

Xiao Peng Wang <w...@cn.ibm.com>

To:

xCAT Users Mailing list <xcat-user@lists.sourceforge.net>

Date:

08/06/2015 03:41 AM

Subject:

Re: [xcat-user] KVM storage question

I think you first need to figure out what libvirt can do for you since xcat totally following it's functionalities.

Thanks
Best Regards
----------------------------------------------------------------------
Wang Xiaopeng (王晓朋)
IBM China System Technology Laboratory
Tel: 86-10-82453455
Email: w...@cn.ibm.com
Address: 28,ZhongGuanCun Software Park,No.8 Dong Bei Wang West Road, Haidian District Beijing P.R.China 100193

Douglas Myers ---2015/08/06 12:45:05---SLES 11 MN and VM xCAT-2.9.1 x86_64 KVM I am in the process of converting from a LVM backed storag

From: Douglas Myers <dgmy...@us.ibm.com>
To: "xCAT Users Mailing list" <xcat-user@lists.sourceforge.net>
Date: 2015/08/06 12:45
Subject: [xcat-user] KVM storage question

SLES 11 MN and VM xCAT-2.9.1 x86_64 KVM

I am in the process of converting from a LVM backed storage solution for VMs to a raw file for disk housed in a GPFS cell. The design has the hypervisors seeing gpfs as local storage, and when I add a single raw image file and start the VM with it, everythign works fine. The problem is, several of these VMs have two or three logical volumes presented as disks, sd[abc]. When I attempt to convert the second lv to a file, the conversion works fine, but I'm missing the proper syntax to add it to the vmstorage object:

vmstorage=/gpfs/root/z10071_rootvg.img|r/gpfs/app/z10071_appvg.img

When attempting to power up, I receive this message:

z10000:~ # rpower z10071 on
z10071: Error: internal error Only 1 ide controller is supported

If I try to set the vmstoragemodel to scsi, xCAT will boot the VM but the VM cannot find it's root disk. If I revert to a single disk and remove vmstoragemodel I can successfully power on and boot into OS. So how to I add more than one image file as a disk?

(Yes, I know, should be using virtio disks, these are legacy machines, newer VMs will hopefully be using it)

_________________________________
Douglas Myers,
IBM Special Events - Smart Cloud BMS Lead
_________________________________
"It's not an opportunity if it doesn't scare you a little bit"
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From:	Douglas Myers/Schaumburg/IBM
To:	xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Date:	08/12/2015 03:23 PM
Subject:	Re: [xcat-user] KVM storage question

From:	Xiao Peng Wang <w...@cn.ibm.com>
To:	xCAT Users Mailing list <xcat-user@lists.sourceforge.net>
Date:	08/11/2015 11:10 PM
Subject:	Re: [xcat-user] KVM storage question

Re: [xcat-user] : KVM storage question

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