10:36 a.m.
Hi there,
I was doing some testing around ovirt and iscsi and found an issue where as
when you use "dd" to create "backing-stores" for iscsi and you point
ovirt
to it to discover & login, it thinks the LUN ID is the same although the
target is different and adds additional paths to the config
(automagically?) bringing down the iSCSI storage domain.
See attached screenshot of what I got when trying to a "new iscsi san
storage domain" to ovirt. The Storage Domain is now down and I cannot get
rid of the config (???) how do I force it to logout of the targets ??
Also, anyone know how to deal with the duplicate LUN ID issue ?
Thanks
Alex
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
11:25 a.m.
another screenshot of how confused it can get
alex
On 28 February 2013 15:36, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
Hi there,
I was doing some testing around ovirt and iscsi and found an issue where
as when you use "dd" to create "backing-stores" for iscsi and you
point
ovirt to it to discover & login, it thinks the LUN ID is the same although
the target is different and adds additional paths to the config
(automagically?) bringing down the iSCSI storage domain.
See attached screenshot of what I got when trying to a "new iscsi san
storage domain" to ovirt. The Storage Domain is now down and I cannot get
rid of the config (???) how do I force it to logout of the targets ??
Also, anyone know how to deal with the duplicate LUN ID issue ?
Thanks
Alex
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
11:30 a.m.
FWIW, restarting the HV "resolves" the issue and brings the storage domain
back up; but I dont know whether that is because that's where the target
(and iscsi initiator) runs or whether vdsmd then clears its cache / routes
to a/the target(s) ?
Alex
On 28 February 2013 16:25, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
another screenshot of how confused it can get
alex
On 28 February 2013 15:36, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
> Hi there,
>
> I was doing some testing around ovirt and iscsi and found an issue where
> as when you use "dd" to create "backing-stores" for iscsi and you
point
> ovirt to it to discover & login, it thinks the LUN ID is the same although
> the target is different and adds additional paths to the config
> (automagically?) bringing down the iSCSI storage domain.
>
> See attached screenshot of what I got when trying to a "new iscsi san
> storage domain" to ovirt. The Storage Domain is now down and I cannot get
> rid of the config (???) how do I force it to logout of the targets ??
>
> Also, anyone know how to deal with the duplicate LUN ID issue ?
>
> Thanks
> Alex
>
> --
>
> | RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
>
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
4:16 a.m.
ok, so it looks like ovirt is creating PVs, VGs, and LVs associated to a
iSCSI disk ... now, when i try to add the other storage with the same LUN
ID - this is how it looks like :
[root@TESTHV01 ~]# pvs
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
WARNING: Volume Group 7d0f78ff-aa25-4b64-a2ea-c8a65beda616 is not
consistent
PV VG Fmt Attr
PSize PFree
/dev/mapper/1IET_00010001 7d0f78ff-aa25-4b64-a2ea-c8a65beda616 lvm2 a--
68.00g 54.12g
/dev/sda2 vg_root lvm2 a--
78.12g 0
/dev/sda3 vg_vol lvm2 a--
759.26g 0
[root@TESTHV01 ~]# vgs
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
WARNING: Inconsistent metadata found for VG
7d0f78ff-aa25-4b64-a2ea-c8a65beda616 - updating to use version 20
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
Automatic metadata correction failed
Recovery of volume group "7d0f78ff-aa25-4b64-a2ea-c8a65beda616" failed.
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
VG #PV #LV #SN Attr VSize VFree
vg_root 1 2 0 wz--n- 78.12g 0
vg_vol 1 1 0 wz--n- 759.26g 0
[root@TESTHV01 ~]# lvs
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
WARNING: Inconsistent metadata found for VG
7d0f78ff-aa25-4b64-a2ea-c8a65beda616 - updating to use version 20
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
Automatic metadata correction failed
Recovery of volume group "7d0f78ff-aa25-4b64-a2ea-c8a65beda616" failed.
Skipping volume group 7d0f78ff-aa25-4b64-a2ea-c8a65beda616
/dev/mapper/1IET_00010001: lseek 73266102272 failed: Invalid argument
LV VG Attr LSize Pool Origin Data% Move Log Copy%
Convert
lv_root vg_root -wi-ao--
68.36g
lv_swap vg_root -wi-ao--
9.77g
lv_vol vg_vol -wi-ao--
759.26g
VS
[root@TESTHV01 ~]# pvs
l PV VG Fmt Attr
PSize PFree
/dev/mapper/1IET_00010001 7d0f78ff-aa25-4b64-a2ea-c8a65beda616 lvm2 a--
68.00g 54.12g
/dev/sda2 vg_root lvm2 a--
78.12g 0
/dev/sda3 vg_vol lvm2 a--
759.26g 0
[root@TESTHV01 ~]# vgs
VG #PV #LV #SN Attr VSize VFree
7d0f78ff-aa25-4b64-a2ea-c8a65beda616 1 7 0 wz--n- 68.00g 54.12g
vg_root 1 2 0 wz--n- 78.12g 0
vg_vol 1 1 0 wz--n- 759.26g 0
[root@TESTHV01 ~]# lvs
LV VG
Attr LSize Pool Origin Data% Move Log Copy% Convert
fe6f8584-b6da-4ef0-8879-bf23022827d7 7d0f78ff-aa25-4b64-a2ea-c8a65beda616
-wi----- 10.00g
ids 7d0f78ff-aa25-4b64-a2ea-c8a65beda616
-wi-a--- 128.00m
inbox 7d0f78ff-aa25-4b64-a2ea-c8a65beda616
-wi-a--- 128.00m
leases 7d0f78ff-aa25-4b64-a2ea-c8a65beda616
-wi-a--- 2.00g
master 7d0f78ff-aa25-4b64-a2ea-c8a65beda616
-wi-ao-- 1.00g
metadata 7d0f78ff-aa25-4b64-a2ea-c8a65beda616
-wi-a--- 512.00m
outbox 7d0f78ff-aa25-4b64-a2ea-c8a65beda616
-wi-a--- 128.00m
lv_root vg_root
-wi-ao-- 68.36g
lv_swap vg_root
-wi-ao-- 9.77g
lv_vol vg_vol
-wi-ao-- 759.26g
Ovirt Node ( HV ) seems to use the LV created with in the same VG for the
storage domain as the disk for the VM. And this is how it'll look like -
various LVs are being created for the "management of the storage domain" (i
guess) :
Disk /dev/sdb: 73.4 GB, 73400320000 bytes
255 heads, 63 sectors/track, 8923 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/1IET_00010001: 73.4 GB, 73400320000 bytes
255 heads, 63 sectors/track, 8923 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-metadata: 536 MB,
536870912 bytes
255 heads, 63 sectors/track, 65 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-ids: 134 MB,
134217728 bytes
255 heads, 63 sectors/track, 16 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-leases: 2147 MB,
2147483648 bytes
255 heads, 63 sectors/track, 261 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-inbox: 134 MB,
134217728 bytes
255 heads, 63 sectors/track, 16 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-outbox: 134 MB,
134217728 bytes
255 heads, 63 sectors/track, 16 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-master: 1073 MB,
1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk
/dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-fe6f8584--b6da--4ef0--8879--bf23022827d7:
10.7 GB, 10737418240 bytes
255 heads, 63 sectors/track, 1305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0000c91a
Device Boot Start End Blocks Id System
/dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-fe6f8584--b6da--4ef0--8879
* 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/mapper/7d0f78ff--aa25--4b64--a2ea--c8a65beda616-fe6f8584--b6da--4ef0--8879
64 1306 9972736 8e Linux LVM
Now I wonder whether there is a MAX on the amount of iSCSI storage domains
you can have ? I'd think that that depends on the max of the device-mapper
? Is there a max ?
Alex
On 28 February 2013 16:30, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
FWIW, restarting the HV "resolves" the issue and brings the
storage domain
back up; but I dont know whether that is because that's where the target
(and iscsi initiator) runs or whether vdsmd then clears its cache / routes
to a/the target(s) ?
Alex
On 28 February 2013 16:25, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
> another screenshot of how confused it can get
>
> alex
>
>
> On 28 February 2013 15:36, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
>
>> Hi there,
>>
>> I was doing some testing around ovirt and iscsi and found an issue where
>> as when you use "dd" to create "backing-stores" for iscsi and
you point
>> ovirt to it to discover & login, it thinks the LUN ID is the same although
>> the target is different and adds additional paths to the config
>> (automagically?) bringing down the iSCSI storage domain.
>>
>> See attached screenshot of what I got when trying to a "new iscsi san
>> storage domain" to ovirt. The Storage Domain is now down and I cannot get
>> rid of the config (???) how do I force it to logout of the targets ??
>>
>> Also, anyone know how to deal with the duplicate LUN ID issue ?
>>
>> Thanks
>> Alex
>>
>> --
>>
>> | RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com|
>>
>
>
>
> --
>
> | RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
>
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
9:26 a.m.
The problem persists despite me trying to manually change LUN ID on the
target (scsi-target-utils installed on centos 6.3) .. does anyone know how
to make ovirt (or vdsm?) based on iqn + lun id ? I'd think it'd resolve the
issue I'm having.
Anyone ?
Thanks,
Alex
On 28 February 2013 16:30, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
FWIW, restarting the HV "resolves" the issue and brings the
storage domain
back up; but I dont know whether that is because that's where the target
(and iscsi initiator) runs or whether vdsmd then clears its cache / routes
to a/the target(s) ?
Alex
On 28 February 2013 16:25, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
> another screenshot of how confused it can get
>
> alex
>
>
> On 28 February 2013 15:36, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
>
>> Hi there,
>>
>> I was doing some testing around ovirt and iscsi and found an issue where
>> as when you use "dd" to create "backing-stores" for iscsi and
you point
>> ovirt to it to discover & login, it thinks the LUN ID is the same although
>> the target is different and adds additional paths to the config
>> (automagically?) bringing down the iSCSI storage domain.
>>
>> See attached screenshot of what I got when trying to a "new iscsi san
>> storage domain" to ovirt. The Storage Domain is now down and I cannot get
>> rid of the config (???) how do I force it to logout of the targets ??
>>
>> Also, anyone know how to deal with the duplicate LUN ID issue ?
>>
>> Thanks
>> Alex
>>
>> --
>>
>> | RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com|
>>
>
>
>
> --
>
> | RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
>
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
1:34 p.m.
----- Original Message -----
Hi there,
I was doing some testing around ovirt and iscsi and found an issue
where as when you use "dd" to create "backing-stores" for iscsi and
you point ovirt to it to discover & login, it thinks the LUN ID is
the same although the target is different and adds additional paths
to the config (automagically?) bringing down the iSCSI storage
domain.
There is no question about the behaviour, it's not a bug, that is the way multipathing
works (has nothing to do with oVirt). The GUID of a LUN has to be unique. multipathd
seeing the same LUN ID across multiple targets assumes that it's the same LUN with
multiple paths and that's how you get redundancy and load balancing.
Why tgtd doesn't take care of this built in I could never grok, but what you need to
do is edit your targets.conf and add the scsi_id and scsi_sn fields.
Example:
<target MasterBackup>
allow-in-use yes
<backing-store /dev/vg0/MasterBackup>
lun 1
scsi_id MasterBackup
scsi_sn 444444444401
</backing-store>
</target>
See attached screenshot of what I got when trying to a "new iscsi san
storage domain" to ovirt. The Storage Domain is now down and I
cannot get rid of the config (???) how do I force it to logout of
the targets ??
Also, anyone know how to deal with the duplicate LUN ID issue ?
Thanks
Alex
--
| RHCE | Senior Systems Engineer | www.vcore.co |
| www.vsearchcloud.com |
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
3:59 p.m.
This is a multi-part message in MIME format.
--------------000500010209060307080609
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Hi Ayal,
Thanks for that - I was thinking the same after I did some more testing
last week - e.g. shared a image file from a different iscsi target and
the same iscsi target, the lun on the "same target" changed, the one on
the "other target" did again the same - so I figured it had something to
do with tgtd.
Thanks for below, I was looking into those options to try next week :) ...
Thanks
Alex
On 03/03/2013 06:34 PM, Ayal Baron wrote:
----- Original Message -----
>
>
>
>
> Hi there,
>
> I was doing some testing around ovirt and iscsi and found an issue
> where as when you use "dd" to create "backing-stores" for iscsi
and
> you point ovirt to it to discover& login, it thinks the LUN ID is
> the same although the target is different and adds additional paths
> to the config (automagically?) bringing down the iSCSI storage
> domain.
There is no question about the behaviour, it's not a bug, that is the way
multipathing works (has nothing to do with oVirt). The GUID of a LUN has to be unique.
multipathd seeing the same LUN ID across multiple targets assumes that it's the same
LUN with multiple paths and that's how you get redundancy and load balancing.
Why tgtd doesn't take care of this built in I could never grok, but what you need to
do is edit your targets.conf and add the scsi_id and scsi_sn fields.
Example:
<target MasterBackup>
allow-in-use yes
<backing-store /dev/vg0/MasterBackup>
lun 1
scsi_id MasterBackup
scsi_sn 444444444401
</backing-store>
</target>
> See attached screenshot of what I got when trying to a "new iscsi san
> storage domain" to ovirt. The Storage Domain is now down and I
> cannot get rid of the config (???) how do I force it to logout of
> the targets ??
>
>
> Also, anyone know how to deal with the duplicate LUN ID issue ?
>
>
> Thanks
> Alex
>
>
>
>
>
> --
>
>
>
> | RHCE | Senior Systems Engineer | www.vcore.co |
> | www.vsearchcloud.com |
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
--------------000500010209060307080609
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit
<html>
<head>
<meta content="text/html; charset=UTF-8"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<font size="-1"><font face="Tahoma">Hi
Ayal,<br>
<br>
Thanks for that - I was thinking the same after I did some more
testing last week - e.g. shared a image file from a different
iscsi target and the same iscsi target, the lun on the "same
target" changed, the one on the "other target" did again the
same - so I figured it had something to do with tgtd. <br>
<br>
Thanks for below, I was looking into those options to try next
week :) ... <br>
<br>
Thanks<br>
Alex<br>
<br>
</font></font><br>
On 03/03/2013 06:34 PM, Ayal Baron wrote:
<blockquote
cite="mid:784356398.1626108.1362335643783.JavaMail.root@redhat.com"
type="cite">
<pre wrap="">
----- Original Message -----
</pre>
<blockquote type="cite">
<pre wrap="">
Hi there,
I was doing some testing around ovirt and iscsi and found an issue
where as when you use "dd" to create "backing-stores" for iscsi and
you point ovirt to it to discover & login, it thinks the LUN ID is
the same although the target is different and adds additional paths
to the config (automagically?) bringing down the iSCSI storage
domain.
</pre>
</blockquote>
<pre wrap="">
There is no question about the behaviour, it's not a bug, that is the way multipathing
works (has nothing to do with oVirt). The GUID of a LUN has to be unique. multipathd
seeing the same LUN ID across multiple targets assumes that it's the same LUN with
multiple paths and that's how you get redundancy and load balancing.
Why tgtd doesn't take care of this built in I could never grok, but what you need to
do is edit your targets.conf and add the scsi_id and scsi_sn fields.
Example:
<target MasterBackup>
allow-in-use yes
<backing-store /dev/vg0/MasterBackup>
lun 1
scsi_id MasterBackup
scsi_sn 444444444401
</backing-store>
</target>
</pre>
<blockquote type="cite">
<pre wrap="">
See attached screenshot of what I got when trying to a "new iscsi san
storage domain" to ovirt. The Storage Domain is now down and I
cannot get rid of the config (???) how do I force it to logout of
the targets ??
Also, anyone know how to deal with the duplicate LUN ID issue ?
Thanks
Alex
--
| RHCE | Senior Systems Engineer | <a class="moz-txt-link-abbreviated"
href="http://www.vcore.co">www.vcore.co</a> |
| <a class="moz-txt-link-abbreviated"
href="http://www.vsearchcloud.com">www.vsearchcloud.com</a> |
_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated"
href="mailto:Users@ovirt.org">Users@ovirt.org</a>
<a class="moz-txt-link-freetext"
href="http://lists.ovirt.org/mailman/listinfo/users">http://...
</pre>
</blockquote>
</blockquote>
</body>
</html>
--------------000500010209060307080609--
10:35 a.m.
Hi,
I just tested this with this config :
<target iqn.2013-02.local.vm:iscsi.lun1>
<backing-store /vol/scsi.img>
vendor_id ISCSI-MULTIPATH
scsi_id MULTIPATHTEST
scsi_sn 990000100001
lun 1
</backing-store>
</target>
However, upon discovery / login, the LUN ID was again :
1IET_0000100001
Alex
On 3 March 2013 18:34, Ayal Baron <abaron(a)redhat.com> wrote:
----- Original Message -----
>
>
>
>
>
> Hi there,
>
> I was doing some testing around ovirt and iscsi and found an issue
> where as when you use "dd" to create "backing-stores" for iscsi
and
> you point ovirt to it to discover & login, it thinks the LUN ID is
> the same although the target is different and adds additional paths
> to the config (automagically?) bringing down the iSCSI storage
> domain.
There is no question about the behaviour, it's not a bug, that is the way
multipathing works (has nothing to do with oVirt). The GUID of a LUN has
to be unique. multipathd seeing the same LUN ID across multiple targets
assumes that it's the same LUN with multiple paths and that's how you get
redundancy and load balancing.
Why tgtd doesn't take care of this built in I could never grok, but what
you need to do is edit your targets.conf and add the scsi_id and scsi_sn
fields.
Example:
<target MasterBackup>
allow-in-use yes
<backing-store /dev/vg0/MasterBackup>
lun 1
scsi_id MasterBackup
scsi_sn 444444444401
</backing-store>
</target>
>
> See attached screenshot of what I got when trying to a "new iscsi san
> storage domain" to ovirt. The Storage Domain is now down and I
> cannot get rid of the config (???) how do I force it to logout of
> the targets ??
>
>
> Also, anyone know how to deal with the duplicate LUN ID issue ?
>
>
> Thanks
> Alex
>
>
>
>
>
> --
>
>
>
> | RHCE | Senior Systems Engineer | www.vcore.co |
> | www.vsearchcloud.com |
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
12:11 p.m.
Ok, so finally got this working, anyone know how to change the timeout for
multipathd from say 120 seconds to ~10 seconds ?
==> /var/log/messages <==
Mar 4 17:09:12 TESTHV01 kernel: session5: session recovery timed out after
120 secs
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] Unhandled error code
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] Result:
hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] CDB: Read(10): 28 00 00
04 08 00 00 00 08 00
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] Unhandled error code
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] Result:
hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] CDB: Read(10): 28 00 00
00 00 00 00 00 08 00
Alex
On 4 March 2013 15:35, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
Hi,
I just tested this with this config :
<target iqn.2013-02.local.vm:iscsi.lun1>
<backing-store /vol/scsi.img>
vendor_id ISCSI-MULTIPATH
scsi_id MULTIPATHTEST
scsi_sn 990000100001
lun 1
</backing-store>
</target>
However, upon discovery / login, the LUN ID was again :
1IET_0000100001
Alex
On 3 March 2013 18:34, Ayal Baron <abaron(a)redhat.com> wrote:
>
>
> ----- Original Message -----
> >
> >
> >
> >
> >
> > Hi there,
> >
> > I was doing some testing around ovirt and iscsi and found an issue
> > where as when you use "dd" to create "backing-stores" for
iscsi and
> > you point ovirt to it to discover & login, it thinks the LUN ID is
> > the same although the target is different and adds additional paths
> > to the config (automagically?) bringing down the iSCSI storage
> > domain.
>
> There is no question about the behaviour, it's not a bug, that is the way
> multipathing works (has nothing to do with oVirt). The GUID of a LUN has
> to be unique. multipathd seeing the same LUN ID across multiple targets
> assumes that it's the same LUN with multiple paths and that's how you get
> redundancy and load balancing.
> Why tgtd doesn't take care of this built in I could never grok, but what
> you need to do is edit your targets.conf and add the scsi_id and scsi_sn
> fields.
>
> Example:
> <target MasterBackup>
> allow-in-use yes
> <backing-store /dev/vg0/MasterBackup>
> lun 1
> scsi_id MasterBackup
> scsi_sn 444444444401
> </backing-store>
> </target>
>
> >
> > See attached screenshot of what I got when trying to a "new iscsi san
> > storage domain" to ovirt. The Storage Domain is now down and I
> > cannot get rid of the config (???) how do I force it to logout of
> > the targets ??
> >
> >
> > Also, anyone know how to deal with the duplicate LUN ID issue ?
> >
> >
> > Thanks
> > Alex
> >
> >
> >
> >
> >
> > --
> >
> >
> >
> > | RHCE | Senior Systems Engineer | www.vcore.co |
> > | www.vsearchcloud.com |
> >
> > _______________________________________________
> > Users mailing list
> > Users(a)ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
> >
>
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
8:11 a.m.
For those still interested, t
he timeout issue doesnt occur on the
m
ultipath side, nor ovirt
,
but on the iscsid config side of things -
To shorten the timeout and fail a path faster, edit
/etc/iscsi/iscsid.conf
C
hange the value
node.session.timeo.replacement_timeout = 1
2
0
t
o something more useful, like I changed it to "10"
Reloading iscsid's config does nothing
,
you'll have to restart the host for it to work.
Alex
On 4 March 2013 17:11, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
Ok, so finally got this working, anyone know how to change the
timeout for
multipathd from say 120 seconds to ~10 seconds ?
==> /var/log/messages <==
Mar 4 17:09:12 TESTHV01 kernel: session5: session recovery timed out
after 120 secs
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] Unhandled error code
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] Result:
hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] CDB: Read(10): 28 00
00 04 08 00 00 00 08 00
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] killing request
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: rejecting I/O to offline
device
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] Unhandled error code
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] Result:
hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Mar 4 17:09:12 TESTHV01 kernel: sd 7:0:0:99: [sdd] CDB: Read(10): 28 00
00 00 00 00 00 00 08 00
Alex
On 4 March 2013 15:35, Alex Leonhardt <alex.tuxx(a)gmail.com> wrote:
> Hi,
>
> I just tested this with this config :
>
>
> <target iqn.2013-02.local.vm:iscsi.lun1>
> <backing-store /vol/scsi.img>
> vendor_id ISCSI-MULTIPATH
> scsi_id MULTIPATHTEST
> scsi_sn 990000100001
> lun 1
> </backing-store>
> </target>
>
>
> However, upon discovery / login, the LUN ID was again :
>
> 1IET_0000100001
>
>
> Alex
>
>
>
>
> On 3 March 2013 18:34, Ayal Baron <abaron(a)redhat.com> wrote:
>
>>
>>
>> ----- Original Message -----
>> >
>> >
>> >
>> >
>> >
>> > Hi there,
>> >
>> > I was doing some testing around ovirt and iscsi and found an issue
>> > where as when you use "dd" to create "backing-stores"
for iscsi and
>> > you point ovirt to it to discover & login, it thinks the LUN ID is
>> > the same although the target is different and adds additional paths
>> > to the config (automagically?) bringing down the iSCSI storage
>> > domain.
>>
>> There is no question about the behaviour, it's not a bug, that is the
>> way multipathing works (has nothing to do with oVirt). The GUID of a LUN
>> has to be unique. multipathd seeing the same LUN ID across multiple
>> targets assumes that it's the same LUN with multiple paths and that's
how
>> you get redundancy and load balancing.
>> Why tgtd doesn't take care of this built in I could never grok, but what
>> you need to do is edit your targets.conf and add the scsi_id and scsi_sn
>> fields.
>>
>> Example:
>> <target MasterBackup>
>> allow-in-use yes
>> <backing-store /dev/vg0/MasterBackup>
>> lun 1
>> scsi_id MasterBackup
>> scsi_sn 444444444401
>> </backing-store>
>> </target>
>>
>> >
>> > See attached screenshot of what I got when trying to a "new iscsi san
>> > storage domain" to ovirt. The Storage Domain is now down and I
>> > cannot get rid of the config (???) how do I force it to logout of
>> > the targets ??
>> >
>> >
>> > Also, anyone know how to deal with the duplicate LUN ID issue ?
>> >
>> >
>> > Thanks
>> > Alex
>> >
>> >
>> >
>> >
>> >
>> > --
>> >
>> >
>> >
>> > | RHCE | Senior Systems Engineer | www.vcore.co |
>> > | www.vsearchcloud.com |
>> >
>> > _______________________________________________
>> > Users mailing list
>> > Users(a)ovirt.org
>> > http://lists.ovirt.org/mailman/listinfo/users
>> >
>>
>
>
>
> --
>
> | RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
>
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
--
| RHCE | Senior Systems Engineer | www.vcore.co | www.vsearchcloud.com |
4081
days inactive
4087
days old
9 comments
2 participants
participants (2)
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Alex Leonhardt -
Ayal Baron