4:11 p.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 |