[ovirt-users] iSCSI Discovery cannot detetect LUN
Eduardo Mayoral
emayoral at arsys.es
Wed Mar 29 09:59:46 UTC 2017
I had a similar problem, in my case this was related to multipath, it
was not masking the LUNs correctly, it was seeing it multiple times (one
per path), and I could not select the LUNs in the oVirt interface.
Once I configured multipath correctly, everything worked like a charm.
Best regards,
--
Eduardo Mayoral.
On 29/03/17 11:30, Lukáš Kaplan wrote:
> Hello all,
>
> I did all steps as I described in previous email, but no change. I
> can't see any LUN after discovery and login of new iSCSI storage.
> (That storage is ok, if I try to connect it to another and older ovirt
> domain, it is working...)
>
> I tryed it on 3 new iSCSI targets alredy, all have same problem...
>
> Can somebody help me, please?
>
> --
> Lukas Kaplan
>
>
> 2017-03-27 16:22 GMT+02:00 Lukáš Kaplan <lkaplan at dragon.cz
> <mailto:lkaplan at dragon.cz>>:
>
> I did following steps:
> - delete target on all initiators (ovirt nodes)
> iscsiadm -m node -T iqn.2017-03.cz.dragon.ovirt.fuvs-sn1:10T -p
> 10.53.1.201:3260 <http://10.53.1.201:3260> -u
> iscsiadm -m node -T iqn.2017-03.cz.dragon.ovirt.fuvs-sn1:10T -p
> 10.53.1.201:3260 <http://10.53.1.201:3260> -o delete
> - stop tgtd on target
> - fill storage by zeroes (dd if=/dev/zero of=/dev/md125 bs=4096
> status=progress)
> - start tgtd
> - tried to connect to ovirt (Discovery=ok, Login=ok, but can not
> see any LUN).
>
> === After that I ran this commands on one node: ===
>
> [root at fudi-cn1 ~]# iscsiadm -m session -o show
> tcp: [1] 10.53.0.10:3260 <http://10.53.0.10:3260>,1
> iqn.2017-03.cz.dragon.ovirt:ovirtengine (non-flash)
> tcp: [11] 10.53.0.201:3260 <http://10.53.0.201:3260>,1
> iqn.2017-03.cz.dragon.ovirt.fudi-sn1:10T (non-flash)
> tcp: [12] 10.53.1.201:3260 <http://10.53.1.201:3260>,1
> iqn.2017-03.cz.dragon.ovirt.fuvs-sn1:10T (non-flash)
>
> [root at fudi-cn1 ~]# iscsiadm -m discoverydb -P1
> SENDTARGETS:
> DiscoveryAddress: 10.53.0.201,3260
> Target: iqn.2017-03.cz.dragon.ovirt:ovirtengine
> Portal: 10.53.0.201:3260 <http://10.53.0.201:3260>,1
> Iface Name: default
> iSNS:
> No targets found.
> STATIC:
> Target: iqn.2017-03.cz.dragon.ovirt.fuvs-sn1:10T
> Portal: 10.53.1.201:3260 <http://10.53.1.201:3260>,1
> Iface Name: default
> Target: iqn.2017-03.cz.dragon.ovirt:ovirtengine
> Portal: 10.53.0.10:3260 <http://10.53.0.10:3260>,1
> Iface Name: default
> Target: iqn.2017-03.cz.dragon.ovirt.fudi-sn1:10T
> Portal: 10.53.0.201:3260 <http://10.53.0.201:3260>,1
> Iface Name: default
> FIRMWARE:
> No targets found.
>
> === On iscsi target: ===
> [root at fuvs-sn1 ~]# cat /proc/mdstat
> Personalities : [raid1] [raid6] [raid5] [raid4]
> md125 : active raid6 sdl1[11] sdk1[10] sdj1[9] sdi1[8] sdh1[7]
> sdg1[6] sdf1[5] sde1[4] sdd1[3] sdc1[2] sdb1[1] sda1[0]
> 9766302720 blocks super 1.2 level 6, 512k chunk, algorithm 2
> [12/12] [UUUUUUUUUUUU]
> bitmap: 0/8 pages [0KB], 65536KB chunk
> ...etc...
>
>
> [root at fuvs-sn1 ~]# cat /etc/tgt/targets.conf
> default-driver iscsi
>
> <target iqn.2017-03.cz.dragon.ovirt.fuvs-sn1:10T>
> # provided devicce as a iSCSI target
> backing-store /dev/md125
> # iSCSI Initiator's IP address you allow to connect
> #initiator-address 10.53.0.0/23 <http://10.53.0.0/23>
> </target>
>
> --
> Lukas Kaplan
>
> 2017-03-25 12:36 GMT+01:00 Lukas Kaplan <lkaplan at dragon.cz
> <mailto:lkaplan at dragon.cz>>:
>
> Co muze myslet tim mappingem?
>
> Jinak muzu zkusit ddckem celou storage prepsat nulami.
>
> co ty na to?
>
> Odesláno z iPhonu
>
> Začátek přeposílané zprávy:
>
>> *Od:* Yaniv Kaul <ykaul at redhat.com <mailto:ykaul at redhat.com>>
>> *Datum:* 24. března 2017 23:25:21 SEČ
>> *Komu:* Lukáš Kaplan <lkaplan at dragon.cz
>> <mailto:lkaplan at dragon.cz>>
>> *Kopie:* users <users at ovirt.org <mailto:users at ovirt.org>>
>> *Předmět:* *Re: [ovirt-users] iSCSI Discovery cannot detetect
>> LUN*
>>
>>
>>
>> On Fri, Mar 24, 2017 at 1:34 PM, Lukáš Kaplan
>> <lkaplan at dragon.cz <mailto:lkaplan at dragon.cz>> wrote:
>>
>> Hello all,
>>
>> please do you have some experience with troubleshooting
>> adding of iSCSI domain to ovirt 4.1.1?
>>
>> I am chalenging this issue now:
>>
>> 1) I have successfuly installed oVirt 4.1.1 environment
>> with self-hosted engine, 3 nodes and 3 storages (iSCSI
>> Master domain, iSCSI for hosted engine and NFS ISO
>> domain). Everything is working now.
>>
>> 2) But, when I want to add new iSCSI domain, I can
>> discover it, I can login, but I cant see any LUN on that
>> storage. (I had same problem in oVirt 4.1.0, so I made
>> upgrade to 4.1.1)
>>
>>
>> Are you sure mappings are correct?
>> Can you ensure the LUN is empty?
>> Y.
>>
>>
>> 3) Then I tryed to add this storage to another oVirt
>> environment (oVirt 3.6) and there are no problem. I can
>> see LUN on that storage and I can connect it to oVirt.
>>
>> I tryed to examine vdsm.log, but it is very detailed and
>> unredable for me :-/
>>
>> Thak you in advance, have a nice day,
>> --
>> Lukas Kaplan
>>
>>
>>
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>>
>
>
>
>
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