T13 (4.2.11) ReadyNAS 3200. iSCSI storage connection failed

[iam]

Hello!

Can't connect new iSCSI storage using CHAP to XenServer 5.5. Is says the next on stage of searching IQNs: "Logging into the iSCSI target failed. Check your username and password". Certainly I've checked it 10 times before post a message.

With 4.2.9 connecting using chap worked well.

Sincerely
Kirill

PS Without using chap authentiction storage connects without problems.

[jeremyotten]

This really needs to be fixed before final. Otherwise we cannot upgrade.

[Chewbacca]

iam: I was able to reproduce your issue here and will have our engineer look into it.

[iam]

Hello Chewbacca!

Sounds good. Waiting for repair.

[chirpa]

Next firmware should have a work-around for it. Will require a small add-on to toggle a setting for it.

Comes down to Xen not supporting discovery and target CHAP separately. Previous RAIDiator ignored CHAP on discovery level, but used it on the targets. Newer version can support it on both. Most initiators (MS for example), can set CHAP per discovery and per target. XenServer only allows it once, globally. So with the new RAIDiator, Xen would fail on the discovery step, incorrect CHAP.

The add-on will use the first targets CHAP info as the discovery CHAP as well.

[jeremyotten]

Stupid Xen. But if I already have a system configured with chap no discovery need to be done right.. so then an NAS upgrade should work without a problem or not?

[chirpa]

Not sure, haven't tried that myself. It may still probe the system on connect with discovery before attempting connect to the LUN, to verify it still exists.

[jeremyotten]

Ok but then when I do upgrade + addon fix for xenserver I should have to change anything at my xenserver side..... right.

[chirpa]

Is the NAS with the iSCSI targets being used dedicated for Xen? As long as you are using the same CHAP info across the NAS, should be no change at all. If you have a mixture of CHAPs, might encounter something.

[jeremyotten]

Yes only for iscsi. just one target and lun with chap.

[chirpa]

You'll be fine then. If you want to try out the T21 beta, I'll get you an add-on to try tomorrow. If you have SSH, you can do the process manually alternatively if you prefer.

Just need to do this:

Code: Select all

echo SET_ISCSI_DISCOVERY_AUTH=1 >> /etc/default/services
reboot

[jeremyotten]

Sorry cannot test this. Its in an production environment. We need to ensure all is stable version and tested in your labs before we will upgrade. Its far to risky otherwise.

[chirpa]

When 4.2.11 is final release, an add-on will be available with it. You can install the add-on first, then upgrade, so on your first reboot after upgrade, the settings will take affect. That line I show above won't do anything on releases below 4.2.11-T21.

[chirpa]

Kirill/Jeremy,

In the release notes for RAIDiator-x86 4.2.11, you will notice a Limitation item listed at the bottom of the notes in regards to this issue.

http://www.readynas.com/?p=3728

[jeremyotten]

OK we now have firmware 4.2.8. Do I then have to do the toggle and after that upgrade? What is my upgrade scenario and.... is this tested in your lab..