[ovirt-users] FW: gluster and multipath

[Bill Dossett]

Fumble fingered accidental send...



From: Bill Dossett
Sent: 09 April 2015 11:33
To: users at ovirt.org
Subject: gluster and multipath

Hi,

Just got very confused trying to add create an additional brick on my gluster node (I had created one yesterday and all was fine0

I had already created a partition on my /dev/sdb called sdb1

But when I tried mkfs.xfs  (I am using xfs as that was in the example I was following - if LVM or something else would be better I am open to suggestions!)

It said /dev/sdb1 no such file or directory - which confused me as this worked yesterday.

I deleted the partition recreated it and tried and then it said that the device was busy.

It appears that multipathd is the culprit... but what I am struggling with is why it worked yesterday??  I may have created the partition before I pushed the gluster install to it from the ovirt-engine?  And does that install multipathd and it is now grabbing my devices?  It is the only thing I can think of.

And if that is the case - I guess I have to blacklist these devices in multipath.conf while I create the partitions?  And reboot and then remove the blacklist and reboot - seems a bit clunky, is there a better way to add partitions and bricks?

Or I am just in a vortex wormhole of misunderstanding and grasping at stars to try and pull myself out ?

Thankyou for any advice - especially as this may not be so ovirt or a question, but it's what I am working on.



Bill Dossett
Systems Architect

Tech Central - Global Engineering Services

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