udev rule on VM

Yong Huang <[email protected]> Tue, 13 Sep 2016 20:21:29 +0000 (UTC)
Newsgroups gmane.linux.redhat.general
Message-ID <[email protected]>
On RHEL 6 or 7, in a guest OS in the VMWare environment, not using multipaths, is there a danger to specify the udev rule as follows?

KERNEL=="sdb1", OWNER="oracle", GROUP="dba",...

Currently we use this rule:

KERNEL=="sd?1", SUBSYSTEM=="block", PROGRAM=="/usr/lib/udev/scsi_id -g -u -d /dev/$parent", RESULT=="<UUID returned by scsi_id>", OWNER="oracle", GROUP="dba",...

VM may be relevant here. You have to set disk.enableUUID=true in vSphere to get the UUID.

The concern is that the label sdb for this specific disk may change under certain conditions, maybe after inserting a new hard disk which happens to be scanned earlier than this one on next reboot. I think that would be true if this was not a VM. How about on a VM? Thanks.

-- 
redhat-list mailing list
unsubscribe mailto:[email protected]?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/redhat-list