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drescherjm
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Joined: 05 Jun 2004
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Location: Pittsburgh, PA, USA
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 Posted: Sun Dec 06, 2009 9:00 pm Post subject: writing udev rules for lvm volume groups. |
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Basically I want to do what is in this ubuntu thread:
http://ubuntuforums.org/showthread.php?t=946858
I need:
# ls /dev/vg_2t0 -ald
drwx------ 2 root root 140 Dec 5 20:33 /dev/vg_2t0
to be
drwxr-x--- 2 root disk 140 Dec 5 20:33 /dev/vg_2t0
I have written udev rules in the past but not sure what to do with lvm
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richard.scott
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Joined: 19 May 2003
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Location: Oxfordshire, UK
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| Posted: Mon Dec 07, 2009 11:57 am Post subject: |
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| Could you use the device in /dev/mapper? |
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drescherjm
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| Posted: Mon Dec 07, 2009 2:26 pm Post subject: |
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I believe that is an option. The purpose of this is I need to give kvm users full access to the raw lvm partition.
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richard.scott
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| Posted: Mon Dec 07, 2009 2:31 pm Post subject: |
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how do you configure kvm to see the device?
Is there a command you run to start each kvm instance? |
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drescherjm
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| Posted: Mon Dec 07, 2009 2:35 pm Post subject: |
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something like
| Code: | | qemu-system-x86_64 -smp 3 -m 3096 /dev/vg_2t0/kvm_disk -usbdevice tablet -vnc :1 |
There is also some need for using virtualbox with the same raw disk. So I have created a .vmdk for that.
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richard.scott
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| Posted: Mon Dec 07, 2009 2:41 pm Post subject: |
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| I take it you run that as root? or does the user run that command? |
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drescherjm
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| Posted: Mon Dec 07, 2009 2:51 pm Post subject: |
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At first I had the problem and use sudo to get around that. Later I manually changed the permissions so I did not need sudo and that worked fine. After that I did a google search for writing udev rules for lvm but that did not turn up the answer so I asked here..
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drescherjm
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| Posted: Mon Dec 07, 2009 2:53 pm Post subject: |
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I believe writing a udev rule for just
/dev/mapper/vg_2t0-kvm_disk
will work and probably be a lot simpler.
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opotonil
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Joined: 17 Jun 2005
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drescherjm
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| Posted: Mon Dec 07, 2009 8:36 pm Post subject: |
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Thanks. On top of the code blocks, I actually can read some of that...
However I guarantee your English is better than my spanish.
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