[linux-lvm] re-activate lv after reboot ?

[linux-lvm] re-activate lv after reboot ?

[vu pham]

My server uses iscsiadm to access a remote iscsi device. VG and LV are 
created on that device and can be accessed just fine.
The problem is after reboot, the LVs are in inactive mode and I have to 
run vgchange -a y to activate the VG on the iscsi device or to put that 
command /etc/rcd./rc.local.

Is there any way to automatically to activate those LVs/VGs when the 
iscsi device starts ?

Thanks,
Vu

Re: [linux-lvm] re-activate lv after reboot ?

[Eric Brunson]

On 04/21/2009 09:47 AM, vu pham wrote:
> My server uses iscsiadm to access a remote iscsi device. VG and LV are 
> created on that device and can be accessed just fine.
> The problem is after reboot, the LVs are in inactive mode and I have 
> to run vgchange -a y to activate the VG on the iscsi device or to put 
> that command /etc/rcd./rc.local.

In RH and Fedora you need to updated your initrd image to have the 
drivers for the disk access available before the real filesystems are 
mounted.  You don't mention what distro you're using, so I'll avoid 
boring you with details that may not be pertinent to your situation.

>
> Is there any way to automatically to activate those LVs/VGs when the 
> iscsi device starts ?
>
> Thanks,
> Vu
>
> _______________________________________________
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Re: [linux-lvm] re-activate lv after reboot ?

[vu pham]

Eric Brunson wrote:
> On 04/21/2009 09:47 AM, vu pham wrote:
>> My server uses iscsiadm to access a remote iscsi device. VG and LV are 
>> created on that device and can be accessed just fine.
>> The problem is after reboot, the LVs are in inactive mode and I have 
>> to run vgchange -a y to activate the VG on the iscsi device or to put 
>> that command /etc/rcd./rc.local.
> 
> In RH and Fedora you need to updated your initrd image to have the 
> drivers for the disk access available before the real filesystems are 
> mounted.  You don't mention what distro you're using, so I'll avoid 
> boring you with details that may not be pertinent to your situation.
> 

Hi Eric, thanks for your reply. I am using RHEL5.3

Thanks again.

Vu

Re: [linux-lvm] re-activate lv after reboot ?

[Eric Brunson]

On 04/21/2009 10:04 AM, vu pham wrote:
> Eric Brunson wrote:
>> On 04/21/2009 09:47 AM, vu pham wrote:
>>> My server uses iscsiadm to access a remote iscsi device. VG and LV 
>>> are created on that device and can be accessed just fine.
>>> The problem is after reboot, the LVs are in inactive mode and I have 
>>> to run vgchange -a y to activate the VG on the iscsi device or to 
>>> put that command /etc/rcd./rc.local.
>>
>> In RH and Fedora you need to updated your initrd image to have the 
>> drivers for the disk access available before the real filesystems are 
>> mounted.  You don't mention what distro you're using, so I'll avoid 
>> boring you with details that may not be pertinent to your situation.
>>
>
> Hi Eric, thanks for your reply. I am using RHEL5.3
>


In Fedora (and I assume RH) you can specify additional kernel modules to 
include in the initrd image:

foxtrot(~)$ cat /etc/sysconfig/mkinitrd
MODULES="usb-storage"

This will also "stick" across kernel upgrades as mkinitrd is part of the 
kernel post-install process.

I don't know anything about iscsiadm, if it's simply a kernel module, 
then you can add it as I added usb-storage, if it's a process that has 
to be running, that may be more difficult to add to your boot process.

That's the extent of my expertise, so maybe someone familiar with 
iscsiadm may chime in.

Hope that helps,
e.

Re: [linux-lvm] re-activate lv after reboot ?

[Edward Choi]

On Tue, Apr 21, 2009 at 11:47 PM, vu pham <vu@sivell.com> wrote:
> My server uses iscsiadm to access a remote iscsi device. VG and LV are
> created on that device and can be accessed just fine.
> The problem is after reboot, the LVs are in inactive mode and I have to run
> vgchange -a y to activate the VG on the iscsi device or to put that command
> /etc/rcd./rc.local.
>
> Is there any way to automatically to activate those LVs/VGs when the iscsi
> device starts ?
>

First make sure node.startup is set to automatic in /etc/iscsi/iscsi.conf. Then
you can edit /etc/fstab and mount your lv using _netdev.

--
Regards,
Edward Choi.

Re: [linux-lvm] re-activate lv after reboot ?

[Vu Pham]

Edward Choi wrote:
> On Tue, Apr 21, 2009 at 11:47 PM, vu pham <vu@sivell.com> wrote:
>> My server uses iscsiadm to access a remote iscsi device. VG and LV are
>> created on that device and can be accessed just fine.
>> The problem is after reboot, the LVs are in inactive mode and I have to run
>> vgchange -a y to activate the VG on the iscsi device or to put that command
>> /etc/rcd./rc.local.
>>
>> Is there any way to automatically to activate those LVs/VGs when the iscsi
>> device starts ?
>>
> 
> First make sure node.startup is set to automatic in /etc/iscsi/iscsi.conf. Then
> you can edit /etc/fstab and mount your lv using _netdev.
> 

Hi Ed, thanks for your reply. I did not say clearly in my original post. 
The server accesses this iscsi device as the back-end disk device for 
some domUs so it never mounts the LVs as system files.

Vu