It depends what type of image you are booting.

If you are using a 3-part image, where the kernel and the initrd were 
originally outside of the root disk, then I've never tested how to make the 
necessary changes so the next boot pulls the kernel/initrd out from the image.

If the original image was a single-part and the kernel/initrd were extracted 
automatically at boot time then yes, simply updating grub.conf to reference the 
new kernel+initrd should be sufficient.

Bob

From: Qin Jia [mailto:jiaqin1...@gmail.com]
Sent: 23 September 2013 05:57
To: openstack@lists.openstack.org
Subject: [Openstack] Loading Kernel Module during reboot

Hello,

I have openstack run on top of Xenserver. I have created images (initrd and 
kernel images)  inside the /boot directory of the instance. I was wondering if 
it is possible to load the image during rebooting of the instance by changing 
the grub.conf?

Thanks,
Qin
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