Il 19/01/2014 06:55, Blaster ha scritto:
On Jan 18, 2014, at 2:25 AM, Amedeo Salvati <amedeo@oscert.net> wrote:
regarding virtio drivers, on linux, and if your kernel support them, you can recreate / regenerate initram f.s., and then you can boot your vm linux coming from vmware with virtio drivers... same process when doing p2v or v2p
Do you have a good tutorial on this? I was wondering if this would be a needed step when doing a P2V. It would be nice if the virtio drivers were included by default.
no I haven't any tutorial... but it's not so complicated; if your physical host has recent kernel they have support for virtio drivers (I don't remember from which exactly rhel version virtio was included, but probably was rhel5.4, and on ubuntu 10.04 also was included) the only things to pay attention is to regenerate initramfs for the new virtual env, because when you installed a physical machine, it detected what drivers they could use to boot (for example on hp DL|BL it could be cciss driver, and so initram f.s. on those hosts has cciss.ko module to properly access to hp smart array disks) so you can check your current initramfs of physical host, if has virtio drivers by simply decompress it: mkdir /tmp/initram cp -p /boot/initramfs-2.6.32-431.el6.x86_64.img /tmp/initram/ <--- use your current kernel version cd /tmp/initram/ mv initramfs-2.6.32-431.el6.x86_64.img initramfs-2.6.32-431.el6.x86_64.img.gz gunzip initramfs-2.6.32-431.el6.x86_64.img.gz cpio -idv < ./initramfs-2.6.32-431.el6.x86_64.img now you can check if there are virtio drivers by: find /tmp/initram/lib/modules/2.6.32-431.el6.x86_64 -name '*virtio*' /tmp/initram/lib/modules/2.6.32-431.el6.x86_64/kernel/drivers/virtio /tmp/initram/lib/modules/2.6.32-431.el6.x86_64/kernel/drivers/virtio/virtio.ko /tmp/initram/lib/modules/2.6.32-431.el6.x86_64/kernel/drivers/virtio/virtio_ring.ko /tmp/initram/lib/modules/2.6.32-431.el6.x86_64/kernel/drivers/virtio/virtio_pci.ko /tmp/initram/lib/modules/2.6.32-431.el6.x86_64/kernel/drivers/scsi/virtio_scsi.ko /tmp/initram/lib/modules/2.6.32-431.el6.x86_64/kernel/drivers/block/virtio_blk.ko if there aren't you must regenerate it by using: dracut on rhel6 mkinitramfs on debian/ubuntu mkinitrd on rhel5, suse and gentoo HTH p.s. if I remember I've rebuilded initram f.s. only on rhel4|5 on p2v and v2p, and obviously for virtio drivers and cciss driver (v2p) -- Amedeo Salvati RHC{DS,E,VA} - LPIC-3 - UCP - NCLA 11 email: amedeo@oscert.net email: amedeo@linux.com http://plugcomputing.it/redhatcert.php http://plugcomputing.it/lpicert.php