Is that really possible (KVM guest <-> z/VM guest)? As far as I am aware the KVM and zVM hypervisors share no metadata regarding the guest's set up. Nor do they share any of the protocols used in live (or dead) guest relocation.
Am I misunderstanding the question? Richard Richard J Moore -- Z millicode & zVM development Ext: (M) 37264807/ (L) 37247072; Cell: (+44) (0)7739-875237 Office: (+44) (0)1962-817072 IBM Academy Member - http://www-03.ibm.com/ibm/academy/index.html Linkedin Profile http://uk.linkedin.com/pub/richard-j-moore-fiet-fbcs-ceng-citp/4/4b1/748 From: Christian Borntraeger <[email protected]> To: [email protected] Date: 01/12/2020 06:35 Subject: [EXTERNAL] Re: Moving a Linux guest from z/VM to KVM? Sent by: Linux on 390 Port <[email protected]> On 30.11.20 21:10, Mark Post wrote: > On 11/30/20 1:16 PM, Alan Haff wrote: >> I have a number of Linux guests running under z/VM. I'd like to move some of them to a KVM host running in another LPAR. Naively I tried DDRing a guest's disks to new volumes and IPLing off of the new volumes. No luck, the virtio modules aren't available in the guest so it can't see any DASD. >> >> Has someone put together a recipe for moving a guest from z/VM to KVM? Or am I heading down a dead end? > > I'm not aware of one, but I wouldn't call it a dead end, either. As a > first step, I would rebuild the initrd with whatever parameters are > needed to include the virtio drivers, then try again. I have to think > that /etc/fstab entries would need to be looked at as well. Look at the virtualization cookbook 5 from the redbooks. http://www.redbooks.ibm.com/abstracts/sg248463.html?Open chapter 8.7 contains information how to configure a system as such that it can be moved forth and back between LPAR and KVM. That should then also be possible with z/VM. If done right that should allow you to move the guest forth and back between KVM and z/VM. Basic idea: make sure the initrd has classic (DASD) drivers and the virtio-blk driver and then use driver independent names for the partitions. CC Viktor, do we still have our presentation flying around somewhere? ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390 Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390
