Re: Moving a Linux guest from z/VM to KVM?
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 lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390
Re: Moving a Linux guest from z/VM to KVM?
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. I seem to recall that Micro Focus acquired the Platespin products. It might be instructive to see what those do for Intel systems that are to be moved to KVM as a model. Mark Post -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390
Moving a Linux guest from z/VM to KVM?
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? -- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www2.marist.edu/htbin/wlvindex?LINUX-390
