use the kernel from elrepo, it has xen support build in... --- ------ Greetz Am 19.09.2020 19:26, schrieb Chris Wik: > We tried to get CentOS 8 domU working in PV mode as well but did not > have any success and ended up deploying it in HVM mode. > > The reason OP have was lack of hardware support for HVM. This wasn't > our rationale for wanting to run in PV mode. Our rationale was that we > prefer to deploy CentOS 7 VMs on LVs which are formatted and deployed > from an image on dom0 and don't have any partition table. This makes > snapshotting, mounting, backing up and migrating very simple. We have > written a number of scripts over the years that needed extensive > modification to work with HVM VMs but in the end we ended up doing it > because we couldn't get PV mode working. And we accepted that HVM is > the future so might as well take the opportunity to adapt our ways. > > If anyone manages to get PV mode working I'd still like to know. > > Chris > > On September 19, 2020 7:08:28 PM GMT+02:00, "Radosław Piliszek" > <radoslaw.piliszek at gmail.com> wrote: > >> Hi, >> >> In general, PV tends not to be supported in newer distribution >> releases. >> This is mostly due to HVM performance and flexibility nowadays, >> which >> just was not the case back in the days when PV ruled. >> >> I am curious why you are trying PV. >> >> -yoctozepto >> >> On Sat, Sep 19, 2020 at 6:41 PM 9f9dcad3f78905b03201--- via >> CentOS-virt <centos-virt at centos.org> wrote: >> >> All, >> >> Just wanted to check one last time before letting this thread die. >> >> I am curious if anyone has gotten CentOS 8 to work in a PV Xen >> environment. >> >> Thanks. >> >> <9f9dcad3f78905b03201 at bcirpg.com> wrote: >> All, >> >> I have successfully installed CentOS 7 on a PV environment, and have >> been trying to see if I can can get a CentOS 8 install running. >> >> Hardware does not support virtualization extensions, hence the PV >> environment and I cant do HVM for the install then migrate. >> >> My understanding is that PV support is in the kernel, and that the >> distro of Linux shouldn't technically matter. But currently when >> trying to "PXEBoot" using a CentOS 8 kernel and ram image >> I get a near instant crash for an invalid kernel. >> >> I tried to get around the issue by using DOM0 kernel and Ram Disk >> for the install (DOM0 is Debian 10), having the boot progress until >> it reaches the following, looping ISCSI error: >> >> >[ OK ] Reached target Slices. >> > Starting Create Static Device Nodes in /dev... >> >[ OK ] Started iSCSI UserSpace I/O driver. >> >[ OK ] Started Setup Virtual Console. >> > Starting dracut cmdline hook... >> >[ OK ] Started Apply Kernel Variables. >> >[ OK ] Stopped iSCSI UserSpace I/O driver. >> > Starting iSCSI UserSpace I/O driver... >> >> I have also tried the CentOS 7 kernel Ram Disk with the same >> results. >> >> I even tried installing CentOS 7 clean, then upgrading in place (by >> unofficial and unsupported means) and was left with an error that >> pygrub couldnt find the partition with the kernel. >> >> Is this is a bug, or is PV just not supported? Or am I doing >> something wrong? >> >> Config for the install is below: >> >> ># Kernel paths for install >> >#kernel = >> "/var/opt/xen/ISO_Store/Centos8PXEBoot/vmlinuz" >> >kernel = "/vmlinuz" >> >#ramdisk = >> "/var/opt/xen/ISO_Store/Centos8PXEBoot/initrd.img" >> >ramdisk = "/initrd.img" >> >extra="modules=loop,squashfs console=hvc0" >> > >> ># Path to HDD and iso file >> >disk = [ >> > #'file:/vmdisk0,xvda,w' >> > 'format=raw, vdev=xvda, access=w, >> target=/dev/mapper/vg_1-virtualmachine', >> > ] >> > >> >extra="ksdevice= >> inst.repo=https://mirror.jaleco.com/centos/8.2.2004/isos/x86_64/ >> nameserver=1.1.1.1 [1]" >> > >> ># Network configuration >> >vif = ['bridge=xenbr0'] >> > >> >#DomU Settings >> >memory = 3072 >> >name = "centos-8.2" >> >> Thank you to all. >> >> ------------------------- >> >> CentOS-virt mailing list >> CentOS-virt at centos.org >> https://lists.centos.org/mailman/listinfo/centos-virt >> >> ------------------------- >> >> CentOS-virt mailing list >> CentOS-virt at centos.org >> https://lists.centos.org/mailman/listinfo/centos-virt > > ------------------------- > > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt > > -- > Chris Wik > Anu Internet Services > www.cwik.ch [2] | www.anu.net [3] > > Links: > ------ > [1] http://1.1.1.1 > [2] http://www.cwik.ch > [3] http://www.anu.net > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt