On Tue, Jan 20, 2015 at 2:35 PM, Johnny Hughes <johnny@xxxxxxxxxx> wrote: > On 01/20/2015 08:10 AM, Pasi Kärkkäinen wrote: >> Hello, >> >> Now that the Xen 4.4.1 rpms + libvirt 1.2.10 rpms for CentOS 6 seem to be in good shape >> it would be a good time to start experimenting with el7 builds aswell. >> >> I think it's best to start with the same set of packages we have for el6, >> and just do the minimum required changes to get them working on centos7. >> >> That probably means fixing some dependencies in the spec file, and some changes for systemd support. >> >> Note that all those changes are already done in Fedora 21 Xen rpms, for example: >> ftp://ftp.funet.fi/pub/mirrors/fedora.redhat.com/pub/fedora/linux/updates/21/SRPMS/x/xen-4.4.1-12.fc21.src.rpm >> >> A few months ago I also saw a Xen 4.4 el7 rpms port, so we could find those src.rpms aswell. >> > > Agreed on this too .. let's use as much the same as we can, and we can > use %if statements in the SPEC to differentiate el6 and el7 things, if > necessary. systemd versus init and maybe some version number changes > for buildrequires should be the changes we need to be concerned about. > >> >> And then there's the dom0 kernel.. Stock rhel7/centos7 is based on Linux 3.10 kernel, >> so we probably can use the exact same 3.10.63 kernel we have today for CentOS 6 Xen. > > I agree that we can likely use the current centos-6 kernel. We do need > to decide when we want to shift the kernel to 3.14 .. the support for > 3.10 as a LTS kernel ends in September 2015 (so 9 months). I intend to do this as soon as I have time; but ATM I've got probably less than one day a week to devote to it, so it may be slow. > https://www.kernel.org/category/releases.html > > We can try to take the RH 3.10 el7 kernel, mod it for xen, and use it .. > or we can shift to 3.14.x and that buys us at least one more year .. or > wait until they name the next LTS kernel and go for that. Likely the > next LTS kernel will be the easiest option (the RH modified kernel will > not support xen and rolling in stuff externally will be hard because of > the backports RH does to the kernel (things that go into a standard > kernel will not apply cleanly to the RH kernel). Sticking with the stable upstream kernels would allow us to easily get fixes and updates to Xen-specific issues, rather than having to manually port them over. -George _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos-virt
