I'm trying to figure out how to replace the vmlinuz and initrd.img from CentOS 7.4 with "fixed" kernel-plus versions in order create CentOS 7.4 VM's. So far I'm stuck booting via 7.3 install, adding new kernel-plus and upgrading to 7.4. I've not found any complete Google answers and was looking for help making sure I choose the correct approach. I've tried to build an initrd.img from a kernel-plus booting system via "mkinitrd -f -v /boot/initrd.img $(uname -r)", but the file size is less than half the one from CentOS 7.4 (17MB -vs- 47MB). I'm not even sure I can just replace those files yet either. Any help going the correct path? Thanks PJ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20171010/f0a21ca3/attachment.html>
On 10/10/2017 01:46 PM, PJ Welsh wrote:> I'm trying to figure out how to replace the vmlinuz and initrd.img from > CentOS 7.4 with "fixed" kernel-plus versions in order create CentOS 7.4 > VM's. So far I'm stuck booting via 7.3 install, adding new kernel-plus > and upgrading to 7.4. I've not found any complete Google answers and was > looking for help making sure I choose the correct approach. > > I've tried to build an initrd.img from a kernel-plus booting system via > "mkinitrd -f -v /boot/initrd.img $(uname -r)", but the file size is less > than half the one from CentOS 7.4 (17MB -vs- 47MB). I'm not even sure I > can just replace those files yet either. > > Any help going the correct path?I have not had time to do this yet .. BUT .. you can edit the lorax template to to use kernel-plus instead of kernel (and new repodata).. then rerun lorax to get a bootable tree and boot.iso You would then need a tree with the new kernel-plus* packages instead of the kernel-* packages This bug kind of explains the process: https://bugs.centos.org/view.php?id=13763 (look for lorax in the bug) I do want to create a process and tree somewhere for this (likely on buildlogs.centos.org). Sometime soon after I finish the i386 distro release (hopefully that is this week .. next week for some kind of bootable x86_64 Xen PV solution). The good news is, the 7.5 RHEL kernel Source RPMs should have Kevin's patch in it and it should work as released on Xen PV. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 198 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20171010/c7295030/attachment.sig>
Thanks! I starting the process now. I'll let you know how it goes. pjwelsh On Tue, Oct 10, 2017 at 2:32 PM, Johnny Hughes <johnny at centos.org> wrote:> On 10/10/2017 01:46 PM, PJ Welsh wrote: > > I'm trying to figure out how to replace the vmlinuz and initrd.img from > > CentOS 7.4 with "fixed" kernel-plus versions in order create CentOS 7.4 > > VM's. So far I'm stuck booting via 7.3 install, adding new kernel-plus > > and upgrading to 7.4. I've not found any complete Google answers and was > > looking for help making sure I choose the correct approach. > > > > I've tried to build an initrd.img from a kernel-plus booting system via > > "mkinitrd -f -v /boot/initrd.img $(uname -r)", but the file size is less > > than half the one from CentOS 7.4 (17MB -vs- 47MB). I'm not even sure I > > can just replace those files yet either. > > > > Any help going the correct path? > > I have not had time to do this yet .. BUT .. you can edit the lorax > template to to use kernel-plus instead of kernel (and new repodata).. > then rerun lorax to get a bootable tree and boot.iso > > You would then need a tree with the new kernel-plus* packages instead of > the kernel-* packages > > This bug kind of explains the process: > > https://bugs.centos.org/view.php?id=13763 > > (look for lorax in the bug) > > I do want to create a process and tree somewhere for this (likely on > buildlogs.centos.org). Sometime soon after I finish the i386 distro > release (hopefully that is this week .. next week for some kind of > bootable x86_64 Xen PV solution). > > The good news is, the 7.5 RHEL kernel Source RPMs should have Kevin's > patch in it and it should work as released on Xen PV. > > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20171011/3b3343c5/attachment-0002.html>
On Tue, Oct 10, 2017 at 2:32 PM, Johnny Hughes <johnny at centos.org> wrote:> On 10/10/2017 01:46 PM, PJ Welsh wrote: > > I'm trying to figure out how to replace the vmlinuz and initrd.img from > > CentOS 7.4 with "fixed" kernel-plus versions in order create CentOS 7.4 > > VM's. So far I'm stuck booting via 7.3 install, adding new kernel-plus > > and upgrading to 7.4. I've not found any complete Google answers and was > > looking for help making sure I choose the correct approach. > > > > I've tried to build an initrd.img from a kernel-plus booting system via > > "mkinitrd -f -v /boot/initrd.img $(uname -r)", but the file size is less > > than half the one from CentOS 7.4 (17MB -vs- 47MB). I'm not even sure I > > can just replace those files yet either. > > > > Any help going the correct path? > > I have not had time to do this yet .. BUT .. you can edit the lorax > template to to use kernel-plus instead of kernel (and new repodata).. > then rerun lorax to get a bootable tree and boot.iso > > You would then need a tree with the new kernel-plus* packages instead of > the kernel-* packages > > This bug kind of explains the process: > > https://bugs.centos.org/view.php?id=13763 > > (look for lorax in the bug) > > I do want to create a process and tree somewhere for this (likely on > buildlogs.centos.org). Sometime soon after I finish the i386 distro > release (hopefully that is this week .. next week for some kind of > bootable x86_64 Xen PV solution). > > The good news is, the 7.5 RHEL kernel Source RPMs should have Kevin's > patch in it and it should work as released on Xen PV. > > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt > >I can report full success based on your information! Thank you! For anyone interested, the general steps I choose for the test was: * On a build system: yum install lorax #if not already there Edit /usr/share/lorax/runtime-install.tmpl and change the "installpkg kernel" to "installpkg kernel-plus". DEFAULTKERNEL=kernel-plus lorax -p Centos-Minimal -v 7 -r 7.4 -s http://mirrors.us.kernel.org/centos/7/os/x86_64/ -s http://mirrors.us.kernel.org/centos/7/updates/x86_64/ -s http://mirrors.us.kernel.org/centos/7/centosplus/x86_64/ ./results/ rsync -a ~/results/ PXEINSTALL.SERVER:/YOUR/DIR/os/x86_64/ #location of CentOS 7.4 original install was located rsync -a results/images/pxeboot/{vmlinuz,initrd.img} PXEINSTALL.SERVER:/var/lib/tftpboot/linux-install/YOUR/DIR/ * Kickstart created with required package "kernel-plus" and "repo --name=centosplus --baseurl=http://CHOOSE/A/MIRROR/7/centosplus/x86_64/" as additions original kickstart * On xen server you can now run virt-install with kshttp://PXEINSTALL.SERVER/PATH/TO/kickstart.cfg" Thanks pjwelsh -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20171011/04c7fd40/attachment-0002.html>
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