I've also had a few Xen systems grub entry issues. I'm not yet sure what triggers the events, but I do think there *may* be a correlation to the "/boot" part. I've found the Xen servers that have "/boot" before any of the the lines like "/boot/xen.gz" ended up missing complete grub entries. Not sure it's 100% true. Anyone else comment? Thanks PJ On Sun, Dec 20, 2015 at 5:31 AM, Phill Bandelow <phill at onapp.com> wrote: > HI, > > We've started to see several issues with the Xen releases. Going back to > basics I've used this guide > https://wiki.centos.org/HowTos/Xen/Xen4QuickStart > > Once the install process is complete the grub.conf looks like this: > > default=0 > timeout=5 > splashimage=(hd0,0)/boot/grub/splash.xpm.gz > hiddenmenu > title CentOS (3.18.21-17.el6.x86_64) > root (hd0,0) > kernel /boot/xen.gz dom0_mem=1024M,max:1024M cpuinfo > com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all > module /boot/vmlinuz-3.18.21-17.el6.x86_64 ro root=/dev/vda1 > rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 > crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet > title CentOS (2.6.32-573.12.1.el6.x86_64) > root (hd0,0) > kernel /boot/vmlinuz-2.6.32-573.12.1.el6.x86_64 ro root=/dev/vda1 > rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 > crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet > initrd /boot/initramfs-2.6.32-573.12.1.el6.x86_64.img > title CentOS (2.6.32-358.el6.x86_64) > root (hd0,0) > kernel /boot/vmlinuz-2.6.32-358.el6.x86_64 ro > root=UUID=71b203ab-36ea-4aa8-9ba3-78e4109f0ca4 rd_NO_LUKS rd_NO_LVM > LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto > KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet > initrd /boot/initramfs-2.6.32-358.el6.x86_64.img > > As you can see the missing module line. If i manually run grub-bootxen.sh > nothing changes. > > Manually adding the missing module entry: > > module /boot/initramfs-3.18.21-17.el6.x86_64.img > > Causes the following: > > > https://www.dropbox.com/s/ley5nj29ubwqogc/Screenshot%202015-12-20%2011.10.11.png?dl=0 > > Disabling APIC gives the following console output: > > > https://www.dropbox.com/s/a6zgioxl9xpg20y/Screenshot%202015-12-20%2011.15.29.png?dl=0 > > Now i know this is inside a KVM virtual machine, however we are starting > to see this issue on at least 7 standard dedicated servers. > > [root at test ~]# rpm -qa | grep xen > xen-libs-4.4.3-9.el6.x86_64 > xen-hypervisor-4.4.3-9.el6.x86_64 > xen-4.4.3-9.el6.x86_64 > centos-release-xen-7-11.el6.x86_64 > xen-licenses-4.4.3-9.el6.x86_64 > xen-runtime-4.4.3-9.el6.x86_64 > > [root at test ~]# cat /etc/redhat-release > CentOS release 6.7 (Final) > [root at test ~]# > > [root at test ~]# cat /proc/cpuinfo > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 23 > model name : Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz > stepping : 10 > microcode : 1 > cpu MHz : 2666.352 > cache size : 4096 KB > physical id : 0 > siblings : 1 > core id : 0 > cpu cores : 1 > apicid : 0 > initial apicid : 0 > fpu : yes > fpu_exception : yes > cpuid level : 13 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca > cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx lm constant_tsc > arch_perfmon unfair_spinlock pni ssse3 cx16 sse4_1 x2apic xsave hypervisor > lahf_lm > bogomips : 5332.70 > > -- > Regards, > Phill > > _______________________________________________ > 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/20151220/1b297409/attachment-0006.html>
