[Bug 1316812] Re: ubuntu qemu-kvm package attempts to start a service and fails

[Andrew Woodward]

** Description changed:

  Iso 172, 180, 183
  
- Ubuntu fails to deploy because qemu-kvm fails to install because its
- init service wont start.
+ Ubuntu (guest) 12.04.04 qemu-kvm fails to install because upstart wont
+ pass.
+ 
+ root at node-2:~# apt-get install -f
+ Reading package lists... Done
+ Building dependency tree       
+ Reading state information... Done
+ 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
+ 3 not fully installed or removed.
+ After this operation, 0 B of additional disk space will be used.
+ Setting up qemu-kvm (1.2.0+noroms-0ubuntu7.12.10) ...
+ start: Job failed to start
+ invoke-rc.d: initscript qemu-kvm, action "start" failed.
+ dpkg: error processing qemu-kvm (--configure):
+  subprocess installed post-installation script returned error exit status 1
+ 
+ expected result: qemu-kvm should install and "start" anyways even if
+ acceleration can't be loaded.
+ 
+ grep "^flags.* svm" /proc/cpuinfo
+ flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt pdpe1gb lm 3dnowext 3dnow rep_good nopl extd_apicid pni cx16 popcnt hypervisor cmp_legacy svm cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw
+ 
+ root at node-1:/etc/init# modprobe kvm
+ root at node-1:/etc/init# modprobe kvm_amd
+ FATAL: Error inserting kvm_amd (/lib/modules/3.11.0-18-generic/kernel/arch/x86/kvm/kvm-amd.ko): Operation not supported
+ root at node-1:/etc/init# ls -l /dev/kvm
+ ls: cannot access /dev/kvm: No such file or directory
+ 
+ dmesg:
+ [10925.939670] has_svm: can't execute cpuid_8000000a
+ [10925.939677] kvm: no hardware support
+ 
  
  init fails due to
  cat /etc/init/qemu-kvm.conf
  ...
  pre-start script
          # Silently exit if the package isn't installed anymore
          if [ ! -e /usr/bin/kvm ]; then
                  exit 0
          fi
          [ -r /etc/default/qemu-kvm ] && . /etc/default/qemu-kvm
          # Load the appropriate module, respecting blacklists
          if grep -qs "^flags.* vmx" /proc/cpuinfo; then
                  modprobe -b kvm_intel "$KVM_NESTED" || true
                  chown root:kvm /dev/kvm
                  chmod 0660 /dev/kvm
          elif grep -qs "^flags.* svm" /proc/cpuinfo; then
                  modprobe -b kvm_amd || true
                  chown root:kvm /dev/kvm
                  chmod 0660 /dev/kvm
          fi
-  ...
+ ...
  
- On guests that have parent hosts that support kvm_nested
- /proc/cpuinfo will contain 'svm' or 'vmx' however because we are already a guest, /dev/kvm might not create, running modprobe on kvm_amd or kvm_intel will fail, then chmod will fail because /dev/kvm still doesn't exist. This causes init to fail
+ It appears that guest might have been passed bad CPU flags and qemu-kvm
+ in host might not be allowing kvm acceleration to load. It appears that
+ similar results have been noted in Debian upstream, where they are
+ testing for -e /dev/kvm before attempting to load more acceleration
  
- root at node-1:/etc/init# modprobe kvm
- root at node-1:/etc/init# modprobe kvm_amd
- FATAL: Error inserting kvm_amd (/lib/modules/3.11.0-18-generic/kernel/arch/x86/kvm/kvm-amd.ko): Operation not supported
- root at node-1:/etc/init# ls -l /dev/kvm
- ls: cannot access /dev/kvm: No such file or directory
- 
- we should probably change the first test from /usr/bin/kvm to /dev/kvm
- like in Debian SID
+ in Debian SID
  
  case "$1" in
      start|restart|force-reload)
  
          [ ! -e /dev/kvm ] || exit 0     # nothing to do

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https://bugs.launchpad.net/bugs/1316812

Title:
  ubuntu qemu-kvm package attempts to start a service and fails

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