Regarding this being a bug in lxc as well, the failure to write under
/sys is deliberately enforced by the apparmor policy. It can be worked
around by using another apparmor profile (or none, as commented in the
configuration file), but is not recommended - containers should not
change kernel settings.
** Also affects: qemu-kvm (Ubuntu Precise)
Importance: Undecided
Status: New
** Also affects: qemu-kvm (Ubuntu Quantal)
Importance: Undecided
Status: New
** Description changed:
The KSM_ENABLED setting (on by default) for the qemu-kvm job fails under
lxc but the kernel files still appear writable. Thats likely an lxc bug
(either in defaults or device mapping), but there is no need for qemu-
kvm's job to fail if those settings can't be written to IMNSHO.
+
+ ================================
+ SRU Justification:
+ 1. Impact: qemu-kvm cannot be installed in containers
+ 2. Development fix: ignore errors writing under /sys in upstart job
+ 3. Stable fix: same as development fix
+ 4. Test case:
+ sudo lxc-create -t ubuntu -n c1 -- -r [precise|quantal]
+ sudo lxc-start -n c1
+ # log into c1 as ubuntu/ubuntu, and 'sudo apt-get install qemu-kvm'
+ 5. Regression potential: legitimate errors writing under /sys (kernel bugs)
+ will be ignored.
+ ================================
** Changed in: qemu-kvm (Ubuntu Precise)
Status: New => Triaged
** Changed in: qemu-kvm (Ubuntu Quantal)
Status: New => Triaged
** Changed in: qemu-kvm (Ubuntu Precise)
Importance: Undecided => Medium
** Changed in: qemu-kvm (Ubuntu Quantal)
Importance: Undecided => Medium
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https://bugs.launchpad.net/bugs/1078530
Title:
upstart job fails to start under lxc
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