[libvirt] newer libvirt version issues

[Michal Privoznik]

On 26.11.2013 16:06, Franky Van Liedekerke wrote:
> 
> Hi,
> 
> since we're running more than 20 hosts per KVM server, we needed to
> update libvirt to at least 1.1.2 for virtlockd to be able to cope with
> this (due to an old hardcoded limit that was in there before).
> But where 1.1.0 compiles and runs just fine on a fully-patched CentOS
> 6.4 server, newer version have all kinds of issues:
> 
> Every version of libvirt >= 1.1.2 crashes with a segfault on up-to-date
> CentOS 6.4 servers (see below).
> Also, versions of libvirt >= 1.1.3 need a change in the spec file to be
> able to compile:
> apparently the %doc entries that are different with 1.1.2 prevent
> rpmbuild to succeed on
> CentOS servers. Using the %doc lines as per the 1.1.2 spec file results
> in a working rpmbuild.
> The 1.1.4 version has issues with a symbol not found after compiling and
> letting it run:
> 
> error : virDriverLoadModule:78 : failed to load module
> /usr/lib64/libvirt/connection-driver/libvirt_driver_network.so
> /usr/lib64/libvirt/connection-driver/libvirt_driver_network.so:
> undefined symbol: virNetworkList
> error : virDriverLoadModule:78 : failed to load module
> /usr/lib64/libvirt/connection-driver/libvirt_driver_storage.so
> /usr/lib64/libvirt/connection-driver/libvirt_driver_storage.so:
> undefined symbol: virAsprintf
> error : virDriverLoadModule:78 : failed to load module
> /usr/lib64/libvirt/connection-driver/libvirt_driver_nodedev.so
> /usr/lib64/libvirt/connection-driver/libvirt_driver_nodedev.so:
> undefined symbol: virNodeDeviceList
> 31677: error : virDriverLoadModule:78 : failed to load module
> /usr/lib64/libvirt/connection-driver/libvirt_driver_secret.so
> /usr/lib64/libvirt/connection-driver/libvirt_driver_secret.so: undefined
> symbol: virAsprintf
> 31677: error : virDriverLoadModule:78 : failed to load module
> /usr/lib64/libvirt/connection-driver/libvirt_driver_nwfilter.so
> /usr/lib64/libvirt/connection-driver/libvirt_driver_nwfilter.so:
> undefined symbol: virAsprintf
> 31677: error : virDriverLoadModule:78 : failed to load module
> /usr/lib64/libvirt/connection-driver/libvirt_driver_interface.so
> /usr/lib64/libvirt/connection-driver/libvirt_driver_interface.so:
> undefined symbol: virAsprintf
> 31677: error : virDriverLoadModule:78 : failed to load module
> /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so
> /usr/lib64/libvirt/connection-driver/libvirt_driver_qemu.so: undefined
> symbol: networkAllocateActualDevice
> 31677: error : virDriverLoadModule:78 : failed to load module
> /usr/lib64/libvirt/connection-driver/libvirt_driver_lxc.so
> /usr/lib64/libvirt/connection-driver/libvirt_driver_lxc.so: undefined
> symbol: networkAllocateActualDevice
> 
> And every time libvirt segfaults, there's this in the logs:
> debug : virJSONValueToString:1133 :
> result={"id":"libvirt-6","error":{"class":"CommandNotFound","desc":"The
> command qom-list has not been found","data":{"name":"qom-list"}}}
> debug : virEventPollRunOnce:627 : EVENT_POLL_RUN: nhandles=32 timeout=1684
> 9479: debug : qemuMonitorJSONCheckError:341 : unable to execute QEMU
> command
> {"execute":"qom-list","arguments":{"path":"/"},"id":"libvirt-6"}:
> {"id":"libvirt-6","error":{"class":"CommandNotFound","desc":"The command
> qom-list has not been found","data":{"name":"qom-list"}}}
> 9479: error : qemuMonitorJSONCheckError:352 : internal error: unable to
> execute QEMU command 'qom-list': The command qom-list has not been found
> 
> Any insights on any of these issues?

As Eric said it should all be fixed now. However I'm not sure about the
last one - it wasn't SIGSEGV I was seeing when writing the patch, was
it? Can't recall right now, honestly. Anyway, if you're seeing a
SIGSEGV-ing daemon, is it possible for you to get a stacktrace and share
it with us? Maybe we have more bugs than that one I've fixed :)

Moreover, if you're running libvirt under production you almost
certainly don't want run upstream libvirt there but rather backport the
important patches instead. In this case - backport 9f5b4b1f.

Michal