Re: [libvirt] [Qemu-devel] qemu leaving unix sockets behind after VM is shut down

On Tue, Apr 01, 2014 at 02:34:58PM -0600, Chris Friesen wrote: > When running qemu with something like this > > -device virtio-serial \ > -chardev socket,path=/tmp/foo,server,nowait,id=foo \ > -device virtserialport,chardev=foo,name=host.port.0 > > the VM starts up as expected and creates a socket at /tmp/foo as expected. > > However, when I shut down the VM the socket at /tmp/foo is left > behind in the filesystem. Basically qemu has "leaked" a file. > > With something like OpenStack where we could be creating/destroying > many VMs this could end up creating a significant number of files in > the specified directory. > > Has any thought been given to either automatically cleaning up the > unix socket in the filesystem when qemu exits, or else supporting > the abstract namespace for unix sockets to allow for automatic > cleanup? Libvirt has a special case for the monitor socket in its qemuProcessStop() function. Are you using the OpenStack libvirt driver? Perhaps QEMU should support cleanup but first I think we should check the situation with libvirt.