2015-11-20 18:19 GMT+03:00 Daniel P. Berrange <berrange@xxxxxxxxxx>: > On Fri, Nov 20, 2015 at 04:19:59PM +0300, Boris Savelev wrote: >> Hello! >> >> Try to use libvirt with lxc. >> I use latest centos6 amd64 as a libvirt host (libvirt from xen4 repo) >> libvirt-daemon-1.2.15-3.el6.x86_64 >> In container I also use latest centos6 amd64. Container starts with >> /sbin/init. CentOS 6 came with upstart as default init. >> >> My problem is that I could not shutdown container correctly with libvirt. >> virsh -c lxc:/// shutdown test >> Domain test is being shutdown >> In container I see only: >> "init: Re-executing /sbin/init" >> in syslog messages >> >> Why it is happened? >> lxcDomainShutdownFlags [1] send SIGTERM to initpid. Upstart got it and >> reloaded himself instead shutdown. It's default behavior... [2] >> The question is why libvirt send SIGTERM? As I can see lxc-stop [3] >> send SIGPWR (that works correctly with upstart) and also have ability >> to change default signals. >> >> I can understand that when container start with some script not >> /sbin/init that handle SIGTERM this situation is ok. But then >> container use /sbin/init it is not. > > The choice of signal is essentially abitrary, since there is no > common standard used across different init systems. As such we > chose signal numbers that were useful in the context of containers > running applications (ie containers with an init). We then added > logic to be able to use /dev/initctl to trigger shutdown of init > based containers. This works with sysvinit and with systemd, > and various other init systems, but it seems upstart does not > support this. If there is another mechanism for instructing > upstart to shutdown that we can reliably detect, then we could > use that. > Yes, I agree. In this case signal could be configurable (like in generic lxc). You are right, upstart doesn't support /dev/initctl ( But upstart shutdown correct with SIGPWR (30). -- Boris _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
