On Mon, Dec 07, 2009 at 03:02:53AM -0600, Tony Risinger wrote: > hello, > > i am trying to use libvirt with LXC, and having some issues... > everything seems ok when using lxc-* tools. host box is Arch Linux. > ultimately i'm getting this error in the domain log: > > ..... > 05:45:31.353: debug : lxcControllerMain:380 : EPOLLHUP from fd 7 > > i was getting this last night in #virt: > > ..... > 20:49:57.545: error : lxcFdForward:230 : read of fd 7 failed: Input/output error > libvir: Linux Container error : read of fd 7 failed: Input/output error I believe this essentially says that the container has shutdown. > -----CONFIGURATION > > # host ptmx symlinked to pts/ptmx > [root@PHS-001 vps]# ls -l /dev/ptmx > lrwxrwxrwx 1 root root 8 2009-12-08 04:40 /dev/ptmx -> pts/ptmx > > # guest ptmx symlinked to pts/ptmx > [root@PHS-001 vps]# ls -l /vps/dom/ubuntu/root/dev/ptmx > lrwxrwxrwx 1 root root 8 2009-12-06 04:11 > /vps/dom/ubuntu/root/dev/ptmx -> pts/ptmx Avoid doing this - libvirt will set that up as part of the container bootstrapping processs. > # guest config... > # i have tried the legacy <console type='pty' /> with same results > # i dont fully understand this, why do i need to specify a host/source pty? > [root@PHS-001 vps]# cat /vps/def/exec/sys/ubuntu.xml > <domain type='lxc'> > <name>ubuntu</name> > <memory>500000</memory> > <os> > <type arch='i686'>exe</type> > <init>/sbin/init</init> > </os> > <clock offset='utc'/> > <on_poweroff>destroy</on_poweroff> > <on_reboot>restart</on_reboot> > <on_crash>destroy</on_crash> > <devices> > <filesystem type='mount'> > <source dir='/vps/dom/ubuntu/root'/> > <target dir='/'/> > </filesystem> > <console type='pty'> > <source path='/dev/pts/4'/> Leave out the <source> here - that's auto-generated when the container starts > <target port='0'/> > </console> > </devices> > </domain> > > -----PROCEDURE > > [root@PHS-001 vps]# LIBVIRT_DEBUG=1 libvirtd --daemon > 05:42:46.121: debug : virInitialize:278 : register drivers > ..... > > [root@PHS-001 vps]# virsh -c lxc:/// define /vps/def/exec/sys/ubuntu.xml > Domain ubuntu defined from /vps/def/exec/sys/ubuntu.xml > > [root@PHS-001 vps]# virsh -c lxc:/// define /vps/def/exec/sys/ubuntu.xml > Domain ubuntu defined from /vps/def/exec/sys/ubuntu.xml > > [root@PHS-001 vps]# virsh -c lxc:/// start ubuntu > Domain ubuntu started > > [root@PHS-001 vps]# virsh -c lxc:/// console ubuntu > error: Unable to get domain status > error: internal error Unable to get cgroup for ubuntu > > -----LOGS > > # /var/log/libvirt/lxc/ubuntu.log > 05:45:31.126: debug : virCgroupMakeGroup:450 : Make group /libvirt/lxc > 05:45:31.126: debug : virCgroupMakeGroup:462 : Make controller > /cgroup/1534/libvirt/lxc/ > 05:45:31.211: debug : lxcContainerStart:832 : clone() returned, 1536 > 05:45:31.353: debug : lxcControllerMain:380 : EPOLLHUP from fd 7 > > i've tried endless variations of the <devices> section, but i just > cant seem to get anything going with libvirt/LXC once i move the root > to a new location for a system container. same container works fine > with lxc-* tools (although i manually make a bridge). any help is > appreciated, Rather that going straight for a full OS, try just setting up a trivial busybox root environment which just takes you intoa busybox shell. eg, in /sbin/init just have #!/sbin/busybox sh (Obviously install busybox in /sbin inside the root env too :-) Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :| -- Libvir-list mailing list Libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list