Re: [libvirt-users] [Lxc-users] Failed to access console after launching LXC through libvirt

Hey Qiu Yu, I am a beginner to both lxc and openstack swift. Can you please clarify some of my doubts related to openstack swift and lxc? On 8 November 2012 21:39, unicell <unicell(a)gmail.com&gt; wrote: > Hi, > > I'm trying to manage LXC instances through OpenStack, which use libvirt > as a virtualization driver layer. After launching LXC instance, I simply > could not attach to the console. > > virsh # list > Id Name State > ---------------------------------- > 14366 instance-00000078 running > > virsh # console 14366 > Connected to domain instance-00000078 > Escape character is ^] > > > And it keeps stuck here. > > Initially I thought it could be a cgroup device config issue, and tried > to "echo ‘c 5:1 rwm' > >/cgroup/devices/libvirt/lxc/instance-00000078/devices.allow“, to add > /dev/console access right to the container. But it does not work, console > stilll not working. > > Before the cgroup tweaking, devices.list are as follows > > [root@localhost libvirt]# cat > /cgroup/devices/libvirt/lxc/instance-0000007a/devices.list > > c 1:3 rwm > c 1:5 rwm > c 1:7 rwm > c 1:8 rwm > c 1:9 rwm > c 5:0 rwm > c 5:2 rwm > c 136:* rwm > > > I'm not quite sure what kind of issue could possibly cause this console > access issue. Cause I'm now using two different guest OS templates on two > different host OSes. Following are some symptoms I observed. > > > * (g) for container guest OS > * (h) for host OS > * NOTE: Ubuntu guest os are generated by lxc-create -t ubuntu, which is > an Ubuntu 12.04 based lxc template. > CentOS guest os are handcrafted by myself, taking reference > of http://wiki.1tux.org/wiki/Lxc/Installation/Guest/Centos/6 > > 1. Ubuntu (g) launched by lxc-start on Ubuntu 12.04 host, console > works > 2. Ubuntu (g) launched by OpenStack / libvirt on Ubuntu 12.04 host, > console works > 3. Ubuntu (g) launched by OpenStack / libvirt on CentOS 6.3 host, > console NOT works > 4. CentOS (g) launched by lxc-start on Ubuntu 12.04 host, console > works > 5. CentOS (g) launched by OpenStack / libvirt on Ubuntu12.04 host, > console NOT works > 6. CentOS (g) launched by OpenStack / libvirt on CentOS 6.3 host, > console NOT works > > So somehow I feel it could be something related to LXC template rootfs, > but Host OS do make a difference (2 vs. 3). lxc-start / libvirt also makes > a difference (4 vs. 5), but that might be caused by cgroup setting. > > Could someone shed me some clues to further digging this issue? Thanks! > > -- > Qiu Yu > > > ------------------------------------------------------------------------------ > Everyone hates slow websites. So do we. > Make your web apps faster with AppDynamics > Download AppDynamics Lite for free today: > http://p.sf.net/sfu/appdyn_d2d_nov > _______________________________________________ > Lxc-users mailing list > Lxc-users(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/lxc-users > > -- Best Regards, Sujay M Final year B.Tech Computer Engineering NITK Surathkal contact: +918971897571