Is there any possible (not necessary native) ways to get access (e.g., terminal usage is the main purpose for me) to guest OS with *nix using libvirt/LXC(not as libvirt module) capabilities? And I don't mean to use methods like lxc-console commands.

up vote 2 down vote accepted

If the guest is set up with a serial console, you can use virsh console. This works well with kvm, never tried it with LXC though

To access the serial console directly, without libvirt: Add this to the qemu-kvm cmd line

-chardev socket,id=monitor,path=/srv/kvm/${VMNAME}/run/monitor.sock,server,nowait \
-monitor chardev:monitor \
-chardev socket,id=serial0,path=/srv/kvm/${VMNAME}/run/console.sock,server,nowait \
-serial chardev:serial0

I pointed the socket to /srv/kvm/VMNAME/run in this case Then you can use minicom

cd /srv/kvm/VMNAME/run
minicom -D unix\#console.sock

On most distributions, you also need to have console=tty0 console=ttyS0,115200n8 or something similar in the kernel boot line

  • In my question, I mean is there any some other ways to do the same as virsh console? Or it's impossible? – zerospiel Nov 20 '13 at 18:22
  • You can do what libvirt does manually, through the sockets qemu has. But if you are using libvirt already, why bother? – dyasny Nov 20 '13 at 18:30
  • I just need to know all possible ways for my project. Can u link on proper functions, that can do the same as virsh console? – zerospiel Nov 20 '13 at 19:12
  • see the post update – dyasny Nov 20 '13 at 22:50

virsh domdisplay <VM-name> will give you a URL for connecting to a graphical console for a guest, if the guest doesn't have a serial console enabled.

virsh console <VM-name> will connect to the guest's serial console.

If all of this command line crap just annoys you, install the virt-manager GUI and you can point and click your way around managing your guests. (Note that virt-manager cannot yet install LXC guests.)

You could define a private network that is not accessible outside the LXC-server and use that network to access the LXC-guests via SSH (and bind SSH only to that network within the LXC guest).

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