Linux KVM : connect to a Linux Mint12 VM via virsh console

small tips

how to use virsh console.

KVM host : Ubuntu 11.10

VM : Linux Mint 12

[ on the KVM host (Ubuntu 11.10 ) ]

confirm the VM has serial ports.

# virsh dumpxml Mint12-64-1 | less    <serial type='pty'>      <source path='/dev/pts/5'/>      <target port='0'/>      <alias name='serial0'/>    </serial>    <console type='pty' tty='/dev/pts/5'>      <source path='/dev/pts/5'/>      <target type='serial' port='0'/>      <alias name='serial0'/>

[ on the VM ( Linux Mint 12 ) ]

make /etc/init/ttyS0.conf file

# cat /etc/init/ttyS0.conf start on stopped rc RUNLEVEL=[2345] stop on runlevel [!2345] respawn exec /sbin/getty -L 115200 ttyS0 vt 102

“start ttyS0”

# start ttyS0 ttyS0 start/running, process 703

edit /boot/grub/grub.cfg

By default , grub.cfg is read-only permission.

add write permission.

# chmod u+w /boot/grub/grub.cfg

edit grub.cfg ( add red lines )

menuentry 'Linux Mint 12 64-bit, 3.0.0-16-generic (/dev/vda1)' --class linuxmint --class gnu-linux --class gnu --class os {        recordfail        set gfxpayload=$linux_gfx_mode        insmod gzio        insmod part_msdos        insmod ext2        set root='(hd0,msdos1)'        search --no-floppy --fs-uuid --set=root e1679c23-ba3c-4d9f-9d02-b2a3d69b 5af4        linux   /boot/vmlinuz-3.0.0-16-generic root=UUID=e1679c23-ba3c-4d9f-9d02 -b2a3d69b5af4 ro   quiet splash vt.handoff=7 console=ttyS0,115200n8        initrd  /boot/initrd.img-3.0.0-16-generic

reboot the VM.

connect to the VM via virsh console

virsh # console Mint12-64-1 Connected to domain Mint12-64-1 エスケープ文字は  ^] です