KVM host : Fedora 16
VM : Fedora 16 ( boot loader is grub2 not grub )
[ add a serial port to the VM ]
assume that the Fedora VM has a serial port.
you can check whether or not your VM has a serial port as below:
- on the KVM host
| # virsh ttyconsole f16-vm1 /dev/pts/2 |
or
| # virsh dumpxml f16-vm1 | grep serial <controller type='virtio-serial' index='0'> <alias name='virtio-serial0'/> <serial type='pty'> <alias name='serial0'/> </serial> <target type='serial' port='0'/> <alias name='serial0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> |
[ configure a serial port on the VM ( not the KVM host ) ]
- on the VM
add the red lines
| [root@localhost ~]# cat /etc/default/grub GRUB_CMDLINE_LINUX="quiet rhgb biosdevname=0" GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,9600n8" GRUB_TERMINAL=serial GRUB_SERIAL_COMMAND="serial --speed=9600 --unit=0 --word=8 --parity=no --stop=1" |
add the following line in /etc/inittab
| [root@localhost ~]# tail -1 /etc/inittab S0:12345:respawn:/sbin/agetty ttyS0 115200 |
add the following line in /etc/securetty file.
| [root@localhost ~]# echo "ttyS0" >> /etc/securetty |
update grub.cfg
| [root@localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.3.5-2.fc16.x86_64 Found initrd image: /boot/initramfs-3.3.5-2.fc16.x86_64.img done |
| [root@localhost ~]# egrep -v ^# /boot/grub2/grub.cfg if [ -s $prefix/grubenv ]; then load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } serial --speed=9600 --unit=0 --word=8 --parity=no --stop=1 terminal_input serial terminal_output serial set timeout=5 menuentry 'Linux, with Linux 3.3.5-2.fc16.x86_64' --class gnu-linux --class gnu --class os { load_video set gfxpayload=keep insmod gzio insmod part_gpt insmod ext2 set root='(/dev/vda,gpt2)' search --no-floppy --fs-uuid --set=root ecdb7a66-7b00-49b9-b507-82e346d4c549 echo 'Loading Linux 3.3.5-2.fc16.x86_64 ...' linux /boot/vmlinuz-3.3.5-2.fc16.x86_64 root=UUID=ecdb7a66-7b00-49b9-b507-82e346d4c549 ro quiet rhgb biosdevname=0 console=tty0 console=ttyS0,9600n8 echo 'Loading initial ramdisk ...' initrd /boot/initramfs-3.3.5-2.fc16.x86_64.img } |
reboot the VM
[ connect to the VM from KVM host with virsh console ]
on the KVM host
| [root@fc16 ~]# virsh list --all Id Name State ---------------------------------- 1 f16-vm1 running [root@fc16 ~]# virsh console f16-vm1 Connected to domain f16-vm1 Escape character is ^] Password: Login incorrect login: root Password: Last login: Wed May 16 12:02:07 from 192.168.122.1 Appliance: jeos-f16 appliance 1.0 Hostname: localhost IP Address: 192.168.122.124 [root@localhost ~]# |
[ connect to the VM from the KVM host with minicom ]
You can also connect to the VM with minicom.
on the KVM hsot
install minicom
| [root@fc16 ~]# yum install -y minicom |
check a serial port number of the VM to which you want to connect.
| [root@fc16 ~]# virsh ttyconsole f16-vm1 /dev/pts/2 |
connect to the VM with minicom
| [root@fc16 ~]# minicom -op /dev/pts/2 Welcome to minicom 2.5 OPTIONS: I18n Compiled on Apr 6 2011, 07:59:07. Port /dev/modem Press CTRL-A Z for help on special keys Fedora release 16 (Verne) Kernel 3.3.5-2.fc16.x86_64 on an x86_64 (ttyS0) login: root Password: Last login: Wed May 16 12:34:59 on ttyS0 Appliance: jeos-f16 appliance 1.0 Hostname: localhost IP Address: 192.168.122.124 [root@localhost ~]# |
when exiting the VM , press Ctrl A and then press x