virsh console hangs at the escape character “^]”

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I am trying to kickstart a newly built VM. I am stuck with the following. Want to start with a console so that I can include username and other info for this VM:

   @vmhost02 ~]$ sudo virsh start --console testengine
   Domain testengine started
   Connected to domain testengine
   Escape character is ^]

It hangs up in there and doesn‘t listen to any keys except "^]"

1)

You can try to edit /etc/default/grub in the guest, and make sure you have:

GRUB_TERMINAL=serial
GRUB_SERIAL_COMMAND="serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1"

Then execute:

# update-grub
# reboot

2)

If that does not work, try to replace quiet with console=ttyS0 in GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub:

GRUB_CMDLINE_LINUX_DEFAULT="... console=ttyS0"

Then again:

# update-grub
# reboot

3)

You may still need to try:

# systemctl enable serial-getty@ttyS0.service
# systemctl start serial-getty@ttyS0.service
# reboot

4)

You would need to define a tty to be used as a virtual console. In case you have access to your vm either using vnc or ssh create the following file

vi /etc/init/ttyS0.conf

The content should be something like

start on stopped rc RUNLEVEL=[2345]
stop on runlevel [!2345]

respawn
exec /sbin/getty -L 38400 ttyS0 vt102  # This is your term type vt102

Save these settings and subsequently from your host machine

 virsh destroy [vm-name]; service libvirtd stop; service libvirtd start; virsh start [vm-name]

I‘m doing here a stop/start of libvirt, because it sometimes tend to not send a SIGTERM to libvirt.

Finally try

virsh console [vm-name]

5)

May be simpler than the solution of val0x00ff, you shall add the console=ttyS0 at the end of the kernel lines in the /boot/grub2/grub.cfg file of the VM (this is not done by default it seems):

   (vm)$> grubby --update-kernel=ALL --args="console=ttyS0"
   (vm)$> reboot

Then virsh console shall work as expected

6) 

The virsh console command connects you to the virtual serial port in the guest. If you see nothing on this console this indicates that the guest OS has not setup anything on the serial port. Typically in Linux you‘d want to make it run an ‘agetty‘ process on the serial port. If you want to see kernel boot messages on this serial console you also need to edit the guest boot loader to add console=tty0 console=ttyS0 to the kernel command line - this should get boot messages on both the serial and graphical consoles.

7)

systemctl enable getty@tty1.service

grubby --update-kernel=ALL --args="console=ttyS0"

grub2-mkconfig -o /boot/grub2/grub.cfg
GRUB_TERMINAL=serial
GRUB_SERIAL_COMMAND="serial –speed115200 –unit=0 –word=8 –parity=no –stop=1"

virsh console hangs at the escape character “^]”

标签：username   cap   something   bec   cape   hat   pre   selected   vmhost   

原文地址：https://www.cnblogs.com/saryli/p/11828038.html