Virsh console hangs whenever I connect to Virtual Machine

kvm-virtualizationvirsh

Whenever I try to connect to VM using virsh console <vm name> my screen hangs and displays:

Connected to domain <vm name>
Escape character is ^]

I have found many solutions on the internet but nothing has worked for me and I am even not able to find the /etc/init directory as CentOS 7 has a different directory structure.

I need /etc/init directory to create a script which I found on the internet as a solution.

I am using only ssh connection and no GUI and I do not have any access to the physical machine.

Best Answer

Edit “/etc/sysconfig/grub” Add to end of GRUB_CMD_LINELINUX, “console=ttyS0”

example:

GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap crashkernel=auto rhgb quiet console=ttyS0"

Run the following commands as root:

stty -F /dev/ttyS0 speed 9600

grub2-mkconfig -o /boot/grub2/grub.cfg

systemctl start getty@ttyS0

Reboot the VM.

Try to run virsh console VMNAME

Related Solutions

Centos – qemu-kvm/virsh: No network connectivity whilst using bridged networking

The answer to this issue was that because I'd done a non-graphic install of Centos 6 minimal on the guests, the network interfaces had not been automatically set up to work. My lack of knowledge of virtualisation and Centos meant that I assumed that this would be taken care of for me, but I was incorrect in this assumption.

Fix: I needed to go into ifcfg-eth0 on the guests and turn on ONBOOT=yes and BOOTPROTO=dhcp, then restart the network adapter via ifdown eth0 then ifup eth0. After doing this, the guests received IP addresses and everything worked as expected.

Ubuntu – KVM on Ubuntu: console connection displays nothing

You definitely need to enable the serial console in the guest machine before being able to connect. The correct way is described here: https://help.ubuntu.com/community/SerialConsoleHowto

Recent Ubuntu versions use Upstart tasks and services so you should add an Upstart task as /etc/init/ttyS0.conf, containing the following:

# ttyS0 - getty
#
# This service maintains a getty on ttyS0 from the point the system is
# started until it is shut down again.

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

respawn
exec /sbin/getty -L 115200 ttyS0 vt102

Start it this way:

$ sudo start ttyS0

After that you should be able to connect to the serial console from the host. Don't forget to press Enter once connected.

Best Answer

Related Solutions

Centos – qemu-kvm/virsh: No network connectivity whilst using bridged networking

Ubuntu – KVM on Ubuntu: console connection displays nothing

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