Software & AppsOperating SystemLinux

Fixing “libvirt-sock not found” error when setting up KVM on Ubuntu 18.04.1 LTS

Ubuntu 4

In this article, we will discuss how to fix the “libvirt-sock not found” error when setting up Kernel-based Virtual Machine (KVM) on Ubuntu 18.04.1 LTS. This error typically occurs when the libvirtd daemon is not running or the libvirt-daemon-system package is not installed.

Checking the libvirtd Daemon

The libvirtd daemon is a critical component of the libvirt library, which provides a common API for managing virtual machines. If this daemon is not running, you may encounter the “libvirt-sock not found” error.

To check if the libvirtd daemon is running, open the terminal and type the following command:

systemctl status libvirtd

This command uses the systemctl tool to check the status of the libvirtd service. If the daemon is not running, you can start it with:

systemctl start libvirtd

Installing the libvirt-daemon-system Package

If the libvirtd daemon is running but you still encounter the error, it may be because the libvirt-daemon-system package is not installed. This package provides the system-specific parts of the libvirt library.

To install it, use the following command:

sudo apt-get install libvirt-daemon-system

This command uses the apt-get tool with the install option to download and install the libvirt-daemon-system package.

Checking the libvirt-sock File

After installing the package, check if the libvirt-sock file is present in the /var/run/libvirt/ directory:

ls /var/run/libvirt

This command lists the contents of the /var/run/libvirt/ directory. If the libvirt-sock file is still missing, try restarting the libvirtd daemon:

systemctl restart libvirtd

Creating the libvirt-sock File Manually

If the issue persists, you can try creating the libvirt-sock file manually. Run the following commands:

sudo touch /var/run/libvirt/libvirt-sock
sudo chmod 777 /var/run/libvirt/libvirt-sock

The touch command creates a new, empty file, and the chmod command changes the permissions of the file to allow all users to read, write, and execute it.

Creating the libvirt-qemu User

If none of the above solutions work, it may be necessary to create the libvirt-qemu user and add appropriate group membership. This can be done by following the instructions provided in this Debian bug report.

Conclusion

By following these steps, you should be able to resolve the “libvirt-sock not found” error and start KVM properly on Ubuntu 18.04.1 LTS. If you encounter any issues, don’t hesitate to seek help from the Ubuntu community or the libvirt user mailing list.

What is KVM?

KVM stands for Kernel-based Virtual Machine. It is a virtualization infrastructure for the Linux kernel that turns it into a hypervisor, allowing multiple virtual machines to run on a single physical machine.

Why am I getting the “libvirt-sock not found” error?

The "libvirt-sock not found" error typically occurs when the libvirtd daemon is not running or the libvirt-daemon-system package is not installed.

How can I check if the `libvirtd` daemon is running?

Open the terminal and type the command systemctl status libvirtd. This command will show the status of the libvirtd service. If it is not running, you can start it with systemctl start libvirtd.

How can I install the `libvirt-daemon-system` package?

To install the libvirt-daemon-system package, use the command sudo apt-get install libvirt-daemon-system.

What should I do if the `libvirt-sock` file is missing?

If the libvirt-sock file is missing, try restarting the libvirtd daemon with the command systemctl restart libvirtd. If the issue persists, you can try creating the file manually with the commands sudo touch /var/run/libvirt/libvirt-sock and sudo chmod 777 /var/run/libvirt/libvirt-sock.

What can I do if none of the above solutions work?

If none of the above solutions work, it may be necessary to create the libvirt-qemu user and add appropriate group membership. You can follow the instructions provided in this Debian bug report.

Where can I seek help if I encounter any issues?

If you encounter any issues, you can seek help from the Ubuntu community or the libvirt user mailing list. They can provide further assistance and guidance.

Leave a Comment

Your email address will not be published. Required fields are marked *