Hardware⏱️ 3 min read📅 2026-06-19

How to Fix: nova-compute libvirt x86_64 emulator Error

Nova-compute libvirt x86_64 emulator error in Ubuntu 12.04 server

Quick Answer: Check the libvirt_type parameter in nova-compute.conf and ensure it is set to 'qemu' instead of 'kvm'. This should resolve the issue.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🚀 How to Resolve This Issue
  3. 🎯 Final Words

The nova-compute service is experiencing an error due to a libvirt x86_64 emulator issue, which affects the installation of OpenStack on Ubuntu 12.04 server.

This error can be frustrating for system administrators as it prevents the Nova-compute service from starting and can impact overall system performance.

⚠️ Common Causes

  • The primary reason for this error is a mismatch between the libvirt version used by QEMU/KVM and the version specified in the nova-compute.conf file. This mismatch can cause issues with the emulator's functionality.
  • An alternative reason could be an issue with the kernel or hardware configuration, which may prevent QEMU/KVM from functioning correctly.

🚀 How to Resolve This Issue

Updating libvirt to match the specified version

  1. Step 1: Update the libvirt package to the latest version using the following command: `sudo apt-get update && sudo apt-get install libvirt-bin`
  2. Step 2: Verify that the updated libvirt package is installed by running `dpkg --get-selections | grep libvirt`
  3. Step 3: Restart the QEMU/KVM service to ensure the changes take effect: `sudo service qemu-kvm restart`

Modifying the nova-compute.conf file

  1. Step 1: Modify the libvirt_type parameter in the /etc/nova/compute.conf file to match the QEMU/KVM version installed on the system: `sudo nano /etc/nova/compute.conf`
  2. Step 2: Update the libvirt_type parameter to 'qemu' instead of 'kvm': `libvirt_type = qemu`

🎯 Final Words

By following these steps, you should be able to resolve the nova-compute error caused by the libvirt x86_64 emulator issue. If you continue to experience issues, further troubleshooting may be necessary.

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