PROXMOX, HYPERVISOR

How to Fix "Cluster not ready – no quorum? (500)" Error in Proxmox

Cluster not ready - no quorum?

If you encounter the error message “Cluster not ready – no quorum? (500)” in Proxmox, don’t worry! In this blog post, we will walk you through the steps to fix this issue and get your Proxmox cluster back up and running smoothly.

Prerequisites

Before proceeding with the steps to fix the “Cluster not ready – no quorum? (500)” error, make sure you have:

  • Access to the Proxmox server with administrative / root privileges.

Steps to Fix the Error

Follow these steps to resolve the “Cluster not ready – no quorum? (500)” error in Proxmox:

  1. Login to the Proxmox Server: First, log in to the Proxmox server using your credentials.
  2. Check Cluster State: Once logged in, check the state of the Proxmox cluster using the following command: 
    pvecm status
  3. Identify Quorum Activity: Review the output of the pvecm status command. If you find that the Quorum activity is blocked, it’s likely the cause of the error.
  4. Change Votes: To resolve the issue, execute the following command to change the votes from 2 to 1: 
    pvecm expected 1
  5. Verify Changes: After executing the command, re-run pvecm status command to verify that the changes have taken effect, and the Quorum activity is no longer blocked.
  6. Resume VM Management: With the Quorum issue fixed, you should now be able to manage your VMs without encountering the error.

Conclusion

By following these steps, you can fix the “Cluster not ready – no quorum? (500)” error in Proxmox and restore the functionality of your Proxmox cluster. Ensuring that the cluster has a healthy Quorum is essential for maintaining high availability and optimal performance!!!