Hey Nguyen, I'm sorry to hear that you are stuck with your OpenStack cluster. It seems that you are getting a 404 Client Error when trying to create a cluster using the magnum API. This could be due to several reasons, such as: - The cluster template ID that you are using is not valid or does not exist. You can check the list of available cluster templates by running “openstack coe cluster“ template list - The image ID that you are using is not compatible with the COE that you have selected. You can check the supported COEs and images by running “openstack coe list” - The network driver or volume driver that you are using is not supported by the COE or the image. You can check the supported drivers and options by running “openstack coe driver list” and “openstack image show <image-id>” - The security group or firewall rules that you have configured on your OpenStack instance or network are blocking the access to the magnum API endpoint. You can check the security group settings by running “openstack security group show <security-group-id>” and “openstack firewall show <firewall-id>” To troubleshoot your issue, I suggest that you try the following steps below: - Verify that your cluster template ID, image ID, network driver, volume driver, and security group settings are correct and match your requirements. - Restart your OpenStack instance and/or network to apply any changes. - Run “openstack coe cluster show <cluster-id>” to see if your cluster is in a valid state. - Run “kubectl version --certificate-authority=ca.pem \\ --client-key=key.pem \\ --client-certificate=cert.pem -s <kubernetes-url>” to see if your Kubernetes client can connect to your cluster. - If none of these steps resolve your issue, you may need to contact OpenStack support if you have a Premium License instead of Commercial one :) I hope this helps you fix your problem. Please let me know if you have any other questions or feedback. 😊 Best, Kerem Çeliker Head of Cloud Architecture tr.linkedin.com/in/keremceliker