Simple definition
A Proxmox cluster brings together several nodes to centralize management, quorum and high availability.
Technical definition
A Proxmox cluster brings together several nodes to centralize management, quorum In the business environment, its configuration must be consistent with the network architecture, security policies and capabilities of the equipment concerned.
What is it used for?
administer multiple hypervisors together.
Practical example
Three Proxmox knots form a cluster.
Common issues
- Inconsistent configuration
- Compatibility or version
- Incomplete dependency diagnosis
Key takeaway: Always adapt the diagnosis to the product version and the architecture actually deployed.
See also: Corosync.