With eEVOS High Availability (HA), your virtual infrastructure is built for resilience. Whether it’s an unexpected hardware failure or planned maintenance, eEVOS ensures your workloads remain available and protected — with minimal or no disruption.

The HA system continuously monitors all nodes within the eEVOS cluster. In the event of a node failure, virtual machines are automatically restarted on another available node, restoring service within seconds. This failover process requires no manual intervention and preserves the operational continuity of your business-critical services.

Live Migration – Seamless Flexibility Without Downtime

eEVOS takes high availability even further with robust live migration capabilities:

• Node-to-node live migration
  Move running VMs between nodes in the same cluster with no downtime — ideal for balancing workloads or performing node maintenance.
• Live storage migration
  Relocate VMs between different storage pools without shutting them down, even while under load.
• Cross-cluster migration
  Transfer VMs between independent eEVOS installations with minimal interruption — perfect for phased infrastructure upgrades or hybrid deployments.

These features ensure your services stay online while giving administrators maximum flexibility to manage infrastructure dynamically.

Key Benefits of High Availability in eEVOS

Centralized Cluster Management
All HA functions are integrated into the eEVOS management interface — no external tooling or scripting required.

Automated Failover
VMs are automatically restarted on healthy nodes if a failure is detected.

No Downtime for Maintenance
Live migration enables system upgrades, hardware changes, or balancing without affecting running workloads.

Intelligent Resource Management
HA policies consider resource availability when selecting the target node for failover or migration.

Storage Redundancy

Storage Mirroring: For smaller two-node setups or specific workloads, eEVOS supports real-time storage mirroring between two hosts. This ensures that if one node or its storage fails, the mirrored copy remains immediately available on the second host.

Ceph-Based Redundancy: When used with Ceph, data is distributed and replicated across nodes, ensuring resilience against disk or node failures.

Fast Recovery Times
Minimal service disruption with rapid detection and response to node failures.