VMware Cloud Director Container Service Extension Server High Availability

From VMware Cloud Director Container Service Extension 4.0, the VMware Cloud Director Container Service Extension server is highly available. The high availability features display how you can use the VMware Cloud Director Container Service Extension server to optimize workload performance.

VMware Cloud Director Container Service Extension server high availability means it can remain continously functional, even when issues occur. If an incident occurs, the highly available server can shift workloads and configurations away from the affected nodes. The capability to minimize unplanned interruptions allows the server to be operational at all times.

The following table details the features of VMware Cloud Director Container Service Extension server high availability:

Features	Description
Horizontal scalability of the server	You can run VMware Cloud Director Container Service Extension service in multiple virtual machines simultaneously.
Elimination of redundant software and applications	Ability of the software to react to failures. Systemctl restarts VMware Cloud Director Container Service Extension service whenever it fails.
No single point of failure	A failure in a single component does not crash the entire infrastructure. Even when the VMware Cloud Director Container Service Extension server fails, VMware Cloud Director can accept requests. Cluster upgrade and resize operations do not require the VMware Cloud Director Container Service Extension server to be running.
Fault tolerence	The system can recover from failures. VMware Cloud Director Container Service Extension provides Auto-repair as a feature in the cluster creation workflow. For more information, see Create a Tanzu Kubernetes Grid Cluster.
Disaster recovery	Recovery from a catastrophic event where a physical data center or other infrastructure is damaged. As VMware Cloud Director Container Service Extension is stateless, all of its configuration information is stored in the form of an RDE in the VMware Cloud Director database. All the cluster RDEs are also stored in the VMware Cloud Director database. RDEs can be backed up along with OVDC using VMware Cloud Director Disaster Recovery strategies. To prepare for a cluster failure, it is recommended to use VMware Cloud Director™ Object Storage Extension™ to back up cluster information. For more information, see Backing up and Restoring Kubernetes Clusters.