All the components of the Telco Cloud Infrastructure OpenStack Edition platform implement a high availability design by default. In addition, VNFs can take advantage of platform capabilities to extend their availability in compute, storage, and networking.

vSphere High Availability

Redundancy with vSphere uses VM-level replicas along with the VNF high availability architecture. vSphere HA can instantiate a new VM in the event of host failure thus providing redundancy for a VNF and VNFC pair. vSphere HA can be automated without any manual intervention for failure and recovery.

Figure 1. vSphere High Availability

vSphere HA

VMware NSX-T Data Center Availability

NSX-T Data Center by default provides high availability to VNFCs in the overlay network. NIC Teaming and protocols such as Equal-Cost Multipath (ECMP) provide redundant connectivity. The NSX-T architecture also separates the management, control, and data plane traffic to further optimize service availability.

VMware vSAN

vSAN is fully integrated in vSphere and provides policy-driven fault handling with platform awareness such as chassis and rack affinity to store object replicas. The virtual storage is integrated with vRealize Operations so that in case of failure, the failed VM can be cloned and spun up automatically. Storage vMotion can be used to perform live migration of VM disk files (VMDK) within and across storage arrays by maintaining continuous service availability and complete transaction integrity at the same time.