In this topology, vSphere clusters built using traditional configuration techniques on PowerOne systems will be recovered at a defined secondary site on a per-cluster basis. The recovery process could take up to several minutes depending on the number of servers involved.
The functional requirements for this approach are:
- Deploy two PowerOne Systems with PowerMax. These systems must be licensed for SRDF and VMware SRM.
- Create, modify or delete a cluster at the primary site. Add volumes to the replication set. Select the mode of protection based on RPO with sync for zero data loss (or) async for data loss up to few seconds to minutes data loss, depending on the RPO.
- Add stretched application VLAN(s), typically called Overlay networks, such as VMware VXLAN using NSX, so that IP addressing will work at the primary or the recovery site. Any mechanism to re-IP and modify DNS entries as needed in the secondary site may also be valid.
- Create, modify or delete remote array connections, called SRDF Groups. Links must be scalable so you can add links to increase throughput.
- Invoke failover/failback to prove all technologies and operational processes are functioning as expected
- In order to be able to attach the replicated storage volumes for failover and failback, create storage-less clusters and add them to the vCenter instance at the secondary site.
- For non-disruptive failover testing, SRM provides an orchestrated recovery validation mechanism called Bubble. Bubble provides a recovery area using SnapVx clones of R2 volumes without impacting the replication process. Isolate the Bubble recovery to specific VLANs or subnets (so that it does not overlap with production or recovery networks
This approach describes a typical Disaster Recovery scenario. Through the integration of PowerOne, SRDF/S/A, and VMware SRM, we can create an automated DR architecture that, in case of a site failure, will failover the production CRGs to the secondary disaster site. VMware SRM automates this multi-step recovery of virtual machines. For more details about pre-requisites, supported devices, and configurations, see Implementing Dell EMC SRDF SRA with VMware SRM.