VMware, Inc.
Split-brain prevention in a high availability system during workload migration

Abstract:

In some embodiments, a method receives a control message from a second host. The control message includes a first address to use as a next hop to reach an active workload that has migrated to the second host from another host. The method reprograms a local route table to include a policy to send packets to check a liveness of the active workload with the next hop of the first address. A packet is sent from a standby workload to the active workload using the next hop of the first address to check the liveness of the active workload. The packet is encapsulated and sent between the first host and the second host using an overlay channel between a first endpoint of the overlay channel on the first host and a second endpoint of the channel on the second host.