In Huawei FusionCompute, what happens when a host in the cluster fails?

In Huawei FusionCompute, when a host in the cluster fails, the expected behavior involves the management of virtual machines (VMs) to ensure service continuity. The correct answer reflects that the virtual machine fails and needs to be restored manually.

When a host fails, the underlying hypervisor is unable to maintain the operation of the VMs hosted on that failed node. Consequently, the VMs go offline and cannot continue to operate as there is no available host to manage their execution. After the issue with the host is identified, the failed virtual machines must be restored manually, usually by restarting them on a functioning host within the cluster. This emphasizes the importance of planning for failover and restoration processes in cloud environments to minimize downtime.

In contrast, options mentioning automatic migration, pausing all VMs, or continuing operations on a failed host inaccurately portray the expected behavior. Automatic migration occurs in environments with high availability features, which may not apply in every scenario. Pausing VMs or continuing operations without a functioning host would contradict the inherent limitations of the physical infrastructure and the management protocols established in FusionCompute. Hence, the understanding that VMs will require manual intervention after a host failure is key to effective cloud infrastructure management.