Virtual-machine-specific failover protection

1. A system, comprising:

a cluster comprising a plurality of hosts;

a plurality of virtual machines executing in the cluster; and

a data store comprising executable instructions, wherein the instructions, when executed by at least one processor, cause at least one computing device to at least:

receive a power-on request associated with a protected virtual machine of the plurality of virtual machines, a configuration of the protected virtual machine indicating that virtual-machine-specific failover protection is enabled;

execute the protected virtual machine on a first host of the cluster;

create, on a second host of the cluster, a dynamic virtual machine slot for the protected virtual machine, the dynamic virtual machine slot being created to match a hardware resource configuration of the protected virtual machine;

maintain an anti-affinity rule between the protected virtual machine and the dynamic virtual machine slot, the anti-affinity rule prohibiting the dynamic virtual machine slot and the protected virtual machine from residing on a same host;

create, on a third host of the cluster, a second dynamic virtual machine slot for the protected virtual machine matching the hardware resource configuration of the protected virtual machine based on a number of failures to tolerate being greater than one, wherein the second dynamic virtual machine slot is created on the third host of the cluster in response to the anti-affinity rule;

identify a provisioning operation that modifies the protected virtual machine to require an updated hardware resource configuration, the updated hardware resource configuration comprising a memory or a CPU configuration; and

update the dynamic virtual machine slot and the second dynamic virtual machine slot to match the updated hardware resource configuration.

2. The system of claim 1 , wherein the dynamic virtual machine slot is moved from the second host to a fourth host in order to match the updated hardware resource configuration.

3. The system of claim 1 , wherein the instructions, when executed by the at least one processor, further cause the at least one computing device to at least:

identify a failure of the first host; and

in response to the failure of the first host, execute the protected virtual machine in the dynamic virtual machine slot on the second host.

4. The system of claim 1 , wherein the instructions, when executed by the at least one processor, further cause the at least one computing device to at least:

determine that the protected virtual machine is powered off; and

destroy the dynamic virtual machine slot based on the protected virtual machine being powered off.

5. The system of claim 1 , wherein the hardware resource configuration comprises a central processing unit (CPU) configuration and a memory configuration.

6. A non-transitory computer-readable medium comprising executable instructions, wherein the instructions, when executed by at least one processor, cause at least one computing device to at least:

receive a power-on request associated with a protected virtual machine, a configuration of the protected virtual machine indicating that virtual-machine-specific failover protection is enabled;

execute the protected virtual machine on a first host of a cluster;

create, on a second host of the cluster, a dynamic virtual machine slot for the protected virtual machine, the dynamic virtual machine slot being created to match a hardware resource configuration of the protected virtual machine;

maintain an anti-affinity rule between the protected virtual machine and the dynamic virtual machine slot, the anti-affinity rule prohibiting the dynamic virtual machine slot and the protected virtual machine from residing on a same host;

create, on a third host of the cluster, a second dynamic virtual machine slot for the protected virtual machine matching the hardware resource configuration of the protected virtual machine based on a number of failures to tolerate being greater than one, wherein the second dynamic virtual machine slot is created on the third host of the cluster in response to the anti-affinity rule;

identify a provisioning operation that modifies the protected virtual machine to require an updated hardware resource configuration, the updated hardware resource configuration comprising a memory or a CPU configuration; and

update the dynamic virtual machine slot and the second dynamic virtual machine slot to match the updated hardware resource configuration.

7. The non-transitory computer-readable medium of claim 6 , wherein the dynamic virtual machine slot is moved from the second host to a fourth host in order to match the updated hardware resource configuration.

8. The non-transitory computer-readable medium of claim 6 , wherein the instructions, when executed by the at least one processor, further cause the at least one computing device to at least:

identify a failure of the first host; and

in response to the failure of the first host, execute the protected virtual machine in the dynamic virtual machine slot on the second host.

9. The non-transitory computer-readable medium of claim 6 , wherein the instructions, when executed by the at least one processor, further cause the at least one computing device to at least:

determine that the protected virtual machine is powered off; and

destroy the dynamic virtual machine slot based on the protected virtual machine being powered off.

10. The non-transitory computer-readable medium of claim 6 , wherein the hardware resource configuration comprises a central processing unit (CPU) configuration and a memory configuration.

11. A method comprising:

receiving a power-on request associated with a protected virtual machine, a configuration of the protected virtual machine indicating that virtual-machine-specific failover protection is enabled;

executing the protected virtual machine on a first host of a cluster;

creating, on a second host of the cluster, a dynamic virtual machine slot for the protected virtual machine, the dynamic virtual machine slot being created to match a hardware resource configuration of the protected virtual machine;

maintaining an anti-affinity rule between the protected virtual machine and the dynamic virtual machine slot, the anti-affinity rule prohibiting the dynamic virtual machine slot and the protected virtual machine from residing on a same host;

create, on a third host of the cluster, a second dynamic virtual machine slot for the protected virtual machine matching the hardware resource configuration of the protected virtual machine based on a number of failures to tolerate being greater than one, wherein the second dynamic virtual machine slot is created on the third host of the cluster in response to the anti-affinity rule;

identify a provisioning operation that modifies the protected virtual machine to require an updated hardware resource configuration, the updated hardware resource configuration comprising a memory or a CPU configuration; and

update the dynamic virtual machine slot and the second dynamic virtual machine slot to match the updated hardware resource configuration.

12. The method of claim 11 , wherein the dynamic virtual machine slot is moved from the second host to a fourth host in order to match the updated hardware resource configuration.

13. The method of claim 11 , further comprising:

identifying a failure of the first host; and

in response to the failure of the first host, executing the protected virtual machine in the dynamic virtual machine slot on the second host.

14. The method of claim 11 , further comprising:

determining that the protected virtual machine is powered off; and

destroying the dynamic virtual machine slot based on the protected virtual machine being powered off.