Apparatus and method for subscription-based resource throttling in a cloud environment

1. A method by a cloud orchestrator to provide subscription-based throttling of virtual applications in a cloud, the method comprising:

determining that a physical resource in the cloud is being overutilized;

determining a type of the physical resource in the cloud that is being overutilized;

if the physical resource in the cloud that is being overutilized is a physical computing resource, identifying virtual machines that utilize the physical computing resource and identifying virtual applications associated with the virtual machines that utilize the physical computing resource,

otherwise, if the physical resource in the cloud that is being overutilized is a physical network resource, identifying virtual networks that utilize the physical network resource, identifying virtual machines that connects to the virtual networks, and identifying virtual applications associated with the virtual machines that connect to the virtual networks;

selecting one of the virtual applications associated with the virtual machines that utilize the physical computing resource and the virtual applications associated with the virtual machines that connect to the virtual networks as a current virtual application that is a candidate for throttling;

determining that the current virtual application is to be throttled based on a determination that the current virtual application is subscribed to a throttling subscription registry, wherein the throttling subscription registry specifies a throttling mechanism by which to throttle the current virtual application; and

executing the throttling mechanism to throttle the current virtual application in response to a determination that the current virtual application is to be throttled.

2. The method of claim 1 , wherein the throttling mechanism includes sending a message to one or more virtual machines associated with the current virtual application.

3. The method of claim 1 , wherein the throttling mechanism includes sending a message to an element manager that is responsible for managing the current virtual application.

4. The method of claim 1 , wherein the throttling subscription registry specifies a command line command to execute to throttle the current virtual application.

5. The method of claim 1 , further comprising:

receiving a request to subscribe the current virtual application to the throttling subscription registry; and

subscribing the current virtual application to the throttling subscription registry in response to receiving the request.

6. The method of claim 1 , wherein determining that the current virtual application is to be throttled is further based on a determination that one or more throttling conditions specified by the throttling subscription registry for the current virtual application are met.

7. The method of claim 6 , wherein the one or more throttling conditions include a condition that a severity of overutilization meets or exceeds a threshold level.

8. The method of claim 1 , wherein determining that the physical resource in the cloud is being overutilized is based on receiving a message indicating that the physical resource is being overutilized.

9. The method of claim 1 , wherein determining that the physical resource in the cloud is being overutilized is based on actively monitoring utilization of the physical resource and determining that the utilization of the physical resource meets or exceeds a threshold level.

10. A network device to implement a cloud orchestrator that provides subscription-based throttling of virtual applications in a cloud, the network device comprising:

a non-transitory machine-readable storage medium having stored therein a throttling component; and

a set of one or more processors to execute the throttling component to cause the network device to:

determine that a physical resource in the cloud is being overutilized,

determine a type of the physical resource in the cloud that is being overutilized,

if the physical resource in the cloud that is being overutilized is a physical computing resource, identifying virtual machines that utilize the physical computing resource and identifying virtual applications associated with the virtual machines that utilize the physical computing resource,

otherwise, if the physical resource in the cloud that is being overutilized is a physical network resource, identifying virtual networks that utilize the physical network resource, identifying virtual machines that connect to the virtual networks, and identifying virtual applications associated with the virtual machines that connect to the virtual networks,

select one of the virtual applications associated with the virtual machines that utilize the physical computing resource and the virtual applications associated with the virtual machines that connect to the virtual networks as a current virtual application that is a candidate for throttling,

determine that the current virtual application is to be throttled based on a determination that the current virtual application is subscribed to a throttling subscription registry, wherein the throttling subscription registry specifies a throttling mechanism by which to throttle the current virtual application, and

execute the throttling mechanism to throttle the current virtual application in response to a determination that the current virtual application is to be throttled.

11. The network device of claim 10 , wherein the throttling mechanism includes sending a message to one or more virtual machines associated with the current virtual application.

12. The network device of claim 10 , wherein the throttling mechanism includes sending a message to an element manager that is responsible for managing the current virtual application.

13. The network device of claim 10 , wherein the throttling subscription registry specifies a command line command to execute to throttle the current virtual application.

14. A non-transitory machine-readable medium having computer code stored therein, which when executed by a set of one or more processors of a network device implementing a cloud orchestrator, causes the network device to perform operations for providing subscription-based throttling of virtual applications in a cloud, the operations comprising:

determining that a physical resource in the cloud is being overutilized;

determining a type of the physical resource in the cloud that is being overutilized;

if the physical resource in the cloud that is being overutilized is a physical computing resource, identifying virtual machines that utilize the physical computing resource and identifying virtual applications associated with the virtual machines that utilize the physical computing resource,

otherwise, if the physical resource in the cloud that is being overutilized is a physical network resource, identifying virtual networks that utilize the physical network resource, identifying virtual machines that connect to the virtual networks, and identifying virtual applications associated with the virtual machines that connect to the virtual networks;

selecting one of the virtual applications associated with the virtual machines that utilize the physical computing resource and the virtual applications associated with the virtual machines that connect to the virtual networks as a current virtual application that is a candidate for throttling;

determining that the current virtual application is to be throttled based on a determination that the current virtual application is subscribed to a throttling subscription registry, wherein the throttling subscription registry specifies a throttling mechanism by which to throttle the current virtual application; and

executing the throttling mechanism to throttle the current virtual application in response to a determination that the current virtual application is to be throttled.

15. The non-transitory machine-readable medium of claim 14 , wherein the computer code, when executed by the set of one or more processors, causes the network device to perform further operations comprising:

receiving a request to subscribe the current virtual application to the throttling subscription registry; and

subscribing the current virtual application to the throttling subscription registry in response to receiving the request.

16. The non-transitory machine-readable medium of claim 14 , wherein determining that the current virtual application is to be throttled is further based on a determination that one or more throttling conditions specified by the throttling subscription registry for the current virtual application are met.

17. The non-transitory machine-readable medium of claim 16 , wherein the one or more throttling conditions includes a condition that a severity of overutilization meets or exceeds a threshold level.