Distributed system to determine a server's health

• US 10,686,683 B2
• Filed: 12/29/2017
• Issued: 06/16/2020
• Est. Priority Date: 05/16/2014
• Status: Active Grant

• Current Assignee: A10 Networks Incorporated
• Original Assignee: A10 Networks Incorporated
• Inventors: Jalan, Rajkumar, Sankar, Swaminathan, Kamat, Gurudeep
• Primary Examiner(s): Srivastava, Vivek
• Assistant Examiner(s): Bukhari, Sibte H
• Application Number:
  US15/858,163
• Publication Number:
  US 20180123926A1
• Time in Patent Office: 900 Days
• Field of Search: 709224
• CPC Class Codes: H04L 43/04 Processing captured monitoring data, e.g. for logfile generation
• CPC Class Codes: H04L 43/08 Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 43/0817 by checking functioning

Abstract

Exemplary embodiments for a distributed system for determining a server'"'"'s health are disclosed. The systems and methods provide for a network controller to direct one or more servicing nodes to check the health of one or more servers, and report a health score to the network controller. The network controller may then calculate, update and maintain a health score for each server in the network from the various health scores reported to it from the servicing nodes. This allows a distributed system to be used to facilitate network operations, as a single device is not relied on for periodically determining each server'"'"'s health.

Claims

1. A system for determining a health score of a server, the system comprising:

a plurality of servicing nodes; and

a network controller configured to;

receive a request for a service session;

direct the plurality of servicing nodes to determine a health score of a plurality of servers, each of the plurality of servicing nodes being an individual network node and configured to determine the health score of at least one server of the plurality of servers;

receive a plurality of health scores of the at least one server of the plurality of servers from the plurality of servicing nodes, the plurality of health scores including the health score of the at least one server of the plurality of servers received from each of the plurality of servicing nodes;

calculate an aggregated health score of the at least one server of the plurality of servers using the received plurality of health scores of the at least one server of the plurality of servers; and

send the aggregated health score of the at least one server of the plurality of servers to a servicing node designated the process the service session by selecting, by the servicing node, based on the aggregated health score, one of the plurality of servers for serving the service session, wherein the sending the aggregated health score to the servicing node designated to process the service session enables the servicing node to use the aggregated health score to select the server or not select the server for the service session, wherein the servicing node designated to process the service session is one of the plurality of servicing nodes, and the aggregated health score conflicts with the health score determined by the servicing node, wherein the servicing node designated to process the service session does not select the server based on the aggregated health score when the servicing node designated to process the service session would have selected the server if using the health score determined by the servicing node.

2. The system of claim 1, wherein the servicing node designated to process the service session is not one of the plurality of servicing nodes that reported a health score to the network controller.

3. The system of claim 1, wherein the aggregated health score is based on a majority of health scores received by the network controller.

4. The system of claim 1, wherein the aggregated health score is based on an average of the received health scores, or a weighted average of the received health scores.

5. The system of claim 1, wherein the network controller is further configured to:

receive one or more updated health scores from at least one of the plurality of servicing nodes;

calculate an updated aggregated health score based on the one or more updated health scores; and

send the updated aggregated health score to the servicing node designated to process the service session.

6. The system of claim 1, wherein at least one of the received health scores comprises one or more scores related to connectivity, system resource utilization, number of connections, and load of a service application.

8. The system of claim 2, wherein, based on the aggregated health score, the servicing node designated to process the service session does not select the server, when the servicing node would have selected the server without using the aggregated health score.

9. The system of claim 3, wherein the majority of received health scores indicate that the server is in good health, or the majority of received health scores indicate that the server is in poor health.

7. A system for determining a health score of a server, the system comprising:

a plurality of servicing nodes; and

a network controller configured to;

receive a request for a service session;

direct the plurality of servicing nodes to determine a health score of a plurality of servers, each of the plurality of servicing nodes being an individual network node and configured to determine the health score of at least one server of the plurality of servers;

receive a plurality of health scores of the at least one server of the plurality of servers from the plurality of servicing nodes, the plurality of health scores including the health score of the at least one server of the plurality of servers received from each of the plurality of servicing nodes;

calculate an aggregated health score of the at least one server of the plurality of servers using the received plurality of health scores of the at least one server of the plurality of servers;

send the aggregated health score of the at least one server of the plurality of servers to a servicing node designated the process the service session, wherein the sending the aggregated health score to the servicing node designated to process the service session enables the servicing node to use the aggregated health score to select the server or not select the server for the service session, wherein the servicing node designated to process the service session is not one of the plurality of servicing nodes that reported a health score to the network controller;

receive one or more updated health scores from at least one of the plurality of servicing nodes;

calculate an updated aggregated health score based on the one or more updated health scores; and

send the updated aggregated health score to the servicing node designated to process the service session by selecting, by the servicing node, based on the aggregated health score, one of the plurality of servers for serving the service session, wherein;

the servicing node designated to process the service session is one of the plurality of servicing nodes, and the aggregated health score conflicts with the health score determined by the servicing node; and

the servicing node designated to process the service session does not select the server based on the aggregated health score when the servicing node designated to process the service session would have selected the server if using the health score determined by the servicing node.

17. The system of claim 7, wherein the servicing node designated to process the service session is one of the plurality of servicing nodes, and the aggregated health score conflicts with the health score determined by the servicing node.

18. The system of claim 17, wherein the servicing node designated to process the service session does not select the server based on the aggregated health score when the servicing node designated to process the service session would have selected the server if using the health score determined by the servicing node.

10. A system for determining a health score of a server, the system comprising:

a plurality of servicing nodes; and

a network controller configured to;

receive a request for a service session;

direct the plurality of servicing nodes to determine a health score of a plurality of servers, each of the plurality of servicing nodes being an individual network node and configured to determine the health score of at least one server of the plurality of servers;

receive a plurality of health scores of the at least one server of the plurality of servers from the plurality of servicing nodes, the plurality of health scores including the health score of the at least one server of the plurality of servers received from each of the plurality of servicing nodes;

calculate an aggregated health score of the at least one server of the plurality of servers using the received plurality of health scores of the at least one server of the plurality of servers; and

send the aggregated health score of the at least one server of the plurality of servers to a servicing node designated the process the service session by selecting, by the servicing node, based on the aggregated health score, one of the plurality of servers for serving the service session, wherein the sending the aggregated health score to the servicing node designated to process the service session enables the servicing node to use the aggregated health score to select the server or not select the server for the service session, wherein the servicing node designated to process the service session is not one of the plurality of servicing nodes that reported a health score to the network controller, wherein;

the servicing node designated to process the service session is one of the plurality of servicing nodes, and the aggregated health score conflicts with the health score determined by the servicing node; and

the servicing node designated to process the service session does not select the server based on the aggregated health score when the servicing node designated to process the service session would have selected the server if using the health score determined by the servicing node.

11. The system of claim 10, wherein, based on the aggregated health score, the servicing node designated to process the service session does not select the server, when the servicing node would have selected the server without using the aggregated health score.

12. The system of claim 10, wherein the aggregated health score is based on a majority of health scores received by the network controller.

13. The system of claim 12, wherein the majority of received health scores indicate that the server is in good health, or the majority of received health scores indicate that the server is in poor health.

14. The system of claim 10, wherein the aggregated health score is based on an average of the received health scores, or a weighted average of the received health scores.

15. The system of claim 10, wherein the network controller is further configured to:

receive one or more updated health scores from at least one of the plurality of servicing nodes;

calculate an updated aggregated health score based on the one or more updated health scores; and

send the updated aggregated health score to the servicing node designated to process the service session.

16. The system of claim 10, wherein at least one of the received health scores comprises one or more scores related to connectivity, system resource utilization, number of connections, and load of a service application.