Reactivation of a software image from a source machine onto a target machine

• US 9,086,939 B2
• Filed: 06/14/2012
• Issued: 07/21/2015
• Est. Priority Date: 06/30/2011
• Status: Active Grant

• Current Assignee: HCL Technologies Limited
• Original Assignee: International Business Machines Corporation
• Inventors: Donatelli, Alessandro, Marinelli, Claudio, Pichetti, Luigi, Ragusa, Roberto
• Primary Examiner(s): Zhen, Li B
• Assistant Examiner(s): Chen, Sen
• Application Number:
  US13/523,808
• Publication Number:
  US 20130007727A1
• Time in Patent Office: 1,132 Days
• Field of Search: 717/177
• US Class Current: 1/1
• CPC Class Codes: G06F 8/63 Image based installation; Cloning; Build to order

Abstract

Provided are a computer program product, system and method for reactivation of a software image from a source machine onto a target machine. Discovery is made of a static software application in the software image listening on a corresponding selected communication channel of the source address. Listening is performed on behalf of the static software application on the corresponding selected communication channel of the target address. An inbound message directed to the selected communication channel of the target address is redirected to the corresponding static software application on the selected communication channel of the source address.

Claims

1. A computer program product comprising a non-transitory computer readable storage medium including code executed to reactivate a software image captured from a source machine having a source address on a target machine having a target address by performing operations, the operations comprising:

discovering a static software application in the software image deployed on the target machine listening on a corresponding selected communication channel of the source address, wherein the static software application is programmed to listen for inbound requests on the source address of the source machine embedded in the static software application, wherein client applications use the target address of the target machine to communicate requests to the static software application, and wherein the static software application listens for inbound requests on the source address when deployed on the target machine;

registering each selected communication channel of the source address with a broker, wherein the broker listens on each selected communication channel of the target address on behalf of the static software application;

listening on a corresponding further selected communication channel of the target address;

re-directing an inbound message directed to the selected communication channel of the target address to the corresponding static software application on the selected communication channel of the source address by forwarding each inbound message directed to each selected communication channel of the target address to the broker for re-directing the inbound message to the corresponding static software application; and

forwarding each further inbound message directed to each further selected communication channel of the target address to a corresponding dynamic software application.

2. The computer program product of claim 1, wherein the operations further comprise:

creating an internal alias for the source address pointing to the target address, wherein the internal alias is used internally by the target machine as a valid address;

binding the static software application to listen on the source address identified by the internal alias; and

using, by the target machine, the internal alias to discover the static software application bound on the corresponding source address.

3. The computer program product of claim 1, wherein each address is an IP address and each communication channel is a port number.

4. The computer program product of claim 3, wherein the static software application is listening on a source socket identified by the source IP address and the selected port number, wherein the re-directing the inbound message further comprises:

translating a target socket, identified by the target IP address and the selected port number, of the inbound message directed thereto into the corresponding source socket.

5. The computer program product of claim 1, wherein the discovering further comprises:

watching the source address to discover the static software application listening on the corresponding communication channel of the source address.

6. The computer program product of claim 5, wherein the watching further comprises:

scanning all the communication channels of the source address at a bootstrap of the target machine.

7. The computer program product of claim 5, wherein the watching further comprises:

scanning all the communication channels of the source address periodically.

8. The computer program product of claim 1, wherein the source machine has a source hostname mapped on the source address and the target machine has a target hostname mapped on the target address, wherein the operations further comprise:

intercepting each mapping query for mapping the source hostname being submitted by a further selected static software application;

replacing the source hostname with the target hostname in each mapping query;

mapping the target hostname into the target address in response to each mapping query, and

returning the target address to the further selected static software application.

9. The computer program product of claim 1, wherein the operations further comprise:

capturing the software image on the source machine;

injecting at least one software component into the software image, wherein the at least one software component is executed to perform the operations of discovering the static software application, listening on behalf of the static software application, and redirecting the inbound message; and

deploying the software image onto the target machine.

10. A system for reactivating a software image captured from a source machine having a source address on a target machine having a target address, comprising:

a processor; and

a non-transitory computer readable storage medium having code executed by the processor to perform operations, the operations comprising;

discovering a static software application in the software image deployed on the target machine listening on a corresponding selected communication channel of the source address, wherein the static software application is programmed to listen for inbound requests on the source address of the source machine embedded in the static software application, wherein client applications use the target address of the target machine to communicate requests to the static software application, and wherein the static software application listens for inbound requests on the source address when deployed on the target machine;

registering each selected communication channel of the source address with a broker, wherein the broker listens on each selected communication channel of the target address on behalf of the static software application;

listening on a corresponding further selected communication channel of the target address;

re-directing an inbound message directed to the selected communication channel of the target address to the corresponding static software application on the selected communication channel of the source address by forwarding each inbound message directed to each selected communication channel of the target address to the broker for re-directing the inbound message to the corresponding static software application; and

forwarding each further inbound message directed to each further selected communication channel of the target address to a corresponding dynamic software application.

11. The system of claim 10, wherein the operations further comprise:

creating an internal alias for the source address pointing to the target address, wherein the internal alias is used internally by the target machine as a valid address;

binding the static software application to listen on the source address identified by the internal alias; and

using, by the target machine, the internal alias to discover the static software application bound on the corresponding source address.

12. The system of claim 10, wherein each address is an IP address and each communication channel is a port number.

13. The system of claim 12, wherein the static software application is listening on a source socket identified by the source IP address and the selected port number, wherein the re-directing the inbound message further comprises:

translating a target socket, identified by the target IP address and the selected port number, of the inbound message directed thereto into the corresponding source socket.

14. The system of claim 10, wherein the discovering further comprises:

watching the source address to discover the static software application listening on the corresponding communication channel of the source address.

15. The system of claim 10, wherein the source machine has a source hostname mapped on the source address and the target machine has a target hostname mapped on the target address, wherein the operations further comprise:

intercepting each mapping query for mapping the source hostname being submitted by a further selected static software application;

replacing the source hostname with the target hostname in each mapping query;

mapping the target hostname into the target address in response to each mapping query, and

returning the target address to the further selected static software application.

16. The system of claim 10, wherein the operations further comprise:

capturing the software image on the source machine;

injecting at least one software component into the software image, wherein the at least one software component is executed to perform the operations of discovering the static software application, listening on behalf of the static software application, and redirecting the inbound message; and

deploying the software image onto the target machine.

17. A method for re-activating a software image captured from a source machine having a source address on a target machine having a target address, comprising:

discovering a static software application in the software image deployed on the target machine listening on a corresponding selected communication channel of the source address, wherein the static software application is programmed to listen for inbound requests on the source address of the source machine embedded in the static software application, wherein client applications use the target address of the target machine to communicate requests to the static software application, and wherein the static software application listens for inbound requests on the source address when deployed on the target machine;

registering each selected communication channel of the source address with a broker, wherein the broker listens on each selected communication channel of the target address on behalf of the static software application;

listening on a corresponding further selected communication channel of the target address;

re-directing an inbound message directed to the selected communication channel of the target address to the corresponding static software application on the selected communication channel of the source address by forwarding each inbound message directed to each selected communication channel of the target address to the broker for re-directing the inbound message to the corresponding static software application; and

forwarding each further inbound message directed to each further selected communication channel of the target address to a corresponding dynamic software application.

18. The method of claim 17, further comprising:

creating an internal alias for the source address pointing to the target address, wherein the internal alias is used internally by the target machine as a valid address;

binding each static software application to listen on the source address identified by the internal alias; and

using, by the target machine, the internal alias to discover the static software application bound on the corresponding source address.

19. The method of claim 17, wherein each address is an IP address and each communication channel is a port number.

20. The method of claim 19, wherein the static software application is listening on a source socket identified by the source IP address and the selected port number, wherein the re-directing the inbound message further comprises:

translating a target socket, identified by the target IP address and the selected port number, of the inbound message directed thereto into the corresponding source socket.

21. The method of claim 17, wherein the discovering further comprises:

watching the source address to discover each static software application listening on the corresponding communication channel of the source address.

22. The method of claim 17, wherein the source machine has a source hostname mapped on the source address and the target machine has a target hostname mapped on the target address, further comprising:

intercepting each mapping query for mapping the source hostname being submitted by a further selected static software application;

replacing the source hostname with the target hostname in each mapping query;

mapping the target hostname into the target address in response to each mapping query, and

returning the target address to the further selected static software application.

23. The method of claim 17, further comprising:

capturing the software image on the source machine;

injecting at least one software component into the software image, wherein the at least one software component is executed to perform the operations of discovering the static software application, listening on behalf of the static software application, and redirecting the inbound message; and

deploying the software image onto the target machine.