Robust service deployment

1. A method of deploying a service on a network comprising a plurality of network resources, the method comprising:

providing an actual network model comprising network resources and configurations of the network resources;

providing a computer-implemented network configuration management system controlling the configurations of the network resources in the actual network model;

providing a service description comprising network resource configuration information for implementing the service on specific network resources;

selecting a set of available network resources for deploying the service in the network based on the service description;

reserving available network resources for deploying the service in an off-line version of the actual network model, the off-line version including updated network resource configurations to reflect changes to the configurations of the network resources triggered by a deployment of the service;

deploying the service by updating the actual network model using the off-line version;

comparing the off-line version of the actual network model against a network operating policy and adjusting the off-line version if the off-line version contravenes the policy;

monitoring proposed changes to actual network resource configurations; and

checking if the proposed changes conflict with the updated network resource configurations in the off-line version of the actual network model.

2. The method of claim 1 , wherein the off-line version of the actual network model comprises an actual configuration of a reserved network resource and configuration items of the reserved network resource that are reserved for the deployment of the service.

3. The method of claim 1 , wherein the step of comparing the off-line version of the actual network model against a network operating policy comprises comparing the configuration items of the reserved network resource against the network operating policy.

4. The method of claim 1 , further comprising:

generating a service identification key for the reservation;

receiving a request to activate a service, the request comprising a further key;

comparing the service identification key with the further key; and

deploying the service in case the service identification key matches the further key.

5. The method of claim 4 , further comprising labeling the network resources with the service identification key.

6. The method of claim 5 , further comprising:

receiving a service termination request comprising the service identification key;

identifying deployed network resources labeled with the service identification key; and

returning the labeled deployed network resources to a pool of available actual network resources identified within the network configuration management system.

7. The method of claim 1 , wherein in case of such a conflict, the method further comprises at least one of:

rejecting the proposed changes to the actual network resource configurations;

generating a notification message signaling a conflict between the proposed changes to the actual network resource configurations and the updated network resource configurations in the off-line version of the actual network model;

receiving a reply to the notification message; and

accepting or rejecting the proposed changes in response to the reply.

8. The method of claim 1 , wherein the network resource configuration information further comprises selection criteria for flexible network resources in the network, the method further comprising altering the updated network resource configurations in the off-line version of the actual network model in line with the selection criteria to resolve the conflict.

9. A computer program product comprising a non-transitory computer-readable storage medium including computer program code stored thereon which, when executed on one or more processors of a computer system, implements the method of claim 1 .

10. The computer program product of claim 9 , wherein the computer-readable storage medium is selected from a CD, DVD, flash memory card, a USB memory stick, a random access memory, a read-only memory, a computer hard disk, a storage area network, a network server and an Internet server.

11. A computer system comprising the computer program product of claim 9 and at least one processor adapted to execute the computer program code.

12. The computer system of claim 11 , further comprising a user interface for controlling the network configuration management system.

13. The computer system of claim 11 , wherein the computer system further comprises a network interface for connecting to the network for hosting the service.

14. The method of claim 1 , further comprising:

receiving a service deployment request that identifies the service;

responsive to receiving the service deployment request, retrieving service definitions of the identified service; and

receiving a service activation request, wherein deploying the service is performed responsive to receiving the service activation request.