Single sign-on between multiple data centers

1. A method for single sign-on (SSO) access among data centers, the method comprising:

receiving, at a first computer server managing access to a first data center, a single sign-on authentication cookie from a client device, the cookie stored by the client device and generated by a second computer server managing access to a second data center with which a user of the client device has been successfully authenticated in conjunction with at least one session object stored by the second computer server, the cookie comprising a reference to the second data center;

generating, by the first computer server, a session retrieval request addressed to the second computer server using the reference included in the cookie received from the client device;

sending, by the first computer server, the session retrieval request from the first data center to the second computer server of the second data center requesting session data from the at least one session object stored by the second computer server; and

generating, by the first computer server, a session object sufficient to authenticate the user of the client device to at least one resource associated with the first data center using the session data requested from the at least one session object stored by the second computer server.

2. The method of claim 1 , further comprising:

receiving, by the first computer server, the session data from the second data center in response to the session retrieval request; and

initializing, at the first data center, the session object with the session data from the second data center sufficient to authenticate the user of the client device at the first data center.

3. The method of claim 2 , further comprising:

terminating a session of the user at the second data center based on the initializing of the session object at the first data center.

4. The method of claim 3 , wherein the terminating is based upon an administrator preference to have only one active user session at a time in the data centers.

5. The method of claim 2 , further comprising:

terminating a session of the user at the second data center and the session object at the first data center in response to the user logging out of the first data center.

6. The method of claim 1 , further comprising:

prompting, from the first data center, the user for authentication credentials based on an administrator preference.

7. The method of claim 1 , further comprising:

determining, by the first computer server, that the second data center cannot respond to the session retrieval request;

determining, by the first computer server, that a local security store of the first data center includes session data previously replicated from the second data center;

reading, from the local security store of the first data center, the session data previously replicated from the second data center; and

initializing, by the first computer server, at least one session object with the session data from the local security store sufficient to authenticate the user of the client device at the first data center.

8. The method of claim 1 , further comprising:

determining, by the first computer server, that the second data center cannot respond to the session retrieval request;

determining, by the first computer server, that a local security store of the first data center does not have sufficient session data for the client device replicated from the second data center;

prompting, by the first computer server, the user for authentication credentials;

receiving, by the first computer server, authentication credentials from the user in response to the prompt; and

initializing, by the first computer server, at least one session object using the received authentication credentials.

9. A system of a first data center, comprising:

a communications interface having a communications path to a system of a second data center;

a memory storing a plurality of instructions; and

one or more hardware processors which when execute the plurality of instructions configure the one or more processors to:

receive a single sign-on authentication cookie from a client device, the cookie stored by the client device and generated by the system of the second data center with which a user of the client device has been successfully authenticated in conjunction with at least one session object stored by the system of the second data center, the cookie comprising a reference to the second data center;

generate a session retrieval request addressed to the system of the second data center using the reference included in the cookie received from the client device;

send, using the communications interface, the session retrieval request to system of the second data center requesting session data from the at least one session object stored by the system of the second data center; and

generate, in the memory, a session object sufficient to authenticate the user of the client device to at least one resource associated with the first data center using the session data requested from the at least one session object stored by the system of the second data center.

10. The system of the first data center of claim 9 , wherein the plurality of instructions further configure the one or more processors to:

receive, using the communications interface, the session data from the system of the second data center in response to the session retrieval request; and

initialize the session object with the session data from the second data center sufficient to authenticate the user of the client device at the first data center.

11. The system of the first data center of claim 10 , wherein the plurality of instructions further configure the one or more processors to:

terminate a session of the user at the second data center based on the initializing of the session object at the first data center.

12. The system of the first data center of claim 10 , wherein the plurality of instructions further configure the one or more processors to:

terminate a session of the user at the second data center and the session object at the first data center in response to the user logging out of the first data center.

13. The system of the first data center of claim 9 , wherein the plurality of instructions further configure the one or more processors to:

determine that the second data center cannot respond to the session retrieval request;

determine that a local security store of the first data center includes session data previously replicated from the second data center;

read, from the local security store of the first data center, the session data previously replicated from the second data center; and

initialize at least one session object with the session data from the local security store sufficient to authenticate the user client device at the first data center.

14. The system of the first data center of claim 9 , wherein the plurality of instructions further configure the one or more processors to:

determine that the second data center cannot respond to the session retrieval request;

determine that a local security store of the first data center does not have sufficient session data for the client device replicated from the second data center;

prompt the user for authentication credentials;

receive authentication credentials from the user in response to the prompt; and

initializing at least one session object using the received authentication credentials.

15. A non-transitory computer-readable medium storing a plurality of instructions executable by one or more processors of a first data center, the plurality of instructions causing the one or more processors to:

receive a single sign-on authentication cookie from a client device, the cookie stored by the client device and generated by a computer server managing access to a second data center with which a user of the client device has been successfully authenticated in conjunction with at least one session object stored by the computer server, the cookie comprising a reference to the second data center;

generate a session retrieval request addressed to the computer server using the reference included in the cookie received from the client device;

send the session retrieval request to the computer server of the second data center requesting session data from the at least one session object stored by the computer server; and

generate a session object sufficient to authenticate the user of the client device to at least one resource associated with the first data center using the session data requested from the at least one session object stored by the computer server.

16. The computer-readable medium of claim 15 , the plurality of instructions further causing the one or more processors to:

receive the session data from the second data center in response to the session retrieval request; and

initialize the session object with the session data from the second data center sufficient to authenticate the user client device at the first data center.

17. The computer-readable medium of claim 16 , the plurality of instructions further causing the one or more processors to:

terminate a session of the user at the second data center based on the initializing of the session object at the first data center.

18. The computer-readable medium of claim 16 , the plurality of instructions further causing the one or more processors to:

terminate a session of the user at the second data center and the session object at the first data center in response to the user logging out of the first data center.

19. The computer-readable medium of claim 15 , the plurality of instructions further causing the one or more processors to:

determine that the second data center cannot respond to the session retrieval request;

determine that a local security store of the first data center includes session data previously replicated from the second data center;

read, from the local security store of the first data center, the session data previously replicated from the second data center; and

initialize at least one session object with the session data from the local security store sufficient to authenticate the user client device at the first data center.

20. The computer-readable medium of claim 15 , the plurality of instructions further causing the one or more processors to:

determine that the second data center cannot respond to the session retrieval request;

determine that a local security store of the first data center does not have sufficient session data for the client device replicated from the second data center;

prompt the user for authentication credentials;

receive authentication credentials from the user in response to the prompt; and

initialize at least one session object using the received authentication credentials.