Managing web services using a reverse proxy

A computer program product to manage traffic in a web services cluster using a programmable reverse proxy in the web services cluster, the computer program product comprising:

• a non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code executable to perform an operation comprising:
• defining, in a routing table in the reverse proxy, a plurality of stacks and a weight for each stack of the plurality of stacks, wherein each stack of the plurality of stacks specifies a mapping to at least one version of at least one of a plurality of web services hosted by the web services cluster;
• receiving, at the reverse proxy, a URL indicating a request to access a first web service, of the plurality of web services;
• selecting one of a first stack and a second stack, of the plurality of stacks, based on the weights of each of the first and second stacks, wherein the first stack specifies a mapping of the first web service to a first version of the first web service, wherein the second stack specifies a mapping of the first web service to a second version of the first web service, wherein each of the first stack and the second stack are selected at least once for a plurality of requests;
• and
• generating, at the reverse proxy, an outgoing URL directed to the version of the first web service specified in the mapping of the selected one of the first stack and the second stack.

A system, comprising:

• one or more computer processors;
• and
• a memory containing a program, which, when executed by the one or more computer processors, performs an operation to manage traffic in a web services cluster using a programmable reverse proxy in the web services cluster, the operation comprising:
• defining, in a routing table in the reverse proxy, a plurality of stacks and a weight for each stack of the plurality of stacks, wherein each stack of the plurality of stacks specifies a mapping to at least one version of at least one of a plurality of web services hosted by the web services cluster;
• receiving, at the reverse proxy, a URL indicating a request to access a first web service, of the plurality of web services;
• selecting one of a first stack and a second stack, of the plurality of stacks, based on the weights of each of the first and second stacks, wherein the first stack specifies a mapping of the first web service to a first version of the first web service, wherein the second stack specifies a mapping of the first web service to a second version of the first web service, wherein each of the first stack and the second stack are selected at least once for a plurality of requests;
• and
• generating, at the reverse proxy, an outgoing URL directed to the version of the first web service specified in the mapping of the selected one of the first stack and the second stack.