There is currently an srv_queue converter which is capable of taking the output of a dynamic name and determining the queue length for a given server. In addition there is a sample fetcher for whether a server is currently up. This simply combines the two such that srv_is_up can be used as a converter too.
To avoid code duplication, extract the server lookup into a function from the existing converter and re-use in both implementations. Future work might extend this to other sample fetchers for servers, but this is probably the most useful for acl routing.
0001-MINOR-backend-srv_is_up-converter.patch
Description: Binary data
