Feature #14714

Updated by Tom Clegg over 2 years ago

Should include:
* use lib/service to do generic service things like set up logging and a Prometheus registry, find appropriate port to listen on, start http server (along the lines of source:services/health/main.go@13647-keepstore-config and source:lib/dispatchcloud/cmd.go@13647-keepstore-config)

Should not include:
* Load keep services list from config file instead of arvados/v1/keep_services endpoint (seems unsafe to do this until we can be assured the config is fully migrated; meanwhile, the keep_services endpoint is safe to use throughout the migration)
* Rendezvous by volume instead of by server (see #15641)