APM URL paths

[jasonrhodes]

We currently assume the top-level urls in APM, if we don't recognize them, are service names.

e.g. {kibana root}/app/apm#/something --> we assume "something" is a service and redirect this URL to #/something/transactions.

Yesterday, after conversations with @sqren and @ogupte about the work done in #25906, we're proposing that for 7.0, we switch to /services/:serviceName and avoid any top-level wildcard matches.

For instance, right now if your service is named "services", the service redirect won't work because "/services" will load the list of services and won't redirect you to "/services/transactions" like it would for any other service name (except "traces" and "invalid-license"). As we add more top-level sections (service-maps perhaps? maybe even traces as their own thing, etc.), it'll probably be good to have reserved namespaces at the top level, so we think it would make sense to make this change for all service URLs in 7.0.

• /:serviceName/(transactions|errors)/* becomes /services/:serviceName/(transactions|errors)/*

[sorenlouv]

Since this is purely UI, shouldn't it be in Kibana?

[elasticmachine]

Pinging @elastic/apm-ui

[alvarolobato]

Moved from APM repo.

[alvarolobato]

@roncohen suggested that a possible solution to this would be removing the service from the URL altogether as we did with transactions.

[sorenlouv]

Closed in #41233