Is there any AppDynamics open source alternative? I'm looking for something that at least:
- would capture call trees along with time spent on each level allowing to pinpoint the problem
- would work across servers/webservices in soa/microservice architecture - monitoring whole stack, not just single machine/service/jvm
- would support metrics/charting/alerting (or would allow to export relevant data)
If not open, is there anything like that free as in beer? (free version of AppDynamics does not meet 2nd criteria )