[Experimental] Metrics Forwarder

[achille-roussel]

ecs-logs already has the ability to send metrics to statsd, but services that wish to produce more complex metrics have to include a statsd client library and produce their own.

The ecs-logs format could be extended with a metrics field that contains a list of metrics the ecs-logs would be in charge of forwarded to the configured destinations that support it.

Here's a list of the potential benefits:

• standardize metrics collection
• no extra dependency required on the service to produce metrics
• ecs-logs logging libraries can automatically collect service metrics from within the processes
• sending metrics data to different tools becomes trivial