This module targets Etcd V2 and V3.

When using V2, metrics are collected using https://coreos.com/etcd/docs/latest/v2/api.html[Etcd v2 API].
When using V3, metrics are retrieved from the `/metrics` endpoint as intended for https://coreos.com/etcd/docs/latest/metrics.html[Etcd v3]

When using V3, metricsest are bundled into `metrics`
When using V2, metricsets available are `leader`, `self` and `store`.

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=== Compatibility

The etcd module is tested with etcd 3.2 and 3.3.
