Precursor-to: BP rates-derived-from-cumulative
Adds support for regex-based name and unit mapping to the
rate_of_change transformer. Regular expression back-references
are key to simplifying potentially repetitive config.
This avoids a explosion of pipelines to apply conversions to
classes of similar meters. For example to allow the following
sample derivations:
* disk.read.requests (request) -> disk.read.requests.rate (request/s)
* disk.write.requests (request) -> disk.write.requests.rate (request/s)
* disk.read.bytes (B) -> disk.read.bytes.rate (B/s)
* disk.write.bytes (B) -> disk.write.bytes.rate (B/s)
to be mapped via a single transformer config:
transformers:
- name: "rate_of_change"
parameters:
source:
map_from:
name: "disk\\.(read|write)\\.(bytes|requests)"
unit: "(B|request)"
target:
map_to:
name: "disk.\\1.\\2.rate"
unit: "\\1/s"
type: "gauge"
Change-Id: I94b6bfbef538a8b067c3c5ff65066505a199bc5a
943fafb929