registry/metrics
tifayuki 8b70616846 Add notification metrics
It adds notification related prometheus metrics, including:
  - total count for events/success/failure/error
  - total count for notification per each status code
  - gauge of the pending notification queue

Signed-off-by: tifayuki <tifayuki@gmail.com>
2019-02-15 21:14:57 +08:00
..
prometheus.go Add notification metrics 2019-02-15 21:14:57 +08:00