chore(experiment): Proposal for changing/standardizing monitoring dat…

…a model

See spinnaker-monitoring-daemon/experimental/README.md for more info about the proposal.
This PR is a working specification along with new dashboards for Prometheus and Stackdriver.
They are relegated to an "experimental" tag to sit outside the production codepaths,
but are fully working and compatible with production microservice (and daemon) deployments.

There are no Spinnaker code changes involved, only configuration.
The persistent metric data collected will be incompatible with previous production microservices
when choosing to opt-in to using the provided configuration.

spinnaker-monitoring-daemon/experimental/spinnaker-monitoring-local.yml

@@ -0,0 +1,36 @@
+prometheus:
+  # By default, for historical reasons, spinnaker uses ':' as a hierarchical
+  # separator in prometheus metric names. This is non-0standard for prometheus
+  # and, in fact, unadvised.
+  #
+  # Setting this option to True will use standard notation ('_') instead of ':'.
+  # Note that this is incompmatible with the published dashboards however is
+  # required for the experimental dashboards.
+  use_standard_notation: True
+
+datadog:
+  # This is false by default for historical compatability.
+  # If/when new dashboards are written for datadog, have them based on this
+  # being true.
+  # Historically datadog metrics were written without types, meaning they were
+  # gauges. By setting this to true, meter type information will be reported so
+  # spectator counters will become datadog counters.
+  # use_types: true
+
+spectator:
+  # Do not decorate metric names with a service prefix.
+  # This is true by default for historic compatability, however
+  # is no longer needed/desired given the spin_* tags.
+  decorate_metric_name: false
+
+  # Do not alias service names to their base service names.
+  # When true this would turn "clouddriver-readonly" to "clouddriver"
+  # When false this leaves "clouddriver-readonly" as is.
+  # This is true by default for historic compatability, however
+  # is no longer needed/desired given the spin_* tags.
+  use_base_service_name_only: false
+
+  # Adds spin_service and spin_variant tags for each metric
+  # This also changes the defaults of
+  #    decorate_metric_name and use_base_service_name_only to "false"
+  inject_service_tag: true