Docs for Datadog metrics and tag filtering in Canary Analysis are in a misleading section

[goodspark]

https://docs.armory.io/docs/spinnaker-user-guides/kayenta-canary-use/#metric-scopes

I was trying to setup canary analysis with Datadog and was trying to ensure that the metrics from my canary config group (eg. system.load.norm.1) was properly filtered.

I think the blurb about Datadog tags should either be moved up into the 'Configuring a Canary Analysis stage' section or further clarified that tag strings should go into the baseline/canary pair input fields, not the extended params.

Update

I think I see what went wrong.

The pictures in the current docs might be from an older version of the UI? Since the section called 'Metric Scopes' in Spinnaker 1.23.0 / Deck 3.4.0 seems to have moved and only encompasses the Extended Params, which aren't needed for Datadog.

From the docs:
https://docs.armory.io/images/Image-2018-04-18-at-1.48.11-PM.png

From Deck 3.4.0:

[aimeeu]

Thanks @goodspark for pointing this out! We've created an internal Jira item to track the work.