[DD] Investigate Feature Flag tracking, which is included in RUM cost

[jristau1984]

Start here: https://app.datadoghq.com/rum/feature-flags?query=%40session.type%3Auser%20%40application.id%3Ad349503a-05b9-4e6c-9790-253c4b0a3958&filters=%5B%22%40view.name%22%2C%22%40session.type%22%5D&from_ts=1715021209702&to_ts=1715626009702&live=true

Is this worth enabling and tracking for our site?

[robrap]

I put this under the new Future epic. Let me know if that doesn't feel right.

[huniafatima-arbi]

I have created a draft documenting the pros, cons and the effort cost against this ticket.
Link to the draft
@iamsobanjaved @UsamaSadiq Please give it a review.

[robrap]

Hello @huniafatima-arbi. Thanks. I imagine that we'd need the custom feature flag management: https://docs.datadoghq.com/real_user_monitoring/guide/setup-feature-flag-data-collection/?tab=browser&site=us#custom-feature-flag-management. I wonder if your discovery could next go for a timeboxed proof-of-concept, where you try to get this going locally. Then you could determine any challenges in making this pluggable. You could make it work against a test app in Datadog.

If everything works, later, your new code could also be behind a feature flag, and you could enable this in different places and see if it really has a noticeable performance impact.

[robrap]

@huniafatima-arbi: Sorry - I've been out all week.

• I didn't realize this was a RUM feature of DD, so I imagine it would just deal with feature flags in the MFEs.
  • I don't know enough about the DD feature or how we handle flags in our MFEs to provide guidance.
  • I also didn't create the ticket, so I can't really speak to scope. But, if you are only dealing with MFEs, it seems like backend flags wouldn't count unless they were sent to the MFE? Again, I'm not sure.
• My initial guidance was more general about trying to dive into PoC mode, in addition to the documentation, so you could have more clarity on how this works and if we want it, etc.

[dianakhuang]

@jristau1984 the information on the edxapp feature toggles: https://2u-internal.atlassian.net/wiki/spaces/AT/pages/edit-v2/1622868010

[huniafatima-arbi]

https://2u-internal.atlassian.net/wiki/spaces/AT/pages/edit-v2/1622868010

Hi @dianakhuang I believe you have attached the link to our standup notes rather than the DataDog features document. Can you please provide link to that one?
Thank you

[dianakhuang]

🤦 @huniafatima-arbi this should be the correct link: https://2u-internal.atlassian.net/wiki/spaces/AT/pages/16384615/Toggles+State+Reports it's not Datadog toggles tracking, but it is a report on the current state of our toggles.

[robrap]

1. Note that the DD feature seems to be for RUM (frontends), and the Toggle Stage Report is mostly for backends.
2. You should also be aware of this in-progress OEP: [WIP] Add an OEP defining the use of OpenFeature for feature toggles openedx/open-edx-proposals#663.