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Normandy CDN Migration #2341

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4 of 17 tasks
tiftran opened this issue Nov 23, 2022 · 4 comments
Open
4 of 17 tasks

Normandy CDN Migration #2341

tiftran opened this issue Nov 23, 2022 · 4 comments

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@tiftran
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tiftran commented Nov 23, 2022 •
edited

Migrate over to GCP

  • Use nginx/varnish to replicate the exact same responses we serve now, as an interim solution, as a diff dns first
  • Have QA do a sanity check by setting desktop to point to diff dns, run test suite for normandy
  • Use uptake telemetry to get healthy baseline of normandy calls
    Start with a 20% switch over and look at uptake telemetry after a day to ensure normandy calls are as expected
  • Switch over to original dns(100% if previous step is fine)
    Note: for the interest of time and cost and deciding it was somewhat low risk, we rolled out incrementally throughout a single day
  • Roll out 1.45.1 to prod which include caching changes to the v1 endpoint

Follow up work.....

  • Identify consumers of Normandy

    • Analyze user agents to understand the distribution of clients/versions/domains calling/being called
    • identify all the remote calls made by Normandy desktop client

  • Make the code changes for headers that we can get rid of

    • Run a dummy experiment to get baseline
    • Explore making server side changes to deprecate the dependency on certain headers ref:docs
    • Implement changes to remove headers from investigation (Normandy Server)
    • Implement changes (if any) to Normandy Client
    • Migrate CDN again to reflect code changes
    • Run a dummy experiment to ensure there are no breaking changes
    • Setup manual QA process to test clients explicitly hitting old and new CDN

  • Identity which endpoints are no longer used and which arent for deprecation plan
@jaredlockhart
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Uptake telemetry:

https://sql.telemetry.mozilla.org/queries/67658#219874

@jaredlockhart
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image

@tiftran
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tiftran commented Dec 6, 2022

QA Jira: https://mozilla-hub.atlassian.net/browse/QA-1701?atlOrigin=eyJpIjoiNDBmODZlMzUzNmU5NDM1OWIzZDg5NGFhYWNhMWVlZDQiLCJwIjoiamlyYS1zbGFjay1pbnQifQ

@tiftran
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tiftran commented Dec 13, 2022

Summary of what has happened so far:

Nov 29th: Normandy new CDN setup for Normandy was available in the stage environment

Nov 30th: tested 1%, 10%, 25% of requests were moved to the new CDN

Dec 1st: 100% of requests were moved to the new CDN

Dec 2nd: #2342 PR was merged

Dec 5th: v1.145.1 was tagged and pushed to stage, QA request was made

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@jaredlockhart @tiftran