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How to remove MST tenancy design

Guide about how to remove the Multi Single Tenancy feature, to use only one tenant instead.

About the Multi Single Tenancy (MST)

Right now, NRN only provides a MST design because that’s just easier to maintain than several tenancy models.

Long story short, if you find yourself using a preset with MST design built-in, but don’t have any use for it, you can:

  • Keep it and only use one tenant. The impact would be very small, it will definitely work properly, even though you only use one tenant.
  • Remove the MST feature manually.
    • I don’t advise anybody not familiar with the NRN source code doing that, it’s not super-complicated, but you need to understand what happens on Vercel and Github Actions quite well.

Also, if you think you might use it someday, then better to keep it for now then, because it’s much harder to configure it properly than to remove it.

Step-by-step guide

Removing MST is fairly simple, when you know what you’re looking for :wink:.

  • Only keep one deployment file per environment (e.g: vercel.staging.json instead of vercel.customer1.staging.json).
  • Remove all unnecessary scripts related to “customer2”.
  • Do a full search of the project looking for customer2, that will tell you where to look for stuff related to MST.
  • Do a full search of the project looking for NEXT_PUBLIC_CUSTOMER_REF, that will tell you where to look for stuff related to MST, you can remove that ENV variable.
  • Cypress (E2E)
    • Rename cypress/videos/customer1 by cypress/videos/production and update e2e scripts to use CYPRESS_STAGE=production instead.
      • You basically need to have a videos/production folder to store videos artifacts when E2E tests are executed manually through CLI.
    • Same applies to the cypress/screenshots folder.
    • Similarly, the cypress/config*.json files should be updated.
  • Update the Github Actions scripts in .github/workflows to make sure the E2E tests use the proper JSON file (run-2e2-tests action)
  • You’ll need to update the GHA deployment scripts to run the proper deployment command (ignoring stuff related to the customer)
    • Basically, stuff like this
      • yarn deploy:$(cat vercel.json | jq -r '.build.env.NEXT_PUBLIC_CUSTOMER_REF'):production:simple --token $VERCEL_TOKEN
      • should become
      • yarn deploy:production:simple --token $VERCEL_TOKEN

That should be all, make sure to do things step by step (GHA, then E2E, etc.) and things in between because it’s likely to break things if you’re not careful.