Can't re-add a domain when migrating app from v1 to v2

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I’m trying to migrate an app from v1 to v2.

Just deployed the app and now I need to add the domain to the new app but I’m getting this error:

Error Validation failed: Name has already been taken

I guess Fly expects me to remove the domain from the v1 app? If that’s the case, how can I achieve zero downtime migration?

If I remove the domain from the v1 app then people with the cached old DNS won’t be able to access the app.

I did this procedure two weeks ago with another app and I didn’t get this error. Simply added the domain to the v2 app, changed the DNS, and waited two days for the DNS propagation before deleting the v1 app.

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2

This is on “fly certs add” or something else? I was able to create duplicates there.

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Yeah I can probably add a cert for the domain of the v2 app, but AFAIK without adding the domain with fly domains add the Fly router won’t send the requests to the new v2 app.

4

Hmmm…never knew “fly domains” even existed. Seems like it is only for registration.

$ fly domains
Manage domains
Notice: this feature is deprecated and no longer supported.
You can still view existing domains, but registration is no longer possible.

I never used this during migration and everything worked for routing.

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5

Thanks I completely missed that message!

Only saw the error and made bad assumptions.

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6

Ok this worked.

Some tips for future Pier who’s an idiot and will probably forget this.

Create the cert, do the verification procedure (_acme-challenge etc), and confirm the cert has been issued before switching the DNS of the domain :sweat_smile:

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