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now all my apps are using backblaze as storage, Cloudflare only as DNS (CNAME → test001-b2.test.com → f002.backblazeb2.com)

now I want to migrate storage from backblaze to Cloudflare R2 softly, without app upgrade. (I already sync data between two cloud storages, now need to change DNS CNAME record) Here softly, I mean no 404 or other non-200 response status code. I find change the subdomain dns record to backblaze to Cloudflare r2, I have to delete existed dns record, and add Cloudflare r2 custom domain, during the operation time gap, live app sounds like cannot fetch resource, and return 404. How to resolve it, to make the migration softly, no influence to my online users?

test001-b2.test.com - ❌ → backblaze

                    - ✅ → cloudflare R2

thanks

Xun Lee
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  • no upgrade on app, so the request url cannot be changed, and I already sync data between two storages, now need to change dns record direction. To do that, but DNS CNAME cannot be deleted (Cloudlfare also not accept duplicated record names). Really puzzled me a lot. – Xun Lee Feb 17 '23 at 07:27

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