override_existing_dns_record
@Vero @SuperHelpflare
We deployed our frontend to workers assets, but we have A record for our domain
and when we trying to configure Custom domain it showing error:(
already has externally managed DNS records (A, CNAME, etc). Either delete them, try a different hostname, or use the option 'override_existing_dns_record' to override.i tried to find any information regarding override_existing_dns_record but didn't find any documentation regarding that https://developers.cloudflare.com/search/?query=override_existing_dns_record how we can override DNS record to Workers without downtime?
8 Replies
Is this in CI?
no in UI but same issue in CI
right now we managing it via worker routes but it working not perfect cause part of requests going to old frontend (
we have route example.com/* but request to www.example.com going to old frontend
but www should redirect CNAME www.example.com -> example.com
so i created second route www.example.com, but it looks strange... managing DNS via routes instead of dns
so we have now strange situation,
example.com A record -> IP address
www.example.com CNAME -> example.com
routes:
example.com/* -> worker
www.example.com/* -> worker
I do see that if you use
wrangler, it should ask if you want to override
Not sure if the Dashboard does that thoughusing but it was return error, let me check 1 min
hm.. looks like we didn't try to deploy custom domain via wrangler on prod
but question still same how i can override without downtime A record to custom domain in worker assets deployment?
let me share stage example of wrangler
name = "example-stage"
compatibility_date = "2025-01-01"
workers_dev = false
[placement]
mode = "smart"
[assets]
directory = "./build"
not_found_handling = "single-page-application"
[env.stage]
name = "example-stage"
routes = [
{ pattern = "example.com", custom_domain = true }
]
@Hard@Work ^
So what happens if you deploy?
let me check 1 min
Total Upload: 0.34 KiB / gzip: 0.24 KiB
No bindings found.
Uploaded example-prod (17.93 sec)
✘ [ERROR] A request to the Cloudflare API (/accounts/xxxxxxxx/workers/scripts/example-prod/domains/records) failed.
Hostname 'example.com' already has externally managed DNS records (A, CNAME, etc). Either delete
them, try a different hostname, or use the option 'override_existing_dns_record' to override.
[code: 100117]
If you think this is a bug, please open an issue at:
https://github.com/cloudflare/workers-sdk/issues/new/choose
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so problem the same:(
@Hard@Work ^