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Mini-guide: Using Cloudflare registrar with external DNS. The gotchas.

Domain Names by walt22 24 replies 3.7K views
1 #11

Thanks. The glue format note is literally one line. "Use host.name.tld not just host." Would have saved me an hour.

#12

One line in docs, six hours in reality. Par for the course.

steveipw said:
Hardware comparison: for that money you get a 2TB enterprise HDD on auction.

At Hetzner auction prices that 2TB is more like €25 now. The savings argument gets worse every year.

6 #13

Still true at scale though. I run 40 domains for various projects. €320/year at Cloudflare vs €440 at Hetzner. €120 buys a lot of auction RAM.

zfs send | zfs receive. repeat.
#14

For my association we have 6 domains. The saving is not worth the trouble. We stay at OVH. Their DNS is slow but predictable.

prix fixe infrastructure: €5/mo
#15

OVH had that fire in Strasbourg. Predictable until it is not.

I am at Gandi now. Expensive but the DNSSEC just works. No registry direct needed.

1 #16

Strasbourg was 2021. Ancient history by cloud standards. OVH recovered fine.

lookuppierre said:
We stay at OVH. Their DNS is slow but predictable.

This. Predictable is the word. These cloud registrar tricks cost you a Tuesday afternoon every six months.

#17

The propagation delay is real. I just tested again with my smokeping setup. 18 minutes this time. API says success, edge says no.

nina64 said:
API success vs. Edge propagation delay

Should be number 6 on your list. Or maybe it is the same bug manifesting differently.

#18

Updated my notes. Thanks PollosHenry.

PollosHenry said:
18 minutes this time

Consistent enough to be a real timeout somewhere in their pipeline. Not random.

#19

How does this work with Cloudflare's own DNS? Same delay or instant? Thinking of moving everything to them instead of external.

#20

Instant on their own DNS. The delay is only external providers. Something about the cross-account sync between registrar and the anycast edge.

I ran an ISP. This smells like two databases with eventual consistency and no read-after-write guarantee.

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