IP rotation on vds?

Question

Computer networks

tell me what available methods exist for organizing rotation within vds for domains.
for example round-robin dns, what else can you suggest.

the rotation must comply with the smtp policy of the domains. ip=spf/DKIM/...

Answer 1

round-robin doesn't work as you'd expect because DNS requests are cached.
in particular, Google has long abandoned round-robin in its DNS servers,
and any other rotation will not work for the same reason.
this can only be done correctly on the client.
for example, you have 10 records of type A in DNS,
the client receives all 10.
then round-robin is done on the client

Answer 2

another difficulty is that round-robin polls ip from top to bottom, and not randomly ..
- but I don’t remember which host worked so smoothly, maybe this feature was not there?