I have set up my name server and set the glue records. It's working.
However, I'm not sure if I have everything properly to spec. For example, I currently have a glue record set for ns1.mydomain.example set to 192.0.2.4.
Now, for the authoritative server for mydomain.example, I do NOT have an A record for ns1.mydomain.example pointing to 192.0.2.4, nor do I have an NS record for the similar entry.
Should I? I feel like that's unnecessary duplication, but I'm also pretty sure I'm missing something since dig ns1.mydomain.example doesn't work, but it does work for other name servers I've tested.
To clarify, I'm asking for best practice. Like I said, it's working, so I'm hesitant to change it unless it's not up to the expected standard.
Yes, you need the "redundant" NS and A/AAAA records in your zone. Glue records are only used by resolvers to find the authoritative name servers for a zone, they aren't used as authoritative answers (because glue records aren't authoritative, they're just hints in the right direction).