Getting ready to issue IP address certificates

I can see how this would work on a technical level but what's the intended use case?

Sometimes you want to have valid certs while your dns is undergoing major redesign. For instance to keep your dashboards available, or to be triple sure no old automation will fail due to dns issues.

In other cases dns is just not needed at all. You might prefer simplicity, independence from dns propagation, so you will have your, say, Cockpit exposed instantly on a test env.

Only our imagination limits us here.

So go to keys-are-names.

There's no reason AT ALL to bring IP addresses into the mix.