Why not asking them during the interview process?

Have them "drive" you through the resolution of one of the issues that you expect could happen. See how they behave and what they try - they may not necessarily have the complete correct answer, but you will see if they know where to look, the basic concepts, and so on.

I've interviewed people capable of writing ansible scripts, but with no real ability to dive into issues and fix them and/or investigate what's broken. Many would not even tell me "we could just provision a new VM to replace the one that went down, right?"...