Curious to learn more about why it is difficult to debug. I'm not familiar with service mesh. I also work at a large corp, but we use gateways and most things are event driven with kafka across domain boundaries. I spend most of my time debugging each service locally by injecting mock messages or objects. I do this one at a time if the problem is upstream. Usually, our logging helps us pinpoint the exact service at to target for debugging. It's really easy. Our devops infrastructure has built out patterns and libraries when teams need to mint a new service. Everything is standardized with terraform. Everything has the same standard swagger pages, everything is using okta, etc.. Seems a bit boring (which is good)
It's easy if Someone(tm) has already set up a system where you can whip up the relevant bits with something like localstack.
But if there is no support from anyone and you'll be starting from scratch, you've print-debugged and fixed the issue before you get the debugger attached to anything relevant.
I suppose in the description of "large corp" and service mesh, Someone would already exist and this would already have been worked out. It would be a nightmare dealing with hundreds of microservices without this kind of game plan.
