I was just about to suggest localstack. I use it religiously in personal projects; can't recommend it enough. I haven't started telling it to induce errors yet,

I was just about to suggest localstack. I use it religiously in personal projects; can't recommend it enough. I haven't started telling it to induce errors yet, but it definitely has that capability. And if you're running it in docker, some of the network stuff can be simulated that way as well.