There’s a way of thinking in devops, to treat your servers as cattle, not pets. There’s also a related idea of immutable servers. For us old school people who love our servers like our children, all this sounds very weird. But before going to why this is weird, let’s take a look at those thoughts. A pet is an animal you keep and cuddle, maintain and take to the vet, take out for walkies and love like a family member.