What's the big deal with service meshes? Think of them as SDN at Layer 7

A technical yet demystifying dive into networking tech you now can't avoid

Systems Approach  I remember when I first heard about Service Meshes in 2017, and wondering what the big deal was. Building cloud applications as a graph of microservices was commonplace, and telcos were hard at work inventing yet other ways to chain together virtualized network functions. Service graphs, service chains, service meshes… how many ways do we really need to talk about composing complex systems from a collection of smaller components?…

from The Register