Summary
In this chapter, we learned how both monoliths and microservices run in Istio. We explored why and when to use each approach. We deployed a monolith, taking care to ensure our monolith's session management worked. We then moved into deploying microservices, authenticating requests, authorizing requests, and finally how services can securely communicate. To wrap things up, we discussed whether an API gateway is still necessary when using Istio.
Istio can be complex, but when used properly it can provide considerable power. What we didn't cover in this chapter is how to build containers and manage the deployment of our services. We're going to tackle that next in Chapter 14, Provisioning a Platform.
