Internal microservice authentication is a critical component of software development. It ensures that only authorized users and services can access sensitive information and perform actions within a system. With the rise of microservices architecture and the increasing complexity of modern software ecosystems, implementing effective authentication mechanisms for internal microservices has become more important than ever.

This blog post is about testing microservices and distributed systems with JMeter. It will focus on the principles of performance testing applications that are architected this way. We will not look at which JMeter samplers to use in order to generate a load against microservices or how to configure these samplers. This post will consider best practise and consideration in designing your performance testing when faced with these applications.