Microservices Design Patterns in .NET by Trevoir Williams

Author:Trevoir Williams
Language: eng
Format: epub
Publisher: Packt
Published: 2023-10-15T00:00:00+00:00

Summary

The contents of this chapter help us to be more mindful of the potential for failures in our microservices application. These concepts help us not only construct powerful and stable web services but also supercharge the communication mechanisms that exist between them.

We see that service outages are not always due to faulty code or the database and server of the initial web service, but we are facilitating inter-service communication as well, which leads to greater dependence on the network, third-party service, and general infrastructure uptime. This leads down a path where we implement contingencies that assist in ensuring that our application gives our users as good an experience as possible.

We looked at several techniques for increasing service reliability, such as using a caching layer with technology such as Redis Cache for our GET operations, a message broker for our write operations, and writing more foolproof code using frameworks such as Polly. With Polly, we looked at how we can automatically retry service calls and use a circuit breaker to prevent these retries from being too liberal and causing other problems.

Since services fail and we need a retry method, we also need a way to monitor the health of the services so that we can be aware of why the retries are not effective. This means that we need to introduce health checks that alert us to outages in a service’s infrastructure. We will explore this in the next chapter.

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