Summary

In this chapter, we learned step by step how to create a new EKS cluster in AWS and bootstrapped it in an instrumented manner by covering Argo CD, learning how to use an Argo CD app to manage itself, External DNS, the Istio operator, the Istio control plane, and the Argo CD Istio ingress.

The full code can be found at https://github.com/PacktPublishing/ArgoCD-in-Practice in the ch05 folder. We gained a better understanding of sync waves in a real scenario that we can apply to our day-to-day work operations. In the end, we learned about the new custom health checks that, through a simple Lua programming script, can give us the power to validate when a resource is really ready.

In the next chapter, we will see how we can adopt Argo CD in a CI/CD workflow, tackle the security challenges with Secrets, and coordinate a real scenario of microservice deployments with Argo Rollouts.