Revisiting the Blog Application

As we already discussed the Blog App in the last chapter, let’s look at the services and their interactions again in the following diagram:

Figure 13.2 – The Blog App services and interactions

We’ve already created CI and CD pipelines for building, testing, and pushing our Blog Application microservices containers using GitHub Actions and deploying them using Argo CD in a GKE cluster.

If you remember, we created the following resources for the application to run seamlessly:

• MongoDB – We deployed an auth-enabled MongoDB database with root credentials. The credentials were injected via environment variables sourced from a Kubernetes Secret resource. To persist our database data, we created a PersistentVolume mounted to the container, which we provisioned dynamically using a PersistentVolumeClaim. As the container is stateful, we used a StatefulSet to manage it and, therefore, a headless...