Overview
Some may not consider a traditional three-tier architecture consisting of a load balancer, a managed instance group (MIG) of virtual machines as the application layer, and Cloud SQL for the database tier a cloud-native architecture. Yet, it is still a pervasive architecture and a good starting point to apply the concepts we have learned about so far. Figure 6.1 shows the diagram of the architecture that we will provision in this chapter:
Figure 6.1 – Three-tier architecture
Following Google Cloud best practices, we use a custom VPC with minimal subnets and firewall rules. As we are catering to HTTP traffic, we are utilizing a global load balancer, which acts as the entry point and direct traffic to virtual machines that host our application code.
We deploy the virtual machines (compute engine) in a MIG to allow scaling. For the database tier, we create a Cloud SQL instance and use Secret Manager to store the connection information, which...
