Engineering Circatree.com

1. Infrastructure as code

   1. Gitlab CI + Terraform state

   2. Terraform - plan, apply, destroy

      1. Kubernetes - clusters + core cluster services

         1. Minimal base environment

2. Kubernetes

   1. Everything is Kubernetes-native - extending the k8s API

   2. Most resources are managed outside Terraform

   3. ArgoCD - syncs manifests from Git and reconciles desired state

   4. Crossplane - provides Developer API to org resources

      1. Abstracts away the cloud-managed and in-cluster resources

      2. Expands a simple manifest in to Kubernetes objects

         1. Each object has events, lifecycle, reconciliation loop

   5. Policy as code

      1. API admission webhooks enforced by Kyverno

3. GitOps

4. CI/CD

5. Logging, Monitoring & Alerting

6. Metrics, Tracing & Profiling

Composite Resources

From https://docs.crossplane.io/latest/concepts/compositions/:

Compositions are a template for creating multiple managed resources as a single object.

A Composition composes individual managed resources together into a larger, reusable, solution.

An example Composition may combine a virtual machine, storage resources and networking policies. A Composition template links all these individual resources together.