Yes, they can coexist thanks to CloudNativePG, the PostgreSQL Operator for Kubernetes. Furthermore, if you want to try before you buy you can, thanks to the new learning environment, CNPG Playground. https://www.i-programmer.info/news/84-database/17555-postgres-and-kubernetes-together-in-harmony.html
Zuplo has launched a new suite of tools that rates the quality of your API, based on its OpenAPI specification. We put it through its paces. https://www.i-programmer.info/news/90-tools/17550-check-your-apis-with-zuplos-rate-my-openapi.html