Context We have recently introduced the Istio service mesh in our Kubernetes clusters to take advantage of its traffic management, security and observability features. One of our key requirements is to enforce TLS/encryption on traffic in transit across all layers. Within the cluster, this is done via mTLS provided by Istio…

MongoDB comes with a change stream feature that enables applications to subscribe to streams of change events taking place inside MongoDB. The ability to receive data changes as events makes it simple for applications to implement use-cases that depend on the ability to react to such change events. One useful…

Apache Kafka is widely used in event-driven architectures for asynchronous, messaging-based integration between applications and services. Most use-cases deal with the consumption of messages as they are being produced. Once a message is successfully processed, consumers move on to newer messages, and don’t have to deal with the old ones…

Context MongoDB makes it easy to organize and store data in hierarchical document structures. However, fetching specific data that is embedded in nested subarrays of a deep hierarchical document can present a challenge, especially when you want to fetch only the data that you need from the database, and nothing more…