Benchmarking Apache Kafka, Kubernetes revisited (with Ceph)

It has been ages since I was introduced in Apache Kafka and read the post from linkedin Benchmarking Apache Kafka: 2 Million Writes Per Second (On Three Cheap Machines). At that time, the post wanted to show why the new messaging platform fitted the linkedin use cases with better performance than other traditional brokers. Now that new kubernetes workloads are on the picture and it is fairly simple to deploy a kafka cluster using operators like strimzi, I was tempted to try to repeat the scenarios from the original post in a kubernetes cluster.

Monitoring Spring Boot embedded Infinispan in Kubernetes

In previous article, we explanined how to develop a microservice in SpringBoot that uses infinispan as spring-cache implementation. We exposed the actuator prometheus endpoint to check in our local environment that it was running right. In this post, we are going to use the actuator endpoint to scrape it with prometheus and create a grafana dashboard to monitor the performance. Initial Set Up in kubernetes We assume that we have our microservice already deployed on your kubernetes namespace.

Why some prometheus alerts in k8s can confuse

Recently I was installing a kubernetes cluster as I usually do for my tests. However, as those machines were bare metal servers that some colleagues have recycled, we decided to keep it running and try to maintain it by ourselves. First thing I did was a simple bot to send the alerts to a telegram channel. That was something I did not do in the past, because I do not care about monitoring as my clusters were ephemeral.