🛠️ 2025-10-25 Tech Update Summary

🔹 Kubernetes - 7 Common Kubernetes Pitfalls (and How I Learned to Avoid Them)

The blog post titled “7 Common Kubernetes Pitfalls (and How I Learned to Avoid Them)” discusses common mistakes encountered when using Kubernetes and provides tips on how to avoid them. The author shares personal experiences and insights to help others navigate these challenges effectively. The key pitfalls include:

  1. Skipping Resource Requests and Limits: Neglecting to specify CPU and memory requirements can lead to resource starvation or hoarding, affecting performance and stability. To avoid this, start with modest resource requests, monitor usage, and adjust as needed.

  2. Underestimating Liveness and Readiness Probes: Not defining health checks for containers can result in unresponsive applications. Implement simple liveness and readiness probes to ensure containers are functioning correctly.

  3. Relying Solely on Container Logs: Using only kubectl logs is insufficient as logs can be lost upon container deletion. Centralize logs with tools like Fluentd or Fluent Bit for better monitoring and analysis.

  4. Treating Dev and Prod Environments the Same: Using identical settings across environments can lead to issues due to differing resource needs. Customize configurations using tools like kustomize and plan for scaling in production.

  5. Leaving Old Resources in the Cluster: Outdated resources consume resources and increase costs. Label resources, audit regularly, and use policy automation to manage lifecycle and cleanup.

  6. Diving Too Deep into Networking Too Soon: Introducing advanced networking solutions early can complicate troubleshooting. Start with basic networking, understand core concepts, and scale up as needed.

  7. Going Too Light on Security and RBAC: Insecure configurations pose risks. Use RBAC for permissions, pin images to specific versions, and enforce security policies like Pod Security Admission.

The author emphasizes learning from mistakes and leveraging community resources like official Kubernetes documentation and community Slack for further exploration. 👉 Read more

🔹 Spring Boot - Spring Shell 4.0.0-M1 is available!

The blog post announces the release of the first milestone of Spring Shell 4.0.0-M1, which is now available on Maven Central. This release aims to modernize Spring Shell and align it with Spring Framework 7 and Spring Boot 4. Spring Shell 4.0.0-M1 is based on Spring Framework 7.0.0-RC2 and Spring Boot 4.0.0-RC1. The general availability (GA) release of Spring Shell 4.0 is planned for November, following the Spring Boot 4.0 GA release. Upcoming changes include migrating nullability annotations to jSpecify, improving project modularity, updating test infrastructure to JUnit 6, enhancing build and release processes, and improving documentation. The post also thanks contributors and invites feedback on GitHub Issues and Discussions. 👉 Read more

🔹 Docker - Docker Hub Incident Report – October 20, 2025

The blog post discusses a major disruption to Docker services caused by an outage in AWS’s US-East-1 region on October 20, 2025. This incident affected developers globally who depend on Docker for their workflows. The post aims to offer transparency about the incident by explaining what occurred, the lessons learned, and the measures Docker is implementing to enhance their system’s resilience. 👉 Read more

🔹 Java - NUMA-Aware Relocation in ZGC

The blog post discusses the recent addition of NUMA-aware relocation to ZGC, a garbage collector in OpenJDK. This feature is scheduled for release in JDK 26 and is introduced through JDK-8359683. It builds on previous improvements to memory allocation, enhancing NUMA support and optimization in ZGC. 👉 Read more

🔹 Golang - Flight Recorder in Go 1.25

The blog post discusses the introduction of a new diagnostic tool in Go 1.25 called “flight recording.” This tool is designed to help developers capture detailed runtime information, which can be useful for diagnosing issues in Go programs. Flight recording allows for continuous recording and provides insights into the program’s behavior, making it easier to identify and resolve performance bottlenecks and other problems. The post likely provides details on how to use this tool effectively and its potential benefits for Go developers. 👉 Read more

🔹 Helm - Helm Turns 10

The blog post titled “Helm Turns 10” celebrates the 10th anniversary of Helm, a package manager for Kubernetes. Helm was created during a hackathon shortly after the release of Kubernetes 1.1.0. The first commit of Helm, authored by Matt Butcher on October 19, 2015, can be found in the helm-classic Git repository. Originally, Helm was developed independently before merging with Deployment Manager and becoming part of the Kubernetes project. The post highlights Helm’s journey and contributions to the Kubernetes ecosystem over the past decade. 👉 Read more