Spotlight

The Complete OpenSSL & TLS Debugging Guide: From Root CA to Kubernetes

Amolpratap Singh

This tutorial explains TLS and certificate debugging from root CA basics to Kubernetes secrets, with OpenSSL and curl commands for inspecting certs, validating handshakes, and fixing common production errors.

More articles →

Tools and utilities

  • Node Healthcheck Operator

    Node Healthcheck Operator automatically detects unhealthy nodes and triggers pluggable remediators like BMC, ClusterAPI, or software reboots to recover workloads without manual intervention.

  • eks-up

    eksup analyzes your EKS cluster and generates a step-by-step upgrade playbook, flagging deprecated APIs, add-on version mismatches, and node group issues before you upgrade.

  • Clabernetes: Containerlab in Kubernetes

    Clabernetes is a Kubernetes controller that deploys valid containerlab topologies into a Kubernetes cluster, effectively bringing containerlab workflows into a distributed Kubernetes environment.

  • k8sgpt: Kubernetes analyzer

    K8sgpt is a tool that scans Kubernetes clusters, diagnoses, and triages issues in simple English.

  • k10s

    k10s is a terminal dashboard for watching multiple Kubernetes clusters at once, with side-by-side views, health signals, warnings, and recent logs in one screen.

More projects →

Events starting soon

Discover more events onn Kube Events →

The Namespaces Scaling Trap
The Namespaces Scaling Trap

Most teams scale Kubernetes by thinking about pods and nodes. At Render, Brian Stack ran into a different dimension: hundreds of thousands of namespaces per cluster, multiplied across DaemonSets that list-watch every namespace.

Brian explains how Render traced the issue through Calico and Vector, worked with upstream maintainers, and turned memory profiling into operational wins: lower node costs, lighter API-server load, and faster rollouts.

In this interview:

  • Why namespaces can become a hidden scaling bottleneck
  • How DaemonSets multiply memory and control-plane pressure
  • How profiling, staging clusters, and upstream collaboration freed 7 TiB
  • Why pushing from an 80% fix to a complete fix can make teams faster

Learn from production

More case studies →

Matching jobs

    • Software Engineer with iFood

    • Salary: $30.24K to $247.5K a year

    • Location: remote from

    • Tech stack: Kubernetes, AWS, Docker, Go, Kotlin, SQL, RabbitMQ, Kafka

    • Data Engineer with Filevine

    • Salary: $18K to $297.88K a year

    • Location: remote from

    • Tech stack: Kubernetes, AWS, Azure, GCP, Docker, C#, Python, SQL, Snowflake, Airflow

    • Data Engineer with Firmus Technologies

    • Salary: US$88.2K to US$286K a year

    • Location: based in the office in Singapore, SG

    • Tech stack: Kubernetes, AWS, Azure, GCP, Helm, Python, SQL, Snowflake, Kafka, Airflow

    • Head Of Engineering with Cyara

    • Salary: $185.4K to $385K a year

    • Location: remote from

    • Tech stack: Kubernetes, AWS, Docker

Discover more Kubernetes jobs on Kube Careers →

Subscribe to Learn Kubernetes Weekly

Trusted by 77K engineers. Delivered 183 issues and counting.

or subscribe via

Build something

More tutorials →

Call for Papers closing soon

  1. 0

    days

    Kubernetes Community Days Lima 2026

    The Call For Paper is open until 19 May 2026 at GMT-4. More info →
    • Location: Lima, PE

    • In-person conference organized by KCD Lima, Perú.

    • The conference starts on the 18 July 2026.

    • Apply here
  2. 6

    days

    DebConf26

    The Call For Paper is open until 25 May 2026 at GMT-4. More info →
    • Location: Santa Fe, AR and virtual

    • Online & in-person conference organized by Debian Argentina community.

    • The conference starts on the 20 July 2026.

    • Apply here
  3. 12

    days

    DevOpsDays Istanbul 2026

    The Call For Paper is open until 31 May 2026 at GMT-4. More info →
    • Location: Istanbul, TR

    • In-person conference organized by DevOps Turkey.

    • The conference starts on the 29 September 2026.

    • Apply here
  4. 12

    days

    DevOps Midwest 2026

    The Call For Paper is open until 31 May 2026 at GMT-4. More info →
    • Location: St. Louis, MO, USA

    • In-person conference organized by Sketch.

    • The conference starts on the 22 August 2026.

    • Apply here
  5. 13

    days

    KubeCon + CloudNativeCon North America 2026

    The Call For Paper is open until 1 June 2026 at GMT-4. More info →
    • Location: Los Angeles, CA, USA

    • In-person conference organized by Linux Foundation.

    • The conference starts on the 26 October 2026.

    • Apply here
  6. 13

    days

    Heapcon 2026

    The Call For Paper is open until 1 June 2026 at GMT-4. More info →
    • Location: Belgrade, RS

    • In-person conference organized by heapspace.

    • The conference starts on the 6 November 2026.

    • Apply here
  7. 13

    days

    Cloud Native Days Norway

    The Call For Paper is open until 1 June 2026 at GMT-4. More info →
    • Location: Bergen, NO

    • In-person conference organized by CND Norway.

    • The conference starts on the 27 October 2026.

    • Apply here

Thanks to our sponsors who make Kube Today possible

Find out more about being a sponsor →

More articles

Even more articles →