Spotlight

Freezing Spark Drivers to Zero Resources and Waking Them in 300 Milliseconds

rammi-dev

This article explains how Spark Connect, CRIU, and ZeroPod can freeze idle Spark drivers to near-zero resources and restore full session state in about 300 milliseconds on Kubernetes.

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Tools and utilities

  • 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.

  • KubeDiagrams

    KubeDiagrams is a tool that automatically generates visual architecture diagrams from Kubernetes manifests, Helm charts, and live clusters.

  • H8s (Homernetes)

    H8s is a home infrastructure project combining Kubernetes with Talos OS security, running on 2 N100 mini PCs with GitOps deployment via ArgoCD.

  • Nelm: Helm replacement

    Nelm is meant to be a direct replacement for Helm 3, providing first-class Helm chart support yet improving on what Helm 3 offers.

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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

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Matching jobs

    • DevOps Engineer with Epic Kids Inc.

    • Salary: $90 to $484K a year

    • Location: remote from

    • Tech stack: Kubernetes, GCP, Helm, ArgoCD, Docker, Python, Airflow, Terraform, GitHub Actions, Jenkins

    • DevOps Engineer with Prime Intellect

    • Salary: $150K to $300K a year

    • Location: based in the office (and remote from home) in San Francisco, CA, USA

    • Tech stack: Kubernetes, GCP, Go, Python, Rust, Typescript, Terraform, Ansible, Grafana, Prometheus

    • DevOps Engineer with TMS LLC

    • Salary: $85 a day

    • Location: remote from

    • Tech stack: Kubernetes, Azure, Terraform, Azure DevOps

    • DevSecOps Engineer with CHAOS Industries

    • Salary: $140K to $220K a year

    • Location: based in the office in Hawthorne, CA, USA

    • Tech stack: Kubernetes, Azure, On-premise, Docker, C++, Go, Java, Python, Rust, Azure DevOps

    • DevSecOps Engineer with PactFi

    • Salary: $12.6K to $445.5K a year

    • Location: based in the office in New York, NY, USA

    • Tech stack: Kubernetes, AWS, Docker, Python, Redis, Pulumi, Terraform, Jenkins

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    • In-person conference organized by Devopsdays.

    • The conference starts on the 22 September 2026.

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    Michigan Technology Conference 2026

    The Call For Paper is open until 16 May 2026 at GMT-4. More info →
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    • In-person conference organized by The Michigan Technology Conference Association.

    • The conference starts on the 30 October 2026.

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    The Call For Paper is open until 17 May 2026 at GMT-4. More info →
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    • In-person conference organized by TechEx Events.

    • The conference starts on the 19 May 2026.

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    • In-person conference organized by Devopsdays.

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    • In-person conference organized by Devopsdays.

    • The conference starts on the 15 August 2026.

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    • The conference starts on the 18 July 2026.

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