Spotlight

The feedback loops behind Kubernetes

Fatih Arslan

This article explains Kubernetes operators as feedback controllers, connecting reconciliation, informers, queues, spec/status, and self-healing behavior to database operations.

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Tools and utilities

  • Yoke: WASM IaC deployer

    Yoke is an IaC tool inspired by Helm that leverages WebAssembly and Go to dynamically deploy Kubernetes packages with executable runtime capabilities.

  • kubectl-find: find plugin

    This tool gives you a find-like experience for Kubernetes resources, letting you search by name regex, age, labels, status, image name or node, then patch, exec or delete the matching items.

  • Agent Substrate: Kubernetes runtime for stateful agents

    Agent Substrate is a Kubernetes runtime for stateful agents that packs many mostly idle agents onto a few worker pods while keeping each agent's memory, filesystem state and routing intact.

  • Dynamo ModelExpress: model weight management for LLM inference

    ModelExpress is an NVIDIA service that manages model weights across a cluster, caching them and moving them GPU-to-GPU over RDMA instead of reloading from storage, so new vLLM or Dynamo pods start serving much sooner.

  • KSolver: Kubernetes cost optimizer

    KSolver is a Kubernetes cost optimizer that uses CP-SAT constraint programming to find cheaper node fleets, explain blockers, simulate changes, and rank safe savings actions.

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Automating Pod Disruption Budgets with Kyverno
Automating Pod Disruption Budgets with Kyverno

Karpenter can reduce Kubernetes infrastructure costs, but aggressive node consolidation can also expose workloads that lack disruption safeguards.

Ahmad Asmar explains how Zencity uses Kyverno to automatically generate Pod Disruption Budgets, while accounting for existing PDBs, percentage-based availability targets, single-replica workloads, and environment-specific policies.

In this interview:

  • How Karpenter consolidation changes the availability risks of cluster operations
  • Why Kyverno's generated policies can provide safer defaults than manual enforcement
  • How to handle duplicate PDBs, scaling workloads, and single-replica edge cases
  • How aggregated ClusterRoles keep custom permissions separate from Helm-managed resources

Learn from production

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Matching jobs

    • DevOps Engineer with Mark43

    • Salary: $155K to $170K a year

    • Location: remote from

    • Tech stack: Kubernetes, Docker, Terraform

    • DevOps Engineer with RobCo

    • Salary: US$70.74K to US$440K a year

    • Location: based in the office in Munich, DE

    • Tech stack: Kubernetes, AWS, Go, Python, Terraform, Datadog, Grafana, Prometheus

    • Site Reliability Engineer with MyFitnessPal

    • Salary: $120K to $165K a year

    • Location: remote from

    • Tech stack: Kubernetes, AWS, Docker, Go, Python, Typescript, Terraform, GitHub Actions, Datadog

    • AI Enterprise Technical Program Manager with Redhorse Corporation

    • Salary: $37 to $485.65K a year

    • Location: based in the office in Arlington, VA, USA

    • Tech stack: Kubernetes, AWS, Azure, Docker, Spark

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Call for Papers closing soon

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    days

    Cloud Security Space 2026

    The Call For Paper is open until 15 August 2026 at GMT-4. More info →
    • Location: Buenos Aires, AR

    • In-person conference organized by Cloud Security Space.

    • The conference starts on the 9 October 2026.

    • Apply here
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    Kubernetes Community Days Suisse Romande 2026

    The Call For Paper is open until 16 August 2026 at GMT-4. More info →
    • Location: Geneva, CH

    • In-person conference organized by KCD Suisse Romande.

    • The conference starts on the 9 December 2026.

    • Apply here
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    Devopsdays Juiz de Fora

    The Call For Paper is open until 23 August 2026 at GMT-4. More info →
    • Location: Juiz de Fora, BR

    • In-person conference organized by Devopsdays.

    • The conference starts on the 17 October 2026.

    • Apply here
  4. 10

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    ONE Summit Japan

    The Call For Paper is open until 24 August 2026 at GMT-4. More info →
    • Location: Tokyo, JP

    • In-person conference organized by CNCF.

    • The conference starts on the 11 December 2026.

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    Monster Scale Summit 2027

    The Call For Paper is open until 28 August 2026 at GMT-4. More info →
    • This is a virtual event

    • Online conference organized by ScyllaDB.

    • The conference starts on the 11 March 2027.

    • Apply here
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    Devopsdays Warsaw

    The Call For Paper is open until 30 August 2026 at GMT-4. More info →
    • Location: Warsaw, PL

    • In-person conference organized by Devopsdays.

    • The conference starts on the 23 November 2026.

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    Devopsdays Recife

    The Call For Paper is open until 30 August 2026 at GMT-4. More info →
    • Location: Recife, BR

    • In-person conference organized by Devopsdays.

    • The conference starts on the 12 December 2026.

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