Containers & K8s Case Studies

Real-world Containers & K8s case studies: what happened in production, the architecture behind it, the numbers and the lessons to take to your own team.

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  1. How a B2B SaaS Platform Halved Kubernetes Compute Costs with Karpenter and Right-Sized Workloads

    A 120-engineer SaaS company cut EKS compute spend by 52% in 90 days by replacing Cluster Autoscaler with Karpenter, enforcing VPA-driven right-sizing, and enabling consolidation. The lesson: most Kubernetes waste is invisible until you measure it.

    Containers & K8s · advanced · 12 min read

  2. How a B2B SaaS Platform Upgraded 40 Kubernetes Clusters Across Three Versions Without an Outage

    A 120-engineer SaaS company migrated 40 production Kubernetes clusters from 1.24 to 1.27 using a wave-based canary strategy, automated preflight checks, and zero customer-facing downtime.

    Containers & K8s · advanced · 12 min read

  3. How a B2B SaaS Team Migrated a Rails Monolith to EKS With Zero Downtime

    A 120-engineer SaaS company moved a decade-old Rails app from hand-managed EC2 to Amazon EKS using a strangler-fig approach, cutting deploy time from 47 minutes to 4 and eliminating weekend outages.

    Containers & K8s · intermediate · 12 min read

  4. How a New Telemetry Service Took Down OpenAI's Kubernetes API Servers and DNS in December 2024

    A new telemetry deployment in December 2024 overwhelmed OpenAI's Kubernetes API servers and DNS, causing a ~4-hour outage across ChatGPT, the API, and Sora.

    Containers & K8s · advanced · 12 min read

  5. How One Platform Team Tamed 30 Product Teams on a Single Kubernetes Cluster

    A B2B SaaS company's platform team built a multi-tenant Kubernetes platform using namespaces, Kyverno, and Crossplane, cutting provisioning time from days to minutes and halving incident rate.

    Containers & K8s · advanced · 12 min read

  6. The Pi Day Outage: How a Renamed Kubernetes Node Label Took Reddit Down for Five Hours

    A Kubernetes version upgrade silently renamed a built-in node label, breaking pod scheduling across Reddit's fleet and causing a five-hour site-wide outage on Pi Day 2023.

    Containers & K8s · intermediate · 12 min read