Spotlight

Zero-Downtime EKS Migration of Alwayz (DAU 1.5M, MAU 3M) — A Hands-On DevOps Journey

Yonghyun Kim

This case study describes how the team migrated the Always service (1.5M DAU, 3M MAU) from EC2 to Amazon EKS in ~2 months with zero downtime, using a GitOps Bridge, gradual traffic cutover with Route53 weighted routing, and Helm + ArgoCD workflows.

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Tools and utilities

  • mcp-server-kubernetes – Kubernetes Management via MCP

    mcp-server-kubernetes exposes a complete Kubernetes management layer via Model Context Protocol (MCP), letting tools like Claude Desktop and mcp-chat run kubectl and Helm commands securely.

  • Auto-generate Kubernetes CRDs/Controllers from OpenAPI Specs

    This controller takes an OpenAPI (OAS 3.0/3.1) spec and a user-defined RestDefinition, then automatically generates CRDs and REST controllers to let you manage external APIs as Kubernetes resources.

  • K8s cleaner

    K8s cleaner is a controller that identifies, removes, or updates stale/orphaned or unhealthy resources to maintain a clean and efficient Kubernetes cluster.

  • KubeFTP-Proxy Helm Chart

    This Helm chart deploys a passive-mode FTP server (vsftpd) in Kubernetes using NodePort and auto-generates HAProxy configuration for proper Passive FTP/FTPS support across nodes.

  • Helmper – Helm Charts and Image Registry Manager

    helmper is a Go program that reads Helm Charts from remote OCI registries and pushes the charts container images to your registries with optional OS-level vulnerability patching.

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    • Salary: $120K to $175K a year

    • Location: based in the office in Whippany, NJ, USA

    • Tech stack: Kubernetes, Docker, Go, Python

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    • Salary: $170K to $200K a year

    • Location: remote from the United States

    • Tech stack: Kubernetes, GCP, Helm, ArgoCD, Go, Shell, Python, Typescript, Terraform, Jenkins

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