Why We Dropped Docker: A Full Production Migration to Containerd

This article recounts how our team, after repeated Docker daemon failures on a 500‑node Kubernetes cluster, performed a zero‑downtime migration to Containerd, detailing architectural differences, preparation steps, migration procedures, performance benchmarks, post‑migration adjustments, common pitfalls, and best practices for large‑scale production environments.

Docker migrationKubernetescontainerd

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Why We Dropped Docker: A Full Production Migration to Containerd

Full-Stack DevOps & Kubernetes

Jul 15, 2022 · Cloud Native

Step‑by‑Step Guide to Migrate Kubernetes Nodes from Docker to containerd

This tutorial walks through migrating a two‑node Kubernetes cluster (master and worker) from Docker to containerd on CentOS 7, covering environment setup, node draining, Docker removal, containerd installation and configuration, kubelet adjustments, uncordoning, and verification of the new container runtime.

DevOpsDocker migrationKubernetes

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Step‑by‑Step Guide to Migrate Kubernetes Nodes from Docker to containerd

Efficient Ops

Jun 6, 2022 · Cloud Native

How to Migrate Kubernetes from Docker to cri‑o: Step‑by‑Step Guide

This guide explains why Kubernetes dropped dockershim, clarifies OCI and CRI standards, compares Docker, containerd and cri‑o runtimes, and provides a step‑by‑step procedure—including node draining, Docker removal, kernel tuning, cri‑o installation, kubelet reconfiguration, and verification—to successfully migrate a cluster from Docker to cri‑o before upgrading to version 1.24.

CRI-ODevOpsDocker migration

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How to Migrate Kubernetes from Docker to cri‑o: Step‑by‑Step Guide