Home / Blog / DevOps

DevOps articles

CI/CD, GitOps, Argo CD, Jenkins, GitLab: how to ship faster and more safely to production.

Browse by topic

OpenShiftKubernetesDevOps

Migrating from OpenShift 3 to OpenShift 4: a step-by-step method

Why you can't upgrade OpenShift 3 to 4 in place, and how to migrate workloads cleanly: inventory, target cluster, MTC, GitOps, migration waves and cutover.

Ismail Ait Zaid · October 16, 2026 · 8 min read
Read the article →

Go further

DiscoverAzure DevOps trainingCI/CD pipelines, Repos, Boards and deployments on Azure.
Newsletter

One Cloud & DevOps tip a month

OpenShift, Kubernetes, Terraform, security: one practical tip from the field, straight to your inbox. No spam.