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Field notes and methods on OpenShift, Kubernetes, automation and DevOps, drawn from production engagements.

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LinuxSecurity

Safe sudo: let a user manage one service without giving away root

How to write a sudoers rule that grants access to a single service (httpd) without opening a path to root: exact matching, the * trap, regex, NOEXEC and the pager.

Ismail Ait Zaid · October 31, 2026 · 7 min read
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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
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