https://anishbista.org/tags/case-study/Recent content in Case-Study on Anish BistaHugoen-usSun, 24 May 2026 05:02:05 +0000https://anishbista.org/blog/how-rancher-saved-us-during-an-os-upgrade-in-an-air-gapped-environment/Sun, 24 May 2026 05:02:05 +0000https://anishbista.org/blog/how-rancher-saved-us-during-an-os-upgrade-in-an-air-gapped-environment/<blockquote> <p><em>Disclaimer: I am not an advocate of Rancher. Since it is open source, I hope sharing this won’t create any issues.</em></p></blockquote> <p><strong>The Setup</strong></p> <p>We had a running RKE1 clusters in an air-gapped environment (I know it’s EOL, but it’s the customer’s choice). We were in a pre-production environment with two clusters, each an HA setup with 3 masters and 15 workers. Both clusters were, luckily, imported into Rancher.</p> <p><strong>What Happened</strong></p>