kubernetes
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Resolving ImagePullBackOff with Registry Authentication Issues
Encountering an ImagePullBackOff error in Kubernetes can be a frustrating experience, especially when it’s due to a 401 error from a Docker Registry. This guide will walk you through the steps to diagnose and resolve this issue by updating your registry credentials. Diagnosing the ImagePullBackOff Error When a pod fails to pull an image, it…
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Quick-tip: using kubectl when you manage multiple Kubernetes clusters
Kubectl has this great feature of ‘contexts’ which allow you to switch between clusters or even namespaces within a cluster. But how do you go about adding contexts to your version of kubectl? I have used the KUBECONFIG environment variable to specify the location of a custom kubeconfig.yaml file; what I recently discovered was that…
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Kubernetes: Unexpected 502 errors when rolling out a new ReplicaSet
The other day I was working on migrating a platform at a client from Virtual Machine based deployments using Ansible to Container-based deployments using Kubernetes. The whole migration went smooth until we started noticing Bad Gateway (HTTP status 502) errors during load testing. At first we thought that the readiness probes were misconfigured and that…