Thread by @NaveenS16

Kubernetes Hacks and Tricks — #1 Immutable ConfigMaps & Secrets

#Kubernetes ConfigMap & Secret resources have a field called immutable which, if set to true, ensures that the data of ConfigMap/Secret cannot be updated after resource is created.

👀itnext.io/kubernetes-hac… #DevOps

#Kubernetes Hacks and Tricks — #2 Optional ConfigMaps & Secrets in Pods

In some apps, app configs are set by default in the codebase (hard-coded) and if you want to override them, you can provide your override values via environment variables

👀itnext.io/kubernetes-hac… #DevOps

Kubernetes Hacks and Tricks — #3 List all downloaded images on worker nodes

👀itnext.io/kubernetes-hac… #Kubernetes #DevOps

#Kubernetes Hacks and Tricks — #4 Find worker node info from Pod spec info

In access-limited clusters where you don’t have access to cluster resources, you may need worker nodes’ info like worker node name, node IP address, etc.

👀itnext.io/kubernetes-hac… #DevOps

#Kubernetes Hacks and Tricks — #5 Pod DNS Policy and DNS Config options

What really is dnsPolicy in Pod spec, and when should we change it? By setting the dnsPolicy option in Pod spec, you define how DNS requests should be resolved.

👀itnext.io/kubernetes-hac… #DevOps

#Kubernetes Hacks & Tricks — #6 Find Pods running from deprecated registry

K8s changed its main repository from k8s.gcr.(io) to registry.k8s.i(o), so you should update your manifests ASAP. Learn how to find running Pods using the legacy image registry.

👀itnext.io/kubernetes-hac…