Kubernetes Operations

Internal

• Kubernetes

Subjects

• kubectl
• kubeadm
• kustomize
• Namespace Operations
• Pod Operations
• Secrets Operations

Runtimes

• Docker Desktop Kubernetes Support
• minikube

To Redistribute

Get the Manifest for an Existing Object

The manifest can be used to recreate the object:

kubectl get pod pod-name --export -o yaml

Note that --export is deprecated and will be removed in the future so find an equivalent.

Kill Immediately

kubectl delete -n my-ns pod my-pod --force --grace-period=0

Logging

"Tail" logging:

kubectl -n my-namespace logs -f my-pod

Logging that survives pod restart:

while ! kubectl -n my-namespace logs -f my-pod; do sleep 1; done

Port Fowarding

 while ! kubectl -n my-namespace port-forward service/my-service 8787:8787; do sleep 1; done

Get an Individual Attribute Only

https://gist.github.com/so0k/42313dbb3b547a0f51a547bb968696ba

kubectl ... -o jsonpath="{.status.phase}"

kubectl ... -o jsonpath="{.items[?(@.spec.unschedulable)].metadata.name}"