Kubernetes/Tools

kubectl

Install

#Latest
curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl

#Specific version
$(VER=v1.13.7; ARCH=amd64; curl -LO https://storage.googleapis.com/kubernetes-release/release/$VER/bin/linux/$ARCH/kubectl)
chmod +x ./kubectl; sudo mv ./kubectl /usr/local/bin/kubectl

#Verify, kubectl should not be more than -/+ 1 minor version difference then api-server
kubectl version --short 
Client Version: v1.13.7
Server Version: v1.13.7-gke.8

#Autocompletion
source <(kubectl completion bash); alias k=kubectl; complete -F __start_kubectl k

Help

$ kubectl --help
$ kubectl get --help
$ kubectl explain --help
$ kubectl explain pod.spec.containers #kubectl knows cluster version, so gives you correct schema details

Stern

Log tailing and landscape viewing tool

References

• kubectl overview - resources types, Namespaced, kinds K8s docs
• kubetail Bash script that enables you to aggregate (tail/follow) logs from multiple pods into one stream. This is the same as running "kubectl logs -f " but for multiple pods.
• kubectx kubens Kubernetes config switches for context and setting up default namespace
• manages different ver kubectl blog
• kubectl Kubectl Conventions