Kubernetes Basics

Kubernetes Basics

Installing kubectl in linux

• curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.7.0/bin/linux/amd64/kubectl
• chmod +x ./kubectl
• sudo mv ./kubectl /usr/local/bin/kubectl

Note  Windows users can follow this link https://kubernetes.io/docs/tasks/tools/install-kubectl/

Configure k8s cluster for CLI

• Create .kube folder in your home folder.
• store your private key in .kube folder and name it as config

you can get the config files from AIL drive.

Accessing k8s cluster

• kubectl cluster-info

Get the nodes (minions) list

• kubectl get nodes

Get the deployment lists in k8s

• kubectl get deployment

Get the pods list

• kubectl get pods

Get the replication controller list

• kubectl get rc

Describe pod 

• kubectl describe pod zatanna-2918509718-6aty9

Get the service list

• kubectl get svc

Some times you are not able to view the entire endpoint URL. Use the below one to get the entire URL.

• kubectl get svc -o wide

you can use -o wide to get the wide view of the output.

Describe service 

• kubectl describe svc zatanna

Get logs from pod

• kubectl logs zatanna-2918509718-6aty9

follow the logs

• kubectl logs -f zatanna-2918509718-6aty9

Login to the pod

• kubectl exec -it zatanna-2918509718-6aty9 /bin/bash

Get the pod resource utilization

• kubectl top pod zatanna-2918509718-6aty9

Deploy a new service in kubernetes

• kubectl create -f nginx.yaml