Get insight into a Linux machine using Cockpit

Cockpit is an interactive Linux server admin interface. You can use it to monitor/ manage a Linux node through a web browser.

Install Cockpit on the Linux machine

yum install cockpit -y

systemctl start cockpit

systemctl enable --now cockpit.socket

Kubernetes 101 - Part2 - Basic operations

In this article, I will walk you through basic kubectl commands for working with K8s clusters.

kubectl cluster-info

kubectl version --short

kubectl get namespaces

kubectl get nodes -o wide

kubectl get pods -o wide --all-namespaces

kubectl get pods --show-labels

kubectl get nodes --show-labels

Deploy a pod

Following is a sample yaml file for deploying a CentOS pod:

apiVersion: v1

kind: Pod

metadata:

 name: centos-pod

 labels:

  zone: test

  version: v1

spec:

 containers:

 - name: centos-pod

   image: centos:latest

   command: ["sleep"]

   args: ["1d"]

 nodeSelector:

    kubernetes.io/hostname: w2

To deploy the pod:

kubectl create -f centos-pod.yml

kubectl describe pod centos-pod

SSH into the pod:

kubectl exec -it centos-pod sh

kubectl delete pod centos-pod

Hope it was useful. Cheers!