Tej-Singh-Rana

CKAD
Core Concepts (13%)
kubectl create namespace mynamespace
kubectl run nginx --image=nginx --restart=Never -n mynamespace
kubectl run nginx --image=nginx --restart=Never --dry-run -o yaml > myfile.yaml
kubectl run busybox --image=busybox --command --restart=Never -it -- env   #withoutput
kubectl run busybox --image=busybox --command --restart=Never -- env #with
kubectl logs busybox
kubectl run busybox --image=busybox --restart=Never -o yaml --dry-run --command env > myfile.yaml
kubectl apply -f myfile.yaml

Tej-Singh-Rana

##################### Master Node ##################################################
# Set the hostname
$ hostnamectl set-hostname <enter-hostname>

# To get effect in the system without reboot, run the following command:
$ exec bash

# Do entry in the /etc/hosts for master and worker nodes to identify by it's hostname.
e.g. echo "172.16.238.10     master"  >> /etc/hosts
     echo "172.16.238.11     worker01"  >> /etc/hosts

Tej-Singh-Rana

Tools

• Kops https://github.com/kubernetes/kops/blob/master/docs/README.md
• Kubectl https://kubernetes.io/docs/tasks/tools/install-kubectl/
• kubespy https://blog.pulumi.com/kubespy-trace-a-real-time-view-into-the-heart-of-a-kubernetes-service
• kops https://icicimov.github.io/blog/virtualization/Kubernetes-Cluster-in-AWS-with-Kops/

Presentations

Tej-Singh-Rana

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Tej-Singh-Rana

package main

import "fmt"

func main() {
  fmt.Println("Hello, Go Programmer!!")
  
}
  

Tej-Singh-Rana

#!/bin/python3
try:
    x = int(input())
    y = int(input())

    z = x + y
    print(z)
except ValueError:
    print("Enter the correct numeric value. ")
except SyntaxError:

Tej-Singh-Rana

#!/bin/bash

read name
echo "Hello, $name Good to see you here!!"
sleep 2

echo "Count down start ..."