What is kubectl and How to configure it for accessing kubernetes?
Use of kubeconfig file In order for kubectl to find and access a Kubernetes cluster, it needs a kubeconfig file, which is created automatically When you create a cluster using…
Read more »What is kops?
Kops stands for “Kubernetes Operations”. Kops is the easiest way to get a production grade Kubernetes cluster up and running. kops helps you in the following for production-grade, highly available,…
Read more »EKS error: You must be logged in to the server (Unauthorized)
You should not create the cluster with root account. Instead create a user or if you want to install EKS with aws cli create IAM role for the EC2 instance…
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How to Generate new SSH key and and set-up in GitHub Id
In this tutorial I’m going to describe about how to set SSH key in your GitHub Id. Follow some easy steps I sure these steps will 100% helpful for you….
Read more »Setting and Configuring Amazon EKS using AWS Management Console and AWS CLI
Prerequisites AWS CLIA command line tool for working with AWS services, including Amazon EKS. This guide requires that you use version 2.1.26 or later or 1.19.7 or later. How to…
Read more »How to install and Configure kubectl?
To install kubectl on macOS Download the latest release: To install kubectl on Linux Download the latest release with the command: To install kubectl on Windows Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud…
Read more »Amazon Elastic Kubernetes Service (Amazon EKS) Architecture Explained with Diagram
Amazon Elastic Kubernetes Service (Amazon EKS) runs the Kubernetes management infrastructure for you across multiple AWS Availability Zones to eliminate a single point of failure. Amazon EKS is certified Kubernetes-conformant,…
Read more »Kubernetes as a service with comparison of EKS vs AKS vs GKE
This blog is still in progress. I am still working on it. Howee]ver, I have consolidated all the comparison available on the internet at one place in image format. Please…
Read more »Kubernetes Tutorials: Statefulset with example
Statefulset example with HostPath PV Statefulsets… Statefulset example with NFS PV Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech…
Read more »Explained Kubernetes Jobs and Cronjobs with Example
Cronjob Example 1 job Example Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories…
Read more »Explained Kubernetes Secret with Example
What is Kubernetes SecretsA Secret is an object that contains a small amount of sensitive data such as a password, a token, or a key. Objects of type secret are…
Read more »Explained Kubernetes DaemonSet with Example
Creating a Kubernetes DaemonSet Let’s use a simple DaemonSet for Apache HTTP server to illustrate this Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus….
Read more »Kubernetes Yaml file faster for Deployment and DaemonSet using kubectl
The fastest hack is to create a deployment file using Now replace the line kind: Deployment with kind: DaemonSet in nginx-ds.yaml and remove the line replicas: 1 However, the following…
Read more »Explained Kubernetes ReclaimPolicy for PersistentVolumeClaim & PersistentVolume
Example 1 Example 2 Example 3 Example 4 Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps…
Read more »AWS Lab & Exercise: VPC – Virtual Private Cloud Assignment
Problem Statement: Create a VPC. put 4 subnets into it with 2 private and 2 public in 2 different availability zones add 2 routing tables, 1 public and 1 private…
Read more »Free SSL Certificates using Letsencrypt.org and acme.sh on XMAPP in Linux
Referencehttps://github.com/acmesh-official/acme.sh Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock…
Read more »“Key is already in use” of How to use 2 public key in github
Error 1: Solution 1 – https://stackoverflow.com/questions/17846529/could-not-open-a-connection-to-your-authentication-agent Error – 2 Solution – 2 eval ssh-agent -sssh-add ~/.ssh/id_rsa_rajesh.cotocus Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked…
Read more »Top Sites for Corporate Training, Online Tutoring and Digital Education
Online Training Also known as computer based training (CBT), distance online learning, or e-learning, online training is a form of instruction that takes place completely on the internet. It involves…
Read more »DevOps Interview Questions and Answer – Part 5
DevOps Interview Questions: Programming What is your favorite scripting/programming language(s)? Why ? General CS, algorithms Q&A: 5 minutes Data structures – discuss possible implementations and applications: Binary tree Hash map…
Read more »Front End Developer Interview Questions
CSS Interview Questions What is CSS selector specificity and how does it work? What’s the difference between “resetting” and “normalizing” CSS? Which would you choose, and why? Describe Floats and…
Read more »How to cope with a 7-page essay faster
Being a student is not as easy as you might wish it to be. You have many responsibilities that make your life complicated from time to time. Being obligated to…
Read more »4 Recommendations on Starting that Terrifying Research Project
How to Start a Research Paper that You Dread the Thought of? If you’re a college or university student, academic writing assignments are an indispensable part of the process. For…
Read more »Deep Dive into Git Internal with SHA1 and Hash
Questions What is SHA1? What if 2 hash collision while using git? Process of sign a commit or tag in git? Why sing a commit or tag is required? How…
Read more »What is Jira Advanced Roadmaps (formerly Portfolio)?
Advanced Roadmaps aka Portfolio is a tool that enables teams to build plans and track progress in Jira Software. Being an add-on for Jira, it provides seamless integration with all…
Read more »What is Large Scale Scrum (LeSS)?
Large-Scale Scrum ( LeSS ) is a way of scaling agile and scaling scrum to large and big product development groups. It has been used since 2005 in different software…
Read more »Site Reliability Engineering – SRE – Free Ebooks and Handbook Collection
https://s905060.gitbooks.io/site-reliability-engineer-handbook/content/ https://github.com/s905060/site-reliability-engineer-handbook https://github.com/captn3m0/google-sre-ebook https://github.com/euclid1990/google-sre-book https://github.com/dastergon/awesome-sre https://github.com/sysbooks/site-reliability-engineering https://github.com/captn3m0/google-sre-ebook/releases https://github.com/vorozhko/site-reliability-engineer-guide https://github.com/andrealmar/sre-university https://github.com/mxssl/sre-interview-prep-guide https://github.com/chiaen/sre-book-in-audio https://free-for.dev/ Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share…
Read more »List of IP Address of Microsoft Bingbot and Googlebot
GooglebotGooglebot is the generic name for Google’s web crawler. Googlebot is the general name for two different types of crawlers: a desktop crawler that simulates a user on desktop, and…
Read more »Jenkins Pipeline Complete Reference Tutorials
What is a Jenkins Pipeline? Jenkins Pipeline (or simply “Pipeline”) is a suite of plugins which supports implementing and integrating continuous delivery pipelines into Jenkins. Jenkins Pipeline provides an extensible…
Read more »How to save HTTP requests headers, methods and body to a file?
Method 1 – Using mod_log_forensic apache Module Step 1 – Check if mod_log_forensic module is enabled or not Step 2 – Enable mod_log_forensic module using following lines in httpd.conf Method…
Read more »DDOS attack and HTTP flood attack on AWS from AWS EC2 instance using New Relic Synthetics & infalted aws bill to $3000
How I prevented DDOS attack and HTTP flood attack from New Relic Synthetics Monitoring of AWS EC2 Instance? 5 Dec 2020 – DDOS attack and HTTP flood attack Start Date…
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