Ansible is an agent-less IT automation tool.

Q) What is so great about Ansible?

A)There are several configuration management tools out there [Chef/Puppet].

Ansible’s USP

  • Easy-to-Read Syntax [Plain English]
  • Zero Installation on Remote Hosts [No agent/software to be installed on Remote Hosts]
  • Push Based [Control is in your hands/Your destiny in your own hands] — Ansible connects to remote servers & executes code, which may or may not change remote server state.
  • Built-in Modules [We as System Admins use modules to perform tasks such as installing softwares, copying files, so on & so forth (Sky's the limit)]

Installing Ansible

I…


Life is all about imagination. So Let's Imagine.

You are Kubernetes Administrator of XYZ Pvt Ltd. One fine day your boss calls you in her/his cabin (We believe in gender equality). The problem statement in front of you is to work on Custom Resources in Kubernetes with Operational Intelligence(Which will help XYZ Pvt Ltd’s application(business) to run in AutoPilot mode). Stunned by the problem, you decide to quit(resign).

Reason : After being CKA/CKAD/CKS certified, you thought life would be easy till retirement. …


Stay at home to “Stay Safe”

A big shout out to everyone,directly and indirectly involved in mitigating COVID-19. Its a tragedy, but I am sure ,the world will overcome it. (We are born fighters)

Packer = Is a free and open source tool for creating golden images for multiple platforms from a single source configuration.

Packer is given to the world by HashiCorp.

Yes its the same company, which has given us wonderful tools such as Terraform, Consul, Vagrant & Vault

Reference = https://packer.io/

Gold Mine for all Packer Tool related information

Lives Here= https://github.com/hashicorp/packer

Current Version = 1.5.5

Written…


Again an article which was long overdue. One of the finest tools out there(Terraform)

FAQ’S

  1. Why should I use Terraform, if I am already using AWS Cloud Formation or Openstack Heat?
  2. Why should I learn something new (I am happy with what I know, just want to maintain it and retire soon)
  3. What is Infrastructure Provisioning? (IAC = Infrastructure as Code)
  4. What the hell is Terraform?

All questions will be answered (Have patience, the only virtue a human being should posses)

Terraform is a tool for building, changing, and versioning infrastructure safely and efficiently.

Terraform is a tool by Hashicorp…


Long overdue story, wanted to cover it, as part of my Docker 101 & Minikube 101, but due to work commitments could not finish it off in time.

If you have not read Docker 101 & Minikube 101, do go through.

Docker 101 = https://medium.com/@csemanit2015/docker-101-6f4bb77dda8c

Minikube 101 = https://medium.com/@csemanit2015/minikube-101-kubernetes-local-cluster-deploment-service-heapster-dashboard-hpaminikube-715828ae235d

A big shout out to all fighters, volunteers directly and indirectly involved in mitigating COVID-19. Its a tragedy, but I am sure the world will overcome it. (We are born fighters)

Agenda

  1. HAProxy Introduction
  2. Difference between Reverse Proxy & Forward Proxy
  3. HAProxy 101 Labs

HAProxy is free, open source software that…


Marathas(Peshwas) and brief introduction to Modern India

Prologue

Chronological Order — Peshwas

Modern India — In Brief

Peshwas (One of 8 ministers (Aastpradhan))

18th centaury age was the age of supremacy for Marathas this was facilitated by decline of Mughals. Post of Peshwas was initially as the Keeper of Records “

All Peshwas were Brahmin & during 18th centaury they became the real rulers of Maratha State as Reflected by Sangola Agreement of 1750 by which the Peshwas got civil & military powers in an effective manner (Pune — Head Quarters)

Balaji Vishwanath (Ist peshwa) because of his military &…


Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency

This is the importance of VCS & Git.

This is what I saw at a building premises of a MNC

In case of fire, first commit code, push & then leave building. We already know what leaving a building means. I will try to explain in this Git Series what Commit and Push means.

Some Facts

Git Creator = Linus Torvalds (Yes right Linux creator)

Git Maintained By = Junio Hamano & others

When you…


LXC 101 PART = II

This is an continuation of LXC 101, if you have not read it kindly refer https://medium.com/@csemanit2015/lxc-101-e31481801900

Recap of LXC 101 — Part I

Installed LXC in Ubuntu host machine.Created two container, one Ubuntu and one Centos.

Installed Apache2 web server in Ubuntu container and accessed web pages from the host machine

In Part-II we will cover topics such as Clone, Template & Snapshot.

  1. lxc-copy creates a clone

We are creating a clone of container arun, which we had already created.

The name given to the clone is arun4.

We can clone the container either using…


By Arunvel Arunchalam

Welcome to LXC 101

LXC (Linux Containers) is an operating system virtualization method for running multiple isolated Linux systems (containers) on a control host using a single Linux kernel.

linuxcontainers.org is the umbrella project behind LXC, LXD and LXCFS

LXC containers are often considered as something in the middle between a chroot and a full fledged virtual machine

The below diagram shows two of most popular container environments

Docker Vs LXC

The goal of LXC is to create an environment as close as possible to a standard Linux installation but without the need for a separate kernel.


Geography (Biosphere, Ecosystem and Biomes of the world)

Prologue

Biosphere

Biotic Regions

Ecology and ecosystem

List of Biomes (Tundra in detail)

Note — This article comes under the salient features of World’s physical geography and some portions of Ecology.

Biosphere

Before getting into detail in Biosphere, a quick glance on the Types of sphere of the earth. The area near the surface of the earth can be divided up into four inter-connected “geo-spheres:” the lithosphere, hydrosphere, biosphere, and atmosphere. …

Arunvel Arunachalam

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store