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How to Reach Localhost on Host from Docker Container

Docker has revolutionized the way we develop, deploy, and manage applications by providing isolated environments. However, challenges arise, especially...
Tanvir Kour
Sep 5, 2024 2 min read

Setting Up a CI/CD Pipeline with Jenkins

Jenkins, an open-source automation server, is one of the most widely used tools for setting up CI/CD pipelines. Its...
Abraham Dahunsi
Sep 3, 2024 10 min read

What is Continuous Integration and Continuous Deployment (CI/CD)?: Explained in 5 minutes

The software market is moving at a really fast pace and is quite unforgiving; this means that for any...
Abraham Dahunsi
Sep 3, 2024 5 min read

Deploying a Next.js App on HTTPS with Docker Using NGINX as a Reverse Proxy

In this tutorial, we’ll walk through setting up a Docker Compose environment where NGINX serves as a reverse proxy...
Adesoji Alu
Aug 28, 2024 2 min read

Machine Learning in Credit Systems: How to Implement-Practical Tips and Advice

In recent times, Machine Learning has become vital in credit systems, significantly improving efficiency and accuracy over traditional credit...
Tanvir Kour
Sep 4, 2024 2 min read

What Is MAC Address Filtering and How It Works?

To safeguard networks from unwanted access, network security managers employ a variety of techniques.  A technique that is becoming...
Tanvir Kour
Sep 3, 2024 4 min read

How DevOps speed up the software development process?

Do you want to create high-quality applications and software? Using new tools and innovative methodologies like Development and Operations...
Tanvir Kour
Sep 2, 2024 4 min read

Choosing the Right Technology Stack for Sports Betting Software Development

In today’s digital landscape, the sports betting industry has undergone a significant transformation, with the rise of online platforms...
Avinash Bendigeri
Sep 2, 2024 1 min read

All Stories

Context Switching Made Easy under Kubernetes powered Docker for Mac 18.02.0

Say Bye to Kubectx ! I have been a great fan of kubectx and kubectl which has been a fast way...
Ajeet Raina
Feb 2, 2018 5 min read

2-minutes to Kubernetes Cluster on Docker for Mac 18.01 using Swarm CLI

Docker for Mac 18.01.0 CE is available for the general public. It holds experimental Kubernetes release running on Linux Kernel 4.9.75,...
Ajeet Raina
Jan 21, 2018 1 min read

3 Minutes to Single Node Kubernetes cluster on Docker for Mac Platform

Docker For Mac 17.12 GA Release is now available for the general public. Experimental Kubernetes Support is available only on Edge...
Ajeet Raina
Jan 15, 2018 6 min read

When Kubernetes Meet Docker Swarm for the First time under Docker for Mac 17.12 Release

Docker For Mac 17.12 GA is the first release which includes both the orchestrators – Docker Swarm & Kubernetes under the...
Ajeet Raina
Dec 19, 2017 4 min read

Top 10 Reasons why LinuxKit is better than the traditional OS distribution

  “LinuxKit is NOT designed with an intention to replace any of traditional OS like Alpine, Ubuntu, Red Hat etc. It...
Ajeet Raina
Dec 17, 2017 7 min read

A First Look at Kubernetes Integrated Docker For Mac Platform

Docker support for Kubernetes is now in private beta. As a docker captain, I was able to be a part of...
Ajeet Raina
Dec 15, 2017 5 min read

Running LinuxKit locally on Oracle VirtualBox Platform Made Easy

LinuxKit GITHUB repository has already crossed 1800 commits, 3600+ stars &  been forked 420+ times since April 2017 when it was...
Ajeet Raina
Dec 5, 2017 3 min read

Building a minimalistic LinuxKit OS on Raspberry Pi 3 using Moby

LinuxKit GITHUB repository recently crossed 3495 stars, forked around 410+ times and added 80+ contributors. Just 7 months old project and...
Ajeet Raina
Nov 14, 2017 3 min read

How to Build Kubernetes Cluster using CRI-containerd & Moby

Let’s talk about CRI Vs CRI-Containerd… Container Runtime Interface(a.ka. CRI) is a standard way to integrate Container Runtime with Kubernetes. It...
Ajeet Raina
Nov 4, 2017 4 min read

Getting Started with Multi-Node Kubernetes Cluster using LinuxKit

Here’s a BIG news for the entire Container Community – “Kubernetes Support is coming to Docker Platform“. What does this mean? This...
Ajeet Raina
Oct 22, 2017 2 min read

Docker, Prometheus & Pushgateway for NVIDIA GPU Metrics & Monitoring

In my last blog post, I talked about how to get started with NVIDIA docker & interaction with NVIDIA GPU system. I...
Ajeet Raina
Sep 16, 2017 3 min read

Building a secure Docker Host VM on VMware ESXi using LinuxKit & Moby

Post Dockercon 2017 @ Austin TX,  I raised a feature request titled “LinuxKit command to push vmware.vmdk to remote ESXi datastore”....
Ajeet Raina
Sep 2, 2017 3 min read

Running NVIDIA Docker in the GPU-Accelerated Data Center

Docker is the leading container platform which provides both hardware and software encapsulation by allowing multiple containers to run on the same...
Ajeet Raina
Aug 25, 2017 5 min read

Hybrid Docker Swarm Mode Cluster with Multi-OS Application Deployment

Here comes the most awaited feature of 2017 – “Building Docker Swarm cluster which includes all Windows cluster, or a hybrid...
Ajeet Raina
Aug 16, 2017 3 min read

Walkthrough: Enabling IPv6 Functionality for Docker & Docker Compose

By default, Docker assigns IPv4 addresses to containers. Does Docker support IPv6 protocol too? If yes, how complicated is to get it...
Ajeet Raina
Aug 5, 2017 3 min read

Building a Secure VM based on LinuxKit on Microsoft Azure Platform

LinuxKit GITHUB repository recently crossed 3000 stars, forked around 300+ times and added 60+ contributors. Just 5 months old project and...
Ajeet Raina
Jul 30, 2017 2 min read

Test Drive Elastic stack on PWD platform running Docker 17.06 CE Swarm Mode in 5 minutes

Let’s talk about Dockerized Elastic Stack… Elastic Stack is an open source solution that reliably and securely take data from any...
Ajeet Raina
Jul 22, 2017 3 min read

Building Docker For Mac 17.06 Community Edition using Moby & LinuxKit

Docker For Mac 17.06 CE edition is the first Docker version built entirely on the Moby Project. In case you’re new,...
Ajeet Raina
Jul 13, 2017 3 min read

Walkthrough: How to build your own customised LinuxKit kernel?

  “..Its Time to Talk about Bring Your Own Components (BYOC) now..” The Moby Project  is gaining momentum day by day. If...
Ajeet Raina
Jul 9, 2017 3 min read

Talking about Moby & LinuxKit Awesomeness at Docker Bangalore Meetup

Today  I spoke at Docker Bangalore Meetup which took place in IBM India Systems Development Lab(ISL) – an R&D Division located at...
Ajeet Raina
Jul 1, 2017 2 min read

Docker 17.06 Swarm Mode: Now with built-in MacVLAN & Node-Local Networks support

Docker 17.06.0-ce-RC5 got announced 5 days back and is available for testing. It brings numerous new features & enablements under this new...
Ajeet Raina
Jun 26, 2017 4 min read

Running LinuxKit on AWS Platform made easy

With around 2800+ GITHUB stars, 54 contributors,  28 external, 50+ commits per week since the DockerCon launch, LinuxKit has really gained...
Ajeet Raina
Jun 18, 2017 2 min read

Why Infrakit & LinuxKit are better together for Building Immutable Infrastructure?

Yet Another Problem Statement(YAPS)… Let us accept the fact – “Managing Docker on different Infrastructure is still difficult and not portable”....
Ajeet Raina
Jun 11, 2017 4 min read

A Quick Look at LinuxKit Packaging System

One of the most compelling feature of LinuxKit is “Everything replaceable and customisable”. You can now build up your own customised...
Ajeet Raina
Jun 3, 2017 5 min read

Test Drive Multitenant Feature with Oracle 12C Enterprise Edition Docker Store Image

At Dockercon last month, Oracle released  its flagship databases, middleware and developer tools into the Docker Store marketplace via the Docker...
Ajeet Raina
May 29, 2017 3 min read

Topology Aware Scheduling under Docker v17.05.0 Swarm Mode Cluster

  Docker 17.05.0 Final release went public exactly 2 week back.This community release was the first release as part of new Moby...
Ajeet Raina
May 18, 2017 4 min read

When Moby Meet Kubernetes for the first time

Moby has turned to be an open playground for collaborators. It has become a popular collaborative project for the container ecosystem to...
Ajeet Raina
May 11, 2017 3 min read

Demystifying the Relationship Between Moby & Docker

Why https://github.com/docker/docker been redirected to moby/moby?  Why Docker created the Moby project? Is Docker renamed to Moby? What it actually mean...
Ajeet Raina
May 6, 2017 3 min read

Test-Drive LinuxKit OS on Oracle VirtualBox running on macOS Sierra

In my last blog post, I showed how to get started with LinuxKit for Google Cloud Platform. LinuxKit is secure, lean and...
Ajeet Raina
May 1, 2017 2 min read

LinuxKit 101: Getting Started with LinuxKit for Google Cloud Platform

  “…LinuxKit? A New Beast?      What problem does it solve for us?..”   In case you missed out Dockercon...
Ajeet Raina
Apr 26, 2017 4 min read

Building Web Frontend/UI for Local Docker Registry using SUSE Portus

If you are looking out for Web UI for your private Docker Registry, I would recommend to test-drive a tool called...
Ajeet Raina
Apr 9, 2017 2 min read

Test Drive 5 Cool Docker Application Stacks on play-with-docker (PWD) platform

Do you want to learn Docker FOR FREE OF COST? Yes, you read it correct. Thanks to a playground called “play-with-docker”...
Ajeet Raina
Apr 2, 2017 4 min read

What’s New in Docker 17.03 Volume Plugin Architecture & Specification?

Docker, Inc announced initial support for volume driver plugins for the first time under Docker 1.8 release. Since then, there has...
Ajeet Raina
Mar 28, 2017 1 min read

Docker Service Inspection Filtering & Template Engine under Swarm Mode

Go programming language has really helped in shaping Docker as a powerful software and enabling fast development for distributed systems. It...
Ajeet Raina
Mar 20, 2017 2 min read

Running Apache JMeter 3.1 Distributed Load Testing Tool using Docker Compose v3.1 on Swarm Mode Cluster

Apache JMeter is a popular open source software used as a load testing tool for analyzing and measuring the performance of...
Ajeet Raina
Mar 18, 2017 4 min read

Dockercon 2017 surely gonna be EPIC | Top Sessions Which You Can’t Miss to Attend This Year..

Are you still thinking whether or not to attend Dockercon 2017? Still finding it difficult to convince yourself or your boss/manager...
Ajeet Raina
Mar 13, 2017 2 min read

Introducing new RexRay 0.8 with Docker 17.03 Managed Plugin System for Persistent Storage on Cloud Platforms

DellEMC Rex-Ray 0.8 Final Release was announced last week. Graduated as top-level project within {code} community, RexRay 0.8 release has been...
Ajeet Raina
Mar 5, 2017 2 min read

Docker Compose v3.1 file format now supports Docker 1.13.1 Secret Management

Docker Engine 1.13.1 went GA last week and introduced one of the most awaited feature called Secrets Management . With a...
Ajeet Raina
Feb 15, 2017 2 min read

Docker For Mac 1.13.0 brings support for macOS Sierra, now runs ARM & AARCH64 based Docker containers

Recently I purchased a brand new slim 13.3 inch Apple Mac Book  Air with an amazing 1.6GHz dual-core Intel Core i5 processor....
Ajeet Raina
Jan 29, 2017 3 min read

Test-Drive Docker 1.12 on first 64-bit ARM OpenSUSE running on Raspberry Pi 3

Raspberry Pi 3 Model B is the first 64 bit version and the third generation Pi box which runs on 1.2GHz...
Ajeet Raina
Jan 13, 2017 3 min read

What’s New in Docker Engine 1.13 Swarm Mode?

Docker Engine 1.13.0 Final Release has been officially announced . With over 1050 commits, 1025 file changes and 175 days since...
Ajeet Raina
Jan 8, 2017 7 min read

Key Takeaways from Docker “Containerd ~ A Core Container Runtime Project” Announcement

With almost every new release, Docker Inc. has open sourced its vital and popular software tools to the community to join...
Ajeet Raina
Jan 3, 2017 3 min read

The 20-minutes Docker 1.12 Swarm Mode demonstration on Azure Platform

2016 has been a great year for Docker Inc. With the announcement of Docker 1.12 release in last Dockercon, a new...
Ajeet Raina
Dec 26, 2016 10 min read

Top 10 Cool New Features in Docker Datacenter for Dev & IT Operations Team

Docker Datacenter(DDC) provides an integrated platform for developers and IT operations teams to collaborate securely on the application life cycle. It...
Ajeet Raina
Dec 17, 2016 3 min read

Walkthrough: Building distributed Docker persistent storage platform for Microservices using DellEMC RexRay & ScaleIO

Today Enterprise IT look for a secure, scalable, out-of-the-box, elastic, portable and integrated solution platform which can span across from their...
Ajeet Raina
Dec 9, 2016 5 min read

I’m thrilled ! I’m a {code} Catalyst !

Carrying a slogan “Code Open, Deploy Anywhere”, {code} by DellEMC is an organization of open source engineers focused on next generation...
Ajeet Raina
Dec 6, 2016 1 min read

Assessing the current state of Docker Engine & Tools on Raspberry Pi

Are you planning to speak or conduct your next Docker Workshop on Raspberry Pi’s? Still curious to know whether the tools...
Ajeet Raina
Nov 14, 2016 4 min read

What’s new upcoming in Docker Compose v1.9.0?

Docker Compose has gained lots of attention in the recent past due to its easy one-liner installation(on Linux, Windows & Mac...
Ajeet Raina
Nov 12, 2016 2 min read

Test-Drive Docker “Infrakit” using Docker container

Last week I read a research paper called “Computer Immunology” written by a computer scientist Mark Burgess(Founder of CfEngine). Thanks to...
Ajeet Raina
Oct 23, 2016 4 min read

Docker 1.12 Swarm Mode & Persistent Storage using NFS

Containers are stateless by nature and likely to be short-lived. They are quite ephemeral than VMs. What it actually means? Say,...
Ajeet Raina
Oct 11, 2016 4 min read

A Comparative Study of Docker Engine on Windows Server Vs Linux Platform

September 26, 2016 was an important day for both Docker Inc. and Microsoft at Ignite conference in Atlanta. Two week ago,...
Ajeet Raina
Oct 11, 2016 5 min read

What’s the story of Docker Compose under Docker 1.12.1 “Swarm Mode”?

What’s the story of Docker compose in 1.12.1 Swarm Mode? How does it integrates with the new APIs – service, node...
Ajeet Raina
Sep 30, 2016 3 min read

Running Prometheus Docker container for monitoring Microservices on Raspberry Pi

In the previous post, we talked about running Nagios container on Raspberry Pi for the first time.Nagios is a free and...
Ajeet Raina
Sep 24, 2016 3 min read

Turn Your Raspberry Pi into Out-of-band Monitoring Device using Docker

Why should I deploy Docker to IoT devices? What are the use cases of running containers inside the IoT device like...
Ajeet Raina
Sep 22, 2016 3 min read

Docker 1.12.1 Swarm Mode & Persistent Storage with DellEMC RexRay on AWS Platform

“Does Docker Engine 1.12 has storage discovery similar to Service Discovery and Orchestration Feature? What is the Volume/Persistent Storage story in...
Ajeet Raina
Sep 14, 2016 5 min read

Building the first CentOS 7.2 ARM docker image on Raspberry Pi 3

In the previous post, I showed how to get Docker 1.12.1 up and running on Raspberry Pi3 in just 5 minutes....
Ajeet Raina
Sep 9, 2016 2 min read

What’s new in Docker 1.12 Scheduling? – Part-I

In our previous posts, we spent considerable amount of time deep-diving into Swarm Mode which is in-built orchestration engine in Docker...
Ajeet Raina
Sep 3, 2016 4 min read

Running Docker on Raspberry Pi in 5 minutes

Docker support for Raspberry Pi was introduced for the first time in 2016 with 1.12 release. . With Docker v1.12.1 release,...
Ajeet Raina
Aug 23, 2016 1 min read

What’s new in Docker 1.12.0 Load-Balancing feature?

In the previous blog post, we deep-dived into Service Discovery aspects of Docker. A service is now a first class citizen in...
Ajeet Raina
Aug 11, 2016 5 min read

Demonstrating Docker 1.12 Service Discovery with Docker Compose

Docker 1.12 is GA now. Thanks to Docker Inc. core Team and community support for releasing it on time as promised...
Ajeet Raina
Jul 30, 2016 1 min read

Demystifying Service Discovery under Docker Engine 1.12.0

Prior to Docker 1.12 release, setting up Swarm cluster needed some sort of service discovery backend. There are multiple discovery backends...
Ajeet Raina
Jul 27, 2016 4 min read

Understanding Node Failure Handling under Docker 1.12 Swarm Mode

In the last Meetup (#Docker Bangalore), there has been lots of curiosity around “Desired State Reconciliation” & “Node Management” feature in case...
Ajeet Raina
Jul 15, 2016 3 min read

Docker 1.12 Swarm Mode – Under the hood

Today Docker Inc. released Engine 1.12 Release Candidate 4 with numerous improvements and added security features. With an optional “Swarm Mode”...
Ajeet Raina
Jul 14, 2016 3 min read

Docker 1.12 Networking Model Overview

“The Best way to orchestrate Docker is Docker” In our previous post, we talked about Swarm Mode’s built-in orchestration and distribution...
Ajeet Raina
Jun 29, 2016 5 min read

Docker Engine 1.12 comes with built-in Distribution & Orchestration System

Docker Engine 1.12 can be rightly called ” A Next Generation Docker Clustering & Distributed System”. Though Docker Engine 1.12 Final Release is...
Ajeet Raina
Jun 20, 2016 3 min read

Building Microservice applications on Docker-Datacenter (DDC) using Docker Compose

Docker-Datacenter (DDC) is targeted for both developers and IT operations team. DDC provides both developers and IT operations a common option...
Ajeet Raina
Jun 4, 2016 1 min read

Implementing Multi-Host Docker Networking with Docker-Datacenter (DDC)

In our previous post, we looked at detailed implementation of Docker-Datacenter-In-A-Box (Container-as-a-Service) on VMware ESXi platform. DDC pluggable architecture and open APIs allows...
Ajeet Raina
May 24, 2016 2 min read

Implementing Docker-Datacenter-In-A-Box (Container-as-a-Service) on VMware ESXi platform

The critical component for any enterprise IT, either having multiple data centers or a hybrid cloud or multiple cloud providers, is...
Ajeet Raina
May 17, 2016 4 min read

New Docker Engine 1.11 integrates runC and containerd

Docker 1.11 is two week old now. Popular for its Software Infrastructure Plumbing(SIP), Docker Inc. first focused on adoption of libnetwork,...
Ajeet Raina
Apr 25, 2016 4 min read

Integrating AWS and Docker Cloud 1.0 ~ A Multicloud Application Delivery Service

Docker’s acquisition of Tutum, a cross-cloud container management service has really paid-off. Two week back, Docker announced “Docker Cloud 1.0” –...
Ajeet Raina
Mar 13, 2016 5 min read

New Docker Engine 1.10 brings Enterprise-level security hardening – Secure Computing

Security issues like kernel exploits,  denial-of-service attacks, container breakouts, poisoned images, compromising secrets etc. has been talked a lot in recent...
Ajeet Raina
Feb 28, 2016 6 min read

New Docker Engine 1.10 brings Enterprise-level Security Hardening – User Namespace

User Namespace support was introduced as an experimental feature last November under Docker 1.9 version. Docker 1.10 finally brings it as...
Ajeet Raina
Feb 23, 2016 3 min read

Getting MariaDB Up and Running

RHEL 7 comes with MariaDB by default. Don’t get surprised if you don’t see MySQL server specific packages being displayed through...
Ajeet Raina
Jan 15, 2016 3 min read

Running Docker on Linux Kernel 2.6.x

Installing Docker on Linux Kernel 2.6.x is quite unstable. Docker Inc. recommends using Linux Kernel 3.x.x to have smooth Docker functionality....
Ajeet Raina
Jan 15, 2016 1 min read

Getting Started with Docker Swarm

Docker Swarm is 1 year old now. Docker Inc. during DockerConEU, December 2014 made the announcement of Docker Swarm. A Docker...
Ajeet Raina
Jan 2, 2016 4 min read

Adding new Host to Docker Swarm & Universal Control Plane through Docker Machine

In our previous post, we spent considerable time in understanding what is Universal Control Plane(UCP) and how to add hosts to...
Ajeet Raina
Dec 25, 2015 37 sec read

Setting up Docker Hosts on Google Compute Engine using Docker Machine

Docker Machine enables a simplified approach to set up Docker hosts on supported platforms, including Linux, Windows, OS X, and various...
Ajeet Raina
Dec 23, 2015 1 min read

Docker Container Management using Universal Control Plane

Docker recently announced Universal Control Plane (UCP) beta availability to the public. This tool delivers Enterprise-ready capabilities and is meant to...
Ajeet Raina
Dec 22, 2015 4 min read

How to reconstruct Parted Magic ISO through adding packages from Slackware

Parted Magic is a complete hard disk management solution.Parted Magic is a small live CD/USB/PXE with its elemental purpose being to...
Ajeet Raina
Dec 15, 2015 3 min read

Automating Hyper-V VM deployment & configuration through PowerShell

I am not Microsoft guy but recently I have been asked by my colleague to assist him in automating Hyper-V VM...
Ajeet Raina
Dec 15, 2015 2 min read

Building Docker-Ready Virtual Infrastructure through Docker Machine

“Is VM passe?” ~ this is an important debate ongoing around the globe among the CEOs, CFOs and CIOs. Most of...
Ajeet Raina
Dec 13, 2015 3 min read

New Container Network Model @ Docker 1.9

Docker 1.9 new networking is Software Defined Networking (SDN) for containers. Pushing the experimental version to the public was a right...
Ajeet Raina
Nov 14, 2015 10 min read

Understanding Docker Networking – Part-I

This is a tutorial series for understanding how Docker Networking really works. I have tried to put it in very simple...
Ajeet Raina
Nov 1, 2015 9 min read

How to build .DEB packages through Docker

Building .DEB package is still a daunting process. It involves a series of compiling, linking and building the source packages. Compiling...
Ajeet Raina
Oct 31, 2015 1 min read

The Anatomy of Docker Containers

You must be curious about what goes in and out of the running Docker containers. Debugging a normal Linux system processes...
Ajeet Raina
Oct 17, 2015 6 min read

A Docker Deployment Workflow

Docker is an amazing technology and it just simplifies both workflows and communication. Traditionally, the cycle of getting an application from...
Ajeet Raina
Oct 15, 2015 1 min read

Getting access to Docker Formatted Container Images on Red Hat Systems

Just like Docker, Amazon and Red Hat too announced the availability of Docker formatted container images. This is purely an effort...
Ajeet Raina
Oct 13, 2015 2 min read

How to get rid of Docker images with no repository?

I had dozens of Docker containers and images running on my host machine. I played around those images for my internal...
Ajeet Raina
Oct 11, 2015 1 min read

Run Dell SYSCFG inside a Docker Container

Docker is all about application. It doesn’t need BIOS, NIC and firmware to run any application. But its gives you flexibility...
Ajeet Raina
Oct 10, 2015 1 min read

Running Docker Private Registry server Frontend UI

Are you planning to setup own Docker private registry in your lab? Are you planning to bring all the in-house developers...
Ajeet Raina
Sep 20, 2015 1 min read

How to setup Mediawiki in seconds using Docker?

I still follow the same old traditional mediawiki software to track the roadmap, knowledge base articles, latest and updates for Linux...
Ajeet Raina
Sep 13, 2015 2 min read

Running Docker containers on Windows

Are you a Microsoft enthusiast? Do you want to try running containers on Windows platform? Then you have at the right...
Ajeet Raina
Aug 1, 2015 41 sec read

Highlights from the Dockercon 2015

Last month at San Francisco @ Dockercon15, there were numerous exciting announcement which includes runtime container called runC, Docker network, Docker...
Ajeet Raina
Jul 26, 2015 1 min read

How to access Docker namespace?

It is never recommended to install openssh-server on the container for just mere shell access. It is always suggested to keep your...
Ajeet Raina
May 27, 2015 1 min read

How to Link multiple Docker containers together?

Today we are going to look at an interesting concept of linking containers. In our previous post, we pulled LAMP which...
Ajeet Raina
May 21, 2015 12 min read

Setting up LAMP stack in a Docker container

Yesterday evening I decided to spend time on setting up LAMP( Linux, Apache, MySQL and PHP) stack inside a docker container....
Ajeet Raina
May 19, 2015 1 min read

How to push Docker Image to Docker Hub Registry?

This is step by step guide on how to push Docker Image to Docker Hub registry. To get started with this...
Ajeet Raina
May 19, 2015 3 min read

Automate the Bare Metal Provisioning Process through Puppet Razor

This blog post describes how to automate the bare metal provisioning of physical and virtual machines through Razor. Razor is an...
Ajeet Raina
May 18, 2015 5 min read

Getting Started with Docker – Part-II

In my previous blog post we talked about how to pull images, create containers, start and stop the containers, today we are...
Ajeet Raina
May 15, 2015 4 min read

Getting Started with Docker – Part-1

This is a step by step guide for getting started with Docker. This guide starts with a fresh CentOS 7.0 host...
Ajeet Raina
May 15, 2015 4 min read

Running Hadoop over Lustre

This blog post describes how to run Apache Hadoop over the open source distributed parallel file system like Lustre. Hadoop is...
Ajeet Raina
May 14, 2015 4 min read

Running Puppet on Solaris

Few months back I tried setting up Puppet on Solaris platform. Puppetlabs provides bits for Puppet Enterprise software for Solaris in...
Ajeet Raina
May 11, 2015 1 min read

A Dirty Guide to iPerf

By default, the Iperf client connects to the Iperf server on the TCP port 5001 and the bandwidth displayed by Iperf...
Ajeet Raina
May 11, 2015 6 min read

Setting up OpenStack Juno with 1 controller and compute node

Here is a helpful script which just setup 1 OpenStack Juno controller and 1 compute node in an easy way: File:...
Ajeet Raina
May 11, 2015 6 min read

Orchestrating Docker using Puppet

Dockers containers are revolutionizing the cloud computing world, spreading everywhere and powering developers world-wide to automate deployment of applications as a...
Ajeet Raina
May 11, 2015 4 min read

How to change Docker Image Installation Directory?

Are you running out of space while creating more and more containers? Here is a guide to change the default docker...
Ajeet Raina
May 9, 2015 2 min read

Error: /usr/bin/docker: relocation error

Are you getting the below error while starting with the fresh docker installation on CentOS 7.0? /usr/bin/docker: relocation error: /usr/bin/docker: symbol...
Ajeet Raina
May 7, 2015 22 sec read

How to find dormant users on your Linux Box?

Want to know the inactive users on your Linux machine who have not been using the machine since long time? The...
Ajeet Raina
Apr 18, 2015 1 min read

How to enable Docker behind the firewall?

Are you working in restricted corporate environment? Are you looking for how to run Docker behind the firewall.You can always specify...
Ajeet Raina
Apr 10, 2015 19 sec read

Restrict maximum simultaneous logins on Linux

Want to restrict simultaneous number of logins attempt on Linux machine? Here is the quick way of doing it. 1. Edit...
Ajeet Raina
Apr 3, 2015 1 min read

PowerCLI Cookbook Published !!

I am very thrilled and excited about Packtpub publisher’s recently published “PowerCLI Cookbook”. I have been part of a reveiwer team...
Ajeet Raina
Mar 31, 2015 19 sec read

VMware vSphere Internals Q/A

Welcome Readers !! This is a second series of VMware vSphere Q/A which is emphasized on ESXi internals and related feature...
Ajeet Raina
Mar 31, 2015 3 min read

Understanding Docker Container Architecture

What is Docker? Docker is a lightweight containerization technology that has gained widespread popularity in recent years. What does Docker uses?...
Ajeet Raina
Mar 21, 2015 2 min read

Introduction to Docker Containers

Docker is a new open source tool based on Linux container technology (LXC). LXC is an OS level virtualization method for...
Ajeet Raina
Mar 10, 2015 4 min read

VMware vSphere High Availability Q/A

Looking for VMware vSphere High Availability based Interview questions? I have attempted to gather important interview questions which you might find...
Ajeet Raina
Mar 8, 2015 15 min read

How to setup Salt Halite on CentOS 6.5

Setting up Salt Halite is not straightforward process. Its a WebUI for Salt master where you can easily run commands and...
Ajeet Raina
Feb 7, 2015 48 sec read

SaltStack on CentOS 6.5

SaltStack is an extremely fast and scalable systems and configuration management software for predictive orchestration, cloud and data center automation, server...
Ajeet Raina
Feb 5, 2015 9 min read

100 Hadoop Interview Questions

Are you preparing for Hadoop Interview? Have you spent last several hours to get the collection of Hadoop MapReduce questions? Are...
Ajeet Raina
Jan 19, 2015 24 min read

Learn Puppet With Me – Day 4

In today’s session, we are going to quickstart writing a basic puppet module. A Very simple example could be creating a...
Ajeet Raina
Jan 19, 2015 38 sec read

Learn Puppet with Me – Day 3

Puppet is an open source framework and toolset for managing the configuration of computer systems. Puppet can be used to manage...
Ajeet Raina
Dec 20, 2014 9 min read

How to install Nagios on Linux?

Last week I thought of setting up Nagios on my Linux Box.I installed a fresh piece of RHEL on my Virtualbox...
Ajeet Raina
Dec 20, 2014 6 min read

How to configure Directory Indexing in Apache?

While attending RHCE examination, I faced a lot of question related to Apache. While installation and configuration of Apache was the...
Ajeet Raina
Dec 20, 2014 21 sec read

Installing Open-Xchange on Ubuntu 12.04

I thought of starting my day today with Open-Xchange. I had Vmware Workstation installed on one of Windows 7 Enterprise machine....
Ajeet Raina
Dec 20, 2014 4 min read

Learn Puppet with Me – Day 2

Today we are going to learn about Puppet Modules. What is Puppet Modules? Puppetlabs defines it as “Modules are self-contained bundles...
Ajeet Raina
Dec 19, 2014 49 sec read

Learn Puppet With Me – Day 1

Today is the day 1 of Learn Puppet with Me. I am starting this thread for those who want to learn...
Ajeet Raina
Dec 19, 2014 52 sec read

How to setup RAID 1 on Ubuntu Linux?

RAID 1 creates a mirror on the second drive. .You will need to create RAID aware partitions on your drives before...
Ajeet Raina
Dec 7, 2014 2 min read

How to setup RAID 0 on Ubuntu Linux?

RAID 0 will create striping to increase read/write speeds as the data can be read and written on separate disks at...
Ajeet Raina
Dec 7, 2014 1 min read

How do I bind NIC interrupts to selected CPU?

I read this interesting mailing thread few weeks back. I won’t be late to share this with open source enthusiast like you....
Ajeet Raina
Dec 7, 2014 52 sec read

Puppet Module for JBOSS

Recently one of my colleague called me up with a problem statement where he was finding difficulty configuring JBOSS through puppet....
Ajeet Raina
Dec 7, 2014 3 min read

Automated shutdown of ESXi and VMs through Powershell

My friend was running a cybercafe center. He has dozens of ESXi running 100 of VMs. He was using Dell Multi-UPS...
Ajeet Raina
Dec 7, 2014 1 min read

Installing Java Development Toolkit (JDK) on Linux

Installing Java Development toolkit on Linux is always matter of difficulty since Oracle provides both RPM and tarballs in their official...
Ajeet Raina
Dec 7, 2014 2 min read

How to setup Domain Name Server (DNS) on Linux?

It has been long I was thinking of writing something about DNS(Domain Name Server). DNS is a database of the IP...
Ajeet Raina
Dec 7, 2014 2 min read

How to test Multicast Packet Filtering?

Today morning I started my day testing with Multicast Packet Filtering. I had buntu 12.04.1 and CentOS 6.5 in my VM...
Ajeet Raina
Dec 7, 2014 57 sec read

Understanding /proc/cpuinfo

A hyperthreaded processor has the same number of function units as an older, non-hyperthreaded processor. It just has two execution contexts,...
Ajeet Raina
Dec 7, 2014 3 min read

How to setup vsFTP server on Linux?

FTP refers to File Transfer Protocol. By default, Red Hat supports vsftp. If you do minimal RHEL installation, you mightn’t have...
Ajeet Raina
Dec 7, 2014 39 sec read

How to increae Swap space under Linux

“Can Linux be installed without swap space?”. This question was asked to me on one of Linux System admin interview. It...
Ajeet Raina
Dec 7, 2014 56 sec read

How to setup Centralized Logging System on Linux?

I was just hanging around blogs until I cam across one nice piece of setting up centralized Logging setup.I thought to...
Ajeet Raina
Dec 7, 2014 1 min read

How to create password-less SSH for Linux

Sometimes you might need setting up Password-less SSH for running script or for application where you dont want to use password...
Ajeet Raina
Dec 7, 2014 31 sec read

Installing SMARTFOX Server Pro on Debian

SmartFoxServer is a massive multiplayer platform for building games, MMO communities, virtual worlds, realtime multiplayer games. To setup SFS, in short...
Ajeet Raina
Dec 7, 2014 35 sec read

Setting up a Simple Samba Share – Part II

In the previous article we saw the practical implication of setting up a samba share.In this article we will explore more...
Ajeet Raina
Dec 7, 2014 1 min read

Setting up a Simple Samba Share – Part I

Samba is an important component to seamlessly integrate Linux/Unix Servers and Desktops into Active Directory environments using the winbind daemon.In simple...
Ajeet Raina
Dec 7, 2014 1 min read

Fog – An Open Source Cloning Solution

If you are a system admin who is still sticking to Clonezilla, you must probably look out to try FOG –...
Ajeet Raina
Dec 6, 2014 6 min read

Introduction to Puppet..

Puppet is an IT automation tool which has already gained popularity among the system admins, developers and Cloud architects. Whether its...
Ajeet Raina
Nov 15, 2014 10 sec read

Getting Started with Ansible

Ansible is an IT automation tool. It can configure systems, deploy software, and orchestrate more advanced IT tasks such as continuous...
Ajeet Raina
Nov 15, 2014 2 min read

It was an Openstack Day…OSI 2014

Yesterday I attended Open Source India 2014 event which happened in NIMHANS Convention Center, Bengaluru. If you are new to OSI,...
Ajeet Raina
Nov 8, 2014 3 min read

Installing Skype on CentOS 6.5

Getting skype working on CentOS 6.5 has been a daunting job for lot of system administrators. Usually I found system administrators...
Ajeet Raina
Nov 5, 2014 49 sec read

Automating Oracle Weblogic Server installation through shell script

Automation always saves your considerable time. Especially when you have to follow the similar step for hundreds of machine, automated scripts...
Ajeet Raina
Nov 4, 2014 2 min read

How to integrate Redmine with Git?

Redmine built through Ruby on Rails has been impressive free and open source web-based project management. I have been Trac quite...
Ajeet Raina
Nov 2, 2014 2 min read

Running Hadoop on Ubuntu 14.04 ( Multi-Node Cluster)

This is an introductory post on Hadoop for new begineers who want step by step instruction for deploying Hadoop on the...
Ajeet Raina
Nov 1, 2014 7 min read
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