2015 – Collabnix

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