Ajeet Raina

  https://ajeetraina.collabnix.com Docker Captain, ARM Innovator & Docker Bangalore Community Leader.

     



377 Stories by Ajeet Raina

Top 100 Docker Interview Questions & Answers

Are you looking out for Docker related Interview questions categorised into Beginners, Intermediate & Advanced Level users? If yes, then you are at the...
3 25 min read

Switching Docker 18.09 Community Edition to Enterprise Engine with no downtime

  Under the newer Docker Engine 18.09 release,  a new feature called CE-EE Node Activate has been introduced. It allows a user to perform an...
1 3 min read

6 Things You Should Know before Dockercon 2018 EU

  At Dockercon 2018 this year, you can expect 2,500+ participates, 52 breakout sessions, 11 Community Theatres, 12 workshops, over 100+ total sessions, exciting...
2 4 min read

How to become a DevOps Engineer?

  Who is DevOps engineer?          DevOps engineers are a group of influential individuals who encapsulates depth of knowledge and years...
68 1 min read

Kubernetes Hands-on Lab #4 – Deploy Prometheus Stack using Helm on Play with Kubernetes Platform

  Let’s talk about Kubernetes Deployment Challenges… As monolithic systems become too large to deal with, many enterprises are drawn to breaking them down...
2 6 min read

Building Helm Chart for Kubernetes Cluster running on Docker Enterprise 2.0 using Docker-app 0.6.0

  Docker-app allows you to share your applications on Docker Hub directly. This tool not only makes Compose file shareable but provide us with simplified...
2 5 min read

Installing Helm to deploy Kubernetes Applications on Docker Enterprise 2.0 Made Easy

    Let’s talk about RBAC under Docker EE 2.0… Kubernetes RBAC(Role-based Access Control) security context is a fundamental part of Kubernetes security best...
2 8 min read

Kubernetes Hands-on Lab #3 – Deploy Istio Mesh on K8s Cluster

  Istio is completely an open source service mesh that layers transparently onto existing distributed applications. Istio v1.0 got announced last month and is...
1 7 min read

Kubernetes Hands-on Lab #2 – Running Our First Nginx Cluster

    Nginx (pronounced “engine-x”) is an open source reverse proxy server for HTTP, HTTPS, SMTP, POP3, and IMAP protocols, as well as a...
2 1 min read

Kubernetes Hands-on Lab #1 – Setting up 5-Node K8s Cluster

  Are you new to Kubernetes? Want to build your career in Kubernetes? Then Welcome ! You are at the right place. This blog post series...
1 2 min read

How I built Elastic Stack for Docker Swarm using Docker Application Packages(docker-app)

  Let’s begin with Problem Statement ! DockerHub is a cloud-based registry service which allows you to link to code repositories, build your images,...
1 4 min read

Getting Started with OpenUSM on Docker for Windows Platform

OpenUSM is a modern approach to Server Management, Insight Logs Analytics and Machine Learning solution integrated with monitoring & logging pipeline using Docker containers...
1 3 min read

2 Minutes to Docker MacVLAN Networking – A Beginners Guide

  Scenario:  Say, you have built Docker applications(legacy in nature like network traffic monitoring, system management etc.) which is expected to be directly connected to...
0 2 min read

Getting Started with Istio and Kubernetes | Step by Step Guide

If you’re a Developer and have been spending lot of time in developing apps recently, you already understand a whole new set of challenges...
1 1 min read

What’s New in Docker Enterprise Edition 18.03 Engine Release?

  A New Docker Enterprise Engine 18.03.0-ee-1 has been released. This is a stand-alone engine release intended for EE Basic customers. Docker EE Basic...
2 3 min read

5 Minutes to Run Your First Docker Container on Google Cloud Platform using Terraform

I still remember those days(back in 2006-07′) when I started my career as IT Consultant in Telecom R&D centre where I used to administer...
2 8 min read

A First Look at Docker Application Package “docker-app”

  Did you know? There are more than 300,000 Docker Compose files on GitHub. Docker Compose is a tool for defining and running multi-container Docker...
2 7 min read

Top 5 Most Exciting Dockercon 2018 Announcements

    Yet another amazzing Dockercon ! I attended Dockercon 2018 last week which happened in the most geographically blessed city of Northern California...
1 5 min read

Kubernetes Application Deployment Made Easy using Helm on Docker for Mac 18.05.0 CE

  Docker for Mac 18.05.0 CE Release went GA last month. With this release, you can now select your orchestrator directly from the UI...
1 7 min read

How to Get the Most Out of Dockercon 2018 – (June 12 – 15th, SF)

  In a recent survey of 191 Top Fortune 1000 executives, 69% of them believe that conference presents a wealth of networking opportunities which...
56 5 min read

Under the Hood: Demystifying Docker For Mac CE Edition

Docker is a full development platform for creating containerized apps, and Docker for Mac is the most efficient way to start and run Docker...
146 4 min read

Top 5 Exclusive Features of Docker For Mac That You Can’t Afford to Ignore

  Docker for Mac 18.04.0 CE Edge Release went GA early last month. This was the first time Kubernetes version 1.9.6 & Docker Compose...
60 5 min read

Demystifying Serverless & OpenFaas

Is Function a new container? Why so buzz around Serverless computing like OpenFaas?   One of the biggest tech trend of 2018 has been...
67 6 min read

Introducing OpenUSM – Simplifying Server Management & Insight Log Analytics using Docker containers

Its 2018 ! Let Containers Manage Your Datacenter.. Containers are changing the dynamics of modern data center. It is a growing technology that is...
53 6 min read

Under the Hood: Demystifying Docker Enterprise Edition 2.0 Architecture

The Only Kubernetes Solution for Multi-Linux, Multi-OS and Multi-Cloud Deployments is right here… Docker Enterprise Edition(EE) 2.0 Final GA release is available. One of...
1 5 min read

Docker’s Birthday Celebration in Bangalore – The Fifth Kind

“As you grow up, make sure you have more networking opportunities than chances, and more collaborative approach than just an acquaintance. Reason  ~ “Sharing...
59 2 min read

5 Minutes to Bootstrap Kubernetes Cluster on GKE using Docker for Mac 18.03.0

Docker 18.03.0 CE Release is now available under Docker for Mac Platform. Docker for Mac 18.03.0 CE is now shipped with Docker Compose version...
64 4 min read

Test-Drive Continuous Integration Pipeline using Docker, Jenkins & GitHub under $0

Are you new to CI/CD? Continuous Integration (CI) is a development practice that requires developers to integrate code into a shared repository several times...
1 3 min read

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 to switch between...
53 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, Docker Compose 1.180...
59 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 Release. You can...
57 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 same Docker platform....
2 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 is an open-source...
1 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 the first group...
1 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 open sourced by...
2 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 it has already...
2 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 is new plugin...
2 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 means that developers...
2 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 demonstrated NVIDIA Deep...
2 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”. Within few weeks...
1 3 min read

Running NVIDIA Docker in the GPU-Accelerated Data Center

It’s time to look at GPUs inside Docker container.. Docker is the leading container platform which provides both hardware and software encapsulation by allowing multiple...
1 6 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 cluster of Linux...
62 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 enabled? Can I...
1 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 it has already...
3 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 source, in any...
2 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, Moby is an...
1 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 you are System...
1 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 Manyata Embassy Business...
1 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 upcoming release. Few...
1 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 a lot of...
1 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”. While working on...
1 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 Linux Operating System...
1 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 Certification Program. What...
1 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 project.  With this...
1 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 assemble container-based systems....
2 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 when we say...
2 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 portable Linux Subsystem...
1 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 2017 and have...
2 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 “Portus” powered by...
2 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” – PWD in...
2 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 been subtle changes...
1 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 has been helping...
1 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 web application or...
2 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 to allow you...
1 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 considered as one...
1 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 mission to introduce...
1 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. Introducing Siri to...
2 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 64 bit quad-core...
68 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 Engine 1.12,Docker team...
1 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 hands with all...
1 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 generation Docker clustering...
1 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 is an integrated,...
1 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 highly dense data...
2 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 infrastructure that effectively...
2 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 like Docker Machine,...
2 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 OS X), easy-to-use...
1 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 Solomon Hykes for...
1 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, you have any...
1 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, Microsoft finally unveiled...
1 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 and swarm? How...
1 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 open source monitoring...
1 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 Raspberry Pi? Is...
1 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 1.12 Swarm Mode?...
1 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. Under 1.12.1 release,...
1 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 1.12 release. The...
2 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, a FIRST ARM...
1 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 Docker 1.12.0 which...
62 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 during DockerCon 2016.In...
64 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 available like hosted...
171 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 of Docker Engine...
67 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” feature rightly integrated...
65 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 engine.Docker’s new deployment...
1 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 around corner but the...
1 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 for managing containers....
0 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 flexibility in compute,...
1 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 the ability to...
108 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, followed by Notary...
0 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” – a new service...
1 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 times for a...
2 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 a general availability...
4 3 min read