Why we need to update an Image? ** Updated post ** How to update a Docker image with the new changes that we made in the container? Yeah, we all know that, the Docker image is the core part of…
DevOps Hacks!
How to convert or concatenate integer with string variable in Python?
Convert int to str. Simple way to concatenate integer and string variables – Python. In some cases, you have to concatenate integer variables to string variables in your Python script. You can not do this by simply using the (+) sign. In…
What is a Linux container?
An intro to Linux containerisation. Basic: Containerisation helps to isolate processes. You can run your App/Services as an isolated process, running from a distinct image that provides all files necessary to support the processes. Basically Linux containers are OS level virtualisation…
Setup/configure a three node Elasticsearch cluster on CentOS 7
Elasticsearch is a widely using Search Engine and it’s other use cases are log analytics, full-text search, security intelligence, business analytics etc. It’s open source, you can set it up as a cluster on your own servers. In this article,…
Install PuppetDB on CentOS 7
What PuppetDB can do in your architecture is unbelievable… Yeah!! I started learning the Puppet since few months ago and it’s quiet interesting. And the interesting part is the PuppetDB. It’s a puppet module to store agent nodes details. That…
Dockerize your NodeJS app with Nginx as reverse proxy
Normally Dockerizing the Node application is a simple task. We can use the direct on-build images available in Docker hub directly in most cases. That Docker image is enough to deploy the NodeJS application. All versions of on-build Node image…
Docker tutorials – introduction part 2
In this blog post, we are continuing the introduction part on our Docker discussion. I will try to include more commandline usages for managing Docker containers. Managing Docker containers via command-line is very important. I will try to explain the details…