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AWS

Network Access Control List (NACL)

Network Access Control List aka NACL aka Network ACL is like a firewall for filtering traffic from and to subnets. It is an optional layer of security. This means there is no need to create a new network access control list and associate it with the subnet. AWS creates default network ACL in all VPCs. […]

Aniket Kulkarni 3 years agoAugust 15, 2021

AWS

Properties validation failed for resource Error [pattern] – Cloud Formation

There are instances when I was deploying Cloud Formation templates and I encountered errors. This is a really common mistake when you are dealing with complex CFT. If the Cloud Formation template has a lot of properties then it is really hard to define all of those from scratch. This is where sometimes I went […]

Aniket Kulkarni 3 years agoAugust 12, 2021

AWS

Security Groups vs Network Access Control Lists

Network Access Control List aka Network ACL is a way to control the inbound and outbound traffic of one or more Subnets. It acts as Firewall for subnets. It provides the additional layer of defense if Security Groups are too permissive. On the other hand, the Security Group is also used to control the traffic. […]

Aniket Kulkarni 3 years agoAugust 15, 2021

AWS

AWS DynamoDB Basics

DyanmoDB is a fully managed NoSQL database service. There are a lot of great features provided by AWS. It is very fast and highly scalable. Performance up to single-digit milliseconds latency, given that partition key, is designed very well. There is no need to worry about the storage space. It comes with an unlimited storage […]

Aniket Kulkarni 3 years agoAugust 24, 2021

Commands

Linux Command Basics

Linux is an open-source operating system. I personally feel the power of Linux is using the commands. The Linux command line is a text interface to your computer. Often referred to as the shell, terminal, console, prompt, etc. In this post, I am going to explain the most commonly used Linux commands. ps – Process Status To […]

Aniket Kulkarni 4 years agoAugust 14, 2021

Concurrency Java

Java Future and CompletableFuture

Future and CompletableFuture are used in Java for Asynchronous processing of tasks. In this blog post, I am going to cover Java’s Future and CompletableFuture differences and their usage through an example. We will go through the important methods available in interface Future and class CompletableFuture. Let’s get started. Interface Future Introduced in Java 1.5 […]

Aniket Kulkarni 4 years agoAugust 2, 2021

Build Tool Maven

Install third party JAR not available in MAVEN central

This allows to install the third party JAR using Maven build plugin

Aniket Kulkarni 4 years agoAugust 2, 2021

Commands

Git Commands you should know

In this post, I am going to discuss useful Git Commands. I like using Git commands instead of the Git GUI. Here are the some commands, which I came across my IT journey. Firstly, I will start with simple yet powerful branching in Git. Followed by committing, pushing the code to the repository. Frequently used, […]

Aniket Kulkarni 4 years agoAugust 2, 2021

Code Build

AWS Code Build

What is CodeBuild?It is fully managed build service. You don’t need to spend time in provisioning the hardware or any VM to setup. You just have to focus on the Build logic. CodeBuild – DockerCode build leverages Docker under the hood. This means you are free to use millions of docker image for your testing. […]

Aniket Kulkarni 4 years agoAugust 2, 2021

CI/CD

What is CI/CD?

In this post, I am going to explain about CI/CD and related services offered in AWS. It is more of automating daily common IT operations. There are various tools available in the market for all these operations. Let’s look at the concepts: CI – Continuous Integration CD – Continuous Deployment CD – Continuous Delivery

Aniket Kulkarni 4 years agoAugust 2, 2021