Blogs

The net/http package in Go offers a powerful set of tools for constructing HTTP servers to handle incoming requests and send responses. In this article, we’ll dive into setting up a basic HTTP server. Before we delve into the specifics, let’s familiarize ourselves with a couple of key terms: Multiplexer (or Mux): This is an essential component of an HTTP server that routes incoming requests to the appropriate handlers based on the requested paths or URLs. we will see this in detail in upcoming posts. With this foundation in mind, let’s explore how the net/http package simplifies the process of creating an HTTP server. ...

While working with route53, I came across a couple of DNS records which were new to me. There are several types of DNS (Domain Name System) records, each with a specific purpose. Here are some of the most common types: A record (Address record) Maps a hostname to an IPv4 address. example.com IN A 192.0.2.1 AAAA record (IPv6 Address record) Maps a hostname to an IPv6 address. example.com IN AAAA 2001:db8::1 CNAME record (Canonical Name record) Maps an alias hostname to the true hostname (canonical name). ...

fmt is one of the essential packages in Golang. fmt stands for “format.” This package allows us to format strings, print output, and interact with the standard input/output streams. In this blog post, we will explore the key functionalities of the fmt package. you can import the package as shown: import "fmt" Printing to standard output There are various functions available for printing such as fmt.Println , fmt.Print and fmt.Print Println This will print a line with a new line at the end ...

working with open-source Go modules is more straightforward, you add them in Go mod files and run Go mod commands and it just works. Recently, I came across private Go modules usage in one of my projects at work and thought of writing about it so it can help someone :) if you have only one repo then you can do export GOPRIVATE=github.com/yourorg/yourrepo If you have more than one private module, you can run the following: ...

Unlike other Languages, Golang does not have multiple looping constructs. It has only one for. But, I think that’s enough to cover all the use cases, let’s see different variations of loops. Basic Loop In basic for loop, there are 3 elements, initialization: i := 1 condition: i<=5 post: i++ loop will continue to run until the postcondition is true. for i := 1; i <= 5; i++ { fmt.Println(i) } output: ...

In this post, we will see different Kubernetes clients, the client is something that you can use to talk to the Kubernetes cluster. Mainly, there are 3 ways to talk to a cluster: kubectl Console/Dashboard programmatically using clients The Kubernetes community maintains clients in various languages in this repo. Since Kubernetes is in Golang, a client library known as client-go is widely used. But there are clients available in other interesting languages :) ...

Terraform is a popular tool for Infrastructure as a Code practice to manage Cloud Infrastructure using declarative ways. As Infrastructure grows, the number of projects grows, and there’s a fair chance that you may not have the same terraform versions among your projects. There can be various reasons for it. As a result, you may need multiple terraform versions installed on your machine, which can get a little tricky. Worry not. There’s an open-source project to solve this problem tfenv. ...

In a previous blog post, we have seen how to enable SSM Session for EC2 instances to ditch SSH and enable safe and secure shell access. In this blog post, we will go one step further towards security and encrypting our SSM sessions from EC2-managed nodes and the local machines of users with the help of the KMS key. Creating the KMS key To encrypt the sessions in SSM, we will first need to have the KMS key. aws kms create-key --description "SSM Session Manager Key" --origin AWS_KMS This will create a KMS key for us. ...

To access EC2 instances, SSH has been the preferred way for many years. But this way has its downsides, such as managing the keypairs, etc. Recently, I came across a new safe and secure way to access instances, even from a Web browser and from the terminal, which is SSM. Let’s learn more about SSM and how to set it up. What is SSM? SSM stands for Systems Manager, a set of tools such as Session manager, State manager, patch manager, etc. ...

In a previous blog post, we have seen how to enable SSM Session for EC2 instances to ditch SSH and enable safe and secure shell access. In this blog post, we will go one step further towards security and encrypting our SSM sessions from EC2-managed nodes and the local machines of users with the help of the KMS key. Creating the KMS key To encrypt the sessions in SSM, we will first need to have the KMS key. aws kms create-key --description "SSM Session Manager Key" --origin AWS_KMS This will create a KMS key for us. ...