ACM Certificate Request Stuck in Pending

If you're reading this then you've probably been stuck with a pending ACM Certificate when using DNS validation. Most likely you have a more complicated setup than just aws meaning you're also using 3rd party software. In this article I'll go over how to get a close-to-instant issuing of the ACM Ce…


Connecting to RDS via Parameter Store configApplication on ECS #4

In this article we will go over creating and connecting to a database from an application deployed to ECS Fargate Containers. First we will need to create an RDS instance and store the database credentials, then we will update the CI/CD pipeline in order to perform database migration whenever new v…


Passwordless authentication flow in Cognito User Pool

Following up on setting up a custom mailer in cognito we are going to configure and implement custom authentication flow for AWS Cognito User Pool. To do that we will use the cognito stack created in the previous article, change the authentication configuration and implement custom lambdas to han…


Setup Cognito User Pool with custom emailing service

In this article we will go over creating a user pool, along with a user pool client to use for connecting to Cognito from our application. Instead of using the built-in AWS SES service for sending emails to the user, we will create a lambda that will use SendGrid for sending customer emails. Howeve…


CI/CD pipeline for ECS applicationApplication on ECS #3

Any modern application these days needs to have an automated deployment process. Usually it is setup via a webhook, other times we need to manually trigger the deployment, sometimes even requiring more than one person to approve. In this article we will learn how to build a CI/CD pipeline for an EC…


Adding SSL Certificate to Fargate appApplication on ECS #2

Previously, we were able to deploy a simple Nestjs web server to ECS fargate and serve it through a load balancer. However, that connection is not secure and the url is not very user friendly so in this article we will go over serving the application with our own domain name and securing it with a …


Deploying ECS Fargate ApplicationApplication on ECS #1

In this article we will build and deploy a simple NestJS application on ECS Fargate. To do that we will upload a Docker Image to our ECR Repository. Then we'll create a simple vpc where we will put our application. Next, we will go ahead and create ECS Cluster which will spin-up a Fargate Service f…


AWS Code Pipeline with S3 Deployment from Github RepositoryStatic Hosting #4

In this article we will learn how to create aws-cdk infrastructure for deploying a React application from Github using a CI/CD pipeline. The idea behind this infrastructure is to build an automated pipeline which will download the code from github whenever someone pushes new code to it. Then we wil…

Sharing a domain name across multiple AWS accounts

The other day I decided to separate my environments and I came across a problem. How do I get access to my domain from a different account, moreso, will I be able to get an SSL Certificate. Worried that it was going to be tricky, turns out it was super easy. Barely an inconvenience. By utilising su…

Create API Gateway with custom domain

Previously, we've learned how API Gateway works – focusing on microservice architecture. However, API Gateway also works well with serverless and in this article we'll go over how to build an api gateway with a custom domain and a lambda integration using aws cdk. Finished code is available on g…

API Gateway 101

API Gateway is a great "middle-end" to the backend and frontend. In this article we'll go over what exactly is an API Gateway, how it works, what are the benefits and where it fits in the building of modern applications. What is an API Gateway It is a service that sits between a client, and a colle…

NAT or gaining internet access in private networks

In this article we will build a VPC focusing on having Internet access inside a private network while keeping it isolated from the outside world. NAT, or a Network Address Translation, is an important component of many VPCs, most often used for gaining internet access within a private network. Less…

VPC and networking basics

There are two types of Cloud - public and private. The public ones such as Azure, AWS, Google Cloud Platform have what's considered a multi-tenant infrastructure, meaning multiple different clients can access the same cloud infrastructure and they share the resources that the cloud provides, howeve…

Constant IP addresses in the cloud

Every server on the cloud can have multiple IP addresses - public and private The public IP address is what's used when attempting to connect to the instance via ssh or instance connect When starting a server, we're gonna receive a private and, optionally, public IP addresses e.g and 55.12…

ECS: Tasks vs Services

ECS is an AWS container management service for running containerized apps on a cluster. There are two important concepts to understand in AWS ECS, which are Tasks and Services that we will compare in this article. Let's start off where tasks and services are alike and then move on to differences. B…

S3: AWS file storage solution

Most applications will need somewhere to store files in. For AWS that place is S3, which is a Simple Storage Service and it's one of the longest running services in AWS. It's been around for a very long time. S3 provides us with secure, durable, highly scalable object storage. As name suggests, it'…

AWS infrastructure

As of 2021 AWS consists of 25 Regions and 80 Availability Zones (AZ). There are 6 more Regions and 18 AZs planned for the foreseeable future. Availability Zone AZs are isolated locations within data centre regions from which cloud services originate and operate. Just imagine a massive warehouse ful…

The Cloud. What is it?

Everyone's heard of it but few people know what it is. Marketing people make it sound as though it's this ethereal, omnipresent thing that's always there when you need it. Reality is a little bit more dull than that. In short, the Cloud is just another person's computer. There are three big players…

Connecting to private RDS cluster via Bastion Host

When developing an infrastructure, sometimes we need to gain access to the production database, however, for security reasons databases are usually located in a private VPC without access to the internet. In order to gain access, we need to have a computer in the VPC that's able to access the datab…

Setup Aurora Serverless with CDK

This article looks into how to setup an RDS database cluster in a private VPC. Then we will connect to that database in an IDE using a Bastion Host as an SSH tunnel to gain access to the RDS instance. CDK setup is not in the scope of this article. To learn about it you can read AWS CDK: Getting St…

AWS CDK: Getting Started

AWS CDK stands for Cloud Development Kit and is an OSS framework for building/defining application architecture using popular programming languages Rather than trying to figure out the proprietary syntax in .json or .yaml files, you can use TypeScript, Python or Java with access to constructs t…

Fix Cloudfront 404 errors when visiting direct URLsStatic Hosting #3

Now, because we're using a REST API to communicate with the S3 bucket when visiting a direct URL it could actually show the error page instead. That's because in this example we're using gatsby which creates routes with folders and index files e.g /path/to/index.html but in the URL the route is a…

Dockerize a fullstack application

Dockerizing a Postgres, Nestjs & React application with separate development and test databases. Run with a single command thanks to docker-compose. In this approach the only public facing part of the application will be the frontend which will have access to the backend thanks to a shared network …

Creating a cloudfront distribution for an s3 bucketStatic Hosting #2

Thus far, we have registered a domain name and were able to launch a static website from an S3 Bucket using the aws-provided URL. In this part of the series we will create a Cloudfront distribution to increase website's availability across the globe as well as request and add an SSL certificate to …

Hosting a static website on Amazon S3 with SSLStatic Hosting #1

This series of short articles will cover several services needed for publishing a static website on AWS. Starting from registering a domain name in Route 53 Domain Registrar, configuring a S3 bucket for static hosting, deploying a cloudfront distribution, adding an SSL certificate, creating A-Recor…

Route 53: Introduction into DNS

This article will cover what is Amazon's Route 53 service, what are the steps of navigating to a website and clearing up some of the jargon that is often associated with it, such as A Records, DNS, IP, TLD, SOA and more. Route 53 is Amazon's DNS web service, which is a collection of rules and recor…

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