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Tracing an HTTP request

What to do when customers complain about high latencies or server-side errors? How to find out which part of your infrastructure is causing trouble? Is something wrong with CloudFront, the ELB, or your web application? Our video demonstrates how to use...

Getting started with IPv6 on AWS

In mid-2019, AWS paid ~$108M to access 4 million IPv4 addresses from Amateur Radio Digital Communications - $27 per IP address. The reason why AWS spends so much money on IPv4 addresses is simple: There are no free IPv4 addresses that regional internet ...

How to enable CORS on API Gateway with Lambda proxy integration?

When building single-page applications (SPA), you will sooner or later stumble upon Cross-Origin Resource Sharing (CORS). In short, a browser does only allow requests to the same same origin (domain, protocol and port), that was used for the initial req...

Unboxing Amazon Timestream

My first job after graduation in 2011 was all about time-series data. My first task was to connect an exchange data feed with our on-premises time-series database (we used kdb+ by KX Systems). Whenever the exchange matches a buyer and seller, a trade is...

Caching on AWS 101

Oftentimes, the idea of adding a caching layer arises when users start complaining about the performance of an application. Adding a cache to your architecture does not solve all problems — especially when implementing that change under pressure to fix ...

Have you replaced IAM Users with AWS SSO yet?

The most secure option to isolate workloads from each other is to use multiple AWS accounts. Many organizations use different AWS accounts for testing and production, for example. The more AWS accounts you use, the more complicated it gets to manage use...

Amazon ECR vs. Docker Hub vs. GitHub Container Registry

Have you worked with a Linux package manager like apt or yum before? A container registry is similar, but instead of packages, it distributes container images. A container registry is a crucial aspect of a containerized workflow and infrastructure. This...

I'm losing trust in AWS. SNS is broken for 65 days.

I’m frustrated. A major service of AWS is broken for 65 days. The Simple Notification Service (SNS) delivers messages to HTTPS subscriptions with a delay of more than 30 minutes. That issue impacts our SaaS business. But AWS did not fix the problem yet....

AWS needs a bug bounty program

A few weeks ago, while evaluating an AWS service, I stumbled upon an issue with the way the AWS API evaluates IAM policies for a particular IAM action. I contacted aws-security@am&...

Record AWS API calls to improve IAM Policies

Have you ever looked at an IAM policy and wondered: Is it really necessary to grant access to this specific action? Or do you need to know which API calls a legacy or 3rd party application is actually sending to come up with a secure IAM policy? CloudTr...