Published inITNEXT·Mar 27Terraform Cleaner — A Tool to Detect Unused Variables and Locals in Your ModulesHave you ever worked on a legacy Terraform project with dozens of modules, especially when the project has a lot of technical debt? Refactoring can be quite challenging, right? This is a common scenario that we often encounter when joining a team to improve the usability of Terraform. To start…Terraform2 min readTerraform2 min read
Published inITNEXT·May 27, 2022The comprehensive guide for your AWS VPC cross communication (peering, sharing, transit gateway, etc…)As a developer and a cloud architect, the network side took me the most time to master. But after working on multiple projects in small to huge companies, I wanted to document the different approaches to building, managing and communicating across VPCs along with their pros and cons. …AWS6 min readAWS6 min read
Published inITNEXT·Dec 9, 2021Deploy your react app on Backblaze and Cloudflare with Github ActionsThere are multiple ways to deploy static webapp. The advantage of being static is that a simple object storage is enough to serve your pages. …Backblaze4 min readBackblaze4 min read
Published inITNEXT·Oct 18, 2021How to add some caching in your lambdas without external service — aka stateful lambdasDo you know that you can keep some data persistent between different lambda calls? This is useful in case you want to store a temporary cache or speed up each invocation. Let's see how lambdas work under the hood and how we can take advantage of it. Use Case 1 : Persistence Today, I was…AWS Lambda3 min readAWS Lambda3 min read
Published inITNEXT·Jan 30, 2021How to easily create an HTTP 301 redirection with AWS API GatewayA few weeks ago I rewrote a lambda function for serving a swagger UI. Code is available here https://github.com/sylwit/aws-serverless-swagger-ui. Use Case The use case is pretty explicit, every request you need to do a redirect. I needed to do this because of a Gateway restriction where the root of a {proxy+} resource…AWS Lambda3 min readAWS Lambda3 min read
Published inITNEXT·Dec 17, 2020Secrets injection at runtime from external Vault into Kubernetes — POCWhen you work in a multi cloud environment, you can't always use AWS secrets manager for storing all your secrets. Hashicorp Vault is an awesome solution for storing and managing your secrets. In this POC I will show how you can easily and directly inject secrets into your pods thanks…Vault4 min readVault4 min read
Nov 23, 2020How to measure latency with curlWhen you deploy or migrate new infrastructure it can be useful to test the application's performance. Curl is often used to easily debug web requests. …Curl2 min readCurl2 min read
Aug 10, 2020How do I easily manage all my AWS credentials with AWS-VaultWether you are a consultant working with multiple clients or a devops in a company working on different projects with different stages, you surely have to deal with several AWS users credentials. aws-cli allows you to create different profiles for storing them but today I'd like to introduce a small…AWS3 min readAWS3 min read
Oct 3, 2019How to block a country to access your site behind CloudflareRecently a client has an increasing number of fake transactions at his shop. The buyer was using paypal pro to buy cheap items. …Cloudflare2 min readCloudflare2 min read
Apr 2, 2019How-to start a production ready Kubernetes cluster in AWS with Kops and TerraformYou want to start a brand new K8S cluster and you've heard about Kops and Terraform but you don't really know how to use them. Here is a step by step tutorial to quickly start a cluster while managing your infrastructure as a code. We first need to install the…AWS5 min readAWS5 min read
