Are you a tourist and do you plan to visit Paris ? If it is the case, chances are that you will search for spots where you can eat some food or have a drink. …

Here is how you can create and deploy your own AWS Lambda Java function in less than 1 minute (with Linux). First, let’s install the JDK: sudo apt-get update sudo apt-get install -y default-jdk Then let’s create a working directory mkdir HelloWorldFunction cd HelloWorldFunction Let’s create now the source code…

While creating demos for the AWS service Amazon Cloudfront, I had to configure a Cloudfront origin (a Linux VM in that case). To understand some features of Cloudfront, I needed the origin (Linux VM with Apache installed) to display information about the request (such as the headers and body). That’s…

Let’s create the private key first openssl genpkey -algorithm RSA -out private-key.key From the private key, we can derive the public key if we want openssl rsa -in private-key.key -pubout -out public-key.key Let’s create the CSR (Certificate Signing request) openssl req -key private-key.key -new -out certificate-signing-request.csr Let’s check the CSR https://certlogik.com/decoder/…

Hello everyone, the purpose of this blog post is to illustrate how a “scan” operation in DynamoDB works. Here is the big picture: In this scenario, a client is making a scan request to a DynamoDB table. In the scan operation, an optional limit parameter can be used which is…

First step, let’s create an anomaly detector model on a specific CloudWatch metric (EC2 Average CPUUtilization for an instance): aws cloudwatch put-anomaly-detector — namespace “AWS/EC2” — metric-name “CPUUtilization” — dimensions Name=InstanceId,Value=i-0345489963224c1a3 — stat “Average” We can list our Cloudwatch anomaly detectors for the CPUUtilization of all our EC2 instances with aws cloudwatch describe-anomaly-detectors — metric-name “CPUUtilization” — namespace “AWS/EC2”

Download and install the stress test tool sudo amazon-linux-extras install epel -y sudo yum install stress -y Launch the stress test in background (for 800 seconds in that example) sudo stress --cpu 8 --timeout 800 & Check the stress test processes with the top command top Manually stop the stress test (if needed) sudo killall stress Check the EC2 CPU metric in Clouwatch (protip, enable detailed monitoring)

Here is a short story to illustrate how requests go through API Gateway using AWS Lambda (with the Lambda Proxy Integration). The story is divided in 4 parts: 1) The big picture (no error) 2) In case of an error in the code of the Lambda 3) In case of an error…

AWS Cloud9 is an IDE that lets you write, run, and debug your code with just a web browser. The purpose of this story is to visually show / explain how it works and what is in my opinion the most important Cloud9 concepts to grasp (regarding permissions, networking, …). Firstly, The big picture 🌔 …