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Meet me at AWS re:Invent and have breakfast with me

If you attend this year’s AWS re:Invent, this blog post is for you! I will invite a group of people to have breakfast together on Tuesday morning (Nov 28, 9-10am) offside the noisy halls where you could get your complimentary re:Invent breakfast. Food a...

Your Lambda function might execute twice. Be prepared!

Are you confused when scheduled Lambdas execute twice, SNS messages trigger an invocation three times, your handmade S3 inventory is out of date because events occurred twice? Bad news: Sooner or later, your Lambda function will be invoked multiple time...

Send CloudWatch Alarms to Slack with AWS Lambda

As we all know, things go wrong. That’s why monitoring and alerting are essential topics. Wouldn’t it be nice, if problems in your AWS account would show up in Slack? So you can react quickly while using your favorite messaging tool. In this blog post, ...

Passwordless database authentication for AWS Lambda

Does your serverless application need to access an RDS database? Where do you store the username and the password required to authenticate with the database? Storing the password in plain text within your source code should not be an option. Same is tru...

Engaging your users with AWS Step Functions

Imagine a new user signs up for your service. You send an automated welcome message to your new user explaining how the service works. But what if your user struggles with the first steps? You want to send a second email with additional information. To ...

A simple way to manage log messages from containers: CloudWatch Logs

Gone are the days when administrators logged into their machines to access log files. Containers and virtual machines are launched and terminated dynamically to scale based on demand, to deploy new versions, or to recover from failure nowadays. Collecti...

Amazon Web Services in Action Second Edition is in the works

We released our book Amazon Web Services in Action in September 2015. But AWS didn’t rest on its laurels. Every day, new features are released that can make your life easier. It’s time to revise our book so you can continue to build effective solutions ...

A non-technical way to reduce your AWS bill within 5 minutes

Are you looking for ways to reduce your monthly AWS bill? Usually, I do share technical tips and tricks to do so: 3 simple ways of saving up to 90% of EC2 costs or Performance boost and cost savings for DynamoDB. But today, I will share a nontechnical w...

The Cloud Switch: IoT Button, Lambda, and CloudFormation

Last one out turns off the light. What works for boring light bulbs can be adopted to your cloud infrastructure as well. Are you using a development and testing environment that is only used during working hours? Why not turning off the cloud infrastruc...

CloudFormation vs Terraform in 2022

The most reliable way to automate creating, updating, and deleting your cloud resources is to describe the target state of your infrastructure and use a tool to apply it to the current state of your infrastructure (see Understanding Infrastructure as Co...