Tag lambda

Calling AppSync GraphQL from Lambda

Calling AppSync GraphQL from Lambda

AWS AppSync provides an easy way to run a GraphQL API that triggers AWS Lambda functions and other AWS services. If you start with AppSync, you likely have existing systems running next to it. Sooner or later, you want to call the GraphQL API from your ...

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Download YouTube videos with AWS Lambda and store them on S3

Download YouTube videos with AWS Lambda and store them on S3

Recently, I was faced with the challenge to download videos from YouTube and store them on S3. Sounds easy? Remember than Lambda comes with a few limitations: 512 MB of disk space available at /tmp 3008 MB of memory 15 minutes maximum execution time ...

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Customized rate limiting for API Gateway by path parameter, query parameter, and more

Customized rate limiting for API Gateway by path parameter, query parameter, and more

API Gateway provides a feature to limit the number of requests a client can make per second (rate) and per day/week/month (quota). Rate limiting is very useful to protect your system from resource starvation caused by a client flooding your system with ...

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Rich Social Sharing with single page applications hosted on S3 and delivered via CloudFront

Rich Social Sharing with single page applications hosted on S3 and delivered via CloudFront

You undoubtedly heard about single page applications (SPA) written with frameworks like Angular or React. One of the benefits of this approach is the possibility to host the static files (HTML, js, CSS, etc.) on a simple storage solution like S3 and put...

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Introducing AWS Lambda

Introducing AWS Lambda

You don’t need a virtual machine to run your own source code any more as AWS Lambda offers execution environments for Java, JavaScript (Node.js), C#, Go, and Python. All you need to do is to implement a function, upload your source code and configure th...

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Your Lambda function might execute twice. Be prepared!

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when scheduled Lambdas execute twice, SNS messages trigger an invocation three times, your handmade S3 inventory is out of date because events occurred twice?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...

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Send CloudWatch Alarms to Slack with AWS Lambda

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, ...

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Passwordless database authentication for AWS Lambda

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...

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Engaging your users with AWS Step Functions

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 ...

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The Cloud Switch: IoT Button, Lambda, and CloudFormation

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...

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Incident Management for Slack

Team up to solve incidents with our chatbot marbot. Never miss a critical alert. Escalate alerts from your AWS infrastructure among your team members. Strong integrations with all parts of your AWS infrastructure: CloudWatch, Elastic Beanstalk, RDS, EC2, ...

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