Many vendors require you to have a static IP address for your application. Such that all requests to their API must originate from an allow-list of IP addresses. This means we need to force egress traffic from our Lambda functions through a static IP address. Sometimes, they even mandate that you use a static IP …
Static IP for Lambda: ingress, egress and bypassing the dreaded NAT Gateway Read More »
Every now and then you are faced with an awkward situation where you need to wait for a slow HTTP response and it can take more than 15 mins. Using Lambda is impractical because of the 15 mins timeout, and very cost ineffective because you will be paying for all that idle time by the millisecond.
If not Lambda, what’s the most serverless way for you to wait for a sloooow HTTP response?
It’s been a few years since I launched the “Complete Guide to AWS Step Functions” and “Learn you some Lambda best practice for great good!“. And given the diminishing value of these early courses I feel it’s only right that I stop charging for them. So from now on, you can sign up for these …
FREE online courses to learn Lambda and Step Functions Read More »
I had a really good question from one of my students at the Production-Ready Serverless workshop the other day: “I’m reacting to S3 events received via an SNS topic and debating the merits of having the Lambda triggered directly by the SNS or having an SQS queue. I can see the advantage of the queue …
SNS to Lambda vs. SNS to SQS to Lambda, what are the trade-offs? Read More »
The PrimeVideo team’s move from serverless caused much stir, but most people got it wrong because they read the article with tinted glasses.
This is what they actually said.
~~~~~~~~~ UPDATE 02/08/2023: EventBridge Schedule now supports automated deletion upon completion. So the problem and solution discussed in this post is no longer relevant. Please see the announcement here. ~~~~~~~~~ The launch of EventBridge Scheduler was one of the highlights for me for re:Invent 2022. Finally, we have a scalable service that lets us …
The biggest problem with EventBridge Scheduler and how to fix it Read More »
Many software engineering concepts appear in different contexts. Modularity, the single-responsibility principle and separation of concerns are just a few examples that come to mind. They apply equally to how we write code, architect our systems and organize our teams. In this post, let’s discuss three ways we can control the concurrency of a serverless …
3 ways to control concurrency in serverless applications Read More »
re:Invent is almost upon us. Judging by the things that had been announced ahead of re:Invent, one can’t help but be excited about the main event itself! Here is a list of the serverless-related announcements so far that you should know about. Payload-based message filtering for Amazon SNS Here’s the official announcement. This is arguably the …
The biggest preinvent serverless announcements you may have missed Read More »
How Lambda pricing works When it comes to cost, Lambda charges you based on the amount of memory you allocate to the function and how long this function runs for by the millisecond. And it also charges you a fixed fee of 20 cents per million invocations. source: https://aws.amazon.com/lambda/pricing There can be other costs involved, …
An interesting question came up on the AppSync Masterclass forum, and it highlights a common way you can get into CloudFormation circular dependencies. In the CloudFormation stack, there is an AppSync API, which uses a Cognito User Pool for authentication and authorization. When a user signs up, the app should fire an update on a …
How to work around CloudFormation circular dependencies Read More »
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