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, …
As a consultant, I have helped a lot of clients with their architecture [1] and built a couple of serverless applications for clients from scratch. And the no. 1 question I get about serverless is around testing. “How should I test these cloud-hosted functions?” “Should I use local simulators?” “How do I run these in …
It’s been two years since I last wrote about Lambda layer and when you should use it. Most of the problem I discussed in that original post still stands: It makes it harder to test your functions locally. You will still need those dependencies to execute your function code locally as part of your tests. …
Lambda layer: not a package manager, but a deployment optimization Read More »
An interesting question came up in a conversation today: “How should I manage the Route53 DNS records in a multi-account environment?” Suppose you have configured an AWS Organization with different accounts for dev, staging and production environments. And you have registered the root domain for your application in the master AWS account. When working with …
How to manage Route53 hosted zones in a multi-account environment Read More »
In the last post I discussed my preferred approach for modelling multi-tenant applications with AppSync and Cognito. This approach supports the common requirements in these applications, where there are a number of distinct roles within each tenant. This approach (and others like it) works great when the tenants are isolated. But what if they are …
Building a custom IAM system has made me appreciate AWS IAM even more Read More »
Thank you to Josh for asking this question on the AppSync Masterclass forum. His original question goes like this: Let’s say I want to add a one-to-many relationship from Profile to a new property called “Tag” (a complex object with “name” and “color” properties) so a user can define their own Tags. I would also like a …
How to model one-to-many relationships with AppSync and DynamoDB Read More »
One of the most common questions I get is “How do I build a multi-tenant application with AppSync and Cognito?”. If you google this topic on the internet you will no doubt come across many different opinions. It’s a topic that we’ll soon explore in the AppSync Masterclass but I want to take this opportunity …
How to secure multi-tenant applications with AppSync and Cognito Read More »
In light of the recent Okta breach [1] there’s been renewed discussion about where Amazon Cognito fits into the picture. It’s a question my clients often ask me, so here are my two cents. The case for Cognito Integration with other AWS services Cognito’s tight integration with other AWS services such as API Gateway, AppSync and ALB is …
All the sessions during week 1 are available to watch on-demand now. You can access them via the official reinvent portal here. Here are my top picks for sessions to watch, in no particular order. “Building technology standards at Amazon scale” by Marc Brooker You can watch the session here, and here‘s my notes for the session. “Monitoring …
I’ve gotten a few questions about Aurora Serverless v2 preview, so here is what you need to know about Aurora Serverless v2 during preview. Q: Does it replace the existing Aurora Serverless offering? A: No, it lives side-by-side with the existing Aurora Serverless, which will still be available to you as “v1”. Q: …
What you need to know about Aurora Serverless v2, so far. Read More »
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