Discover how much Fargate Spot could save you on your AWS bill with this price comparison between 100 Fargate Spot and 100 Fargate containers. Did you know you could save money in AWS by switching from Fargate to Fargate Spot? If you’re using ECS, Fargate Spot offers significant cost reductions by using spare capacity in […]
Setup Spring Boot behind a load balancer using the X-Forwarded headers
If you’ve ever deployed Spring Boot behind a load balancer, you might be aware of issues coming from differences between the request into the load balancer and the request into your application. These requests will often have a different protocol, host, or port. If Spring Boot isn’t correctly setup it can lead to all sorts […]
Running Jenkins jobs in AWS ECS with slave agents
So you’ve setup your Jenkins instance in AWS ECS? And people start using it. Awesome! Hold on a sec though, loads of people are using it. So many that Jenkins is grinding to a halt with all the running jobs. Thankfully, we can offload those jobs to run in a completely separate container called a […]
VPCs, subnets, and gateways – fundamentals for working with containers in AWS
Let’s be honest, for most developers getting their software written and working on their own machine and maybe a test environment is the main priority. Deploying to production? Ah, that’s another team. All the AWS network ‘stuff’ – VPCs, subnets, gateways? Someone else’s business, right? Secondary to the contents of the holy Docker image and […]
AWS SNS for CloudWatch alarm email notifications
Do you want to learn how to setup email notifications to tell you about important events that happen in CloudWatch? In this article you’ll discover how to setup the AWS Simple Notification Service (SNS) to send you emails whenever a CloudWatch alarm gets triggered. We’ll run through a full working example, setting up the alarm […]
Shipping AWS EC2 logs to CloudWatch with the CloudWatch agent
Want to learn how to monitor EC2 logs automatically without having to manually log into servers? Well, in this article we’ll explore how to setup the CloudWatch agent on an EC2 instance to easily stream your logs to AWS. We’ll also setup a simple alarm for when the logs contain certain text that we want […]
When to use an AWS S3 VPC endpoint
What is an S3 VPC endpoint? To understand what an S3 VPC endpoint is, we first need to know what problem it solves. Imagine we want to get access to S3 from an AWS resource. In the example below, we have an EC2 instance that needs to copy a file from an S3 bucket: This […]
Deploying a Spring Boot application into AWS with Jenkins (part 3 of microservice devops series)
Welcome to the third and final part of this three part series where we take a Spring Boot application from inception to deployment, using Docker and all the current best practices for continuous integration with Jenkins. In this final article, we’ll take the Docker image we pushed to Docker Hub in Part 2 and deploy […]
When to create different subnets in AWS VPCs
Configuring subnets and VPCs can be confusing when you’re setting up AWS infrastructure. There’s plenty of documentation about what subnets are, and how to create them, but not necessarily when and why you’d create them. In this article you’ll learn why you’d want to create multiple subnets in the first place. First off though, here’s […]
Recursive AWS Lambda Functions in Node.js JavaScript
AWS Lambda functions are a great way to execute short-running processes without worrying about what hardware they’re going to run on. Sometimes though, we have a requirement to execute a longer-lived process, but unfortunately AWS imposes a 15 minute execution limit. Fear not though, because in this article you’ll learn how to write recursive Node.js […]