AWS docs explain How Spot Fleet Weighting Works under the “Spot Fleet Instance Weighting” section. I’ve read through the doc a few times now, and even so, when I come back to it months later, it still requires some mental wrangling to remember how it works. Been using some “mental” rules to understand how Spot Fleet Weighting works more quickly. Hopefully, you find these notes helpful also.

One of the biggest game-changers to spot instances are spot fleets. I mentioned how you could save 50%-90% when you take advantage of spot instance pricing in: How Does Spot Pricing Work? Spot fleets is where things get even more interesting. With a normal spot instance request, you place a bid for a specific instance type in one specific AZ and hope you get it. With spot fleets, you can request a variety of different instance types that meet your requirements. Additionally, you can spread your spot fleet bet across multiple AZs to increase the likelihood of getting your instance fulfilled. It’s like playing rollette and being able to bet a single chip on multiple numbers. Insanely cool! The method dramatically increases the chances of you getting instances available at your spot bid price. Like I said, game-changer.

Have you ever been asked to deploy a branch of code to the staging or uat environment but cannot because the environment is currently in used by someone else or another feature? Usually, you end up having to wait until the environment free. Ultimately, after this happens often enough a common request is to build additional environments. This can take some time though, so you still have to wait.

This is an introductory guide to ufo, an ECS deployment tool, with AWS Fargate. Ufo helps you deploy Docker images to AWS ECS. With Fargate, you can run docker containers without having to manage servers, for an interesting “serverless” option.

This is an introductory guide to ufo, an ECS deployment tool. Ufo helps you deploy Docker images to AWS ECS quickly. One pretty neat thing about ufo is that it provides direct access and control to the ECS Task Definition. So you can customize your ECS container options to your heart’s content. We’ll also talk about some of the resources that ufo creates.

There are some pretty big changes for ufo version 4. Here’s what’s new: Fuller CLI Toolkit Commands Load Balancer Support Updated Tutorial Guide Security Groups Improved Fargate Support Extra Env Support CloudFormation Implementation Upgrade Guide

Once a developer came up to me and told me that he was ready to deploy, but the deploy required migrations be run. He asked me an innocent question, how should he run migrations. Embarrassingly, because we were still evolving our tooling for the new infrastructure, we did not have a process for this simple task. We came up with an ad-hoc process that was honestly pretty terrible. It went like this:

Amazon EC2 Container Service, ECS, is an AWS service that provisions and manages Docker containers on a cluster of EC2 instances. As with most of AWS services, it is great and simply requires a little tooling wrapped around it to create a smooth flow. Ufo is a simple tool that makes building and shipping Docker containers to AWS ECS super easy.