Nuts and Bolts

Everyone has opinions and thoughts. Here are some of ours.

Jets Tutorial: jets delete

This video tutorial demos the jets delete command. Since all the infrastructure is codified, deleting a Jets application is a straightforward process. What’s more interesting is that it is also easy to recreate the entire environment.

jets delete

For more info on the jets delete command, refer to its CLI reference.

Rails on AWS Lambda: jets import:rails --submodule

In the previous post: Jets Mega Mode: Run Rails on AWS Lambda, I covered how to get Rails running on AWS Lambda with Jets. In this video tutorial, I show you how to use the --submodule option for the same command we used to set things up previously: jets import:rails. Example:

jets import:rails http://github.com/tongueroo/demo-rails.git --submodule

Importing the Rails application as a submodule allows you to keep the Rails project in a separate repo. This allows you to manage the Rails project with a separate history and sync it with a Jets project when you want to. This is a useful setup if you are testing Jets Mega Mode Rails Support for an extended period of time.

Jets Mega Mode: Run Rails on AWS Lambda

Jets allows you to run Rails applications on AWS Lambda via Mega Mode. The name reminds me of a few things:

  • Mega Monolith: Rails applications can sometimes become a Majestic Monolith. Or sometimes it just becomes a Monolith 😁
  • Power Rangers Mega Mode: The Power Rangers can combine their Zords into one huge Megazord.
  • Mega Man: This superhero can change his arm to use different special weapons. One of the things that makes him Mega Man.

Mega Mode combines a Jets app and a Rack app together to allow you to run Rails on AWS Lambda with little effort. The docs for Mega Mode and Rails Support are on the Ruby On Jets site. Here’s a Live Mega Mode Demo. We’ll go through an example of Mega Mode and get a Rails application running on AWS Lambda in this post.

Jets Simple AWS Lambda Ruby Function

Jets supports writing simple AWS Lambda functions with Ruby. You define them in the app/functions folder. A function looks like this:

app/functions/simple.rb:

def handle(event, context)
  puts "hello world"
end

Continuous Compliance AWS Config Rules Implemenation with Jets Serverless Framework

In the previous post, AWS Config was introduced. We talked about how it can be used to obtain continuous compliance with your AWS account. In this post, we’ll implement a working example solution.

Continuous Compliance: AWS Config Rules Introduction

AWS is one of the greatest things since sliced bread. It empowers engineers to get things done quickly by enabling them to take control of the steering wheel and drive. With a simple AWS account, engineers can create resources, update security groups, and deploy their applications in rapid-fire fashion. The ease and power of AWS might make it seem like a security nightmare, but it’s actually the opposite. AWS provides the tools and controls to ensure everyone is following best practices, allows to you achieve a hardened security posture, and take compliance to a level that was never even thought possible before AWS: continuously.

Jets Tutorial Polymorphic Support Part 9: AWS Lambda Ruby

In this video tutorial, we cover Jets Polymorphic Support Ability. Jets allows you to write Lambda functions not just in Ruby but also in other languages like Node and Python. This can be useful if you have pre-existing Lambda code. You can re-use the code and and move on with life.

Jets Tutorial Different Environments Part 8: AWS Lambda Ruby

In this video, we continue the tutorials on the Jets Ruby Serverless Framework that adds Ruby support to AWS Lambda. We talk about the difference between Jets extra vs different environments. Different environments refer to development, staging, uat, production environments. Extra environments refer to instances of each of those environments. For example, development-1, development-2, development-3, etc.

Toronto Serverless Presentation: Jets Framework on AWS Lambda

Here’s the presentation I gave at the Serverless Meetup in Toronto on Jets: A Ruby Serverless Framework. We discuss how Ruby support at native speed was achieved. We learned a bit about how AWS Lambda works under the hood to understand how it works. 2 demos with a Jets application are also provide. We deploy it to Lambda with a single command.

Quick AWS Lambda Testing If Main Script Trick: Ruby, Python, Node

A quick way to test a Lambda function, is to add a little portion of code at the bottom of the script that tells it to run itself when it is the main script. The if statement means that the script will only run if it is ran directly vs being required as library.

Jets Tutorial Extra Environments Part 7: AWS Lambda Ruby

In this video, we continue the tutorials on the Jets Ruby Serverless Framework that adds Ruby support to AWS Lambda. We talk about a Jets concept called extra environments. With one environment variable JETS_ENV_EXTRA, we can create as many additional instances of environments as we wish. This helps when multiple people are asking to use the development, staging, or uat environment but cannot because it is currently used by someone else or another feature. Usually, you end up having to wait until the environment free. With this Jets concept you can create as many environments as required.

Jets Tutorial Function Properties Part 6: AWS Lambda Ruby

In this video, we continue the tutorials on the Jets Ruby Serverless Framework that adds Ruby support to AWS Lambda. We’ll demonstrate how to customize the properties associated with the Lambda functions that Jets creates. There are 3 ways to set function properties with Jets: at the function level, class level or application level. We’ll also explore the AWS Lambda console and shows how the Lambda function properties connect with Jets.

Jets Tutorial IAM Policies Part 5: AWS Lambda Ruby

In this video, we continue the tutorials on the Jets Ruby Serverless Framework that adds Ruby support to AWS Lambda. We’ll demonstrate how to customize the IAM policies and roles associated with Jets Lambda functions. IAM policies are important because they handle securing access to your AWS resources so it’s worth learning them. Jets provides you with fine-grain control over the IAM permissions at the function, class, and application level.

Jets Tutorial Background Jobs Part 4: AWS Lambda Ruby

In this video, we continue the tutorials on the Jets Ruby Serverless Framework that adds Ruby support to AWS Lambda. We’ll cover background jobs in this video. Using background jobs is a typical pattern that offloads processing outside of the web request-response cycle. Users will not wait for web pages to load if it takes too long, so background jobs are an excellent technique to keep slower work outside of the request cycle.

Jets Tutorial Debugging Logs Part 3: AWS Lambda Ruby

In this video, we continue the tutorials on the Jets Ruby Serverless Framework that adds Ruby support to AWS Lambda. We’ll cover something that is pretty important to know as a software developer: debugging. With Jets it’s pretty straightforward to look at the debugging logs both locally and remotely. Locally, the logs show up with the local running server. Remotely, the logs show up in CloudWatch Logs: available both on the AWS CloudWatch Logs console and the AWS Lambda console.

Jets Tutorial Deploy to AWS Lambda Part 2: AWS Lambda Ruby

In this video tutorial, we continue how to get to started with the Jets Ruby Serverless Framework that adds Ruby support to AWS Lambda. We’ll explore the AWS Lambda Console and API Gateway to show how the AWS resources map back to Jets application code.

Jets Tutorial An Introductory CRUD App Part 1: AWS Lambda Ruby

In this video tutorial, we cover how get to started with the Jets Ruby Serverless Framework that adds Ruby support to AWS Lambda. We’ll build the quintessential CRUD application, and more we’ll importantly explore and edit it to understand how it works.

AWS Lambda Ruby Support at Native Speed with Jets

AWS Lambda does not yet support Ruby. Though there are plenty of rumors that AWS is working on it. I’m pretty excited for the day when AWS releases official support for Ruby. Until that day arrives though, we must use a shim in order to add Ruby support to AWS Lambda. A shim is a function written in a natively AWS Lambda supported language that calls out to Ruby. Jets uses a node shim to add Ruby support to AWS Lambda. The neat thing is that Jets adds Ruby support to AWS Lambda at pretty much native speed.

Introducing Jets: A Ruby Serverless Framework on AWS Lambda

Jets is a framework that allows you to build serverless applications in a beautiful language: Ruby. It includes everything needed to build and deploy applications to AWS Lambda. I love working with Rails, Ruby and AWS; and wanted to work with something similar in the serverless world. So I built Jets.

How to Find the Current AWS EC2 Spot Market Price

Have you ever wondered how to find the current market spot rate for an instance? When people first hear that spot instances can save you up 60%-90%, they tend to react in disbelief. This is natural and understandable, it just sounds too good to be true. Fortunately, there are many ways to confirm that the 60%-90% spot price savings is real. This article tries to lists the many ways in one place.

Spot Fleet Weighting and Pricing Explained

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 work more quickly. Hopefully, you find these notes helpful also.

What is the Difference Between Spot Fleet vs Spot Instances

One of the biggest game changers to spot instances are spot fleets. I mentioned how you could save 60%-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 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. The method obviously dramatically increases the chances of you getting instances available at your spot bid price. Like I said, game changer.

How Does AWS Spot Instance Pricing Work?

Spot instance pricing is a fascinating EC2 pricing model that many people have not heard of yet. It is not only interesting from the 60%-90% savings perspective, which is already huge. It is also interesting because it encourages you to think about building your system with the best practice of high availability in mind.

On-Demand vs Reserved vs Spot AWS EC2 Pricing Comparison

Just like renting or leasing a house, when you pay for servers from AWS, there are many, many different options. The plethora of options is so vast that it can be a little overwhelming staring at them. I’m hoping to cover the pricing options in a way that is useful. With the options, you get exactly the same server, but you pay a different price because of the different commitment level from either you or from AWS.

UFO How to Create Unlimited Extra Environments

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.

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