Book Image

Docker on Amazon Web Services

By : Justin Menga
Book Image

Docker on Amazon Web Services

By: Justin Menga

Overview of this book

Over the last few years, Docker has been the gold standard for building and distributing container applications. Amazon Web Services (AWS) is a leader in public cloud computing, and was the first to offer a managed container platform in the form of the Elastic Container Service (ECS). Docker on Amazon Web Services starts with the basics of containers, Docker, and AWS, before teaching you how to install Docker on your local machine and establish access to your AWS account. You'll then dig deeper into the ECS, a native container management platform provided by AWS that simplifies management and operation of your Docker clusters and applications for no additional cost. Once you have got to grips with the basics, you'll solve key operational challenges, including secrets management and auto-scaling your infrastructure and applications. You'll explore alternative strategies for deploying and running your Docker applications on AWS, including Fargate and ECS Service Discovery, Elastic Beanstalk, Docker Swarm and Elastic Kubernetes Service (EKS). In addition to this, there will be a strong focus on adopting an Infrastructure as Code (IaC) approach using AWS CloudFormation. By the end of this book, you'll not only understand how to run Docker on AWS, but also be able to build real-world, secure, and scalable container platforms in the cloud.
Table of Contents (26 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Creating an X-Ray daemon Docker image


Before our application can publish X-Ray tracing information, you must deploy an X-Ray daemon that your application can send this information to. Our goal is to run the X-Ray daemon using AWS Fargate, but before we can do that, we need to create a Docker image that will run the daemon. AWS provides examples of how to build an X-Ray daemon image, and we will following a similar approach to what is documented by AWS by creating a file called Dockerfile.xray in the root of the todobackend-aws repository:

FROM amazonlinux
RUN yum install -y unzip
RUN curl -o daemon.zip https://s3.dualstack.us-east-2.amazonaws.com/aws-xray-assets.us-east-2/xray-daemon/aws-xray-daemon-linux-2.x.zip
RUN unzip daemon.zip && cp xray /usr/bin/xray

ENTRYPOINT ["/usr/bin/xray", "-b", "0.0.0.0:2000"]
EXPOSE 2000/udp

You can now build this image locally by using the docker build command, as demonstrated here:

> docker build -t xray -f Dockerfile.xray .
Sending build context...