OpenShift is another container platform developed and supported by Red Hat. It’s built on top of Red Hat Enterprise Linux and Kubernetes, two of the world’s largest and fastest-growing opensource projects, and adds several services to offer a well-rounded platform experience out of the box. These include cluster services such as monitoring, managing, and updating the cluster; cluster services such as built-in CI/CD pipelines and logging; application services such as databases, language runtimes, and many others through what’s known in Kubernetes as Operators; and developer services such as a rich console, CLI, and tools for code editors, IDEs and more.
Red Hat OpenShift Service on AWS (ROSA) is a fully managed service provided by Red Hat and jointly supported by AWS. ROSA offers pay-as-you-go billing options (hourly and annual) on a single invoice through AWS and provides the option to contact either Red Hat or AWS for support. With ROSA, users can enjoy the benefits of a fully managed Red Hat OpenShift environment without having to worry about infrastructure management. It provides a simple and easy way to deploy, manage, and scale containerized applications using Kubernetes and Red Hat OpenShift.
ROSA provides the full functionality of Red Hat OpenShift, including built-in support for Kubernetes, as well as additional features such as automated scaling, self-healing, and automatic updates. It also provides integration with other AWS services such as Amazon Elastic Block Store (EBS) for storage and Amazon VPC for networking. ROSA is fully compatible with other Red Hat OpenShift services, such as OpenShift Container Platform and OpenShift Dedicated, and allows you to use the same tools and APIs for deploying and managing your applications. Additionally, it provides a full set of monitoring and logging tools to help you troubleshoot and debug issues with your applications.
ROSA is built on top of AWS, meaning that it benefits from the security, compliance, and global infrastructure of AWS; this allows you to take advantage of the security features and compliance certifications of AWS and also the scalability and reliability of the AWS infrastructure. ROSA can run Docker containers as it is built on top of Kubernetes, which is a container orchestration system that supports Docker. In ROSA, you can use the standard Kubernetes tooling, such as kubectl and oc (the OpenShift CLI) to deploy and manage your Docker containers as part of a Kubernetes cluster. This means that you can use standard Docker images and container registries to deploy your applications, and use the Kubernetes API to manage and scale your containers.
ROSA provides a set of custom resources and controllers for deploying and managing Red Hat OpenShift and Kubernetes clusters on AWS, but it does not provide any additional functionality for running and managing Docker containers. Instead, it utilizes Kubernetes as the underlying container orchestration system to run and manage Docker containers as part of a Kubernetes cluster. The following diagram shows a ROSA cluster in AWS.
The preceding diagram shows the simplified architecture of a private, multi-AZ ROSA cluster deployed in an AWS account, which is the most common configuration. ROSA clusters can also be deployed in single-AZ mode and with a public subnet to expose application ingress and the API endpoint directly to the internet.
ROSA is a fully managed service that allows you to deploy and manage containerized applications using Red Hat OpenShift and Kubernetes on the AWS cloud; it provides the full functionality of Red Hat OpenShift and benefits from the security, compliance, and global infrastructure of AWS.