Welcome to the official OpenShift Container Platform 4.3 documentation, where you can find information to help you learn about OpenShift Container Platform and start exploring its features.

To navigate the OpenShift Container Platform 4.3 documentation, you can either

  • Use the left navigation bar to browse the documentation or

  • Select the activity that interests you from the contents of this Welcome page

Cluster installer activities

As someone setting out to install an OpenShift Container Platform 4.3 cluster, this documentation will help you:

  • Install a cluster in a restricted network: If your cluster that uses user-provisioned infrastructure on AWS, GCP, vSphere, or bare metal does not have full access to the internet, you can mirror the OpenShift Container Platform installation images and install a cluster in a restricted network.

  • Install a cluster in an existing network: If you use an existing Virtual Private Cloud (VPC) in AWS or GCP or an existing VNet on Azure, you can install a cluster.

  • Install a private cluster: If your cluster does not require external internet access, you can install a private cluster on AWS, Azure, or GCP. Internet access is still required to access the cloud APIs and installation media.

  • Check installation logs: Access installation logs to evaluate issues that occur during OpenShift Container Platform 4.3 installation.

  • Access OpenShift Container Platform: Use credentials output at the end of the installation process to log in to the OpenShift Container Platform cluster from the command line or web console.

  • Install Red Hat OpenShift Container Storage: Install Red Hat OpenShift Container Storage on existing worker nodes to provide agnostic persistent storage for OpenShift Container Platform.

Developer activities

Ultimately, OpenShift Container Platform is a platform for developing and deploying containerized applications. As an application developer, OpenShift Container Platform documentation will help you:

  • Understand OpenShift Container Platform development: Learn the different types of containerized applications, from simple containers to advanced Kubernetes deployments and Operators.

  • Work with projects: Create projects from the web console or CLI to organize and share the software you develop.

  • Work with applications: Use the Developer perspective in the OpenShift Container Platform web console to easily create and deploy applications. Use the Topology view to visually interact with your applications, monitor status, connect and group components, and modify your code base.

  • Use the developer CLI tool (odo): The odo CLI tool lets developers create single or multi-component applications easily and automates deployment, build, and service route configurations. It abstracts complex Kubernetes and OpenShift Container Platform concepts, allowing developers to focus on developing their applications.

  • Deploy Helm Charts: Helm 3 is a package manager that helps developers define, install, and update application packages on Kubernetes. A Helm Chart is a packaging format that describes an application that can be deployed using the Helm CLI.

  • Understand Operators: Operators are the preferred method for creating on-cluster applications for OpenShift Container Platform 4.3. Learn about the Operator Framework and how to deploy applications using installed Operators into your projects.

  • Understand image builds: Choose from different build strategies (Docker, S2I, custom, and pipeline) that can include different kinds of source materials (from places like Git repositories, local binary inputs, and external artifacts). Then, follow examples of build types from basic builds to advanced builds.

  • Create container images: A container image is the most basic building block in OpenShift Container Platform (and Kubernetes) applications. Defining imagestreams lets you gather multiple versions of an image in one place as you continue its development. S2I containers let you insert your source code into a base container that is set up to run code of a particular type (such as Ruby, Node.js, or Python).

  • Create Deployments and DeploymentConfigs: Use Deployments and DeploymentConfigs to exert fine-grained management over applications. Use the Workloads page or oc CLI to manage DeploymentConfigs. Learn Rolling, Recreate, and Custom deployment strategies.

  • Create templates: Use existing templates or create your own templates that describe how an application is built or deployed. A template can combine images with descriptions, parameters, replicas, exposed ports and other content that defines how an application can be run or built.

  • Create Operators: Operators are the preferred method for creating on-cluster applications for OpenShift Container Platform 4.3. Learn the workflow for building, testing, and deploying Operators. Then create your own Operators based on Ansible or Helm, or configure built-in Prometheus monitoring using the Operator SDK.

  • REST API Guide: Lists OpenShift Container Platform application programming interface endpoints.

  • Use Template Service Broker or OpenShift Ansible Broker applications: Service brokers are a mechanism for provisioning applications outside of an OpenShift Container Platform environment.

Cluster administrator activities

Ongoing tasks on your OpenShift Container Platform 4.3 cluster include various activities for managing machines, providing services to users, and following monitoring and logging features that watch over the cluster. As a cluster administrator, this documentation will help you:

Manage cluster components

Change cluster components

Monitor the cluster