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Postinstallation configuration overview

After installing OpenShift Container Platform, a cluster administrator can configure and customize the following components:

  • Machine

  • Bare metal

  • Cluster

  • Node

  • Network

  • Storage

  • Users

  • Alerts and notifications

Postinstallation configuration tasks

You can perform the postinstallation configuration tasks to configure your environment to meet your needs.

The following lists details these configurations:

  • Configure operating system features: The Machine Config Operator (MCO) manages MachineConfig objects. By using the MCO, you can configure nodes and custom resources.

  • Configure cluster features. You can modify the following features of an OpenShift Container Platform cluster:

    • Image registry

    • Networking configuration

    • Image build behavior

    • Identity provider

    • The etcd configuration

    • Machine set creation to handle the workloads

    • Cloud provider credential management

  • Configuring a private cluster: By default, the installation program provisions OpenShift Container Platform by using a publicly accessible DNS and endpoints. To make your cluster accessible only from within an internal network, configure the following components to make them private:

    • DNS

    • Ingress Controller

    • API server

  • Perform node operations: By default, OpenShift Container Platform uses Red Hat Enterprise Linux CoreOS (RHCOS) compute machines. You can perform the following node operations:

    • Add and remove compute machines.

    • Add and remove taints and tolerations.

    • Configure the maximum number of pods per node.

    • Enable Device Manager.

  • Configure users: Users can authenticate themselves to the API by using OAuth access tokens. You can configure OAuth to perform the following tasks:

    • Specify an identity provider.

    • Use role-based access control to define and grant permissions to users.

    • Install an Operator from the software catalog.

  • Configuring alert notifications: By default, firing alerts are displayed on the Alerting UI of the web console. You can also configure OpenShift Container Platform to send alert notifications to external systems.