Kubernetes' command line interface (CLI), kubectl
, can be used to run commands against a Kubernetes cluster. Because OpenShift Container Platform is a certified Kubernetes distribution, you can use the supported kubectl
binaries that ship with OpenShift Container Platform, or you can gain extended functionality by using the oc
binary.
The oc
binary offers the same capabilities as the kubectl
binary, but it extends to natively support additional OpenShift Container Platform features, including:
Full support for OpenShift Container Platform resources
Resources such as DeploymentConfig
, BuildConfig
, Route
, ImageStream
, and ImageStreamTag
objects are specific to OpenShift Container Platform distributions, and build upon standard Kubernetes primitives.
Authentication
The oc
binary offers a built-in login
command that allows authentication and enables you to work with OpenShift Container Platform projects, which map Kubernetes namespaces to authenticated users. See Understanding authentication for more information.
Additional commands
The additional command oc new-app
, for example, makes it easier to get new applications started using existing source code or pre-built images. Similarly, the additional command oc new-project
makes it easier to start a project that you can switch to as your default.
The kubectl
binary is provided as a means to support existing workflows and scripts for new OpenShift Container Platform users coming from a standard Kubernetes environment, or for those who prefer to use the kubectl
CLI. Existing users of kubectl
can continue to use the binary to interact with Kubernetes primitives, with no changes required to the OpenShift Container Platform cluster.
You can install the supported kubectl
binary by following the steps to Install the CLI. The kubectl
binary is included in the archive if you download the binary, or is installed when you install the CLI by using an RPM.
For more information, see the kubectl documentation.