Usage of oc and kubectl commands

The Kubernetes command-line interface (CLI), kubectl, can be used to run commands against a Kubernetes cluster. Because OKD is a certified Kubernetes distribution, you can use the supported kubectl binaries that ship with OKD, or you can gain extended functionality by using the oc binary.

The oc binary

The oc binary offers the same capabilities as the kubectl binary, but it extends to natively support additional OKD features, including:

• Full support for OKD resources

  Resources such as DeploymentConfig, BuildConfig, Route, ImageStream, and ImageStreamTag objects are specific to OKD 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 OKD 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

The kubectl binary is provided as a means to support existing workflows and scripts for new OKD 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 OKD cluster.

You can install the supported kubectl binary by following the steps to Install the OpenShift 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.