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Chapter 6. Usage of oc and kubectl commands
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.
6.1. 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 DeploymentConfigs, BuildConfigs, Routes, ImageStreams, and ImageStreamTags are specific to OpenShift Container Platform distributions, and build upon standard Kubernetes primitives.
Authentication
The
ocbinary offers a built-inlogincommand 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 commandoc new-projectmakes it easier to start a project that you can switch to as your default.
6.2. The kubectl binary
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.
For more information, see the kubectl docs.
