MicroShift is Developer Preview software only.
For more information about the support scope of Red Hat Developer Preview software, see Developer Preview Support Scope.Chapter 5. Using oc and kubectl commands
The Kubernetes command-line interface (CLI), kubectl
, can be used to run commands against a Kubernetes cluster. Because Red Hat build of MicroShift is a certified Kubernetes distribution, you can use the supported kubectl
binaries that ship with Red Hat build of MicroShift, or you can gain extended functionality by using the oc
binary.
5.1. The oc binary
The oc
binary offers the same capabilities as the kubectl
binary, but it extends to natively support additional Red Hat build of MicroShift features, including:
Route resource
The
Route
resource object is specific to Red Hat build of MicroShift distributions, and builds upon standard Kubernetes primitives.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.
If you installed an earlier version of the oc
binary, you cannot use it to complete all of the commands in Red Hat build of MicroShift 4.12. If you want the latest features, you must download and install the latest version of the oc
binary corresponding to your Red Hat build of MicroShift server version.
Non-security API changes will involve, at minimum, two minor releases (4.1 to 4.2 to 4.3, for example) to allow older oc
binaries to update. Using new capabilities might require newer oc
binaries. A 4.3 server might have additional capabilities that a 4.2 oc
binary cannot use and a 4.3 oc
binary might have additional capabilities that are unsupported by a 4.2 server.
X.Y ( |
X.Y+N footnote:versionpolicyn[Where N is a number greater than or equal to 1.] ( | |
X.Y (Server) |
|
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X.Y+N footnote:versionpolicyn[] (Server) |
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Fully compatible.
oc
client might not be able to access server features.
oc
client might provide options and features that might not be compatible with the accessed server.
5.2. The kubectl binary
The kubectl
binary is provided as a means to support existing workflows and scripts for new Red Hat build of MicroShift 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 Red Hat build of MicroShift cluster.
The kubectl
binary is included in the archive if you download the oc
binary.
For more information, see the kubectl documentation.