// Module included in the following assemblies:
//
// * /serverless/install/install-serverless-operator.adoc

:_mod-docs-content-type: PROCEDURE
[id="serverless-install-cli_{context}"]
= Installing the {ServerlessOperatorName} from the CLI

You can install the {ServerlessOperatorName} from the OperatorHub by using the CLI. Installing this Operator enables you to install and use Knative components.

.Prerequisites

ifdef::openshift-enterprise[]
* You have access to an {product-title} account with cluster administrator access.
* Your cluster has the Marketplace capability enabled or the Red Hat Operator catalog source configured manually.
endif::[]

ifdef::openshift-dedicated,openshift-rosa[]
* You have access to an {product-title} account with cluster or dedicated administrator access.
endif::[]

* You have logged in to the {product-title} cluster.

.Procedure
. Create a YAML file containing `Namespace`, `OperatorGroup`, and `Subscription` objects to subscribe a namespace to the {ServerlessOperatorName}. For example, create the file `serverless-subscription.yaml` with the following content:
+
.Example subscription
[source,yaml]
----
---
apiVersion: v1
kind: Namespace
metadata:
  name: openshift-serverless
---
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: serverless-operators
  namespace: openshift-serverless
spec: {}
---
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: serverless-operator
  namespace: openshift-serverless
spec:
  channel: stable <1>
  name: serverless-operator <2>
  source: redhat-operators <3>
  sourceNamespace: openshift-marketplace <4>
----
<1> The channel name of the Operator. The `stable` channel enables installation of the most recent stable version of the {ServerlessOperatorName}.
<2> The name of the Operator to subscribe to. For the {ServerlessOperatorName}, this is always `serverless-operator`.
<3> The name of the CatalogSource that provides the Operator. Use `redhat-operators` for the default OperatorHub catalog sources.
<4> The namespace of the CatalogSource. Use `openshift-marketplace` for the default OperatorHub catalog sources.

. Create the `Subscription` object:
+
----
$ oc apply -f serverless-subscription.yaml
----

.Verification
Check that the cluster service version (CSV) has reached the `Succeeded` phase:

.Example command
[source,yaml]
----
$ oc get csv
----

.Example output
[source,yaml]
----
NAME                          DISPLAY                        VERSION   REPLACES                      PHASE
serverless-operator.v1.25.0   Red Hat OpenShift Serverless   1.25.0    serverless-operator.v1.24.0   Succeeded
----