// Module included in the following assemblies:
//
// * observability/logging/cluster-logging-deploying.adoc

:_mod-docs-content-type: PROCEDURE
[id="cluster-logging-deploy-cli_{context}"]
= Installing the {clo} by using the CLI

You can use the {oc-first} to install the {clo}.

.Prerequisites

ifdef::openshift-origin[]
* Ensure that you have downloaded the {cluster-manager-url-pull} as shown in _Obtaining the installation program_ in the installation documentation for your platform.
+
If you have the pull secret, add the `redhat-operators` catalog to the OperatorHub custom resource (CR) as shown in *Configuring {product-title} to use Red Hat Operators*.
endif::[]

* You have administrator permissions.
* You have installed the {oc-first}.

.Procedure

. Create a `Namespace` object as a YAML file:
+
.Example `Namespace` object
[source,yaml]
----
apiVersion: v1
kind: Namespace
metadata:
  name: <name> <1>
  annotations:
    openshift.io/node-selector: ""
  labels:
    openshift.io/cluster-monitoring: "true"
----
<1> You must specify `openshift-logging` as the name of the namespace for logging versions 5.7 and earlier versions. For logging 5.8 and later versions, you can use any name.

. Apply the `Namespace` object by running the following command:
+
[source,terminal]
----
$ oc apply -f <filename>.yaml
----

. Create an `OperatorGroup` object as a YAML file:
+
.Example `OperatorGroup` object
[source,yaml]
----
apiVersion: operators.coreos.com/v1
kind: OperatorGroup
metadata:
  name: cluster-logging
  namespace: openshift-logging <1>
spec:
  targetNamespaces: [ ] <2>
----
<1> Ensure that the `namespace` field is set to `openshift-logging`.
<2> For logging versions 5.7 and earlier, set `targetNamespaces` to `openshift-logging`. For logging versions 5.8 and later, the default installation mode is all namespaces on the cluster, or specify a list of namespaces separated by a comma.

. Apply the `OperatorGroup` object by running the following command:
+
[source,terminal]
----
$ oc apply -f <filename>.yaml
----

. Create a `Subscription` object to subscribe the namespace to the {clo}:
+
.Example `Subscription` object
[source,yaml]
----
apiVersion: operators.coreos.com/v1alpha1
kind: Subscription
metadata:
  name: cluster-logging
  namespace: openshift-logging <1>
spec:
  channel: stable <2>
  name: cluster-logging
  source: redhat-operators <3>
  sourceNamespace: openshift-marketplace
----
<1> You must specify the `openshift-logging` namespace for logging versions 5.7 and older. For logging 5.8 and later versions, you can use any namespace.
<2> Specify `stable` or `stable-x.y` as the channel.
<3> Specify `redhat-operators`. If your {product-title} cluster is installed on a restricted network, also known as a disconnected cluster, specify the name of the `CatalogSource` object you created when you configured the Operator Lifecycle Manager (OLM).

. Apply the subscription by running the following command:
+
[source,terminal]
----
$ oc apply -f <filename>.yaml
----
+
The {clo} is installed to the `openshift-logging` namespace.

.Verification

. Run the following command:
+
[source,terminal]
----
$ oc get csv -n <namespace>
----

. Observe the output and confirm that the {clo} exists in the namespace:
+
.Example output
[source,terminal]
----
NAMESPACE                                               NAME                                         DISPLAY                  VERSION               REPLACES   PHASE
...
openshift-logging                                       clusterlogging.5.8.0-202007012112.p0         OpenShift Logging          5.8.0-202007012112.p0              Succeeded
...
----