// Module included in the following assemblies:
//
// deploying/assembly_deploy-cluster-operator.adoc

[id='deploying-cluster-operator-to-watch-multiple-namespaces-{context}']
= Deploying the Cluster Operator to watch multiple namespaces

This procedure shows how to deploy the Cluster Operator to watch Strimzi resources across multiple namespaces in your Kubernetes cluster.

.Prerequisites

* This procedure requires use of a Kubernetes user account which is able to create `CustomResourceDefinitions`, `ClusterRoles` and `ClusterRoleBindings`.
Use of Role Base Access Control (RBAC) in the Kubernetes cluster usually means that permission to create, edit, and delete these resources is limited to Kubernetes cluster administrators, such as `system:admin`.

.Procedure

. Edit the Strimzi installation files to use the namespace the Cluster Operator is going to be installed into.
+
For example, in this procedure the Cluster Operator is installed into the namespace `_my-cluster-operator-namespace_`.
+
include::snip-cluster-operator-namespace-sed.adoc[]

. Edit the `install/cluster-operator/060-Deployment-strimzi-cluster-operator.yaml` file
to add a list of all the namespaces the Cluster Operator will watch to the `STRIMZI_NAMESPACE` environment variable.
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For example, in this  procedure the Cluster Operator will watch the namespaces `watched-namespace-1`, `watched-namespace-2`, `watched-namespace-3`.
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[source,yaml,subs="attributes"]
----
apiVersion: apps/v1
kind: Deployment
spec:
  # ...
  template:
    spec:
      serviceAccountName: strimzi-cluster-operator
      containers:
      - name: strimzi-cluster-operator
        image: {DockerClusterOperator}
        imagePullPolicy: IfNotPresent
        env:
        - name: STRIMZI_NAMESPACE
          value: watched-namespace-1,watched-namespace-2,watched-namespace-3
----

. For each namespace listed, install the `RoleBindings`.
+
In this example, we replace `_watched-namespace_` in these commands with the namespaces listed in the previous step,
repeating them for `watched-namespace-1`, `watched-namespace-2`, `watched-namespace-3`:
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[source,shell,subs="+quotes,attributes+"]
kubectl create -f install/cluster-operator/020-RoleBinding-strimzi-cluster-operator.yaml -n _watched-namespace_
kubectl create -f install/cluster-operator/031-RoleBinding-strimzi-cluster-operator-entity-operator-delegation.yaml -n _watched-namespace_
kubectl create -f install/cluster-operator/032-RoleBinding-strimzi-cluster-operator-topic-operator-delegation.yaml -n _watched-namespace_

. Deploy the Cluster Operator:
+
[source,shell,subs="+quotes,attributes+"]
kubectl create -f install/cluster-operator -n _my-cluster-operator-namespace_

. Verify that the Cluster Operator was successfully deployed:
+
[source,shell,subs="attributes+"]
----
kubectl get deployments
----
