Disable Copied CSVs to reduce etcd usage

When an Operator is installed by the Operator Lifecycle Manager (OLM), a stripped-down copy of its ClusterServiceVersion (CSV) is created in every namespace the Operator watches. In clusters with many namespaces and cluster-wide Operators, Copied CSVs increase etcd storage usage, OLM memory consumption, and network bandwidth. Disabling Copied CSVs reduces the data stored in etcd and the memory footprint of OLM.

Prerequisites

An active kubectl session with administrative permissions to the destination Kubernetes cluster. See Overview of kubectl.

Procedure

Configure the OLMConfig object to disable Copied CSVs:
```
apiVersion: operators.coreos.com/v1
kind: OLMConfig
metadata:
  name: cluster
spec:
  features:
    disableCopiedCSVs: true
```
Disabling Copied CSVs reduces etcd storage usage and the memory footprint of OLM.

Verification

Verify that Copied CSVs are no longer created in user namespaces:
```
$ kubectl get csv -n <user-namespace>
```
The command should return no Copied CSVs for namespaces that do not have their own Operator subscriptions.

Additional resources