Scale Key Manager on Upstream Kubernetes

AIStor Key Manager installs on Kubernetes as a statefulset. As a result, you can quickly scale Key Manager up or down by modifying the desired number of replicas.

By default, Key Manager installs on Kubernetes with three (3) replicas.

Use the following procedure to adjust the number of replicas up or down to meet your requirements.

Use your preferred text editor to open the aistor-keymanager-operator-values.yaml file used when installing Key Manager.

For example, to open the file in nano from the current directory, use the following:
```
nano aistor-keymanager-operator-values.yaml
```
Update the value of keyManager.replicas.

After modification, the file should resemble the following:
```
global: license
   license: "LICENSE-STRING"

keyManager:
   Replicas: 4
```
Apply the updated values to the deployment.
```
helm upgrade keymanager-operator minio/aistor-keymanager-operator --reuse-values -n keymanager-operator -f aistor-keymanager-operator-values.yaml
```
If successful, the command outputs a summary of installed resources.

To validate the installation, run kubectl get all -n keymanager-operator and check the status of deployed resources.
Update any load balancers, reverse proxies, or other network control components to include the new host as part of the configuration.