# Prerrequisites

- Openshift API connectivity

The plugin must be able to reach the API remotely in order to extract the information.

- Obtaining Bearer token

It can be obtained with the following CLI command, after logging in with this one:

```
./oc whoami -t
```

- **The openshift user account must have cluster-reader permissions.**

The cli commands to add permissions are as follows (these must be given from a privileged account)

Add a role to a user :

```
oc adm policy add-role-to-user <role> <user_name>
```

Remove a role from a user :

```
oc adm policy remove-role-from-user <role> <user_name>
```

Add a role to a user for all projects:

```
oc adm policy add-cluster-role-to-user <role> <user_name>
```

Remove a user role for all projects:

```
oc adm policy remove-cluster-role-from-user <role> <user_name>
```

Example :

[![image-1644427009267.png](https://pandorafms.com/guides/public/uploads/images/gallery/2022-02/scaled-1680-/image-1644427009267.png)](https://pandorafms.com/guides/public/uploads/images/gallery/2022-02/image-1644427009267.png)

- **The cluster-monitoring option must be activated.**

This can be done with the following command :

```
./crc config set enable-cluster-monitoring true
```

Example:

[![openshiftmonitoing.png](https://pandorafms.com/guides/public/uploads/images/gallery/2022-02/scaled-1680-/openshiftmonitoing.png)](https://pandorafms.com/guides/public/uploads/images/gallery/2022-02/openshiftmonitoing.png)

To be able to have enabled a minimum of 14 gb is requested, so if we have configured the environment with less, and we activate the cluster-monitoring option we will have to add more to the machine, the minimum is 14336 in mb.

- **This file can be applied directly to configure the necessary permissions.**

```
oc apply -f https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.4.1/components.yaml
```

- You need to run this apiservice: v1beta1.metrics.k8s.io and the metrics server.

```
oc get apiservice
```

- **Tiene que estar activada la opción cluster-monitoring**

The command to specify the memory is :

```
./crc config set memory 14336
```

Example:

[![change memory.png](https://pandorafms.com/guides/public/uploads/images/gallery/2022-02/scaled-1680-/change-memory.png)](https://pandorafms.com/guides/public/uploads/images/gallery/2022-02/change-memory.png)