Chapter 4. Testing the configured back end

After you deploy the back ends to the overcloud, test that you can successfully create volumes on them.

Procedure

Run the following command as the stack user to load the environment variables defined in home/stack/overcloudrec:
```
$ source /home/stack/overcloudrc
```

For more information, see Accessing the overcloud in the Director Installation and Usage guide.

Create a volume type for each back end. Log in to the Controller node of the overcloud as the stack user and run the following command:
```
$ cinder type-create backend1
$ cinder type-create backend2
```
These commands create the volume types backend1 and backend2, one for each back end that is defined with the cinder::config::cinder_config class of the environment file that you created.
Map each volume type to the volume_backend_name of a back end that is enabled with the cinder_user_enabled_backends class of the environment file that you created The following commands map the volume type backend1 to netapp1 and backend2 to netapp2:
```
$ cinder type-key backend1 set volume_backend_name=netapp1
$ cinder type-key backend2 set volume_backend_name=netapp2
```
Run the following command to test that it is possible to create a back end on netapp1 by invoking the backend1 volume type:
```
$ cinder create --volume-type backend1 --display_name netappvolume_1 1
```
Create a similar volume on the netapp2 back end by invoking the backend2 volume type:
```
$ cinder create --volume-type backend2 --display_name netappvolume_2 1
```