Comment 6 for bug 1492748

It seems that there is an action for the charm which does exactly what Jorge described in #4
`juju run-action cinder/leader remove-services`

` removed: cinder@cinder-ceph-hdd,cinder@cinder-ceph-hdd,cinder@cinder-ceph-flash,cinder@cinder-ceph-flash,cinder@cinder-ceph-flash,cinder@cinder-ceph-hdd
`

From
```
+------------------+--------------------------+------+---------+-------+----------------------------+---------+-----------------+---------------+
| Binary | Host | Zone | Status | State | Updated_at | Cluster | Disabled Reason | Backend State |
+------------------+--------------------------+------+---------+-------+----------------------------+---------+-----------------+---------------+
| cinder-scheduler | cinder | nova | enabled | up | 2021-08-04T16:00:00.000000 | - | - | |
| cinder-volume | cinder@cinder-ceph-flash | nova | enabled | down | 2021-08-04T14:12:03.000000 | - | - | up |
| cinder-volume | cinder@cinder-ceph-flash | nova | enabled | down | 2021-08-04T14:12:08.000000 | - | - | up |
| cinder-volume | cinder@cinder-ceph-flash | nova | enabled | up | 2021-08-04T15:59:57.000000 | - | - | up |
| cinder-volume | cinder@cinder-ceph-hdd | nova | enabled | down | 2021-08-04T14:11:58.000000 | - | - | up |
| cinder-volume | cinder@cinder-ceph-hdd | nova | enabled | down | 2021-08-04T14:12:04.000000 | - | - | up |
| cinder-volume | cinder@cinder-ceph-hdd | nova | enabled | up | 2021-08-04T15:59:57.000000 | - | - | up |
+------------------+--------------------------+------+---------+-------+----------------------------+---------+-----------------+---------------+
```

to

```
Binary Host Zone Status State Updated At RPC Version Object Version Cluster
cinder-scheduler cinder nova enabled :-) 2021-08-04 16:54:27 3.12 1.38
cinder-volume cinder@cinder-ceph-hdd nova enabled :-) 2021-08-04 16:54:26 3.16 1.38
cinder-volume cinder@cinder-ceph-hdd nova enabled :-) 2021-08-04 16:54:26 3.16 1.38
cinder-volume cinder@cinder-ceph-hdd nova enabled :-) 2021-08-04 16:54:27 3.16 1.38
cinder-volume cinder@cinder-ceph-flash nova enabled :-) 2021-08-04 16:54:26 3.16 1.38
cinder-volume cinder@cinder-ceph-flash nova enabled :-) 2021-08-04 16:54:26 3.16 1.38
cinder-volume cinder@cinder-ceph-flash nova enabled :-) 2021-08-04 16:54:27 3.16 1.38
```