Report backend state in service list¶

Currently, Cinder couldn’t report backend state to service, operators only know that cinder-volume process is up, but isn’t aware of whether the backend storage device is ok. Users still can create volume and go to fail over and over again. To make maintenance easier, operator could query storage device state via service list and fix the problem more quickly. If device state is down, that means volume creation will fail.

To do so, use the Block Storage API: service list to get the backend state. Run this command:

$ openstack volume service list

Add backend_state: up/down into response body of service list. This feature is supported after microversion 3.49.