I have an openstack configuration, with 3 controller nodes and multiple compute nodes , one of the controllers has an LVM storage based on HDD drives, while another one has an SDD one, and when I tried to configure the two different types of storage as cinder backends I faced a dilemma since according to the documentation I have to specify the two different backends in the cinder configuration as it is explained here https://docs.openstack.org/cinder/latest/admin/multi-backend.html however and since I want to separate disks type when creating volumes, I had to specify different backend names, but I don't know if this configuration should be written in both the storage nodes, or should I specify for each one of these storage nodes the configuration related to its own type of disks.
Now, I tried writing the same configuration for both nodes, but I found out that the volume service related to server1 concerning disks in server2 is down, and the volume service in server2 concerning disks in server1 is also down.
$ openstack volume service list+------------------+---------------------+------+---------+-------+----------------------------+| Binary | Host | Zone | Status | State | Updated At |+------------------+---------------------+------+---------+-------+----------------------------+| cinder-scheduler | controller-01 | nova | enabled | up | 2023-01-18T14:27:51.000000 || cinder-scheduler | controller-02 | nova | enabled | up | 2023-01-18T14:27:41.000000 || cinder-scheduler | controller-03 | nova | enabled | up | 2023-01-18T14:27:50.000000 || cinder-volume | controller-03@lvm-1 | nova | enabled | up | 2023-01-18T14:27:42.000000 || cinder-volume | controller-01@lvm-1 | nova | enabled | down | 2023-01-18T14:10:00.000000 || cinder-volume | controller-01@lvm-3 | nova | enabled | down | 2023-01-18T14:09:42.000000 || cinder-volume | controller-03@lvm-3 | nova | enabled | down | 2023-01-18T12:12:19.000000|+------------------+---------------------+------+---------+-------+----------------------------+
This is the configuration I have written on the configuration files for cinder_api _cinder_scheduler and cinder_volume for both servers.
enabled_backends= lvm-1,lvm-3 [lvm-1] volume_group = cinder-volumes volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver volume_backend_name = lvm-1 target_helper = lioadm target_protocol = iscsi report_discard_supported = true [lvm-3] volume_group=cinder-volumes-ssd volume_driver=cinder.volume.drivers.lvm.LVMVolumeDriver volume_backend_name=lvm-3 target_helper = lioadm target_protocol = iscsi report_discard_supported = true