Ubuntu 22.04
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OpenStack Zed : Use Cinder Storage (Multi-BackEnds)
2022/10/07
 
It's possible to use Virtual Storages provided by Cinder if an Instance needs more disks.
Configure Virtual storage with LVM and NFS Multi-Backend on here.
------------+-----------------------------+-----------------------------+--------------+
            |                             |                             |              |
        eth0|10.0.0.30                eth0|10.0.0.50                eth0|10.0.0.51     |
+-----------+-----------+     +-----------+-----------+     +-----------+-----------+  |
|   [ dlp.srv.world ]   |     | [ network.srv.world ] |     |  [ node01.srv.world ] |  |
|     (Control Node)    |     |     (Network Node)    |     |     (Compute Node)    |  |
|                       |     |                       |     |                       |  |
|  MariaDB    RabbitMQ  |     |      Open vSwitch     |     |        Libvirt        |  |
|  Memcached  Nginx     |     |     Neutron Server    |     |      Nova Compute     |  |
|  Keystone   httpd     |     |      OVN-Northd       |     |      Open vSwitch     |  |
|  Glance     Nova API  |     |  Nginx  iSCSI Target  |     |   OVN Metadata Agent  |  |
|  Cinder API           |     |     Cinder Volume     |     |     OVN-Controller    |  |
+-----------------------+     +-----------------------+     +-----------------------+  |
                                                                                       |
-----------+---------------------------------------------------------------------------+
       eth0|10.0.0.35
+----------+-----------+
|   [ nfs.srv.world ]  |
|       NFS Server     |
+----------------------+

[1]
For LVM backend on this example, use a volume group [vg_volume01] for it.
[2]
NFS server is required to be running on your local network, refer to here.
On this example, configure [/var/lib/nfs-share] directory on [nfs.srv.world] as a shared directory.
[3] Configure Storage Node.
root@network:~#
apt -y install nfs-common
root@network:~#
vi /etc/idmapd.conf
# line 5 : uncomment and change to your domain name

Domain =
srv.world
root@network:~#
vi /etc/cinder/cinder.conf
# add the value to [enabled_backends] param

enabled_backends = lvm,nfs

# add to the end
[lvm]
target_helper = lioadm
target_protocol = iscsi
target_ip_address = $my_ip
volume_backend_name = LVM
# volume group name created
volume_group = vg_volume01
volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver
volumes_dir = $state_path/volumes

[nfs]
volume_driver = cinder.volume.drivers.nfs.NfsDriver
volume_backend_name = NFS
nfs_shares_config = /etc/cinder/nfs_shares
nfs_mount_point_base = $state_path/mnt_nfs 

root@storage:~#
vi /etc/cinder/nfs_shares
# create new : specify NFS shared directory
# if set multiple share, write one per line

nfs.srv.world:/var/lib/nfs-share
root@network:~#
chmod 640 /etc/cinder/nfs_shares

root@network:~#
chgrp cinder /etc/cinder/nfs_shares

root@network:~#
systemctl restart cinder-volume

root@network:~#
chown -R cinder. /var/lib/cinder/mnt_nfs
[4] Configure Compute Node.
root@node01:~#
apt -y install nfs-common
root@node01:~#
vi /etc/idmapd.conf
# line 5 : uncomment and change to your domain name

Domain =
srv.world
root@node01:~#
vi /etc/nova/nova.conf
# add to the end

[cinder]
os_region_name = RegionOne
root@node01:~#
systemctl restart nova-compute

[5] Create volume types. It's OK to work on any node. (example below is on Control Node)
# set environment variable

root@dlp ~(keystone)#
echo "export OS_VOLUME_API_VERSION=3" >> ~/keystonerc

root@dlp ~(keystone)#
source ~/keystonerc
root@dlp ~(keystone)#
openstack volume type create lvm

+-------------+--------------------------------------+
| Field       | Value                                |
+-------------+--------------------------------------+
| description | None                                 |
| id          | 19aabc25-c5c2-4af9-b7c1-4b483c4fb786 |
| is_public   | True                                 |
| name        | lvm                                  |
+-------------+--------------------------------------+

root@dlp ~(keystone)#
openstack volume type create nfs

+-------------+--------------------------------------+
| Field       | Value                                |
+-------------+--------------------------------------+
| description | None                                 |
| id          | 03f886fe-6c69-452d-9cb9-6f18bd60c4fe |
| is_public   | True                                 |
| name        | nfs                                  |
+-------------+--------------------------------------+

root@dlp ~(keystone)#
openstack volume type list

+--------------------------------------+-------------+-----------+
| ID                                   | Name        | Is Public |
+--------------------------------------+-------------+-----------+
| 03f886fe-6c69-452d-9cb9-6f18bd60c4fe | nfs         | True      |
| 19aabc25-c5c2-4af9-b7c1-4b483c4fb786 | lvm         | True      |
| 14cf70ec-0fb5-4fec-9cfd-9d719bedc097 | __DEFAULT__ | True      |
+--------------------------------------+-------------+-----------+
[6] Login as a common user you'd like to add volumes to own instances.
# set environment variable

ubuntu@dlp ~(keystone)$
echo "export OS_VOLUME_API_VERSION=3" >> ~/keystonerc

ubuntu@dlp ~(keystone)$
source ~/keystonerc
ubuntu@dlp ~(keystone)$
openstack volume create --type lvm --size 10 disk-lvm

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| attachments         | []                                   |
| availability_zone   | nova                                 |
| bootable            | false                                |
| consistencygroup_id | None                                 |
| created_at          | 2022-10-07T08:28:22.397742           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | 02d5c205-4ad1-488b-8c00-eb5d91e69a87 |
| multiattach         | False                                |
| name                | disk-lvm                             |
| properties          |                                      |
| replication_status  | None                                 |
| size                | 10                                   |
| snapshot_id         | None                                 |
| source_volid        | None                                 |
| status              | creating                             |
| type                | lvm                                  |
| updated_at          | None                                 |
| user_id             | 9345b7f4de21427abf31ad308cf952f8     |
+---------------------+--------------------------------------+

ubuntu@dlp ~(keystone)$
openstack volume create --type nfs --size 10 disk-nfs

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| attachments         | []                                   |
| availability_zone   | nova                                 |
| bootable            | false                                |
| consistencygroup_id | None                                 |
| created_at          | 2022-10-07T08:28:41.938948           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | a1bc982a-ed13-4d77-83c2-fa71e3d41df0 |
| multiattach         | False                                |
| name                | disk-nfs                             |
| properties          |                                      |
| replication_status  | None                                 |
| size                | 10                                   |
| snapshot_id         | None                                 |
| source_volid        | None                                 |
| status              | creating                             |
| type                | nfs                                  |
| updated_at          | None                                 |
| user_id             | 9345b7f4de21427abf31ad308cf952f8     |
+---------------------+--------------------------------------+

ubuntu@dlp ~(keystone)$
openstack volume list

+--------------------------------------+----------+-----------+------+-------------+
| ID                                   | Name     | Status    | Size | Attached to |
+--------------------------------------+----------+-----------+------+-------------+
| a1bc982a-ed13-4d77-83c2-fa71e3d41df0 | disk-nfs | available |   10 |             |
| 02d5c205-4ad1-488b-8c00-eb5d91e69a87 | disk-lvm | available |   10 |             |
+--------------------------------------+----------+-----------+------+-------------+
[7] Attach volume to an instance.
ubuntu@dlp ~(keystone)$
openstack server list

+--------------------------------------+-------------+---------+-------------------------------------+------------+----------+
| ID                                   | Name        | Status  | Networks                            | Image      | Flavor   |
+--------------------------------------+-------------+---------+-------------------------------------+------------+----------+
| a456ee32-b105-4c5e-8eae-ddccb48f913e | Ubuntu-2204 | SHUTOFF | private=10.0.0.228, 192.168.100.187 | Ubuntu2204 | m1.small |
+--------------------------------------+-------------+---------+-------------------------------------+------------+----------+

ubuntu@dlp ~(keystone)$
openstack server add volume Ubuntu-2204 disk-lvm

ubuntu@dlp ~(keystone)$
openstack server add volume Ubuntu-2204 disk-nfs
# the status of attached disk turns [in-use] like follows

ubuntu@dlp ~(keystone)$
openstack volume list

+--------------------------------------+----------+--------+------+--------------------------------------+
| ID                                   | Name     | Status | Size | Attached to                          |
+--------------------------------------+----------+--------+------+--------------------------------------+
| a1bc982a-ed13-4d77-83c2-fa71e3d41df0 | disk-nfs | in-use |   10 | Attached to Ubuntu-2204 on /dev/vdc  |
| 02d5c205-4ad1-488b-8c00-eb5d91e69a87 | disk-lvm | in-use |   10 | Attached to Ubuntu-2204 on /dev/vdb  |
+--------------------------------------+----------+--------+------+--------------------------------------+

# detach the disk

ubuntu@dlp ~(keystone)$
openstack server remove volume Ubuntu-2204 disk-lvm

ubuntu@dlp ~(keystone)$
openstack server remove volume Ubuntu-2204 disk-nfs

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