Ubuntu 20.04
Sponsored Link

OpenStack Yoga : Use Cinder Storage (Multi-BackEnds)
2022/04/06
 
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
|  +-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|  |    [ Control Node ]   |   |    [ Storage Node ]   |   |    [ Compute Node ]   |
|  |                       |   |                       |   |                       |
|  |  MariaDB    RabbitMQ  |   |      Open vSwitch     |   |        Libvirt        |
|  |  Memcached  httpd     |   |     Neutron Server    |   |     Nova Compute      |
|  |  Keystone   Glance    |   |       OVN-Northd      |   |      Open vSwitch     |
|  |  Nova API             |   |     Cinder Volume     |   |   OVN Metadata Agent  |
|  |  Cinder API           |   |     iSCSI Target      |   |     OVN-Controller    |
|  +-----------------------+   +-----------------------+   +-----------------------+
|
+--------------+----------------------------------------------------------------------
           eth0|10.0.0.35
    +----------+-----------+
    |   [  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@storage:~#
apt -y install nfs-common
root@storage:~#
vi /etc/idmapd.conf
# line 6 : uncomment and change to your domain name

Domain =
srv.world
root@storage:~#
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
# IP address of Storage Node
target_ip_address = 10.0.0.50
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@storage:~#
chmod 640 /etc/cinder/nfs_shares

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

root@storage:~#
systemctl restart cinder-volume

root@storage:~#
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 6 : 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          | d30ecd1f-8467-4210-a32c-ba32bc0e0090 |
| is_public   | True                                 |
| name        | lvm                                  |
+-------------+--------------------------------------+

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

+-------------+--------------------------------------+
| Field       | Value                                |
+-------------+--------------------------------------+
| description | None                                 |
| id          | 943b84bc-f015-4ee5-9e4d-3e97a5a0b7cd |
| is_public   | True                                 |
| name        | nfs                                  |
+-------------+--------------------------------------+

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

+--------------------------------------+-------------+-----------+
| ID                                   | Name        | Is Public |
+--------------------------------------+-------------+-----------+
| 943b84bc-f015-4ee5-9e4d-3e97a5a0b7cd | nfs         | True      |
| d30ecd1f-8467-4210-a32c-ba32bc0e0090 | lvm         | True      |
| 4f7b2062-9ccf-40d2-9978-9dd4a705996f | __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          | 2022-04-06T03:44:12.378731           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | 178a99c3-721c-4737-8960-5a8024a8f3fa |
| 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             | 95f196a1851c4b93b016871f7d5ded82     |
+---------------------+--------------------------------------+

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          | 2022-04-06T03:44:58.299521           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | 1da987f5-cc84-402c-87af-bb8ea04e09f5 |
| 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             | 95f196a1851c4b93b016871f7d5ded82     |
+---------------------+--------------------------------------+

ubuntu@dlp ~(keystone)$
openstack volume list

+--------------------------------------+----------+-----------+------+-------------+
| ID                                   | Name     | Status    | Size | Attached to |
+--------------------------------------+----------+-----------+------+-------------+
| 1da987f5-cc84-402c-87af-bb8ea04e09f5 | disk-nfs | available |   10 |             |
| 178a99c3-721c-4737-8960-5a8024a8f3fa | disk-lvm | available |   10 |             |
+--------------------------------------+----------+-----------+------+-------------+
[7] Attach volume to an instance.
ubuntu@dlp ~(keystone)$
openstack server list

+--------------------------------------+-------------+---------+------------------------------------+------------+----------+
| ID                                   | Name        | Status  | Networks                           | Image      | Flavor   |
+--------------------------------------+-------------+---------+------------------------------------+------------+----------+
| 7ea894ee-3a91-4541-96ba-717ff45917c5 | Ubuntu-2004 | SHUTOFF | private=10.0.0.230, 192.168.100.12 | Ubuntu2004 | m1.small |
+--------------------------------------+-------------+---------+------------------------------------+------------+----------+

ubuntu@dlp ~(keystone)$
openstack server add volume Ubuntu-2004 disk-lvm

ubuntu@dlp ~(keystone)$
openstack server add volume Ubuntu-2004 disk-nfs
# the status of attached disk turns [in-use] like follows

ubuntu@dlp ~(keystone)$
openstack volume list

+--------------------------------------+----------+--------+------+--------------------------------------+
| ID                                   | Name     | Status | Size | Attached to                          |
+--------------------------------------+----------+--------+------+--------------------------------------+
| 1da987f5-cc84-402c-87af-bb8ea04e09f5 | disk-nfs | in-use |   10 | Attached to Ubuntu-2004 on /dev/vdc  |
| 178a99c3-721c-4737-8960-5a8024a8f3fa | disk-lvm | in-use |   10 | Attached to Ubuntu-2004 on /dev/vdb  |
+--------------------------------------+----------+--------+------+--------------------------------------+

# detach the disk

ubuntu@dlp ~(keystone)$
openstack server remove volume Ubuntu-2004 disk-lvm

ubuntu@dlp ~(keystone)$
openstack server remove volume Ubuntu-2004 disk-nfs

Matched Content