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OpenStack Zed : Use Cinder Storage (Multi-BackEnds)2023/06/29

 
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  |  |  Neutron L2/L3 Agent  |  |        Libvirt        |
|  Memcached  Nginx     |  |   Neutron Metadata    |  |      Nova Compute     |
|  Keystone   httpd     |  |     Open vSwitch      |  |    Neutron L2 Agent   |
|  Glance     Nova API  |  |     iSCSI Target      |  |      Open vSwitch     |
|  Neutron Server       |  |     Cinder Volume     |  |                       |
|  Neutron Metadata     |  |                       |  |                       |
|  Cinder API           |  |                       |  |                       |
+-----------------------+  +-----------------------+  +-----------------------+

-----------+-------------------------------------------------------------------
       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: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 lines under [keystone_authtoken] section
[keystone_authtoken]
.....
.....
service_token_roles = service
service_token_roles_required = true

# add to the end
[service_user]
send_service_user_token = true
auth_url = https://dlp.srv.world:5000
auth_type = password
project_domain_name = default
user_domain_name = default
project_name = service
username = nova
password = servicepassword
insecure = false

[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          | 8c82261c-8847-4dd5-932b-0afd2c9cccbb |
| is_public   | True                                 |
| name        | lvm                                  |
+-------------+--------------------------------------+

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

+-------------+--------------------------------------+
| Field       | Value                                |
+-------------+--------------------------------------+
| description | None                                 |
| id          | 2d4217c5-e4a3-4ed9-854e-64edc88ba3b9 |
| is_public   | True                                 |
| name        | nfs                                  |
+-------------+--------------------------------------+

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

+--------------------------------------+-------------+-----------+
| ID                                   | Name        | Is Public |
+--------------------------------------+-------------+-----------+
| 2d4217c5-e4a3-4ed9-854e-64edc88ba3b9 | nfs         | True      |
| 8c82261c-8847-4dd5-932b-0afd2c9cccbb | lvm         | True      |
| add8758b-74e4-4f07-b737-e72e9017f517 | __DEFAULT__ | True      |
+--------------------------------------+-------------+-----------+
[6] Login as a common user you'd like to add volumes to own instances.
# set environment variable

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

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

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| attachments         | []                                   |
| availability_zone   | nova                                 |
| bootable            | false                                |
| consistencygroup_id | None                                 |
| created_at          | 2023-06-29T04:37:45.084084           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | 6db031d6-efd6-4fbc-b856-9271e5865c5a |
| 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             | de51d5f0ee2c485885877d21f5b424e0     |
+---------------------+--------------------------------------+

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

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| attachments         | []                                   |
| availability_zone   | nova                                 |
| bootable            | false                                |
| consistencygroup_id | None                                 |
| created_at          | 2023-06-29T04:38:04.160405           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | fb460b1c-468e-41c8-aa6a-e2df07f401ca |
| 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             | de51d5f0ee2c485885877d21f5b424e0     |
+---------------------+--------------------------------------+

debian@dlp ~(keystone)$
openstack volume list

+--------------------------------------+----------+-----------+------+-------------+
| ID                                   | Name     | Status    | Size | Attached to |
+--------------------------------------+----------+-----------+------+-------------+
| fb460b1c-468e-41c8-aa6a-e2df07f401ca | disk-nfs | available |   10 |             |
| 6db031d6-efd6-4fbc-b856-9271e5865c5a | disk-lvm | available |   10 |             |
+--------------------------------------+----------+-----------+------+-------------+
[7] Attach volume to an instance.
debian@dlp ~(keystone)$
openstack server list

+--------------------------------------+-----------+---------+------------------------------------+----------+-----------+
| ID                                   | Name      | Status  | Networks                           | Image    | Flavor    |
+--------------------------------------+-----------+---------+------------------------------------+----------+-----------+
| c3a4a792-a7ac-41bd-8c93-7fd162016f22 | Debian-12 | SHUTOFF | private=10.0.0.241, 192.168.100.66 | Debian12 | m1.medium |
+--------------------------------------+-----------+---------+------------------------------------+----------+-----------+

debian@dlp ~(keystone)$
openstack server add volume Debian-12 disk-lvm

debian@dlp ~(keystone)$
openstack server add volume Debian-12 disk-nfs
# the status of attached disk turns [in-use] like follows

debian@dlp ~(keystone)$
openstack volume list

+--------------------------------------+----------+--------+------+------------------------------------+
| ID                                   | Name     | Status | Size | Attached to                        |
+--------------------------------------+----------+--------+------+------------------------------------+
| fb460b1c-468e-41c8-aa6a-e2df07f401ca | disk-nfs | in-use |   10 | Attached to Debian-12 on /dev/vdc  |
| 6db031d6-efd6-4fbc-b856-9271e5865c5a | disk-lvm | in-use |   10 | Attached to Debian-12 on /dev/vdb  |
+--------------------------------------+----------+--------+------+------------------------------------+

# detach the disk

debian@dlp ~(keystone)$
openstack server remove volume Debian-12 disk-lvm

debian@dlp ~(keystone)$
openstack server remove volume Debian-12 disk-nfs

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