OpenStack Epoxy : Use Cinder Storage (Multi-BackEnds) |
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. |
| [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 last line [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 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 follows into the [keystone_authtoken] section [keystone_authtoken] ..... ..... service_token_roles = service service_token_roles_required = true # add to last line [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 = RegionOneroot@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 openstack volume type create lvm +-------------+--------------------------------------+ | Field | Value | +-------------+--------------------------------------+ | description | None | | id | 12f75645-6eb6-4e82-952b-1ccfc8149dc5 | | is_public | True | | name | lvm | +-------------+--------------------------------------+root@dlp ~(keystone)# openstack volume type create nfs +-------------+--------------------------------------+ | Field | Value | +-------------+--------------------------------------+ | description | None | | id | 9b4da449-c306-4654-89ca-60a50beafed5 | | is_public | True | | name | nfs | +-------------+--------------------------------------+root@dlp ~(keystone)# openstack volume type list +--------------------------------------+-------------+-----------+ | ID | Name | Is Public | +--------------------------------------+-------------+-----------+ | 9b4da449-c306-4654-89ca-60a50beafed5 | nfs | True | | 12f75645-6eb6-4e82-952b-1ccfc8149dc5 | lvm | True | | f66013e5-42fd-4894-9abb-5d765afdc988 | __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 openstack volume create --type lvm --size 10 disk-lvm +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2025-09-01T00:44:55.249132 | | description | None | | encrypted | False | | id | 50eca703-9041-4990-9a22-17957b4f75e0 | | 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 | da64c3c335434563b66eb2e8af260392 | +---------------------+--------------------------------------+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 | 2025-09-01T00:45:16.373852 | | description | None | | encrypted | False | | id | 3c1eb0de-b2f6-4544-befd-8149ba89d819 | | 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 | da64c3c335434563b66eb2e8af260392 | +---------------------+--------------------------------------+debian@dlp ~(keystone)$ openstack volume list +----------------------------------+----------+-----------+------+-------------+ | ID | Name | Status | Size | Attached to | +----------------------------------+----------+-----------+------+-------------+ | 3c1eb0de-b2f6-4544-befd- | disk-nfs | available | 10 | | | 8149ba89d819 | | | | | | 50eca703-9041-4990-9a22- | disk-lvm | available | 10 | | | 17957b4f75e0 | | | | | +----------------------------------+----------+-----------+------+-------------+ |
| [7] | Attach volume to an instance. |
| debian@dlp ~(keystone)$ openstack server list +----------------+-----------+---------+-----------------+----------+----------+ | ID | Name | Status | Networks | Image | Flavor | +----------------+-----------+---------+-----------------+----------+----------+ | 2deabceb-e220- | Debian-13 | SHUTOFF | private=10.0.0. | Debian13 | m1.small | | 4e5c-b8dd- | | | 249, | | | | 320683d0bf0b | | | 192.168.100.39 | | | +----------------+-----------+---------+-----------------+----------+----------+ debian@dlp ~(keystone)$ openstack server add volume Debian-13 disk-lvm debian@dlp ~(keystone)$ openstack server add volume Debian-13 disk-nfs # the status of attached disk turns [in-use] like follows debian@dlp ~(keystone)$ openstack volume list +-------------------------+----------+--------+------+-------------------------+ | ID | Name | Status | Size | Attached to | +-------------------------+----------+--------+------+-------------------------+ | 3c1eb0de-b2f6-4544- | disk-nfs | in-use | 10 | Attached to Debian-13 | | befd-8149ba89d819 | | | | on /dev/vdc | | 50eca703-9041-4990- | disk-lvm | in-use | 10 | Attached to Debian-13 | | 9a22-17957b4f75e0 | | | | on /dev/vdb | +-------------------------+----------+--------+------+-------------------------+ # to detach the disk, do like follows debian@dlp ~(keystone)$ openstack server remove volume Debian-13 disk-lvm debian@dlp ~(keystone)$ openstack server remove volume Debian-13 disk-nfs |
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