OpenStack Epoxy : Use Cinder Storage (Multi-BackEnds)2025/04/24 |
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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 |
+----------------------+
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| [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. |
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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
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| [4] | Configure Compute Node. |
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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
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| [5] | Create volume types. It's OK to work on any node. (example below is on Control Node) |
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# 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 | 2af08022-336c-4993-bae9-f99a910e3a78 | | is_public | True | | name | lvm | +-------------+--------------------------------------+root@dlp ~(keystone)# openstack volume type create nfs +-------------+--------------------------------------+ | Field | Value | +-------------+--------------------------------------+ | description | None | | id | 8220203d-6eb2-4ac4-a16b-a3fff448fd57 | | is_public | True | | name | nfs | +-------------+--------------------------------------+root@dlp ~(keystone)# openstack volume type list +--------------------------------------+-------------+-----------+ | ID | Name | Is Public | +--------------------------------------+-------------+-----------+ | 8220203d-6eb2-4ac4-a16b-a3fff448fd57 | nfs | True | | 2af08022-336c-4993-bae9-f99a910e3a78 | lvm | True | | 15eac4e9-2e7f-4d56-81b3-30bf24bae45c | __DEFAULT__ | True | +--------------------------------------+-------------+-----------+ |
| [6] | Login as a common user you'd like to add volumes to own instances. |
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# set environment variable ubuntu@dlp ~(keystone)$ echo "export OS_VOLUME_API_VERSION=3" >> ~/keystonerc ubuntu@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 | 2025-04-23T13:36:22.659223 | | description | None | | encrypted | False | | id | a35b8081-835d-42f5-b267-5f1c6a02bf5a | | 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 | a30763bf79b944f59efcfd59d4899e5b | +---------------------+--------------------------------------+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 | 2025-04-23T13:36:48.292745 | | description | None | | encrypted | False | | id | 21e46e02-3774-46bf-8d4b-18e653aafafe | | 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 | a30763bf79b944f59efcfd59d4899e5b | +---------------------+--------------------------------------+ubuntu@dlp ~(keystone)$ openstack volume list +----------------------------------+----------+-----------+------+-------------+ | ID | Name | Status | Size | Attached to | +----------------------------------+----------+-----------+------+-------------+ | 21e46e02-3774-46bf-8d4b- | disk-nfs | available | 10 | | | 18e653aafafe | | | | | | a35b8081-835d-42f5-b267- | disk-lvm | available | 10 | | | 5f1c6a02bf5a | | | | | +----------------------------------+----------+-----------+------+-------------+ |
| [7] | Attach volume to an instance. |
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ubuntu@dlp ~(keystone)$ openstack server list +--------------+-------------+---------+--------------+------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------+-------------+---------+--------------+------------+----------+ | fc2ffdc7- | Ubuntu-2404 | SHUTOFF | private=10.0 | Ubuntu2404 | m1.small | | d1e2-4bbf- | | | .0.217, 192. | | | | 9abc- | | | 168.100.107 | | | | 7cbf5e1deb9e | | | | | | +--------------+-------------+---------+--------------+------------+----------+
ubuntu@dlp ~(keystone)$
openstack server add volume Ubuntu-2404 disk-lvm ubuntu@dlp ~(keystone)$ openstack server add volume Ubuntu-2404 disk-nfs
# the status of attached disk turns [in-use] like follows ubuntu@dlp ~(keystone)$ openstack volume list +-------------------------+----------+--------+------+-------------------------+ | ID | Name | Status | Size | Attached to | +-------------------------+----------+--------+------+-------------------------+ | 21e46e02-3774-46bf- | disk-nfs | in-use | 10 | Attached to Ubuntu-2404 | | 8d4b-18e653aafafe | | | | on /dev/vdc | | a35b8081-835d-42f5- | disk-lvm | in-use | 10 | Attached to Ubuntu-2404 | | b267-5f1c6a02bf5a | | | | on /dev/vdb | +-------------------------+----------+--------+------+-------------------------+ # to detach the disk, do like follows ubuntu@dlp ~(keystone)$ openstack server remove volume Ubuntu-2404 disk-lvm ubuntu@dlp ~(keystone)$ openstack server remove volume Ubuntu-2404 disk-nfs |
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