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OpenStack Dalmatian : Use Cinder Storage (Multi-BackEnds)2024/10/11

 

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 ~]#
dnf -y install nfs-utils
[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 follows in the [DEFAULT] section

enabled_backends = lvm,nfs

# add follows 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@network ~]#
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 openstack-cinder-volume

[root@network ~]#
chown -R cinder:cinder /var/lib/cinder/mnt_nfs

[4] Configure Compute Node.
[root@node01 ~]#
dnf -y install nfs-utils
[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 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 = RegionOne

[root@node01 ~]#
systemctl restart openstack-nova-compute
# if SELinux is enabled, change policy like follows

[root@node01 ~]#
vi iscsiadm.te
# create new

module iscsiadm 1.0;

require {
        type iscsid_t;
        class capability dac_override;
}

#============= iscsid_t ==============
allow iscsid_t self:capability dac_override;

[root@node01 ~]#
checkmodule -m -M -o iscsiadm.mod iscsiadm.te

[root@node01 ~]#
semodule_package --outfile iscsiadm.pp --module iscsiadm.mod

[root@node01 ~]#
semodule -i iscsiadm.pp

[5] Create volume types. It's OK to work on any node. (This example 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          | 066573d6-a56c-420c-8215-4c49c84ebea1 |
| is_public   | True                                 |
| name        | lvm                                  |
+-------------+--------------------------------------+

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

+-------------+--------------------------------------+
| Field       | Value                                |
+-------------+--------------------------------------+
| description | None                                 |
| id          | 181e3015-7db8-4886-95e6-0cc8d0341c6b |
| is_public   | True                                 |
| name        | nfs                                  |
+-------------+--------------------------------------+

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

+--------------------------------------+-------------+-----------+
| ID                                   | Name        | Is Public |
+--------------------------------------+-------------+-----------+
| 181e3015-7db8-4886-95e6-0cc8d0341c6b | nfs         | True      |
| 066573d6-a56c-420c-8215-4c49c84ebea1 | lvm         | True      |
| 1bae2cfb-d3b9-4bcc-8262-7f6350a52d00 | __DEFAULT__ | True      |
+--------------------------------------+-------------+-----------+
[6] Login as a common user you'd like to add volumes to own instances.
[cent@dlp ~(keystone)]$
openstack volume create --type lvm --size 10 disk-lvm

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| attachments         | []                                   |
| availability_zone   | nova                                 |
| bootable            | false                                |
| consistencygroup_id | None                                 |
| created_at          | 2024-10-11T00:18:47.381844           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | 056e824d-2e0f-4860-bdcd-7055051fc481 |
| 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             | 19c7530debb54eb0bfe6dc47aae3df32     |
+---------------------+--------------------------------------+

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

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| attachments         | []                                   |
| availability_zone   | nova                                 |
| bootable            | false                                |
| consistencygroup_id | None                                 |
| created_at          | 2024-10-11T00:19:07.585683           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | a001f6fc-67f5-4081-979b-90e09a28b4d4 |
| 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             | 19c7530debb54eb0bfe6dc47aae3df32     |
+---------------------+--------------------------------------+

[cent@dlp ~(keystone)]$
openstack volume list

+--------------------------------------+----------+-----------+------+-------------+
| ID                                   | Name     | Status    | Size | Attached to |
+--------------------------------------+----------+-----------+------+-------------+
| a001f6fc-67f5-4081-979b-90e09a28b4d4 | disk-nfs | available |   10 |             |
| 056e824d-2e0f-4860-bdcd-7055051fc481 | disk-lvm | available |   10 |             |
+--------------------------------------+----------+-----------+------+-------------+
[7] Attache volume to an instance.
[cent@dlp ~(keystone)]$
openstack server list

+--------------------------------------+------------+---------+-------------------------------------+----------------+----------+
| ID                                   | Name       | Status  | Networks                            | Image          | Flavor   |
+--------------------------------------+------------+---------+-------------------------------------+----------------+----------+
| 3d753408-6705-4cbf-acd8-2e09d975b973 | CentOS-St9 | SHUTOFF | private=10.0.0.206, 192.168.100.103 | CentOS-Stream9 | m1.small |
+--------------------------------------+------------+---------+-------------------------------------+----------------+----------+

[cent@dlp ~(keystone)]$
openstack server add volume CentOS-St9 disk-lvm

[cent@dlp ~(keystone)]$
openstack server add volume CentOS-St9 disk-nfs
# the status of attached disk turns [in-use] like follows

[cent@dlp ~(keystone)]$
openstack volume list

+--------------------------------------+----------+--------+------+-------------------------------------+
| ID                                   | Name     | Status | Size | Attached to                         |
+--------------------------------------+----------+--------+------+-------------------------------------+
| a001f6fc-67f5-4081-979b-90e09a28b4d4 | disk-nfs | in-use |   10 | Attached to CentOS-St9 on /dev/vdc  |
| 056e824d-2e0f-4860-bdcd-7055051fc481 | disk-lvm | in-use |   10 | Attached to CentOS-St9 on /dev/vdb  |
+--------------------------------------+----------+--------+------+-------------------------------------+

# detach the disk

[cent@dlp ~(keystone)]$
openstack server remove volume CentOS-St9 disk-lvm

[cent@dlp ~(keystone)]$
openstack server remove volume CentOS-St9 disk-nfs

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