CentOS 8
Sponsored Link

OpenStack Victoria : Use Cinder Storage (Multi-BackEnds)
2020/11/19
 
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     | |        L2 Agent       | |     Nova Compute      | |
|  Keystone   Glance    | |        L3 Agent       | |      Open vSwitch     | |
|  Nova API             | |     Metadata Agent    | |        L2 Agent       | |
|  Neutron Server       | |     Cinder-Volume     | |                       | |
|  Metadata Agent       | |                       | |                       | |
|  Cinder API           | |                       | |                       | |
+-----------------------+ +-----------------------+ +-----------------------+ |
                                                                              |
------------+-----------------------------------------------------------------+
            |
        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 LAN, 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 ~]#
dnf -y install nfs-utils
[root@storage ~]#
vi /etc/idmapd.conf
# line 5: uncomment and change to your domain name

Domain =
srv.world
[root@storage ~]#
vi /etc/cinder/cinder.conf
# add follows in the [DEFAULT] section

enabled_backends = lvm,nfs

# add follows 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 openstack-cinder-volume

[root@storage ~]#
chown -R 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 follows to the end

[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          | a7094c06-d181-4a9e-9501-600fada3f6ff |
| is_public   | True                                 |
| name        | lvm                                  |
+-------------+--------------------------------------+

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

+-------------+--------------------------------------+
| Field       | Value                                |
+-------------+--------------------------------------+
| description | None                                 |
| id          | 24d26b83-255c-40d1-821d-79788c8b90d1 |
| is_public   | True                                 |
| name        | nfs                                  |
+-------------+--------------------------------------+

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

+--------------------------------------+-------------+-----------+
| ID                                   | Name        | Is Public |
+--------------------------------------+-------------+-----------+
| 24d26b83-255c-40d1-821d-79788c8b90d1 | nfs         | True      |
| a7094c06-d181-4a9e-9501-600fada3f6ff | lvm         | True      |
| 4190a49b-9a0a-4531-848e-c74674ba23b9 | __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          | 2020-11-19T02:34:38.000000           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | d601648e-b68b-489a-be1f-f2176baf283b |
| 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             | bb4ae84eefc04357987ec43b8e93118c     |
+---------------------+--------------------------------------+

[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          | 2020-11-19T02:34:54.000000           |
| description         | None                                 |
| encrypted           | False                                |
| id                  | cb2117eb-e630-46e5-a6da-5feb3fe56c81 |
| 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             | bb4ae84eefc04357987ec43b8e93118c     |
+---------------------+--------------------------------------+

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

+--------------------------------------+----------+-----------+------+-------------+
| ID                                   | Name     | Status    | Size | Attached to |
+--------------------------------------+----------+-----------+------+-------------+
| cb2117eb-e630-46e5-a6da-5feb3fe56c81 | disk-nfs | available |   10 |             |
| d601648e-b68b-489a-be1f-f2176baf283b | disk-lvm | available |   10 |             |
+--------------------------------------+----------+-----------+------+-------------+
[7] Attache volume to an instance.
[cent@dlp ~(keystone)]$
openstack server list

+--------------------------------------+----------+---------+-------------------------------------+---------+----------+
| ID                                   | Name     | Status  | Networks                            | Image   | Flavor   |
+--------------------------------------+----------+---------+-------------------------------------+---------+----------+
| 852fbb21-1dd6-4268-9532-54876bbc4567 | CentOS-8 | SHUTOFF | private=192.168.100.225, 10.0.0.204 | CentOS8 | m1.small |
+--------------------------------------+----------+---------+-------------------------------------+---------+----------+

[cent@dlp ~(keystone)]$
openstack server add volume CentOS-8 disk-lvm

[cent@dlp ~(keystone)]$
openstack server add volume CentOS-8 disk-nfs
# the status of attached disk turns [in-use] like follows

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

+--------------------------------------+----------+--------+------+-----------------------------------+
| ID                                   | Name     | Status | Size | Attached to                       |
+--------------------------------------+----------+--------+------+-----------------------------------+
| cb2117eb-e630-46e5-a6da-5feb3fe56c81 | disk-nfs | in-use |   10 | Attached to CentOS-8 on /dev/vdc  |
| d601648e-b68b-489a-be1f-f2176baf283b | disk-lvm | in-use |   10 | Attached to CentOS-8 on /dev/vdb  |
+--------------------------------------+----------+--------+------+-----------------------------------+

# detach the disk

[cent@dlp ~(keystone)]$
openstack server remove volume CentOS-8 disk-lvm

[cent@dlp ~(keystone)]$
openstack server remove volume CentOS-8 disk-nfs

Matched Content