OpenStack Xena : Use Cinder Storage (NFS)2021/10/07 |
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It's possible to use Virtual Storages provided by Cinder if an Instance needs more disks.
Configure Virtual storage with NFS 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 | | Neutron Server | | Nova Compute |
| | Keystone Glance | | OVN-Northd | | Open vSwitch |
| | Nova API | | Cinder Volume | | OVN Metadata Agent |
| | Cinder API | | | | OVN-Controller |
| +-----------------------+ +-----------------------+ +-----------------------+
|
+--------------+----------------------------------------------------------------------
eth0|10.0.0.35
+----------+-----------+
| [ NFS Server ] |
| |
+----------------------+
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| [1] |
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. |
| [2] | Configure Storage Node. |
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root@storage:~#
apt -y install nfs-common
root@storage:~#
vi /etc/idmapd.conf # line 6 : uncomment and change to your domain name Domain = srv.world
root@storage:~#
vi /etc/cinder/cinder.conf # add the value to [enabled_backends] param enabled_backends = nfs
# add to the end [nfs] volume_driver = cinder.volume.drivers.nfs.NfsDriver nfs_shares_config = /etc/cinder/nfs_shares nfs_mount_point_base = $state_path/mnt
root@storage:~#
vi /etc/cinder/nfs_shares # create new : specify NFS shared directory # if set multiple share, write one per line nfs.srv.world:/var/lib/nfs-share chmod 640 /etc/cinder/nfs_shares root@storage:~# chgrp cinder /etc/cinder/nfs_shares root@storage:~# systemctl restart cinder-volume root@storage:~# chown -R cinder. /var/lib/cinder/mnt
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| [3] | Change Nova settings on Compute Node to mount NFS. |
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root@node01:~#
apt -y install nfs-common
root@node01:~#
vi /etc/idmapd.conf # line 6 : uncomment and change to your domain name Domain = srv.world
root@node01:~#
vi /etc/nova/nova.conf # add to the end [cinder] os_region_name = RegionOne systemctl restart nova-compute
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| [4] | Login as a common user you'd like to add volumes to own instances. For example, create a virtual disk [disk01] with 10GB. It's OK to work on any node. (example below is on Control Node) |
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# set environment variable ubuntu@dlp ~(keystone)$ echo "export OS_VOLUME_API_VERSION=3" >> ~/keystonerc ubuntu@dlp ~(keystone)$ source ~/keystonerc
openstack volume create --size 10 disk01 +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2021-10-07T07:47:14.760283 | | description | None | | encrypted | False | | id | 67a4612f-df64-4155-b2da-245055e40e2d | | multiattach | False | | name | disk01 | | properties | | | replication_status | None | | size | 10 | | snapshot_id | None | | source_volid | None | | status | creating | | type | __DEFAULT__ | | updated_at | None | | user_id | f5a7ffdd6e54434badbd75ba0e6d6ac2 | +---------------------+--------------------------------------+ubuntu@dlp ~(keystone)$ openstack volume list +--------------------------------------+--------+-----------+------+-------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+-----------+------+-------------+ | 67a4612f-df64-4155-b2da-245055e40e2d | disk01 | available | 10 | | +--------------------------------------+--------+-----------+------+-------------+ |
| [5] | Attach the virtual disk to an Instance. For the exmaple below, the disk is connected as [/dev/vdb]. It's possible to use it as a storage to create a file system on it. |
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ubuntu@dlp ~(keystone)$ openstack server list +--------------------------------------+-------------+---------+-------------------------------------+------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------------------------------+-------------+---------+-------------------------------------+------------+----------+ | 4699d575-1d94-4024-8323-9dfa3599c8d2 | Ubuntu-2004 | SHUTOFF | private=10.0.0.249, 192.168.100.237 | Ubuntu2004 | m1.small | +--------------------------------------+-------------+---------+-------------------------------------+------------+----------+
ubuntu@dlp ~(keystone)$
openstack server add volume Ubuntu-2004 disk01
# the status of attached disk turns [in-use] like follows ubuntu@dlp ~(keystone)$ openstack volume list +--------------------------------------+--------+--------+------+--------------------------------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+--------+------+--------------------------------------+ | 67a4612f-df64-4155-b2da-245055e40e2d | disk01 | in-use | 10 | Attached to Ubuntu-2004 on /dev/vdb | +--------------------------------------+--------+--------+------+--------------------------------------+ # detach the disk ubuntu@dlp ~(keystone)$ openstack server remove volume Ubuntu-2004 disk01 |
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