OpenStack Queens : Use Cinder Storage (NFS)2018/06/18 |
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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 eth0|10.0.0.35
+-----------+-----------+ +-----------+-----------+ +-----------+-----------+ +----------+-----------+
| [ Control Node ] | | [ Storage Node ] | | [ Compute Node ] | | [ NFS Server ] |
| | | | | | | |
| MariaDB RabbitMQ | | | | Libvirt | +----------------------+
| Memcached httpd | | L2 Agent | | Nova Compute |
| Keystone Glance | | L3 Agent | | L2 Agent |
| Nova API | | Metadata Agent | | |
| Neutron Server | | Cinder-Volume | | |
| Metadata Agent | | | | |
| Cinder API | | | | |
+-----------------------+ +-----------------------+ +-----------------------+
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| [1] |
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. |
| [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 the own domain name Domain = srv.world
root@storage:~#
vi /etc/cinder/cinder.conf # add the value for enabled_backends enabled_backends = nfs
# add follows to the end [nfs] volume_driver = cinder.volume.drivers.nfs.NfsDriver nfs_shares_config = /etc/cinder/nfs_shares nfs_mount_point_base = $state_path/mnt
root@storage:~#
vi /etc/cinder/nfs_shares # create new : specify NFS shared directory nfs.srv.world:/var/lib/nfs-share chmod 640 /etc/cinder/nfs_shares root@storage:~# chgrp cinder /etc/cinder/nfs_shares root@storage:~# systemctl restart cinder-volume root@storage:~# chown -R cinder. /var/lib/cinder/mnt
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| [3] | Change Nova settings on Compute Node to mount NFS. |
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root@node01:~#
apt -y install nfs-common
root@node01:~#
vi /etc/idmapd.conf # line 6: uncomment and change to the own domain name Domain = srv.world
root@node01:~#
vi /etc/nova/nova.conf # add to the end [cinder] os_region_name = RegionOne systemctl restart nova-compute
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| [4] | Login as a common user you'd like to add volumes to own instances. For example, create a virtual disk [disk01] with 10GB. It's OK to work on any node. (This example is on Control Node) |
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# set environment variable first ubuntu@dlp ~(keystone)$ echo "export OS_VOLUME_API_VERSION=2" >> ~/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 | 2018-06-18T04:45:12.000000 | | description | None | | encrypted | False | | id | facf1411-a20f-4885-8535-e5758ab1a6d2 | | multiattach | False | | name | disk01 | | properties | | | replication_status | None | | size | 10 | | snapshot_id | None | | source_volid | None | | status | creating | | type | None | | updated_at | None | | user_id | 601473fae2c444a484860046ef2484e2 | +---------------------+--------------------------------------+ubuntu@dlp ~(keystone)$ openstack volume list +--------------------------------------+--------+-----------+------+-------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+-----------+------+-------------+ | facf1411-a20f-4885-8535-e5758ab1a6d2 | 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 | +------------+-------------+---------+-----------------------------------+------------+----------+ | 3aae02a... | Ubuntu_1804 | SHUTOFF | int_net=192.168.100.5, 10.0.0.205 | Ubuntu1804 | m1.small | +------------+-------------+---------+-----------------------------------+------------+----------+
ubuntu@dlp ~(keystone)$
openstack server add volume Ubuntu_1804 disk01
# the status of attached disk turns [in-use] like follows ubuntu@dlp ~(keystone)$ openstack volume list +--------------------------------------+--------+--------+------+--------------------------------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+--------+------+--------------------------------------+ | facf1411-a20f-4885-8535-e5758ab1a6d2 | disk01 | in-use | 10 | Attached to Ubuntu_1804 on /dev/vdb | +--------------------------------------+--------+--------+------+--------------------------------------+ # detach the disk ubuntu@dlp ~(keystone)$ openstack server remove volume Ubuntu_1804 disk01 |
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