OpenStack Pike : Use Cinder Storage (NFS)2017/09/17 |
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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.
------------+---------------------------+---------------------------+-------------------------+------------
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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-get -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-get -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] | 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 root@dlp ~(keystone)# echo "export OS_VOLUME_API_VERSION=2" >> ~/keystonerc root@dlp ~(keystone)# source ~/keystonerc
openstack volume create --size 10 disk01 +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2017-09-20T07:15:52.683634 | | description | None | | encrypted | False | | id | aeb65261-4183-4d5d-a4f3-118d4fe65049 | | migration_status | None | | 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 | 71b407652ab4433a801915ab21018ffd | +---------------------+--------------------------------------+root@dlp ~(keystone)# openstack volume list +--------------------------------------+--------+-----------+------+-------------+ | ID | Name | Status | Size | Attached to | +--------------------------------------+--------+-----------+------+-------------+ | aeb65261-4183-4d5d-a4f3-118d4fe65049 | 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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root@dlp ~(keystone)# openstack server list +-----------+-------------+---------+------------------------------------+------------+----------+ | ID | Name | Status | Networks | Image | Flavor | +-----------+-------------+---------+------------------------------------+------------+----------+ | f5ae3046- | Ubuntu_1604 | SHUTOFF | int_net=192.168.100.10, 10.0.0.210 | Ubuntu1604 | m1.small | +-----------+-------------+---------+------------------------------------+------------+----------+
root@dlp ~(keystone)#
openstack server add volume Ubuntu_1604 disk01
# the status of attached disk turns [in-use] like follows root@dlp ~(keystone)# openstack volume list +-----------+--------+--------+------+--------------------------------------+ | ID | Name | Status | Size | Attached to | +-----------+--------+--------+------+--------------------------------------+ | aeb65261- | disk01 | in-use | 10 | Attached to Ubuntu_1604 on /dev/vdb | +-----------+--------+--------+------+--------------------------------------+ # for detaching the disk, run like follows root@dlp ~(keystone)# openstack server remove volume Ubuntu_1604 disk01 |
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