OpenStack Newton : Cinder Storage (NFS)2016/10/26 |
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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.
+------------------+
10.0.0.50| [ Storage Node ] |
+------------------+ +-----+ Cinder-Volume |
| [ Control Node ] | | eth0| | +--------------+
| Keystone |10.0.0.30 | +------------------+ 10.0.0.40| |
| Glance |------------+------------------------------------+ NFS Server |
| Nova API |eth0 | +------------------+ eth0| |
| Cinder API | | eth0| [ Compute Node ] | +--------------+
+------------------+ +-----+ Nova Compute |
10.0.0.51| |
+------------------+
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| [1] |
NFS server is required to be running on your LAN, refer to here.
On this example, configure "/storage" directory on "nfs.srv.world" as a shared directory. |
| [2] | Configure Storage Node. |
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[root@storage ~]#
yum -y install nfs-utils
[root@storage ~]#
vi /etc/idmapd.conf # line 5: uncomment and change to the own domain name Domain = srv.world
[root@storage ~]#
vi /etc/cinder/cinder.conf # add follows in the [DEFAULT] section 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:/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 |
| [3] | Change Nova settings to mount NFS. |
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[root@node01 ~]#
yum -y install nfs-utils
[root@node01 ~]#
vi /etc/idmapd.conf # line 5: uncomment and change to the own domain name Domain = srv.world
[root@node01 ~]#
vi /etc/nova/nova.conf # add follows in the end [cinder] os_region_name = RegionOne systemctl restart openstack-nova-compute |
| [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 | 2016-10-27T02:21:08.061864 | | description | None | | encrypted | False | | id | ab1bfb76-0e0b-4e09-90f2-5f4becee31bd | | migration_status | None | | multiattach | False | | name | disk01 | | properties | | | replication_status | disabled | | size | 10 | | snapshot_id | None | | source_volid | None | | status | creating | | type | None | | updated_at | None | | user_id | 0a28ee66b05f4c7b9709f316c5109e0a | +---------------------+--------------------------------------+[root@dlp ~(keystone)]# openstack volume list +--------------------------------------+--------------+-----------+------+-------------+ | ID | Display Name | Status | Size | Attached to | +--------------------------------------+--------------+-----------+------+-------------+ | ab1bfb76-0e0b-4e09-90f2-5f4becee31bd | disk01 | available | 10 | | +--------------------------------------+--------------+-----------+------+-------------+ |
| [5] | Attach the virtual disk to an Instance. For the example 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 Name | +-----------+----------+---------+------------------------------------+------------+ | e5a31503- | CentOS_7 | SHUTOFF | int_net=192.168.100.11, 10.0.0.200 | CentOS7 | +-----------+----------+---------+------------------------------------+------------+
[root@dlp ~(keystone)]#
openstack server add volume CentOS_7 disk01
# the status of attached disk turns "in-use" like follows [root@dlp ~(keystone)]# openstack volume list +--------------------------------------+--------------+--------+------+-----------------------------------+ | ID | Display Name | Status | Size | Attached to | +--------------------------------------+--------------+--------+------+-----------------------------------+ | ab1bfb76-0e0b-4e09-90f2-5f4becee31bd | disk01 | in-use | 10 | Attached to CentOS_7 on /dev/vdb | +--------------------------------------+--------------+--------+------+-----------------------------------+ |
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