OpenStack Mitaka : Use Cinder Storage (NFS)2016/05/08 |
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| | +------------------+ |
[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. |
[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. |
[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 [DEFAULT] section volume_api_class = nova.volume.cinder.API 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) |
# set environment variable first [root@dlp ~(keystone)]# echo "export OS_VOLUME_API_VERSION=2" >> ~/keystonerc [root@dlp ~(keystone)]# source ~/keystonerc
cinder create --display_name disk01 10 +--------------------------------+--------------------------------------+ | Property | Value | +--------------------------------+--------------------------------------+ | attachments | [] | | availability_zone | nova | | bootable | false | | consistencygroup_id | None | | created_at | 2016-05-09T14:46:33.000000 | | description | None | | encrypted | False | | id | bfb88906-30d8-42b3-8c02-29583491e2d0 | | metadata | {} | | migration_status | None | | multiattach | False | | name | disk01 | | os-vol-host-attr:host | None | | os-vol-mig-status-attr:migstat | None | | os-vol-mig-status-attr:name_id | None | | os-vol-tenant-attr:tenant_id | 7a160aeddebd4e398fd22e6491f10baa | | replication_status | disabled | | size | 10 | | snapshot_id | None | | source_volid | None | | status | creating | | updated_at | None | | user_id | f9c0838d5fcf4a87ba2e0b1653faa6d0 | | volume_type | None | +--------------------------------+--------------------------------------+[root@dlp ~(keystone)]# cinder list +--------------------------------------+-----------+--------+------+-------------+----------+-------------+ | ID | Status | Name | Size | Volume Type | Bootable | Attached to | +--------------------------------------+-----------+--------+------+-------------+----------+-------------+ | bfb88906-30d8-42b3-8c02-29583491e2d0 | available | disk01 | 10 | - | false | | +--------------------------------------+-----------+--------+------+-------------+----------+-------------+ |
[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. |
[root@dlp ~(keystone)]# nova list +-----------+----------+---------+------------+-------------+-----------------------------------+ | ID | Name | Status | Task State | Power State | Networks | +-----------+----------+---------+------------+-------------+-----------------------------------+ | 4e232450- | CentOS_7 | SHUTOFF | - | Shutdown | int_net=192.168.100.3, 10.0.0.201 | +-----------+----------+---------+------------+-------------+-----------------------------------+[root@dlp ~(keystone)]# nova volume-attach CentOS_7 bfb88906-30d8-42b3-8c02-29583491e2d0 auto +----------+--------------------------------------+ | Property | Value | +----------+--------------------------------------+ | device | /dev/vdb | | id | bfb88906-30d8-42b3-8c02-29583491e2d0 | | serverId | 4e232450-4cae-47ba-a19a-1c59e3cbc91b | | volumeId | bfb88906-30d8-42b3-8c02-29583491e2d0 | +----------+--------------------------------------+ # the status of attached disk turns "in-use" like follows [root@dlp ~(keystone)]# cinder list +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ | ID | Status | Name | Size | Volume Type | Bootable | Attached to | +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ | bfb88906-30d8-42b3-8c02-29583491e2d0 | in-use | disk01 | 10 | - | false | 4e232450-4cae-47ba-a19a-1c59e3cbc91b | +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ |
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