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OpenStack Juno : Use Virtual Storages(NFS)
2015/01/11 |
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It's possible to use the Virtual Storage 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.
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 ~]#
for service in rpcbind nfs-lock nfs-idmap nfs-mountd; do
systemctl restart $service systemctl enable $service done
[root@storage ~]#
vi /etc/cinder/cinder.conf # add follows in the [DEFAULT] section
volume_driver=cinder.volume.drivers.nfs.NfsDriver
nfs_shares_config=/etc/cinder/nfs_shares nfs_mount_point_base=/var/lib/cinder/mnt
[root@storage ~]#
vi /etc/cinder/nfs_shares # create new: specify NFS shared directories nfs.srv.world:/storage chmod 640 /etc/cinder/nfs_shares [root@storage ~]# chgrp cinder /etc/cinder/nfs_shares [root@storage ~]# mkdir /var/lib/cinder/mnt [root@storage ~]# chown cinder. /var/lib/cinder/mnt [root@storage ~]# systemctl restart openstack-cinder-volume |
| [3] | Change Nova settings to mount with 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 ~]#
for service in rpcbind nfs-lock nfs-idmap nfs-mountd; do
systemctl restart $service systemctl enable $service done
[root@node01 ~]#
vi /etc/nova/nova.conf # add follows in the [DEFAULT] section volume_drivers="nfs=nova.virt.libvirt.volume.LibvirtNFSVolumeDriver" 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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[root@dlp ~(keystone)]# cinder create --display_name disk01 10
+---------------------+--------------------------------------+
| Property | Value |
+---------------------+--------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| created_at | 2015-01-11T14:35:07.860579 |
| display_description | None |
| display_name | disk01 |
| encrypted | False |
| id | ad3c6f06-e5c1-4185-b640-687b2b6369f0 |
| metadata | {} |
| size | 10 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| volume_type | None |
+---------------------+--------------------------------------+
[root@dlp ~(keystone)]# cinder list +--------------------------------------+-----------+--------------+------+-------------+----------+-------------+ | ID | Status | Display Name | Size | Volume Type | Bootable | Attached to | +--------------------------------------+-----------+--------------+------+-------------+----------+-------------+ | ad3c6f06-e5c1-4185-b640-687b2b6369f0 | available | disk01 | 10 | None | false | | +--------------------------------------+-----------+--------------+------+-------------+----------+-------------+ |
| [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)]# nova list +-----------+-----------+---------+------------+-------------+-----------------------------------+ | ID | Name | Status | Task State | Power State | Networks | +-----------+-----------+---------+------------+-------------+-----------------------------------+ | e2785612- | CentOS_70 | SHUTOFF | - | Shutdown | int_net=192.168.100.6, 10.0.0.201 | +-----------+-----------+---------+------------+-------------+-----------------------------------+[root@dlp ~(keystone)]# nova volume-attach CentOS_70 ad3c6f06-e5c1-4185-b640-687b2b6369f0 auto +----------+--------------------------------------+ | Property | Value | +----------+--------------------------------------+ | device | /dev/vdb | | id | ad3c6f06-e5c1-4185-b640-687b2b6369f0 | | serverId | e2785612-28be-4460-9e77-93c8f78b296d | | volumeId | ad3c6f06-e5c1-4185-b640-687b2b6369f0 | +----------+--------------------------------------+ # the status of attached disk turns "in-use" like follows [root@dlp ~(keystone)]# cinder list +--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+ | ID | Status | Display Name | Size | Volume Type | Bootable | Attached to | +--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+ | ad3c6f06-e5c1-4185-b640-687b2b6369f0 | in-use | disk01 | 10 | None | false | e2785612-28be-4460-9e77-93c8f78b296d | +--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+ |