OpenStack Ocata : Use Cinder Storage (NFS)2017/03/16 |
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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 | | Open vSwitch | | Libvirt | +----------------------+
| Memcached httpd | | L2,L3,Metadata Agent | | Nova Compute |
| Keystone Glance | | Cinder-Volume | | L2 Agent |
| Nova API | | | | |
| Neutron Server | | | | |
| 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/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 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:/var/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 follows in 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 | 2017-03-17T05:46:47.745398 | | description | None | | encrypted | False | | id | d0e8d18d-4fa1-4152-bd75-41aa42ac7ef2 | | 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 | 6ecb1a2e5f664d508afac2b985508a0d | +---------------------+--------------------------------------+root@dlp ~(keystone)# openstack volume list +------------------------------+--------------+-----------+------+-------------+ | ID | Display Name | Status | Size | Attached to | +------------------------------+--------------+-----------+------+-------------+ | d0e8d18d- | disk01 | available | 10 | | | 4fa1-4152-bd75-41aa42ac7ef2 | | | | | +------------------------------+--------------+-----------+------+-------------+ |
| [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 Name | +--------------------+-------------+---------+--------------------+------------+ | 9b506f0f-4c3b-458b | Ubuntu_1604 | SHUTOFF | int_net=192.168.10 | Ubuntu1604 | | -9213-17de1c4da03c | | | 0.6, 10.0.0.203 | | +--------------------+-------------+---------+--------------------+------------+
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 | Display Name | Status | Size | Attached to | +-----------------------+--------------+--------+------+-----------------------+ | d0e8d18d-4fa1-4152-bd | disk01 | in-use | 10 | Attached to | | 75-41aa42ac7ef2 | | | | Ubuntu_1604 on | | | | | | /dev/vdb | +-----------------------+--------------+--------+------+-----------------------+ # detach the disk root@dlp ~(keystone)# openstack server remove volume Ubuntu_1604 disk01 |
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