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OpenStack Mitaka : Use Cinder Storage (NFS)
2016/06/02 |
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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:~#
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 into 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 cinder-volume root@storage:~# chown -R cinder. /var/lib/cinder/mnt
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| [3] | Change Nova settings 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 into the [DEFAULT] section volume_api_class = nova.volume.cinder.API 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
cinder create --display_name disk01 10
+--------------------------------+--------------------------------------+
| Property | Value |
+--------------------------------+--------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| consistencygroup_id | None |
| created_at | 2016-06-05T12:32:03.000000 |
| description | None |
| encrypted | False |
| id | 907445c7-5423-4688-bae6-a3a489365005 |
| 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 | 61bb62a97e394b8db8f95aa05a678771 |
| replication_status | disabled |
| size | 10 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| updated_at | None |
| user_id | 45bb5ebf547f4be2a21bf4a07c83ad85 |
| volume_type | None |
+--------------------------------+--------------------------------------+
root@dlp ~(keystone)# cinder list +--------------------------------------+-----------+--------+------+-------------+----------+-------------+ | ID | Status | Name | Size | Volume Type | Bootable | Attached to | +--------------------------------------+-----------+--------+------+-------------+----------+-------------+ | 907445c7-5423-4688-bae6-a3a489365005 | available | disk01 | 10 | - | 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 | +-----------+-------------+---------+------------+-------------+-----------------------------------+ | 545457b2- | Ubuntu_1604 | SHUTOFF | - | Shutdown | int_net=192.168.100.3, 10.0.0.201 | +-----------+-------------+---------+------------+-------------+-----------------------------------+root@dlp ~(keystone)# nova volume-attach Ubuntu_1604 907445c7-5423-4688-bae6-a3a489365005 auto +----------+--------------------------------------+ | Property | Value | +----------+--------------------------------------+ | device | /dev/vdb | | id | 907445c7-5423-4688-bae6-a3a489365005 | | serverId | 545457b2-517f-4a3b-bae2-bb99beb8342a | | volumeId | 907445c7-5423-4688-bae6-a3a489365005 | +----------+--------------------------------------+ # the status of attached disk turns "in-use" like follows root@dlp ~(keystone)# cinder list +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ | ID | Status | Name | Size | Volume Type | Bootable | Attached to | +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ | 907445c7-5423-4688-bae6-a3a489365005 | in-use | disk01 | 10 | - | false | 545457b2-517f-4a3b-bae2-bb99beb8342a | +--------------------------------------+--------+--------+------+-------------+----------+--------------------------------------+ |