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OpenStack Liberty : Use Cinder Storage(NFS)
2015/11/16 |
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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.
+------------------+
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 |
| [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 [DEFAULT] section osapi_volume_listen=0.0.0.0 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) |
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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 | 2015-11-17T13:01:30.000000 |
| description | None |
| encrypted | False |
| id | cc6b9d27-bf7d-41a5-989d-5fb95f9d9229 |
| 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 | d625e02b3d394afbad250def2f88fefa |
| os-volume-replication:driver_data | None |
| os-volume-replication:extended_status | None |
| replication_status | disabled |
| size | 10 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| user_id | b4c316b93a464f8ea46b01bd01a52003 |
| volume_type | None |
+---------------------------------------+--------------------------------------+
[root@dlp ~(keystone)]# cinder list +-----------+-----------+------------------+--------+------+-------------+----------+-------------+-------------+ | ID | Status | Migration Status | Name | Size | Volume Type | Bootable | Multiattach | Attached to | +-----------+-----------+------------------+--------+------+-------------+----------+-------------+-------------+ | 79906852- | available | - | disk01 | 10 | - | false | 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 | +-----------+----------+---------+------------+-------------+-----------------------+ | 74a217fa- | CentOS_7 | SHUTOFF | - | Shutdown | sharednet1=10.0.0.202 | +-----------+----------+---------+------------+-------------+-----------------------+[root@dlp ~(keystone)]# nova volume-attach CentOS_7 79906852-05ab-4e01-8b07-0706203fe4d9 auto +----------+--------------------------------------+ | Property | Value | +----------+--------------------------------------+ | device | /dev/vdb | | id | 79906852-05ab-4e01-8b07-0706203fe4d9 | | serverId | 74a217fa-4e64-4b40-90c7-8df929a2e53c | | volumeId | 79906852-05ab-4e01-8b07-0706203fe4d9 | +----------+--------------------------------------+ # the status of attached disk turns "in-use" like follows [root@dlp ~(keystone)]# cinder list +-----------+--------+------------------+--------+------+-------------+----------+-------------+----------------+ | ID | Status | Migration Status | Name | Size | Volume Type | Bootable | Multiattach | Attached to | +-----------+--------+------------------+--------+------+-------------+----------+-------------+----------------+ | 79906852- | in-use | - | disk01 | 10 | - | false | False | 74a217fa-4e64- | +-----------+--------+------------------+--------+------+-------------+----------+-------------+----------------+ |