首先先使用“cinder delete”命令删除所有实例，释放磁盘空间。
停止cinder服务：
service openstack-cinder-api stop
service openstack-cinder-scheduler stop
service openstack-cinder-volume stop
备份配置文件：
cp -a /etc/cinder/cinder.conf /etc/cinder/cinder.conf.bak
cat /etc/cinder/cinder.conf.bak|grep -v '#'|grep -v '^$'>/etc/cinder/cinder.conf
修改配置文件：
[DEFAULT]
iscsi_ip_address=168.5.22.4
volume_backend_name=DEFAULT
iscsi_helper=tgtadm
volume_group=cinder
改为：
nfs_shares_config=/etc/cinder/nfs_shares
nfs_sparsed_volumes=true
nfs_mount_options=v3
volume_driver=cinder.volume.drivers.nfs.NfsDriver
创建挂载点配置文件：
echo '168.5.22.100:/volumes'>/etc/cinder/nfs_shares
chown root:cinder /etc/cinder/nfs_shares
chmod 0640 /etc/cinder/nfs_shares
查看cinder用户密码：
cat /etc/cinder/cinder.conf|grep connection
connection=mysql://cinder:eVUZuEyb@168.5.23.2/cinder?charset=utf8&read_timeout=60
密码是：eVUZuEyb
在任一节点重建数据库：
mysql -h 168.5.23.2 -u cinder -p -e 'drop database cinder;'
mysql -h 168.5.23.2 -u cinder -p -e 'create database cinder;'
su -s /bin/sh -c "cinder-manage db sync" cinder
启动cinder服务：
service openstack-cinder-volume start
service openstack-cinder-scheduler start
service openstack-cinder-api start
测试：
# source openrc
# nova list
+--------------------------------------+-----------------+--------+------------+-------------+---------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+-----------------+--------+------------+-------------+---------------------+
| 312ba535-4279-4338-862e-4892a8393c65 | admin-instance1 | ACTIVE | - | Running | VLAN549=168.5.49.33 |
+--------------------------------------+-----------------+--------+------------+-------------+---------------------+
# cinder create --display-name admin-instance1-vol01 50
+---------------------+--------------------------------------+
| Property | Value |
+---------------------+--------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| created_at | 2016-01-13T01:29:36.916617 |
| display_description | None |
| display_name | admin-instance1-vol01 |
| encrypted | False |
| id | 3f84fef7-50bc-4794-9d24-07e13967cd6b |
| metadata | {} |
| size | 50 |
| snapshot_id | None |
| source_volid | None |
| status | creating |
| volume_type | None |
+---------------------+--------------------------------------+
# cinder show 3f84fef7-50bc-4794-9d24-07e13967cd6b
+---------------------------------------+--------------------------------------+
| Property | Value |
+---------------------------------------+--------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| created_at | 2016-01-13T01:29:37.000000 |
| display_description | None |
| display_name | admin-instance1-vol01 |
| encrypted | False |
| id | 3f84fef7-50bc-4794-9d24-07e13967cd6b |
| metadata | {} |
| os-vol-host-attr:host | node-1.evecom.net#Generic_NFS |
| os-vol-mig-status-attr:migstat | None |
| os-vol-mig-status-attr:name_id | None |
| os-vol-tenant-attr:tenant_id | df54866bc83f4f5f96fae17b3810a343 |
| os-volume-replication:driver_data | None |
| os-volume-replication:extended_status | None |
| size | 50 |
| snapshot_id | None |
| source_volid | None |
| status | available |
| volume_type | None |
+---------------------------------------+--------------------------------------+
# nova volume-attach admin-instance1 3f84fef7-50bc-4794-9d24-07e13967cd6b
+----------+--------------------------------------+
| Property | Value |
+----------+--------------------------------------+
| device | /dev/vdb |
| id | 3f84fef7-50bc-4794-9d24-07e13967cd6b |
| serverId | 312ba535-4279-4338-862e-4892a8393c65 |
| volumeId | 3f84fef7-50bc-4794-9d24-07e13967cd6b |
+----------+--------------------------------------+