openstack配置nfs作为cinder后端存储 2019-

目标：

更改cinder后端存储为nfs：

过程：
nfs服务端配置：

[root@controller ~]# cat /etc/exports
/nfs *(rw,no_root_squash,insecure)

查看nfs驱动名称：
class后面的NfsDriver便是。

[root@controller ~]# grep Nfs /usr/lib/python2.7/site-packages/cinder/volume/drivers/nfs.py
class NfsDriver(driver.ExtendVD, remotefs.RemoteFSDriver):
        super(NfsDriver, self).__init__(*args, **kwargs)
        super(NfsDriver, self).do_setup(context)
            raise exception.NfsException(msg)
            raise exception.NfsException(msg)
                raise exception.NfsException(msg)
                    raise exception.NfsException(six.text_type(e))
            raise exception.NfsNoSharesMounted()
            raise exception.NfsNoSuitableShareFound(
            raise exception.NfsNoSharesMounted()
        super(NfsDriver, self)._update_volume_stats()

修改cinder配置文件：

[root@node1 ~]# vi /etc/cinder/cinder.conf 
[DEFAULT]
rpc_backend = rabbit
auth_strategy = keystone
my_ip = 127.0.0.1
enabled_backends = nfs（原来是lvm）
glance_api_servers = http://node1:9292

添加以下内容：
[nfs]
volume_driver = cinder.volume.drivers.nfs.NfsDriver（nfs驱动：cinder/volume/drivers/nfs.py NfsDriver）
nfs_shares_config = /etc/cinder/nfs_shares（nfs配置文件）
nfs_mount_point_base = $state_path/mnt

[root@node1 ~]# cat /etc/cinder/nfs_shares 
192.168.100.10:/nfs
[root@node1 ~]# ll /etc/cinder/nfs_shares 
-rw-r-----. 1 root cinder 20 May 18 06:07 /etc/cinder/nfs_shares

重启服务：

[root@node1 ~]# systemctl restart openstack-cinder-volume

验证
cinder服务列表：

[root@node1 ~]# cinder service-list
+------------------+--------------+------+---------+-------+----------------------------+-----------------+
|      Binary      |     Host     | Zone |  Status | State |         Updated_at         | Disabled Reason |
+------------------+--------------+------+---------+-------+----------------------------+-----------------+
| cinder-scheduler |   node1   | nova | enabled |   up  | 2019-05-18T06:16:07.000000 |        -        |
|  cinder-volume   | node1@lvm | nova | enabled |  down | 2019-05-18T05:58:43.000000 |        -        |
|  cinder-volume   | node1@nfs | nova | enabled |   up  | 2019-05-18T06:16:12.000000 |        -        |
+------------------+--------------+------+---------+-------+----------------------------+-----------------+

测试
创建的云硬盘：

[root@node1 ~]# cinder list
+--------------------------------------+-----------+------+------+-------------+----------+-------------+
|                  ID                  |   Status  | Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+-----------+------+------+-------------+----------+-------------+
| 6c80d19a-eda5-4719-b1eb-704e04ccdde1 | available | test |  1   |      -      |  false   |             |
+--------------------------------------+-----------+------+------+-------------+----------+-------------+
[root@node1 ~]# df -hT
Filesystem          Type      Size  Used Avail Use% Mounted on
/dev/vda1           xfs        41G  2.4G   39G   6% /
devtmpfs            devtmpfs  3.9G     0  3.9G   0% /dev
tmpfs               tmpfs     3.9G  4.0K  3.9G   1% /dev/shm
tmpfs               tmpfs     3.9G   17M  3.9G   1% /run
tmpfs               tmpfs     3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/loop0          xfs       2.8G   33M  2.8G   2% /swift/node
tmpfs               tmpfs     799M     0  799M   0% /run/user/0
192.168.100.10:/nfs nfs4      250G   47G  204G  19% /var/lib/cinder/mnt/9721d8468baf04c147d34d153e1e77b2

成功