X-IO volume driver¶
The X-IO volume driver for OpenStack Block Storage enables ISE products to be managed by OpenStack Block Storage nodes. This driver can be configured to work with iSCSI and Fibre Channel storage protocols. The X-IO volume driver allows the cloud operator to take advantage of ISE features like quality of service (QoS) and Continuous Adaptive Data Placement (CADP). It also supports creating thin volumes and specifying volume media affinity.
Requirements¶
ISE FW 2.8.0 or ISE FW 3.1.0 is required for OpenStack Block Storage support. The X-IO volume driver will not work with older ISE FW.
Supported operations¶
- Create, delete, attach, detach, retype, clone, and extend volumes.
- Create a volume from snapshot.
- Create, list, and delete volume snapshots.
- Manage and unmanage a volume.
- Get volume statistics.
- Create a thin provisioned volume.
- Create volumes with QoS specifications.
Configure X-IO Volume driver¶
To configure the use of an ISE product with OpenStack Block Storage, modify
your cinder.conf file as follows. Be careful to use the one that matches
the storage protocol in use:
Fibre Channel¶
volume_driver = cinder.volume.drivers.xio.XIOISEFCDriver
san_ip = 1.2.3.4 # the address of your ISE REST management interface
san_login = administrator # your ISE management admin login
san_password = password # your ISE management admin password
iSCSI¶
volume_driver = cinder.volume.drivers.xio.XIOISEISCSIDriver
san_ip = 1.2.3.4 # the address of your ISE REST management interface
san_login = administrator # your ISE management admin login
san_password = password # your ISE management admin password
iscsi_ip_address = ionet_ip # ip address to one ISE port connected to the IONET
Optional configuration parameters¶
| Configuration option = Default value | Description |
|---|---|
| [DEFAULT] | |
driver_use_ssl = False |
(Boolean) Tell driver to use SSL for connection to backend storage if the driver supports it. |
ise_completion_retries = 30 |
(Integer) Number on retries to get completion status after issuing a command to ISE. |
ise_connection_retries = 5 |
(Integer) Number of retries (per port) when establishing connection to ISE management port. |
ise_raid = 1 |
(Integer) Raid level for ISE volumes. |
ise_retry_interval = 1 |
(Integer) Interval (secs) between retries. |
ise_storage_pool = 1 |
(Integer) Default storage pool for volumes. |
Multipath¶
The X-IO ISE supports a multipath configuration, but multipath must be enabled on the compute node (see ISE Storage Blade Best Practices Guide). For more information, see X-IO Document Library.
Volume types¶
OpenStack Block Storage uses volume types to help the administrator specify attributes for volumes. These attributes are called extra-specs. The X-IO volume driver support the following extra-specs.
| Extra-specs name | Valid values | Description |
|---|---|---|
Feature:Raid |
1, 5 | RAID level for volume. |
Feature:Pool |
1 - n (n being number of pools on ISE) | Pool to create volume in. |
Affinity:Type |
cadp, flash, hdd | Volume media affinity type. |
Alloc:Type |
0 (thick), 1 (thin) | Allocation type for volume. Thick or thin. |
QoS:minIOPS |
n (value less than maxIOPS) | Minimum IOPS setting for volume. |
QoS:maxIOPS |
n (value bigger than minIOPS) | Maximum IOPS setting for volume. |
QoS:burstIOPS |
n (value bigger than minIOPS) | Burst IOPS setting for volume. |
Examples¶
Create a volume type called xio1-flash for volumes that should reside on ssd storage:
$ openstack volume type create xio1-flash
$ openstack volume type set --property Affinity:Type=flash xio1-flash
Create a volume type called xio1 and set QoS min and max:
$ openstack volume type create xio1
$ openstack volume type set --property QoS:minIOPS=20 xio1
$ openstack volume type set --property QoS:maxIOPS=5000 xio1
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