266 lines
7.1 KiB
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266 lines
7.1 KiB
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================
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EMC Unity driver
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================
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The EMC Shared File Systems service driver framework (EMCShareDriver)
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utilizes the EMC storage products to provide the shared file systems to
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OpenStack. The EMC driver is a plug-in based driver which is designed to
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use different plug-ins to manage different EMC storage products.
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The Unity plug-in manages the Unity system to provide shared filesystems.
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The EMC driver framework with the Unity plug-in is referred to as the
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Unity driver in this document.
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This driver performs the operations on Unity through RESTful APIs. Each back
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end manages one Storage Processor of Unity. Configure multiple Shared File
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Systems service back ends to manage multiple Unity systems.
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Requirements
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~~~~~~~~~~~~
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- Unity OE 4.1.x or higher.
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- StorOps 0.4.3 or higher is installed on Manila node.
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- Following licenses are activated on Unity:
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- CIFS/SMB Support
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- Network File System (NFS)
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- Thin Provisioning
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Supported shared filesystems and operations
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The driver supports CIFS and NFS shares.
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The following operations are supported:
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- Create a share.
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- Delete a share.
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- Allow share access.
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- Deny share access.
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- Create a snapshot.
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- Delete a snapshot.
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- Create a share from a snapshot.
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- Extend a share.
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Supported network types
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~~~~~~~~~~~~~~~~~~~~~~~
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- ``Flat``
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This type is fully supported by Unity share driver, however flat networks are
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restricted due to the limited number of tenant networks that can be created
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from them.
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- ``VLAN``
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We recommend this type of network topology in Manila.
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In most use cases, VLAN is used to isolate the different tenants and provide
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an isolated network for each tenant. To support this function, an
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administrator needs to set a slot connected with Unity Ethernet port in
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``Trunk`` mode or allow multiple VLANs from the slot.
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- ``VXLAN``
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Unity native VXLAN is still unavailable. However, with the `HPB
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<http://specs.openstack.org/openstack/neutron-specs/specs/kilo/ml2-hierarchical-port-binding.html>`_
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(Hierarchical Port Binding) in Networking and Shared file system services,
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it is possible that Unity co-exists with VXLAN enabled network environment.
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Supported MTU size
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~~~~~~~~~~~~~~~~~~
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Unity currently only supports 1500 and 9000 as the mtu size, the user can
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change the above mtu size from Unity Unisphere:
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#. In the Unisphere, go to `Settings`, `Access`, and then `Ethernet`.
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#. Double click the ethernet port.
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#. Select the `MTU` size from the drop down list.
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The Unity driver will select the port where mtu is equal to the mtu
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of share network during share server creation.
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Supported security services
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Unity share driver provides ``IP`` based authentication method support for
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``NFS`` shares and ``user`` based authentication method for ``CIFS`` shares
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respectively. For ``CIFS`` share, Microsoft Active Directory is the only
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supported security services.
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Pre-configurations
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~~~~~~~~~~~~~~~~~~
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On manila node
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--------------
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Python library ``storops`` is required to run Unity driver.
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Install it with the ``pip`` command.
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You may need root privilege to install python libraries.
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.. code-block:: console
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pip install storops
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On Unity system
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---------------
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#. Configure system level NTP server.
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Open ``Unisphere`` of your Unity system and navigate to:
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.. code-block:: console
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Unisphere -> Settings -> Management -> System Time and NTP
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Select ``Enable NTP synchronization`` and add your NTP server(s).
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The time on the Unity system and the Active Directory domains
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used in security services should be in sync. We recommend
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using the same NTP server on both the Unity system and Active
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Directory domains.
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#. Configure system level DNS server.
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Open ``Unisphere`` of your Unity system and navigate to:
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.. code-block:: console
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Unisphere -> Settings -> Management -> DNS Server
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Select ``Configure DNS server address manually`` and add your DNS server(s).
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Back end configurations
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~~~~~~~~~~~~~~~~~~~~~~~
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Following configurations need to be configured in ``/etc/manila/manila.conf``
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for the Unity driver.
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.. code-block:: ini
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share_driver = manila.share.drivers.dell_emc.driver.EMCShareDriver
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emc_share_backend = unity
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emc_nas_server = <management IP address of the Unity system>
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emc_nas_login = <user with administrator privilege>
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emc_nas_password = <password>
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unity_server_meta_pool = <pool name>
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unity_share_data_pools = <comma separated pool names>
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unity_ethernet_ports = <comma separated ports list>
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driver_handles_share_servers = True
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- ``emc_share_backend``
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The plugin name. Set it to `unity` for the Unity driver.
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- ``emc_nas_server``
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The management IP for Unity.
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- ``emc_nas_login``
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The user with administrator privilege.
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- ``emc_nas_password``
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Password for the user.
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- ``unity_server_meta_pool``
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The name of the pool to persist the meta-data of NAS server.
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- ``unity_share_data_pools``
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Comma separated list specifying the name of the pools to be used
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by this back end. Do not set this option if all storage pools
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on the system can be used.
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Wild card character is supported.
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Examples:
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.. code-block:: ini
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# Only use pool_1
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unity_share_data_pools = pool_1
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# Only use pools whose name stars from pool_
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unity_share_data_pools = pool_*
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# Use all pools on Unity
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unity_share_data_pools = *
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- ``unity_ethernet_ports``
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Comma separated list specifying the ethernet ports of Unity system
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that can be used for share. Do not set this option if all ethernet ports
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can be used.
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Wild card character is supported. Both the normal ethernet port and link
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aggregation port can be used by Unity share driver.
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Examples:
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.. code-block:: ini
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# Only use spa_eth1
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unity_ethernet_ports = spa_eth1
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# Use port whose name stars from spa_
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unity_ethernet_ports = spa_*
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# Use all Link Aggregation ports
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unity_ethernet_ports = sp*_la_*
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# Use all available ports
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unity_ethernet_ports = *
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.. note::
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Refer to :ref:`unity_file_io_load_balance` for performance
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impact.
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- ``driver_handles_share_servers``
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Unity driver requires this option to be as ``True``.
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Restart of ``manila-share`` service is needed for the configuration
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changes to take effect.
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.. _unity_file_io_load_balance:
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IO Load balance
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~~~~~~~~~~~~~~~
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The Unity driver automatically distributes the file interfaces per storage
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processor based on the option ``unity_ethernet_ports``. This balances IO
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traffic. The recommended configuration for ``unity_ethernet_ports`` specifies
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balanced ports per storage processor. For example:
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.. code-block:: ini
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# Use eth2 from both SPs
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unity_ethernet_ports = spa_eth2, spb_eth2
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Restrictions
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~~~~~~~~~~~~
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The Unity driver has following restrictions.
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- EMC Unity does not support the same IP in different VLANs.
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- Only Active Directory security service is supported and it is
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required to create CIFS shares.
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Driver options
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~~~~~~~~~~~~~~
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Configuration options specific to this driver:
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.. include:: ../../tables/manila-unity.inc
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