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172 lines
4.5 KiB
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==============
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Datera drivers
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==============
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Datera iSCSI driver
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-------------------
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The Datera Elastic Data Fabric (EDF) is a scale-out storage software that
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turns standard, commodity hardware into a RESTful API-driven, intent-based
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policy controlled storage fabric for large-scale clouds. The Datera EDF
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integrates seamlessly with the Block Storage service. It provides storage
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through the iSCSI block protocol framework over the iSCSI block protocol.
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Datera supports all of the Block Storage services.
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System requirements, prerequisites, and recommendations
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-------------------------------------------------------
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Prerequisites
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~~~~~~~~~~~~~
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* Must be running compatible versions of OpenStack and Datera EDF.
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Please visit `here <https://github.com/Datera/cinder>`_ to determine the
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correct version.
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* All nodes must have access to Datera EDF through the iSCSI block protocol.
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* All nodes accessing the Datera EDF must have the following packages
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installed:
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* Linux I/O (LIO)
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* open-iscsi
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* open-iscsi-utils
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* wget
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.. config-table::
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:config-target: Datera
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cinder.volume.drivers.datera.datera_iscsi
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Configuring the Datera volume driver
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Modify the ``/etc/cinder/cinder.conf`` file for Block Storage service.
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* Enable the Datera volume driver:
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.. code-block:: ini
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[DEFAULT]
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# ...
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enabled_backends = datera
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# ...
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* Optional. Designate Datera as the default back-end:
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.. code-block:: ini
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default_volume_type = datera
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* Create a new section for the Datera back-end definition. The ``san_ip`` can
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be either the Datera Management Network VIP or one of the Datera iSCSI
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Access Network VIPs depending on the network segregation requirements:
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.. code-block:: ini
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volume_driver = cinder.volume.drivers.datera.DateraDriver
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san_ip = <IP_ADDR> # The OOB Management IP of the cluster
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san_login = admin # Your cluster admin login
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san_password = password # Your cluster admin password
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san_is_local = true
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datera_num_replicas = 3 # Number of replicas to use for volume
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Enable the Datera volume driver
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Verify the OpenStack control node can reach the Datera ``san_ip``:
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.. code-block:: bash
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$ ping -c 4 <san_IP>
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* Start the Block Storage service on all nodes running the ``cinder-volume``
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services:
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.. code-block:: bash
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$ service cinder-volume restart
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QoS support for the Datera drivers includes the ability to set the
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following capabilities in QoS Specs
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* **read_iops_max** -- must be positive integer
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* **write_iops_max** -- must be positive integer
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* **total_iops_max** -- must be positive integer
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* **read_bandwidth_max** -- in KB per second, must be positive integer
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* **write_bandwidth_max** -- in KB per second, must be positive integer
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* **total_bandwidth_max** -- in KB per second, must be positive integer
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.. code-block:: bash
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# Create qos spec
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$ openstack volume qos create --property total_iops_max=1000 total_bandwidth_max=2000 DateraBronze
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# Associate qos-spec with volume type
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$ openstack volume qos associate DateraBronze VOLUME_TYPE
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# Add additional qos values or update existing ones
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$ openstack volume qos set --property read_bandwidth_max=500 DateraBronze
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Supported operations
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~~~~~~~~~~~~~~~~~~~~
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* Create, delete, attach, detach, manage, unmanage, and list volumes.
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* Create, list, and delete volume snapshots.
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* Create a volume from a snapshot.
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* Copy an image to a volume.
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* Copy a volume to an image.
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* Clone a volume.
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* Extend a volume.
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* Support for naming convention changes.
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Configuring multipathing
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~~~~~~~~~~~~~~~~~~~~~~~~
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The following configuration is for 3.X Linux kernels, some parameters in
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different Linux distributions may be different. Make the following changes
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in the ``multipath.conf`` file:
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.. code-block:: text
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defaults {
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checker_timer 5
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}
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devices {
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device {
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vendor "DATERA"
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product "IBLOCK"
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getuid_callout "/lib/udev/scsi_id --whitelisted --
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replace-whitespace --page=0x80 --device=/dev/%n"
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path_grouping_policy group_by_prio
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path_checker tur
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prio alua
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path_selector "queue-length 0"
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hardware_handler "1 alua"
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failback 5
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}
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}
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blacklist {
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device {
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vendor ".*"
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product ".*"
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}
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}
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blacklist_exceptions {
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device {
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vendor "DATERA.*"
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product "IBLOCK.*"
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}
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}
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