84 lines
4.1 KiB
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84 lines
4.1 KiB
ReStructuredText
.. _shared_file_systems_network_plugins:
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================
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Network plug-ins
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================
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The Shared File Systems service architecture defines an abstraction layer for
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network resource provisioning and allowing administrators to choose from a
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different options for how network resources are assigned to their tenants’
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networked storage. There are a set of network plug-ins that provide a variety
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of integration approaches with the network services that are available with
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OpenStack.
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The Shared File Systems service may need a network resource provisioning if
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share service with specified driver works in mode, when a share driver manages
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lifecycle of share servers on its own. This behavior is defined by a flag
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``driver_handles_share_servers`` in share service configuration. When
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``driver_handles_share_servers`` is set to ``True``, a share driver will be
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called to create share servers for shares using information provided within a
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share network. This information will be provided to one of the enabled network
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plug-ins that will handle reservation, creation and deletion of network
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resources including IP addresses and network interfaces.
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What network plug-ins are available?
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------------------------------------
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There are three different network plug-ins and five python classes in the
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Shared File Systems service:
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#. Network plug-in for using the OpenStack Networking service. It allows to use
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any network segmentation that the Networking service supports. It is up to
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each share driver to support at least one network segmentation type.
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a) ``manila.network.neutron.neutron_network_plugin.NeutronNetworkPlugin``.
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This is a default network plug-in. It requires the ``neutron_net_id`` and
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the ``neutron_subnet_id`` to be provided when defining the share network
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that will be used for the creation of share servers. The user may define
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any number of share networks corresponding to the various physical
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network segments in a tenant environment.
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b) ``manila.network.neutron.neutron_network_plugin.
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NeutronSingleNetworkPlugin``. This is a simplification of the previous
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case. It accepts values for ``neutron_net_id`` and ``neutron_subnet_id``
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from the ``manila.conf`` configuration file and uses one network for all
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shares.
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When only a single network is needed, the NeutronSingleNetworkPlugin (1.b)
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is a simple solution. Otherwise NeutronNetworkPlugin (1.a) should be chosen.
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#. Network plug-in for working with OpenStack Networking from the Compute
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service. It supports either flat networks or VLAN-segmented networks.
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a) ``manila.network.nova_network_plugin.NovaNetworkPlugin``. This plug-in
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serves the networking needs when ``Nova networking`` is configured in
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the cloud instead of Neutron. It requires a single parameter,
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``nova_net_id``.
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b) ``manila.network.nova_network_plugin.NovaSingleNetworkPlugin``. This
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plug-in works the same way as
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``manila.network.nova_network_plugin.NovaNetworkPlugin``, except it takes
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``nova_net_id`` from the Shared File Systems service configuration
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file and creates the share servers using only one network.
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When only a single network is needed, the NovaSingleNetworkPlugin (2.b) is a
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simple solution. Otherwise NovaNetworkPlugin (2.a) should be chosen.
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#. Network plug-in for specifying networks independently from OpenStack
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networking services.
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a) ``manila.network.standalone_network_plugin.StandaloneNetworkPlugin``.
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This plug-in uses a pre-existing network that is available to the
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manila-share host. This network may be handled either by OpenStack or be
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created independently by any other means. The plug-in supports any type
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of network - flat and segmented. As above, it is completely up to the
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share driver to support the network type for which the network plug-in is
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configured.
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.. note::
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These network plug-ins were introduced in the OpenStack Kilo release. In
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the OpenStack Juno version, only NeutronNetworkPlugin is available.
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More information about network plug-ins can be found in `Manila developer documentation <http://docs.openstack.org/developer/manila/adminref/network_plugins.html>`_
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