Isilon Driver

The EMC manila driver framework (EMCShareDriver) utilizes EMC storage products to provide shared filesystems to OpenStack. The EMC manila driver is a plugin based driver which is designed to use different plugins to manage different EMC storage products.

The Isilon manila driver is a plugin for the EMC manila driver framework which allows manila to interface with an Isilon backend to provide a shared filesystem. The EMC driver framework with the Isilon plugin is referred to as the “Isilon Driver” in this document.

This Isilon Driver interfaces with an Isilon cluster via the REST Isilon Platform API (PAPI) and the RESTful Access to Namespace API (RAN).

Requirements

  • Isilon cluster running OneFS 7.2 or higher

Supported Operations

The following operations are supported on an Isilon cluster:

  • Create CIFS/NFS Share

  • Delete CIFS/NFS Share

  • Allow CIFS/NFS Share access

    • Only IP access type is supported for NFS and CIFS

    • Only RW access supported

  • Deny CIFS/NFS Share access

  • Create snapshot

  • Delete snapshot

  • Create share from snapshot

  • Extend share

Backend Configuration

The following parameters need to be configured in the manila configuration file for the Isilon driver:

  • share_driver = manila.share.drivers.dell_emc.driver.EMCShareDriver

  • driver_handles_share_servers = False

  • emc_share_backend = isilon

  • emc_nas_server = <IP address of Isilon cluster>

  • emc_nas_server_port = <port to use for Isilon cluster (optional)>

  • emc_nas_login = <username>

  • emc_nas_password = <password>

  • emc_nas_root_dir = <root directory path to create shares (e.g./ifs/manila)>

Restart of manila-share service is needed for the configuration changes to take effect.

Restrictions

The Isilon driver has the following restrictions:

  • Only IP access type is supported for NFS and CIFS.

  • Only FLAT network is supported.

The manila.share.drivers.dell_emc.driver Module

EMC specific NAS storage driver. This driver is a pluggable driver that allows specific EMC NAS devices to be plugged-in as the underlying backend. Use the Manila configuration variable “share_backend_name” to specify, which backend plugins to use.

class EMCShareDriver(*args, **kwargs)

Bases: manila.share.driver.ShareDriver

EMC specific NAS driver. Allows for NFS and CIFS NAS storage usage.

allow_access(context, share, access, share_server=None)

Allow access to the share.

check_for_setup_error()

Check for setup error.

create_share(context, share, share_server=None)

Is called to create share.

create_share_from_snapshot(context, share, snapshot, share_server=None, parent_share=None)

Is called to create share from snapshot.

create_snapshot(context, snapshot, share_server=None)

Is called to create snapshot.

delete_share(context, share, share_server=None)

Is called to remove share.

delete_snapshot(context, snapshot, share_server=None)

Is called to remove snapshot.

deny_access(context, share, access, share_server=None)

Deny access to the share.

do_setup(context)

Any initialization the share driver does while starting.

ensure_share(context, share, share_server=None)

Invoked to sure that share is exported.

extend_share(share, new_size, share_server=None)

Is called to extend share.

get_configured_ip_versions()

“Get allowed IP versions.

The supported versions are returned with list, possible values are: [4], [6], or [4, 6]

Drivers that assert ipv6_implemented = True must override this method. If the returned list includes 4, then shares created by this driver must have an IPv4 export location. If the list includes 6, then shares created by the driver must have an IPv6 export location.

Drivers should check that their storage controller actually has IPv4/IPv6 enabled and configured properly.

get_default_filter_function()

Get the default filter_function string.

Each driver could overwrite the method to return a well-known default string if it is available.

Returns

None

get_network_allocations_number()

Returns number of network allocations for creating VIFs.

get_share_server_network_info(context, share_server, identifier, driver_options)

Obtain network allocations used by share server.

Parameters

  • context – Current context.

  • share_server – Share server model.

  • identifier – A driver-specific share server identifier

  • driver_options – Dictionary of driver options to assist managing the share server

Returns

A list containing IP addresses allocated in the backend.

Example:

['10.10.10.10', 'fd11::2000', '192.168.10.10']
manage_existing(share, driver_options)

manage an existing share

manage_existing_snapshot(snapshot, driver_options)

manage an existing share snapshot

manage_existing_snapshot_with_server(snapshot, driver_options, share_server=None)

manage an existing share snapshot

manage_existing_with_server(share, driver_options, share_server=None)

manage an existing share

manage_server(context, share_server, identifier, driver_options)

Manage the share server and return compiled back end details.

Parameters

  • context – Current context.

  • share_server – Share server model.

  • identifier – A driver-specific share server identifier

  • driver_options – Dictionary of driver options to assist managing the share server

Returns

Identifier and dictionary with back end details to be saved in the database.

Example:

'my_new_server_identifier',{'server_name': 'my_old_server'}
revert_to_snapshot(context, snapshot, share_access_rules, snapshot_access_rules, share_server=None)

Reverts a share (in place) to the specified snapshot.

Does not delete the share snapshot. The share and snapshot must both be ‘available’ for the restore to be attempted. The snapshot must be the most recent one taken by Manila; the API layer performs this check so the driver doesn’t have to.

The share must be reverted in place to the contents of the snapshot. Application admins should quiesce or otherwise prepare the application for the shared file system contents to change suddenly.

Parameters

  • context – Current context

  • snapshot – The snapshot to be restored

  • share_access_rules – List of all access rules for the affected share

  • snapshot_access_rules – List of all access rules for the affected snapshot

  • share_server – Optional – Share server model or None

shrink_share(share, new_size, share_server=None)

Is called to shrink share.

unmanage(share)

Removes the specified share from Manila management.

Does not delete the underlying backend share.

For most drivers, this will not need to do anything. However, some drivers might use this call as an opportunity to clean up any Manila-specific configuration that they have associated with the backend share.

If provided share cannot be unmanaged, then raise an UnmanageInvalidShare exception, specifying a reason for the failure.

This method is invoked when the share is being unmanaged with a share type that has driver_handles_share_servers extra-spec set to False.

unmanage_server(server_details, security_services=None)

Unmanages the share server.

If a driver supports unmanaging of share servers, the driver must override this method and return successfully.

Parameters

  • server_details – share server backend details.

  • security_services – list of security services configured with this share server.

unmanage_snapshot(snapshot)

Removes the specified snapshot from Manila management.

Does not delete the underlying backend share snapshot.

For most drivers, this will not need to do anything. However, some drivers might use this call as an opportunity to clean up any Manila-specific configuration that they have associated with the backend share snapshot.

If provided share snapshot cannot be unmanaged, then raise an UnmanageInvalidShareSnapshot exception, specifying a reason for the failure.

This method is invoked when the snapshot that is being unmanaged belongs to a share that has its share type with driver_handles_share_servers extra-spec set to False.

unmanage_snapshot_with_server(snapshot, share_server=None)

Removes the specified snapshot from Manila management.

Does not delete the underlying backend share snapshot.

For most drivers, this will not need to do anything. However, some drivers might use this call as an opportunity to clean up any Manila-specific configuration that they have associated with the backend share snapshot.

If provided share snapshot cannot be unmanaged, then raise an UnmanageInvalidShareSnapshot exception, specifying a reason for the failure.

This method is invoked when the snapshot that is being unmanaged belongs to a share that has its share type with driver_handles_share_servers extra-spec set to True.

unmanage_with_server(share, share_server=None)

Removes the specified share from Manila management.

Does not delete the underlying backend share.

For most drivers, this will not need to do anything. However, some drivers might use this call as an opportunity to clean up any Manila-specific configuration that they have associated with the backend share.

If provided share cannot be unmanaged, then raise an UnmanageInvalidShare exception, specifying a reason for the failure.

This method is invoked when the share is being unmanaged with a share type that has driver_handles_share_servers extra-spec set to True.

update_access(context, share, access_rules, add_rules, delete_rules, share_server=None)

Update access to the share.

The manila.share.drivers.dell_emc.plugins.isilon.isilon Module

Isilon specific NAS backend plugin.

class IsilonStorageConnection(*args, **kwargs)

Bases: manila.share.drivers.dell_emc.plugins.base.StorageConnection

Implements Isilon specific functionality for EMC Manila driver.

allow_access(context, share, access, share_server)

Allow access to the share.

check_for_setup_error()

Check for setup error.

connect(emc_share_driver, context)

Connect to an Isilon cluster.

create_share(context, share, share_server)

Is called to create share.

create_share_from_snapshot(context, share, snapshot, share_server)

Creates a share from the snapshot.

create_snapshot(context, snapshot, share_server)

Is called to create snapshot.

delete_share(context, share, share_server)

Is called to remove share.

delete_snapshot(context, snapshot, share_server)

Is called to remove snapshot.

deny_access(context, share, access, share_server)

Deny access to the share.

ensure_share(context, share, share_server)

Invoked to ensure that share is exported.

extend_share(share, new_size, share_server=None)

Extends a share.

get_network_allocations_number()

Returns number of network allocations for creating VIFs.

setup_server(network_info, metadata=None)

Set up and configures share server with given network parameters.

teardown_server(server_details, security_services=None)

Teardown share server.

update_access(context, share, access_rules, add_rules, delete_rules, share_server=None)

Update share access.

update_share_stats(stats_dict)

TODO.