Huawei Driver

Huawei NAS Driver is a plugin based the OpenStack Manila service. The Huawei NAS Driver can be used to provide functions such as the share and snapshot for virtual machines(instances) in OpenStack. Huawei NAS Driver enables the OceanStor V3 series V300R002 storage system to provide only network filesystems for OpenStack.

Requirements

• The OceanStor V3 series V300R002 storage system.
• The following licenses should be activated on V3 for File: * CIFS * NFS * HyperSnap License (for snapshot)

Supported Operations

The following operations is supported on V3 storage:

• Create CIFS/NFS Share
• Delete CIFS/NFS Share
• Allow CIFS/NFS Share access
  • Only IP access type is supported for NFS(ro/rw).
  • Only USER access type is supported for CIFS(ro/rw).
• Deny CIFS/NFS Share access
• Create snapshot
• Delete snapshot
• Manage CIFS/NFS share
• Support pools in one backend
• Extend share
• Shrink share
• Support multi RestURLs(<RestURL>)

Pre-Configurations on Huawei

1. Create a driver configuration file. The driver configuration file name must be the same as the manila_huawei_conf_file item in the manila_conf configuration file.

2. Configure Product. Product indicates the storage system type. For the OceanStor V3 series V300R002 storage systems, the driver configuration file is as follows:

<?xml version='1.0' encoding='UTF-8'?>
<Config>
    <Storage>
        <Product>V3</Product>
        <LogicalPortIP>x.x.x.x</LogicalPortIP>
        <RestURL>https://x.x.x.x:8088/deviceManager/rest/;
        https://x.x.x.x:8088/deviceManager/rest/</RestURL>
        <UserName>xxxxxxxxx</UserName>
        <UserPassword>xxxxxxxxx</UserPassword>
    </Storage>
    <Filesystem>
        <AllocType>Thin</AllocType>
        <StoragePool>xxxxxxxxx</StoragePool>
        <WaitInterval>3</WaitInterval>
        <Timeout>60</Timeout>
    </Filesystem>
</Config>

• Product is a type of a storage product. Set it to V3.
• LogicalPortIP is an IP address of the logical port.
• RestURL is an access address of the REST interface. Multi RestURLs can be configured in <RestURL>(separated by ”;”). When one of the RestURL failed to connect, driver will retry another automatically.
• UserName is a user name of an administrator.
• UserPassword is a password of an administrator.
• AllocType is a type of file system space allocation. Valid values are Thick or Thin.
• StoragePool is a name of a storage pool to be used.
• WaitInterval is the interval time of querying the file system status.
• Timeout is the timeout period for wating command execution of a device to complete.

Backend Configuration

Modify the manila.conf Manila configuration file and add share_driver and manila_huawei_conf_file items. Example for configuring a storage system:

• share_driver = manila.share.drivers.huawei.huawei_nas.HuaweiNasDriver
• manila_huawei_conf_file = /etc/manila/manila_huawei_conf.xml
• driver_handles_share_servers = False

Note

As far as Manila requires share type for creation of shares, make sure that used share type has extra spec driver_handles_share_servers set to False otherwise Huawei backend will be filtered by manila-scheduler. If you do not provide share type with share creation request then default share type and its extra specs will be used.

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

Share Types

When creating a share, a share type can be specified to determine where and how the share will be created. If a share type is not specified, the default_share_type set in the Manila configuration file is used.

Manila requires that the share type includes the driver_handles_share_servers extra-spec. This ensures that the share will be created on a backend that supports the requested driver_handles_share_servers (share networks) capability. For the Huawei driver, this must be set to False.

Another common Manila extra-spec used to determine where a share is created is share_backend_name. When this extra-spec is defined in the share type, the share will be created on a backend with a matching share_backend_name.

Manila “share types” may contain qualified extra-specs, -extra-specs that have significance for the backend driver and the CapabilityFilter. This commit makes the Huawei driver report the following boolean capabilities:

• capabilities:dedupe
• capabilities:compression
• capabilities:thin_provisioning
• capabilities:huawei_smartcache
  • huawei_smartcache:cachename
• capabilities:huawei_smartpartition
  • huawei_smartpartition:partitionname

The scheduler will choose a host that supports the needed capability when the CapabilityFilter is used and a share type uses one or more of the following extra-specs:

• capabilities:dedupe=’<is> True’ or ‘<is> False’
• capabilities:compression=’<is> True’ or ‘<is> False’
• capabilities:thin_provisioning=’<is> True’ or ‘<is> False’
• capabilities:huawei_smartcache=’<is> True’ or ‘<is> False’
  • huawei_smartcache:cachename=test_cache_name
• capabilities:huawei_smartpartition=’<is> True’ or ‘<is> False’
  • huawei_smartpartition:partitionname=test_partition_name

thin_provisioning will be reported as True for backends that use thin provisioned pool. Backends that use thin provisioning also support Manila’s over-subscription feature. ‘thin_provisioning’ will be reported as False for backends that use thick provisioned pool.

dedupe will be reported as True for backends that use deduplication technology.

compression will be reported as True for backends that use compression technology.

huawei_smartcache will be reported as True for backends that use smartcache technology. Adds SSDs into a high-speed cache pool and divides the pool into multiple cache partitions to cache hotspot data in random and small read I/Os.

huawei_smartpartition will be reported as True for backends that use smartpartition technology. Add share to the smartpartition named ‘test_partition_name’. Allocates cache resources based on service characteristics, ensuring the quality of critical services.

Note

snapshot_support will be reported as True for backends that support all snapshot functionalities, including create_snapshot, delete_snapshot, and create_share_from_snapshot. Huawei Driver does not support create_share_from_snapshot API now, so make sure that used share type has extra spec snapshot_support set to False.

Restrictions

The Huawei driver has the following restrictions:

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

The manila.share.drivers.huawei.huawei_nas Module

Huawei Nas Driver for Huawei storage arrays.

class HuaweiNasDriver(*args, **kwargs)

Bases: manila.share.driver.ShareDriver

Huawei Share Driver.

Executes commands relating to Shares. API version history:

1.0 - Initial version. 1.1 - Add shrink share.

Add extend share. Add manage share. Add share level(ro). Add smartx capabilities. Support multi pools in one backend.

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

Allow access to the share.

check_for_setup_error()

Returns an error if prerequisites aren’t met.

create_share(context, share, share_server=None)

Create a share.

create_snapshot(context, snapshot, share_server=None)

Create a snapshot.

delete_share(context, share, share_server=None)

Delete a share.

delete_snapshot(context, snapshot, share_server=None)

Delete a snapshot.

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

Deny access to the share.

do_setup(context)

Any initialization the huawei nas driver does while starting.

ensure_share(context, share, share_server=None)

Ensure that storages are mounted and exported.

extend_share(share, new_size, share_server=None)

get_backend_driver()

get_network_allocations_number()

Get number of network interfaces to be created.

get_pool(share)

Return pool name where the share resides on.

manage_existing(share, driver_options)

Manage existing share.

shrink_share(share, new_size, share_server=None)

Shrinks size of existing share.