openstack/manila
Code Issues Proposed changes
04aa4ba141
manila/doc/source/admin/hdfs_native_driver.rst
Tom Barron a149c283d7 doc: move stuff from contributor to admin 
As agreed in weekly manila community meetings and at the
Queens PTG, several documents currently presented to contributors
are really of general interest to cloud administrators and should
be presented accordingly.

Move the docs on manila back ends, the feature support mapping,
capabilities and extra specs, and export locations and metatdata
to the admin section.

Change-Id: I6d9dec56890fb3a9bc0539c45c43233517cea048
2017-10-18 15:55:24 -04:00

3.1 KiB
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HDFS native driver

HDFS native driver is a plugin based on the OpenStack manila service, which uses Hadoop distributed file system (HDFS), a distributed file system designed to hold very large amounts of data, and provide high-throughput access to the data.

A manila share in this driver is a subdirectory in hdfs root directory. Instances talk directly to the HDFS storage backend with 'hdfs' protocol. And access to each share is allowed by user based access type, which is aligned with HDFS ACLs to support access control of multiple users and groups.

Network configuration

The storage backend and manila hosts should be in a flat network, otherwise, the L3 connectivity between them should exist.

Supported shared filesystems

  • HDFS (authentication by user)

Supported Operations

  • Create HDFS share
  • Delete HDFS share
  • Allow HDFS Share access
    • Only support user access type
    • Support level of access (ro/rw)
  • Deny HDFS Share access
  • Create snapshot
  • Delete snapshot
  • Create share from snapshot
  • Extend share

Requirements

  • Install HDFS package, version >= 2.4.x, on the storage backend
  • To enable access control, the HDFS file system must have ACLs enabled
  • Establish network connection between the manila host and storage backend

Manila driver configuration

  • share_driver = manila.share.drivers.hdfs.hdfs_native.HDFSNativeShareDriver
  • hdfs_namenode_ip = the IP address of the HDFS namenode, and only single

    namenode is supported now

  • hdfs_namenode_port = the port of the HDFS namenode service
  • hdfs_ssh_port = HDFS namenode SSH port
  • hdfs_ssh_name = HDFS namenode SSH login name
  • hdfs_ssh_pw = HDFS namenode SSH login password, this parameter is not

    necessary, if the following hdfs_ssh_private_key is configured

  • hdfs_ssh_private_key = Path to the HDFS namenode private key to ssh login

Known Restrictions

  • This driver does not support network segmented multi-tenancy model. Instead multi-tenancy is supported by the tenant specific user authentication
  • Only support for single HDFS namenode in Kilo release

The manila.share.drivers.hdfs.hdfs_native Module

manila.share.drivers.hdfs.hdfs_native