manila/doc/source/contributor/gpfs_driver.rst

GPFS Driver

GPFS driver uses IBM General Parallel File System (GPFS), a high-performance, clustered file system, developed by IBM, as the storage backend for serving file shares to the manila clients.

Supported shared filesystems

• NFS (access by IP)

Supported Operations

• Create NFS Share
• Delete NFS Share
• Create Share Snapshot
• Delete Share Snapshot
• Create Share from a Share Snapshot
• Allow NFS Share access
  • Currently only 'rw' access level is supported
• Deny NFS Share access

Requirements

• Install GPFS with server license, version >= 2.0, on the storage backend.
• Install Kernel NFS or Ganesha NFS server on the storage backend servers.
• If using Ganesha NFS, currently NFS Ganesha v1.5 and v2.0 are supported.
• Create a GPFS cluster and create a filesystem on the cluster, that will be used to create the manila shares.
• Enable quotas for the GPFS file system (mmchfs -Q yes).
• Establish network connection between the manila host and the storage backend.

Manila driver configuration setting

The following parameters in the manila configuration file need to be set:

• share_driver = manila.share.drivers.ibm.gpfs.GPFSShareDriver
• gpfs_share_export_ip = <IP to be added to GPFS export string>
• If the backend GPFS server is not running on the manila host machine, the following options are required to SSH to the remote GPFS backend server:

  • gpfs_ssh_login = <GPFS server SSH login name>

    and one of the following settings is required to execute commands over SSH:

  • gpfs_ssh_private_key = <path to GPFS server SSH private key for login>

  • gpfs_ssh_password = <GPFS server SSH login password>

The following configuration parameters are optional:

• gpfs_mount_point_base = <base folder where exported shares are located>
• gpfs_nfs_server_type = <KNFS|GNFS>
• gpfs_nfs_server_list = <list of the fully qualified NFS server names>
• gpfs_ssh_port = <ssh port number>

• knfs_export_options = <options to use when creating a share using kernel

  NFS server>

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

Known Restrictions

• The driver does not support a segmented-network multi-tenancy model but instead works over a flat network where the tenants share a network.
• While using remote GPFS node, with Ganesha NFS, 'gpfs_ssh_private_key' for remote login to the GPFS node must be specified and there must be a passwordless authentication already setup between the manila share service and the remote GPFS node.

The manila.share.drivers.ibm.gpfs Module

manila.share.drivers.ibm.gpfs