Linstor Storage Driver

Description

This driver allows for highly available storage using DRBD9 + Linstor in OpenNebula.

Development

To contribute bug patches or new features, you can use the github Pull Request feature. It is assumed that code and documentation are contributed under the Apache License 2.0.

Before submitting pull requests, please run the ./format.sh script found in the root of the project and test using tox.

Support for this addon can be found at the DRBD-User mailing list.

Authors

• Rene Peinthor [email protected]

Compatibility

• This addon is compatible with OpenNebula versions from 5.8 to 6.8
• It was tested with version 6.6
• This version of README.md describes the installation process for ONE 5.6 environments
• This is intended for use as an images datastore for use with either an NFS shared
• system datastore or a SSH system datastore

Requirements

• DRBD9 9.0.28+
• LINSTOR 1.18.0+

Features

• quickly attaches images to VMs
• fast image clones
• transfers images over the network in diskless mode
• allows for live migration even if the ssh system datastore is used

Installation

Follow these steps on the Front-End node only.

Clone the Repository and Run the Install Script.

Run the following commands as either oneadmin or whichever user is filling the ONE_USER role (or have the ONE_USER environment defined):

python setup.py install

Upgrading

To upgrade the driver, simply run the above installation script again.

From 2.x to 3.x

Linstor system datastore

In version 3.x we removed handling context images within Linstor plugin and fallback to the tm/ssh implementation.

This means you have to remove the CONTEXT_DISK_TYPE attribute from the Linstor system datastore, as we now use the default FILE type.

Context images are just read-only ISO files that are recreated everytime the VM is started and there is not much benefit form having them as DRBD resources.

The plugin will delete old context images on VM delete and undeploy actions. If you want to clean up the context images OpenNebula-vm-context-* you need to stop and start the VM that is still using it (no reboot).

Configuration

Please refer the DRBD user guide for configuration and documentation: Linstor User's guide

Usage

This driver will use Linstor to create new images and transfer them to hosts. Images are attached to hosts across the network using diskless mode. Images are replicated according to the deployment policy set in the datastore template.

License

Apache 2.0

DRBD9 and Linstor User's Guide

If you have any questions about setting up, tuning, or administrating DRBD9 or Linstor, be sure to check out the information provided in the Drbd User's Guide or the Linstor User's Guide