cinder nedge #15

Supports: trusty


Deploy the ISCSI driver for a Cinder Backend Nedge Cluster


Provides integration between OpenStack Cinder block storage and NexentaEdge scale-out storage using ISCSI services.


This document is intended for Nexenta Partners and Nexenta customers to aid in the planning and execution of a NexentaEdge proof of concept (POC) evaluation. One deployment option for NexentaEdge leverages Canonical�s Juju management tool. The functionality of the NexentaEdge deployment tool (NEDEPLOY) and administration tool (NEADM) is contained in a collection of Juju charms. Individual charms allow you to deploy a NexentaEdge cluster with a specified number of nodes, add nodes to the cluster, and configure OpenStack Cinder and Swift storage services.

Use this document together with the NexentaEdge product guides and Configuration Guidelines as these documents outline suitable platforms and components for the solution. Additional product information on NexentaEdge can be found at

To aid in the execution of a POC, it is important to know the planned hardware and software configuration as well as the test cases. At a minimum, Nexenta recommends that a list of all components and suggested configuration is created prior to the actual software installation.

At a high level, this list should include:

  • Hardware configuration of all servers as well as their intended use case (gateway, storage node, etc)
  • OS Version and Configuration information such as network connectivity
  • Network infrastructure information, switch brand and model, as well as topology layout

Collecting this information and providing it to the resource that performs the installation greatly improves the efficiency of the process and reduces the risk of misconfiguration.

Server Requirements

Specific server configurations designed for NexentaEdge can be found in the Configuration Guidelines document, and Nexenta recommends that a minimum of 5 servers are used for POC evaluations that require Block I/O. Functional testing can be done on 3 servers, but it is important to understand that NexentaEdge has been designed to work with larger configurations and production deployments should start at 5 nodes.

At a minimum the servers should meet the following recommendation:

  • 4 HDD + 1 SSD
  • 64 GB RAM
  • Intel Xeon E5 v2/v3 CPU
  • Dual 10-GbE

When using Block services (iSCSI or NBD) each node needs to have at least one SSD available for Journaling. Additional detail is available in the NexentaEdge Configuration Guidelines.

Network Equipment Requirements

NexentaEdge make extensive use of modern networking technologies such as IPv6 and Multicasting. As a result, there are requirements on the networking equipment that must be fulfilled for successful deployments. Both Switches and Network Interface Cards must support 10Gigabit Ethernet, IPv6 and Multicasting.

As a general guideline, NexentaEdge should work with any 10 Gigabit Ethernet switch that supports:

  • Non-Blocking Enterprise class switch
  • Multicasting over IPv6
  • 9000 MTU jumbo frame support

If the switch supports advanced capabilities like Multicast Listener Discovery (MLD) snooping, Data Center Bridging (DCB), Priority Flow Control (PFC) and Enhanced Transmission Selection (ETS), this functionality can be leveraged by NexentaEdge to improve the networking performance and reliability.

A list of tested network switches can be found in the NexentaEdge Configuration Guidelines.


It is not recommended to run NexentaEdge with low-end/low-cost networking equipment as in general, they do not work 
well with IPv6, multicasting and do not guarantee non-blocking transfers.

Software Requirements

NexentaEdge Juju charms run on supported versions of software. They are:

  • NexentaEdge 1.1.0
  • Ubuntu Linux 14.04.3 LTS
  • Juju core 1.25 stable or newer
  • MAAS 1.9.0+bzr4533-0ubuntu1~trusty1 or newer
  • OpenStack releases Icehouse, Juno, Kilo, Liberty, Mitaka

Charms Configuration

  • Each NexentaEdge node must have replicast ethernet adapter connected to a dedicated replicast network. The 'replicast_eth' configuration option of charm must be configured.

  • Online NexentaEdge�s activation key should be entered into the�activation key� option for nexentaedge-mgmt charm.

  • By default, NexentaEdge�s charms are deployed without Docker container. To enable this option, set �nodocker� option to �false� in the charm or bundle configuration.

  • By default, NexentaEdge�s charms are deployed using the �balanced� storage profile. To change storage profile, edit �profile� option on each NexentaEdge charm. Available options are: �capacity�, �balanced� or �performance�.


The cinder-nexentaedge charm has no configuration part::

Contact Information

Author: Anton Skriptsov