Dell DX6000 Manuale di istruzioni

Cluster Services Node (CSN) Release Notes

Version 2.0

Cluster Services Node (CSN) Release Notes: Version 2.0

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December 2010

Chapter 1. Version 2.0

1.1. Introduction

The DX Storage Cluster Services Node (CSN) streamlines installation and configuration of both the

network services required to run a DX Storage cluster and the Dell software used to interface with

it into a single integrated server. These release notes contain late-breaking information about DX

Storage CSN 2.0.

1.2. Changes in Release 2.0

This release enhances and extends the previous major release of the CSN in the following ways:

• The CSN now automatically configures all DX Storage nodes in multi-process mode with the

optimal number of processes for each node allocated at boot time. Please reference the 'Adding

DX Storage Nodes' section of the Installation and Configuration Guide for additional details.

• An option to choose a larger range for IP addresses on the internal/private network has been

added to support environments with a large number of DX Storage nodes. Existing installations

may take advantage of a larger network space by running the 'changeinternalnetwork' script

described in the Installation and Configuration Guide.

• The CSN now includes a reset script that can be used to return a server to a clean state after

installation, configuration or upgrade issues. Please refer to the CSN-Reset section of the

Installation and Configuration Guide for complete details.

• The CSN is now certified to install and run on Red Hat Enterprise Linux 5.5.

• The CSN now supports upgrade from version 1.0 or 1.0.1.

• The CSN will now check to see if log files need to be rotated hourly instead of daily to ensure files

do not become too large within 24 hours.

• The CSN now supports configuration of multiple subscriptions for a Replicator on the Replicator

configuration page of the Content Router tab on the CSN Console.

• A defect that prevented setting the power saving mode for the DX Storage cluster via SNMP has

been resolved.

1.3. Release 1.0 Features

This release includes the following features:

• The CSN provides installation and configuration of required network services to support a DX

Storage cluster, including DHCP, PXE, TFTP, syslog, NTP and several others.

• An integrated PXE network boot and configuration server is provided for DX Storage nodes that

are booted onto the CSN's internal network.

• Content Router is integrated and pre-configured as part of the CSN bundle to support replication

between two or more DX Storage clusters.

• The SCSP Proxy is integrated into CSN installation and configuration, providing a gateway for

SCSP clients on the external network, including remote clusters using Content Router, to send

and receive SCSP requests to and from DX Storage nodes on the CSN's internal network.

December 2010

• The CSN Console supports web-based, post-boot modification of network services configuration,

user access for both the admin interface and SNMP, software image management, and

configuration for DX Storage, the SCSP Proxy and Content Router.

• A Backup and Restore section in the CSN Console provides management of automatic

configuration file backups created by the CSN and saved into the DX Storage cluster. Additionally

the interface allows administrators to trigger a manual configuration file backup and restore a

backup manifest in the event of a system failure. Please see the 'Configuration File Backup and

Restore' section of the CSN Installation and Configuration Guide for additional details.

• A Licensing section in the CSN Console surfaces the ability to add and delete individual license

capacity and hardware compatibility keys and to publish these keys into an aggregate license file

used by the DX Storage cluster. Please see the 'Configuring Object Storage Cluster Licensing'

section of the CSN Installation and Configuration Guide for additional details.

• The CSN includes an SNMP MIB with operational and status information for all nodes in the

associated DX Storage cluster. Additionally, SNMP MIBs for both DX Content Router Publisher

and Replicator are available on the CSN.

1.4. Limitations of this Release

These are the known issues and operational limitations that exist in this release of DX Storage CSN.

•Automatic Backups with Server Reboots A server restart will trigger an automatic configuration

file backup due to an update to the firewall rules that occurs during shutdown.

•DX Storage Authentication and Authorization via Curl The version of curl included by

default in Red Hat version 5.5 is not recent enough to properly handle the authentication and

authorization features in DX Storage version 5.0. Integrators wishing to use curl to take advantage

of these new features will either need to compile a more recent version of curl on the CSN or use

a different server that already has a more recent version.

1.5. Upgrading the CSN

If upgrading a previously installed CSN to a new version, the same install script used for a new

installation can be used. Upgrade does not require any reconfiguration and all service states are

preserved from their previously configured values. The CSN will need to be rebooted after the

software is updated so administrators may wish to schedule the upgrade during off peak hours to

ensure DX Storage and DX Content Router activity are not disrupted.

Please refer to the Installation and Configuration Guide for step-by-step upgrade instructions.

1.6. Application and Configuration Notes

Special attention should be paid to the following items when configuring a CSN. More details can be

found in the CSN Installation and Configuration Guide.

•RedHat Administrative Tool Compatibility Both the RedHat Network Administration Tool and

the RedHat Security Level Configuration Tool are incompatible with the CSN because they alter

the expected location and/or configuration of critical network and firewall configuration files,

possibly interfering with initial CSN configuration or communications. To prevent conflicts, these

tools are removed during installation of the CSN.

•SELinux Errors While SELinux is run in permissive mode during the bootstrap process, SELinux

errors may still appear during bootstrap. These errors can be safely ignored and will not occur

again after a system reboot.

December 2010

•Bonding Errors After Completing Initial Configuration Administrators may see bonding errors

related to duplicate 'HWaddr' assignments after completing the initial configuration of a CSN for

the first time. These errors may be safely ignored.

•SSH Delays Logging into CSN Administrators may see delays logging into the CSN via SSH if

there are any non-existent or unreachable DNS servers specified in the resolv.conf file. Adding a

"UseDNS no" line to the /etc/ssh/sshd_config should remove the delay.

•Restoration of Service Status When a configuration backup is restored, all services will be

returned to their configured status (enabled or disabled) not the actual status of the service at the

time the backup was taken. For instance, if Publisher was configured to be running on a CSN but

happened to be stopped when a configuration backup was taken, the restoration of the backup

taken during this interval would restore the Publisher to its enabled status upon reboot.

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