Installed - Novell OPEN ENTERPRISE SERVER 2 SP2 Installation Manual

2.6.3 If Your Tree Has Ever Contained an OES 1 Linux Server
with LUM and NSS Installed
Having NSS volumes on OES servers requires certain system-level modifications, most of which are
automatic. For more information, see
OES 2 SP2: Planning and Implementation Guide
"NetStorage, X-Tier, and Their System Users" on page 23
"An NSS Complication" on page 23
"eDirectory Solves the Basic Problem" on page 23
"ID Mismatches on OES 1" on page 24
"The OES 1 Solution: the nssid.sh Script" on page 24
"OES 2 SP1 and SP2 Require a New Approach" on page 24
"The OES 2 Solution: Standardizing the UIDs on all OES servers" on page 24
NetStorage, X-Tier, and Their System Users
By default, certain OES services, such as NetStorage, rely on a background Novell service named
X-Tier.
To run on an OES server, X-Tier requires two system-created users (named
) and one system-created group that the users belong to (named
novlxregd
An NSS Complication
The two X-Tier users mentioned above, and their group, are created on the local system when X-
Tier is installed. For example, they are created when you install NetStorage, and their respective
UIDs and GID are used to establish ownership of the service's directories and files.
For NetStorage to run, these X-Tier users and group must be able to read data on all volume types
that exist on the OES server.
As long as the server has only Linux traditional file systems, such as Ext3 and Reiser, NetStorage
runs well.
However, if the server has NSS volumes, an additional requirement is introduced. NSS data can only
be accessed by eDirectory users. Consequently, the local X-Tier users can't access NSS data, and
NetStorage can't run properly.
eDirectory Solves the Basic Problem
When NSS volumes are created on the server, the two X-Tier system users and their group are
moved to eDirectory and enabled for Linux User Management (LUM). (See
Management: Access to Linux for eDirectory
Implementation Guide.).
After the move to eDirectory, they can function as both eDirectory and POSIX* users, and they no
longer exist on the local system.
"System User and Group Management in OES 2
Users" in the OES 2 SP2: Planning and
SP2" in the
and
novlxsrvd
).
novlxtier
"Linux User
Preparing to Install OES 2 SP2 23