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User Accounts
Methods for creating user accounts and propagating them across the cluster will be discussed. This includes an introduction to the authentication process (PAM), password files, and NIS(+). Other methods such as LDAP will only be given a overview with no implementation details.
8.2.1 Authentication Process
8.2.2 NIS and NIS+
8.2.3 Overview of LDAP
Software and Configuration File Consistancy
Maintaining copies of software and configuration files across nodes can consume a considerable amount of time and effort.
8.3.1 CF Engine
8.4 Node Cloning
Different strategies for cloning the nodes will be introduced. This includes the kickstart utility from Redhat, dump utilities, tar, system imager, and ghost. The creation of a boot disk that has the correct utilities for network building or restores of compute nodes will be given. Other methodologies such as bootp and the Intel network card boot utility will be presented.
8.4.1 Boot Disk Creation
8.4.2 Kickstart
8.4.3 Filesystem dump utility
8.4.4 GNU tar
8.4.5 SystemImage
8.4.6 Ghost
High Availability
Failover of cluster resources will be presented in this chapter.
8.5.1 Data and System Backup
8.5.2 Availability of headnode
8.5.3 Compute Node Failure
Security
For a system that will be connected to the internet it is very important that certain steps be followed to ensure the security of the cluster. SSH, tcp_wrappers, inetd, and auditing of system daemons will be introduced.
