Novell LINUX ENTERPRISE SERVER 11 - DEPLOYMENT, Руководство по развертыванию

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21.2 Rule-Based Autoinstallation
The following sections introduce the basic concept of rule-based installation using
AutoYaST and provide an example scenario that enables you to create your own custom
autoinstallation setup.
21.2.1 Understanding Rule-Based
Autoinstallation
Rule-based AutoYaST installation allows you to cope with heterogeneous hardware
environments:
• Does your site contain hardware of different vendors?
• Are the machines on your site of different hardware configuration (for example,
using different devices or using different memory and disk sizes)?
• Do you intend to install across different domains and need to distinguish between
them?
What rule-based autoinstallation does is, basically, generate a custom profile to match
a heterogeneous scenario by merging several profiles into one. Each rule describes one
particular distinctive feature of your setup (such as disk size) and tells AutoYaST which
profile to use when the rule matches. Several rules describing different features of your
setup are combined in an AutoYaST
rules.xml
file. The rule stack is then processed
and AutoYaST generates the final profile by merging the different profiles matching
the AutoYaST rules into one. To illustrate this procedure, refer to
Section 21.2.2, “Ex-
ample Scenario for Rule-Based Autoinstallation” (page 299).
Rule-based AutoYaST offers you great flexibility in planning and executing your SUSE
Linux Enterprise deployment. You can:
• Create rules for matching any of the predefined system attributes in AutoYaST
• Combine multiple system attributes (such as disk size and kernel architecture) into
one rule by using logical operators
Automated Installation 297