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3.4 Configuration Templates

Achieving certain behaviors in an HTCondor pool often requires setting the values of a number of configuration macros in concert with each other. We have added configuration templates as a way to do this more easily, at a higher level, without having to explicitly set each individual configuration macro.

Configuration templates are pre-defined; users cannot define their own templates.

Note that the value of an individual configuration macro that is set by a configuration template can be overridden by setting that configuration macro later in the configuration.

Detailed information about configuration templates (such as the macros they set) can be obtained using the condor_config_val use option (see 11). (This document does not contain such information because the condor_config_val command is a better way to obtain it.)

3.4.1 Configuration Templates: Using Predefined Sets of Configuration

Predefined sets of configuration can be identified and incorporated into the configuration using the syntax
  use <category name> : <template name>

The use key word is case insensitive. There are no requirements for white space characters surrounding the colon character. More than one <template name> identifier may be placed within a single use line. Separate the names by a space character. There is no mechanism by which the administrator may define their own custom <category name> or <template name>.

Each predefined <category name> has a fixed, case insensitive name for the sets of configuration that are predefined. Placement of a use line in the configuration brings in the predefined configuration it identifies.

As of version 8.5.6, some of the configuration templates take arguments (as described below).

3.4.2 Available Configuration Templates

There are four <category name> values. Within a category, a predefined, case insensitive name identifies the set of configuration it incorporates.

ROLE category
Describes configuration for the various roles that a machine might play within an HTCondor pool. The configuration will identify which daemons are running on a machine.

FEATURE category
Describes configuration for implemented features.

POLICY category
Describes configuration for the circumstances under which machines choose to run jobs.

SECURITY category
Describes configuration for an implemented security model.

3.4.3 Configuration Template Transition Syntax

For pools that are transitioning to using this new syntax in configuration, while still having some tools and daemons with HTCondor versions earlier than 8.1.6, special syntax in the configuration will cause those daemons to fail upon start up, rather than use the new, but misinterpreted, syntax. Newer daemons will ignore the extra syntax. Placing the @ character before the use key word causes the older daemons to fail when they attempt to parse this syntax.

As an example, consider the condor_startd as it starts up. A condor_startd previous to HTCondor version 8.1.6 fails to start when it sees:

@use feature : GPUs
Running an older condor_config_val also identifies the @use line as being bad. A condor_startd of HTCondor version 8.1.6 or more recent sees
use feature : GPUs

3.4.4 Configuration Template Examples

next up previous contents index
Next: 3.5 Configuration Macros Up: 3. Administrators' Manual Previous: 3.3 Introduction to Configuration   Contents   Index