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dynamically configure an HTCondor node from a git repository

Project description

Hook to dynamically configure an HTCondor node from a git repository.

Hook Overview

The hook is integrated into a Condor config file to perform the following workflow:

  • Fetch a git repository to a local cache
  • Use patterns to select configuration files
  • Dynamically include configuration in condor

To integrate the hook, use the include command syntax in any HTCondor config file:

include command : condor-git-config https://git.mydomain.com/condor-repos/condor-configs.git

Usage Notes

The hook requires at least Python 3.3 to run.

Installation

Installation provides the condor-git-config executable. All other dependencies are installed automatically.

Stable release version

pip3 install condor_git_config

Current development version

git clone https://github.com/maxfischer2781/condor-git-config.git
./condor-git-config/setup.py install

Argument Files

The condor-git-config executable can use the @ [prefix character](https://docs.python.org/3/library/argparse.html#fromfile-prefix-chars) to read arguments from files. This allows you to prepare options externally

echo $(hostname -d) >> /etc/mycloud/domain

and have them used dynamically to adjust configuration

include command : condor-git-config --branch @/etc/mycloud/domain -- https://git.mydomain.com/condor-repos/condor-configs.git

Configuration Recursion

By default, condor-git-config will not recurse into sub-directories. This allows you to have additional configuration, which is conditionally integrated. For example, consider the following git repository tree:

|- commong.cfg
|- security.cfg
|- aaaron-cloud.cfg
|- aaaron-cloud/
|  |- overwrites.cfg
|  |- proxy.cfg
|- beebee-cloud.cfg

The aaaron-cloud folder will be ignored by default. You can conditionally include the *-cloud.cfg files like this:

--blacklist '.-cloud\.cfg' --whitelist @/etc/mycloud/flavour

This allows you to further include the files in aaaron-cloud by using include in aaaron-cloud.cfg:

# aaaron-cloud.cfg
include : $(GIT_CONFIG_CACHE_PATH)/overwrites.cfg
include : $(GIT_CONFIG_CACHE_PATH)/proxy.cfg

Project details


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