Collect and cache metadata, run hooks on changes.
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Tony Breeds ec8b2576da Update to a newer hacking library
The older hacking library has a cap on pbr <2.0, with the recent 2.0.0
release of PBR it's causing failures in the pep8 job.

hacking isn't kept in sync via the typical proposal-bot updates.

Do it manually to clear the gate issue.

pep8 runtests: commands[0] | flake8
./os_collect_config/ W292 no newline at end of file
    return final_list

Change-Id: If863d2e190a4e1701ebf1fcb99a783075cda2556
Related-Bug: #1668848
6 years ago
os_collect_config Update to a newer hacking library 6 years ago
.coveragerc Change ignore-errors to ignore_errors 8 years ago
.gitignore Modify gitignore to ignore cover 9 years ago
.gitreview Update stackforge references to openstack 10 years ago
.testr.conf Remove env vars we don't use. 10 years ago
LICENSE Aligned tests with OpenStack standards. 10 years ago Ensure that README file makes it into the tarball 10 years ago
README.rst Show team and repo badges on README 7 years ago
os-collect-config-and-friends.odg Add diagram to os-collect-config README.rst 9 years ago
os-collect-config-and-friends.svg Add diagram to os-collect-config README.rst 9 years ago
requirements.txt Updated from global requirements 7 years ago
setup.cfg Revert "Support building wheels (PEP-427)" 10 years ago Updated from global requirements 8 years ago
test-requirements.txt Update to a newer hacking library 6 years ago
tox.ini Delete H803 from ignore list 6 years ago


Team and repository tags



Collect configuration from cloud metadata sources

What does it do?

It collects data from defined configuration sources and runs a defined hook whenever the metadata has been changed.




You must define what sources to collect configuration data from in /etc/os-collect-config.conf.

The format of this file is:


access_key_id = ABCDEFGHIJLMNOP01234567890
secret_access_key = 01234567890ABCDEFGHIJKLMNOP
path = MyResource
stack_name = my.stack

These sources will be polled and whenever any of them is changed, default.command will be run. A file will be written to the cache dir, os_config_files.json, which will be a json list of the file paths to the current copy of each metadata source. This list will also be set as a colon separated list in the environment variable OS_CONFIG_FILES for the command that is run. So in the example above, os-refresh-config would be executed with something like this in OS_CONFIG_FILES:


The previous version of the metadata from a source (if available) is present at $FILENAME.last.

When run without a command, the metadata sources are printed as a json document.

Quick Start


sudo pip install -U git+git://

Run it on an OpenStack instance with access to ec2 metadata:


That should print out a json representation of the entire ec2 metadata tree.

  1. Recommend using LibreOffice draw to edit os-collect-config-and-friends.odg and regenerate the svg file. Alternatively edit the svg directly, but remove the .odg file if that is done.↩︎