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Library for working with the PuppetDB REST API.

Project description

pypuppetdb

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pypuppetdtb is a library to work with PuppetDB’s REST API. It is implemented using the requests library.

This library is a thin wrapper around the REST API providing some convinience functions and objects to request and hold data from PuppetDB.

To use this library you will need:
  • Python 2.6 or 2.7
  • Python 3.3

Installation

You can install this package from source or from PyPi.

$ pip install pypuppetdb
$ git clone https://github.com/nedap/pypuppetdb
$ python setup.py install

If you wish to hack on it clone the repository but after that run:

$ pip install -r requirements.txt

This will install all the runtime requirements of pypuppetdb and the dependencies for the test suite and generation of documentation.

Usage

Once you have pypuppetdb installed you can configure it to connect to PuppetDB and take it from there.

Connecting

The first thing you need to do is to connect with PuppetDB:

>>> from pypuppetdb import connect
>>> db = connect()

Nodes

The following will return a generator object yielding Node objects for every returned node from PuppetDB.

>>> nodes = db.nodes()
>>> for node in nodes:
>>>   print(node)
host1
host2
...

To query a single node the singular node() can be used:

>>> node = db.node('hostname')
>>> print(node)
hostname
Node scope

The Node objects are a bit more special in that they can query for facts and resources themselves. Using those methods from a node object will automatically add a query to the request scoping the request to the node.

>>> node = db.node('hostname')
>>> print(node.fact('osfamily'))
osfamily/hostname

Facts

>>> facts = db.facts('osfamily')
>>> for fact in facts:
>>>   print(fact)
osfamily/host1
osfamily/host2

That queries PuppetDB for the ‘osfamily’ fact and will yield Fact objects, one per node this fact is known for.

Resources

>>> resources = db.resources('file')

Will return a generator object containing all file resources you’re managing across your infrastructure. This is probably a bad idea if you have a big number of nodes as the response will be huge.

Catalogs

>>> catalog = db.catalog('hostname')
>>> for res in catalog.get_resources():
>>>     print(res)

Will return a Catalog object with the latest Catalog of the definded host. This catalog contains the defined Resources and Edges.

Getting Help

This project is still very new so it’s not inconceivable you’ll run into issues.

For bug reports you can file an issue. If you need help with something feel free to hit up @daenney by e-mail or find him on IRC. He can usually be found on IRCnet and Freenode and idles in #puppet.

There’s now also the #puppetboard channel on Freenode where we hang out and answer questions related to pypuppetdb and Puppetboard.

Documentation

API documentation is automatically generated from the docstrings using Sphinx’s autodoc feature.

Documentation will automatically be rebuilt on every push thanks to the Read The Docs webhook. You can find it here.

You can build the documentation manually by doing:

$ cd docs
$ make html

Doing so will only work if you have Sphinx installed, which you can acheive through:

$ pip install -r requirements.txt

Contributing

We welcome contributions to this library. However, there are a few ground rules contributors should be aware of.

License

This project is licensed under the Apache v2.0 License. As such, your contributions, once accepted, are automatically covered by this license.

Commit messages

Write decent commit messages. Don’t use swear words and refrain from uninformative commit messages as ‘fixed typo’.

The preferred format of a commit message:

docs/quickstart: Fixed a typo in the Nodes section.

If needed, elaborate further on this commit. Feel free to write a
complete blog post here if that helps us understand what this is
all about.

Fixes #4 and resolves #2.

If you’d like a more elaborate guide on how to write and format your commit messages have a look at this post by Tim Pope.

Tests

Commits are expected to contain tests or updates to tests if they add to or modify the current behaviour.

The test suite is powered by pytest and requires pytest, pytest-pep8, httpretty and pytest-httpretty which will be installed for you if you run:

$ pip install -r requirements.txt

To run the unit tests (the ones that don’t require a live PuppetDB):

$ py.test -v -m unit

If the tests pass, you’re golden. If not we’ll have to figure out why and fix that. Feel free to ask for help on this.

Changelog

0.1.0

Significant changes have been made in this release. The complete v3 API is now supported except for query pagination.

Most changes are backwards compatible except for a change in the SSL configuration. The previous behaviour was buggy and slightly misleading in the names the options took:

  • ssl has been renamed to ssl_verify and now defaults to True.
  • Automatically use HTTPS if ssl_key and ssl_cert are provided.

For additional instructions about getting SSL to work see the Quickstart in the documentation.

Deprecation

Support for API v2 will be dropped in the 0.2.x release series.

New features

The following features are only supported for API v3.

The node() and nodes() function have gained the following options:

  • with_status=False
  • unreported=2

When with_status is set to True an additional query will be made using the events-count endpoint scoped to the latest report. This will result in an additional events and status keys on the node object. status will be either of changed, unchanged or failed depending on if events contains successes or failures or none.

By default unreported is set to 2. This is only in effect when with_status is set to True. It means that if a node hasn’t checked in for two hours it will get a status of unreported instead.

New endpoints:

  • events-count: events_count()
  • aggregate-event-counts: aggregate_event_counts()
  • server-time: server_time()
  • version: current_version()
  • catalog: catalog()

New types:

  • pypuppetdb.types.Catalog
  • pypuppetdb.types.Edge

Changes to types:

  • pypuppetdb.types.Node now has: * status defaulting to None * events defaulting to None * unreported_time defaulting to None

0.0.4

Due to a fairly serious bug 0.0.3 was pulled from PyPi minutes after release.

When a bug was fixed to be able to query for all facts we accidentally introduced a different bug that caused the facts() call on a node to query for all facts because we were resetting the query.

  • Fix a bug where node.facts() was causing us to query all facts because the query to scope our request was being reset.

0.0.3

With the introduction of PuppetDB 1.5 a new API version, v3, was also introduced. In that same release the old /experimental endpoints were removed, meaning that as of PuppetDB 1.5 with the v2 API you can no longer get access to reports or events.

In light of this the support for the experimental endpoints has been completely removed from pypuppetdb. As of this release you can only get to reports and/or events through v3 of the API.

This release includes preliminary support for the v3 API. Everything that could be done with v2 plus the experimental endpoints is now possible on v3. However, more advanced funtionality has not yet been implemented. That will be the focus of the next release.

  • Removed dependency on pytz.
  • Fixed the behaviour of facts() and resources(). We can now correctly query for all facts or resources.
  • Fixed an issue with catalog timestampless nodes.
  • Pass along the timeout option to connect().
  • Added preliminary PuppetDB API v3 support.
  • Removed support for the experimental endpoints.
  • The connect() method defaults to API v3 now.

0.0.2

  • Fix a bug in setup.py preventing successful installation.

0.0.1

Initial release. Implements most of the v2 API.

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