skew 0.17.0

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

1. Definitions.

"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.

"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.

"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.

"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.

"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.

"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.

"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).

"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.

"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."

"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.

2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.

3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.

4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:

(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and

(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and

(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and

(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.

You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.

5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.

6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.

7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.

8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.

9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.

END OF TERMS AND CONDITIONS

APPENDIX: How to apply the Apache License to your work.

To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.

Copyright {yyyy} {name of copyright owner}

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Description: skew
====

|Build Status|

|Code Health|

| **Skew** is a package for identifying and enumerating cloud resources.
| The name is a homonym for SKU (Stock Keeping Unit). Skew allows you to
| define different SKU ``schemes`` which are a particular encoding of a
| SKU. Skew then allows you to use this scheme pattern and regular
expressions
| based on the scheme pattern to identify and enumerate a resource or
set
| of resources.

| At the moment, the the only available ``scheme`` is the ``ARN``
scheme.
| The ``ARN`` scheme uses the basic structure of
| `Amazon Resource
Names <http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html>`__
(ARNs) to assign a unique identifier to every AWS
| resource.

An example ARN pattern would be:

::

arn:aws:ec2:us-west-2:123456789012:instance/i-12345678

| This pattern identifies a specific EC2 instance running in the
``us-west-2``
| region under the account ID ``123456789012``. The account ID is the
12-digit
| unique identifier for a specific AWS account as described
| `here <http://docs.aws.amazon.com/general/latest/gr/acct-identifiers.html>`__.
To allow **skew** to find your account number, you need to create a **skew**
YAML config file. By default, **skew** will look for your config file in
``~/.skew`` but you can use the ``SKEW_CONFIG`` environment variable to tell *skew*
where to find your config file if you choose to put it somewhere else. The
basic format of the *skew* config file is:

.. code:: yaml

---
accounts:
"123456789012":
profile: dev
"234567890123":
profile: prod

Within the ``accounts`` section, you create keys named after your 12-digit
account ID (as a string). Within that, you must have an entry called *profile*
that lists the profile name this account maps to within your AWS credential
file.


| The main purpose of skew is to identify resources or sets of resources
| across services, regions, and accounts and to quickly and easily
return the
| data associated with those resources. For example, if you wanted to
return
| the data associated with the example ARN above:

.. code:: python

from skew import scan

arn = scan('arn:aws:ec2:us-west-2:123456789012:instance/i-12345678')
for resource in arn:
print(resource.data)

| The call to ``scan`` returns an ARN object which implements the
| `iterator
pattern <https://docs.python.org/2/library/stdtypes.html#iterator-types>`__
| and returns a ``Resource`` object for each AWS resource that matches
the
| ARN pattern provided. The ``Resource`` object contains all of the data
| associated with the AWS resource in dictionary under the ``data``
attribute.

| Any of the elements of the ARN can be replaced with a regular
expression.
| The simplest regular expression is ``*`` which means all available
choices.
| So, for example:

.. code:: python

arn = scan('arn:aws:ec2:us-east-1:*:instance/*')

| would return an iterator for all EC2 instances in the ``us-east-1``
region
| found in all accounts defined in the config file.

| To find all DynamoDB tables in all US regions for the account ID
234567890123
| you would use:

.. code:: python

arn = scan('arn:aws:dynamodb:us-.*:234567890123:table/*')

CloudWatch Metrics
------------------

| In addition to making the metadata about a particular AWS resource
available
| to you, ``skew`` also tries to make it easy to access the available
CloudWatch
| metrics for a given resource.

| For example, assume that you had did a ``scan`` on the original ARN
above
| and had the resource associated with that instance available as the
variable
| ``instance``. You could do the following:

.. code:: python

>>> instance.metric_names
['CPUUtilization',
'NetworkOut',
'StatusCheckFailed',
'StatusCheckFailed_System',
'NetworkIn',
'DiskWriteOps',
'DiskReadBytes',
'DiskReadOps',
'StatusCheckFailed_Instance',
'DiskWriteBytes']
>>>

| The ``metric_names`` attribute returns the list of available
CloudWatch metrics
| for this resource. The retrieve the metric data for one of these:

.. code:: python

>>> instance.get_metric_data('CPUUtilization')
[{'Average': 0.134, 'Timestamp': '2014-09-29T14:04:00Z', 'Unit': 'Percent'},
{'Average': 0.066, 'Timestamp': '2014-09-29T13:54:00Z', 'Unit': 'Percent'},
{'Average': 0.066, 'Timestamp': '2014-09-29T14:09:00Z', 'Unit': 'Percent'},
{'Average': 0.134, 'Timestamp': '2014-09-29T13:34:00Z', 'Unit': 'Percent'},
{'Average': 0.066, 'Timestamp': '2014-09-29T14:19:00Z', 'Unit': 'Percent'},
{'Average': 0.068, 'Timestamp': '2014-09-29T13:44:00Z', 'Unit': 'Percent'},
{'Average': 0.134, 'Timestamp': '2014-09-29T14:14:00Z', 'Unit': 'Percent'},
{'Average': 0.066, 'Timestamp': '2014-09-29T13:29:00Z', 'Unit': 'Percent'},
{'Average': 0.132, 'Timestamp': '2014-09-29T13:59:00Z', 'Unit': 'Percent'},
{'Average': 0.134, 'Timestamp': '2014-09-29T13:49:00Z', 'Unit': 'Percent'},
{'Average': 0.134, 'Timestamp': '2014-09-29T13:39:00Z', 'Unit': 'Percent'}]
>>>

You can also customize the data returned rather than using the default
settings:

.. code:: python

>>> instance.get_metric_data('CPUUtilization', hours=8, statistics=['Average', 'Minimum', 'Maximum'])
[{'Average': 0.132,
'Maximum': 0.33,
'Minimum': 0.0,
'Timestamp': '2014-09-29T10:54:00Z',
'Unit': 'Percent'},
{'Average': 0.134,
'Maximum': 0.34,
'Minimum': 0.0,
'Timestamp': '2014-09-29T14:04:00Z',
'Unit': 'Percent'},
...,
{'Average': 0.066,
'Maximum': 0.33,
'Minimum': 0.0,
'Timestamp': '2014-09-29T08:34:00Z',
'Unit': 'Percent'},
{'Average': 0.134,
'Maximum': 0.34,
'Minimum': 0.0,
'Timestamp': '2014-09-29T08:04:00Z',
'Unit': 'Percent'}]
>>>

Filtering Data
--------------

| Each resource that is retrieved is a Python dictionary. Some of these
(e.g.
| an EC2 Instance) can be quite large and complex. Skew allows you to
filter
| the data returned by applying a `jmespath <http://jmespath.org>`__
query to
| the resulting data. If you aren't familiar with jmespath, check it
out.
| Its a very powerful query language for JSON data and has full support
in
| Python as well as a number of other languages such as Ruby, PHP, and
| Javascript. It is also the query language used in the
| `AWSCLI <https://aws.amazon.com/cli/>`__ so if you are familiar with
the
| ``--query`` option there, you can use the same thing with skew.

| To specify a query to be applied to results of a scan, simply append
| the query to the end of the ARN, separated by a ``|`` (pipe)
character.
| For example:

::

arn:aws:ec2:us-west-2:123456789012:instance/i-12345678|InstanceType

| Would retrieve the data for this particular EC2 instance and would
then
| filter the returned data through the (very) simple jmespath query to
which
| retrieves the value of the attribute ``InstanceType`` within the data.
The
| filtered data is available as the ``filtered_data`` attribute of the
| Resource object. The full, unfiltered data is still available as the
| ``data`` attribute.

More Examples
-------------

`Find Unattached
Volumes <https://gist.github.com/garnaat/73804a6b0bd506ee6075>`__

`Audit Security
Groups <https://gist.github.com/garnaat/4123f1aefe7d65df9b48>`__

`Find Untagged
Instances <https://gist.github.com/garnaat/11004f5661b4798d27c7>`__

.. |Build Status| image:: https://travis-ci.org/scopely-devops/skew.svg?branch=develop
:target: https://travis-ci.org/scopely-devops/skew
.. |Code Health| image:: https://landscape.io/github/scopely-devops/skew/develop/landscape.png
:target: https://landscape.io/github/scopely-devops/skew/develop

Platform: UNKNOWN
Classifier: Development Status :: 3 - Alpha
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: System Administrators
Classifier: Natural Language :: English
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 2.6
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4