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reviews ansible playbooks, roles and inventory and suggests improvements

Project description

# Setup

## Using pip

pip install ansible-review

## From source

git clone
export $PYTHONPATH=$PYTHONPATH:`pwd`/lib
export $PATH=$PATH:`pwd`/bin

# Usage

ansible-review reviewtarget [target2...]

ansible-review will review inventory files, role
files, python code (modules, plugins) and playbooks.

* The goal is that each file that changes in a
changeset should be reviewable simply by passing
those files as the arguments to ansible-review.
* Roles are slightly harder, and sub-roles are yet
harder still (currently just using `-R` to process
roles works very well, but doesn't examine the
structure of the role)
* Using `{{ playbook_dir }}` in sub roles is so far
very hard.
* This should work against various repository styles
- per-role repository
- roles with sub-roles
- per-playbook repository
* It should work with rolesfiles and with local roles.

## Typical approaches

* `git ls-files | xargs ansible-review` works well in
a roles repo to review the whole role. But it will
review the whole of other repos too.
* `git diff branch_to_compare | ansible-review` will
review only the changes between the branches and
surrounding context.

# Reviews

Reviews are nothing without some standards or checklists
against which to review.

ansible-review comes with a couple of built-in checks, such as
a playbook syntax checker and a hook to ansible-lint. You define your
own standards.

## Configuration

If your standards (and optionally inhouse lint rules) are set up, create
a configuration file in the appropriate location (this will depend on
your operating system)

The location can be found by using `ansible-review` with no arguments.

lint = /path/to/your/ansible/lint/rules
standards = /path/to/your/standards/rules

## Standards file

A standards file comprises a list of standards, and optionally some methods to
check those standards.

Create a file called (this can import other modules)

from ansiblereview include Standard, Result

use_modules_instead_of_command = Standard(dict(
name = "Use modules instead of commands",
version = "0.2",
check = ansiblelint('ANSIBLE0005,ANSIBLE0006'),
types = ['playbook', 'task'],

standards = [

When you add new standards, you should increment the version of your standards.
Your playbooks and roles should declare what version of standards you are
using, otherwise ansible-review assumes you're using the latest.

To add standards that are advisory, don't set the version. These will cause
a message to be displayed but won't constitute a failure.

An example standards file is available in

## Standards checks

A typical standards check will look like:

def check_playbook_for_something(candidate, settings):
result = Result(candidate.path) # empty result is a success with no output
with open(candidate.path, 'r') as f:
for (lineno, line) in enumerate(f):
if line is dodgy:
# enumerate is 0-based so add 1 to lineno
result.errors.append(Error(lineno+1, "Line is dodgy: reasons"))
return result

All standards check take a candidate object, which has a path attribute.
The type can be inferred from the class name (i.e. `type(candidate).__name__`)

They return a `Result` object, which contains a possibly empty list of `Error`
objects. `Error` objects are formed of a line number and a message. If the
error applies to the whole file being reviewed, set the line number to `None`.
Line numbers are important as `ansible-review` can review just ranges of files
to only review changes (e.g. through piping the output of `git diff` to

The ansiblelint check is ready out of the box, and just takes a list of
IDs or tags to check. You can point to your own ansible-lint rules
using the configuration file or `-d /path/to/ansible/lint/rules`

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