mirror of
https://github.com/inspec/inspec
synced 2024-11-27 15:10:44 +00:00
100 lines
2.7 KiB
Markdown
100 lines
2.7 KiB
Markdown
---
|
|
title: Resource DSL
|
|
---
|
|
|
|
# Resource DSL
|
|
|
|
Chef InSpec provides a mechanism for defining custom resources. These become
|
|
available with their respective names and provide easy functionality to
|
|
profiles.
|
|
|
|
## Resource location
|
|
|
|
Resources may be added to profiles in the libraries folder:
|
|
|
|
```bash
|
|
$ tree examples/profile
|
|
examples/profile
|
|
...
|
|
├── libraries
|
|
│ └── gordon_config.rb
|
|
```
|
|
|
|
## Resource structure
|
|
|
|
The smallest possible resource takes this form:
|
|
|
|
```ruby
|
|
class Tiny < Inspec.resource(1)
|
|
name 'tiny'
|
|
end
|
|
```
|
|
|
|
Resources are written as a regular Ruby class which inherits from
|
|
Inspec.resource. The number (1) specifies the version this resource
|
|
plugin targets. As Chef InSpec evolves, this interface may change and may
|
|
require a higher version.
|
|
|
|
The following attributes can be configured:
|
|
|
|
- name - Identifier of the resource (required)
|
|
- desc - Description of the resource (optional)
|
|
- example - Example usage of the resource (optional)
|
|
- supports - (Chef InSpec 2.0+) Platform restrictions of the resource (optional)
|
|
|
|
The following methods are available to the resource:
|
|
|
|
- inspec - Contains a registry of all other resources to interact with the operating system or target in general.
|
|
- skip\_resource - A resource may call this method to indicate that requirements aren't met. All tests that use this resource will be marked as skipped.
|
|
|
|
The following example shows a full resource using attributes and methods
|
|
to provide simple access to a configuration file:
|
|
|
|
```ruby
|
|
class GordonConfig < Inspec.resource(1)
|
|
name 'gordon_config'
|
|
|
|
# Restrict to only run on the below platforms (if none were given, all OS's supported)
|
|
supports platform_family: 'fedora'
|
|
supports platform: 'centos', release: '6.9'
|
|
# Supports `*` for wildcard matcher in the release
|
|
supports platform: 'centos', release: '7.*'
|
|
|
|
desc '
|
|
Resource description ...
|
|
'
|
|
|
|
example '
|
|
describe gordon_config do
|
|
its("signal") { should eq "on" }
|
|
end
|
|
'
|
|
|
|
# Load the configuration file on initialization
|
|
def initialize(path = nil)
|
|
@path = path || '/etc/gordon.conf'
|
|
@params = SimpleConfig.new( read_content )
|
|
end
|
|
|
|
# Expose all parameters of the configuration file.
|
|
def method_missing(name)
|
|
@params[name]
|
|
end
|
|
|
|
private
|
|
|
|
def read_content
|
|
f = inspec.file(@path)
|
|
# Test if the path exist and that it's a file
|
|
if f.file?
|
|
# Retrieve the file's contents
|
|
f.content
|
|
else
|
|
# If the file doesn't exist, skip all tests that use gordon_config
|
|
raise Inspec::Exceptions::ResourceSkipped, "Can't read config at #{@path}"
|
|
end
|
|
end
|
|
end
|
|
```
|
|
|
|
For a full example, see our [example resource](https://github.com/chef/inspec/blob/master/examples/profile/libraries/gordon_config.rb).
|