opa_cli resource

Use the opa_cli Chef InSpec audit resource to query Open Policy Agent (OPA) using an OPA policy file, a data file, and a query.

Availability

Install

This resource is distributed with Chef InSpec and is automatically available for use.

Syntax

An opa_cli resource block declares OPA policy configurations that can be tested.

describe opa_cli(policy: "example.rego", data: "input.json", query: "data.example.allow") do
  its(["result"]) { should eq "value" }
end

where

• data specifies the json formatted input data or file path.
• policy the path to policy file.
• query specifies the query to be run.
• its(["result"]) { should eq "value" } compares the results of the query against the expected result in the test

parameters

The opa_cli resource InSpec resource accepts policy, data, query, and opa_executable_path as parameters.

policy (required)

The path to the OPA policy file.

data (required)

An OPA query as a JSON data file or a string in JSON format.

query (required)

The query to be evaluated against policy and input data.

opa_executable_path

This is the full path to the OPA binary or EXE file used for running the OPA CLI or OPA commands. By default it will consider that the path is added in PATH variable.

Properties

result

The result property checks whether the resource query returns an empty result.

its('result') { should be nil }

allow

The allow property checks if specific input matches the policy defined in OPA. This matcher will not work if allow is not defined in the policy file.

its('allow') { should eq 'value' }

Examples

The following examples show how to use this Chef InSpec audit resource:

describe opa_cli(query: "data.example.allow", policy: "example.rego", data: "input.json", opa_executable_path: "./opa") do
  its("result") { shoule_not be nil }
  its(["result", 0, "expressions", 0, "value"]) { should eq true }
  its("allow") { should eq "true" }
end

The above example shows how the allow value can be fetched in two ways.

Matchers

For a full list of available matchers, see our Universal Matchers page.