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Use the kernel_parameter Chef InSpec audit resource to test kernel parameters on Linux platforms. These parameters are located under /proc/cmdline.

Availability

Installation

This resource is distributed along with Chef InSpec itself. You can use it automatically.

Version

This resource first became available in v1.0.0 of InSpec.

Syntax

A kernel_parameter resource block declares a parameter and then a value to be tested:

describe kernel_parameter('path.to.parameter') do
  its('value') { should eq 0 }
end

where

• 'kernel.parameter' must specify a kernel parameter, such as 'net.ipv4.conf.all.forwarding'
• { should eq 0 } states the value to be tested

Examples

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

Test if global forwarding is enabled for an IPv4 address

describe kernel_parameter('net.ipv4.conf.all.forwarding') do
  its('value') { should eq 1 }
end

Test if global forwarding is disabled for an IPv6 address

describe kernel_parameter('net.ipv6.conf.all.forwarding') do
  its('value') { should eq 0 }
end

Test if an IPv6 address accepts redirects

describe kernel_parameter('net.ipv6.conf.interface.accept_redirects') do
  its('value') { should cmp 'true' }
end

Matchers

For a full list of available matchers, please visit our matchers page.