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12a495c631
* Add TCP reachability support on Linux for host resource This enhances the `host` resource on Linux targets by using netcat (if installed) to perform TCP reachability checks. Signed-off-by: Adam Leff <adam@leff.co> * documentation updates Signed-off-by: Adam Leff <adam@leff.co> * Appease rubocop Signed-off-by: Adam Leff <adam@leff.co>
85 lines
2 KiB
Text
85 lines
2 KiB
Text
---
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title: About the host Resource
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---
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# host
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Use the `host` InSpec audit resource to test the name used to refer to a specific host and its availability, including the Internet protocols and ports over which that host name should be available.
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## Syntax
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A `host` resource block declares a host name, and then (depending on what is to be tested) a port and/or a protocol:
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.. code-block:: ruby
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describe host('example.com', port: 80, protocol: 'tcp') do
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it { should be_reachable }
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end
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where
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* `host()` must specify a host name and may specify a port number and/or a protocol
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* `'example.com'` is the host name
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* `port:` is the port number
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* `protocol: 'name'` is the Internet protocol: TCP (`protocol: 'tcp'`), UDP (`protocol: 'udp'` or ICMP (`protocol: 'icmp'`))
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* `be_reachable` is a valid matcher for this resource
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## Matchers
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This InSpec audit resource has the following matchers:
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### be
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<%= partial "/shared/matcher_be" %>
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### be_reachable
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The `be_reachable` matcher tests if the host name is available:
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it { should be_reachable }
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### be_resolvable
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The `be_resolvable` matcher tests for host name resolution, i.e. "resolvable to an IP address":
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it { should be_resolvable }
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### cmp
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<%= partial "/shared/matcher_cmp" %>
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### eq
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<%= partial "/shared/matcher_eq" %>
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### include
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<%= partial "/shared/matcher_include" %>
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### ipaddress
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The `ipaddress` matcher tests if a host name is resolvable to a specific IP address:
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its('ipaddress') { should include '93.184.216.34' }
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### match
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<%= partial "/shared/matcher_match" %>
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## Examples
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The following examples show how to use this InSpec audit resource.
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### Verify host name is reachable over a specific protocol and port number
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describe host('example.com', port: 80, protocol: 'tcp') do
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it { should be_reachable }
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end
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### Verify that a specific IP address can be resolved
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describe host('example.com') do
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it { should be_resolvable }
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its('ipaddress') { should include '192.168.1.1' }
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end
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