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89 lines
2.4 KiB
Text
89 lines
2.4 KiB
Text
---
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title: About the aws_ec2_instances Resource
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platform: aws
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---
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# aws\_ec2\_instances
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Use the `aws_ec2_instances` Chef InSpec audit resource to test properties of some or all AWS EC2 instances. To audit a single EC2 instance, use `aws_ec2_instance` (singular).
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EC2 instances are the basic unit of computing within AWS. An instance is a virtual machine that contains a running OS, and may be created or destroyed by code.
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Each EC2 instance is uniquely identified by its ID.
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<br>
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## Availability
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### Installation
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This resource is distributed along with Chef InSpec itself. You can use it automatically.
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### Version
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This resource first became available in v2.1.72 of InSpec.
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## Syntax
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An `aws_ec2_instances` resource block collects a group of EC2 Instances and then tests that group.
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# Ensure you have exactly 3 instances
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describe aws_ec2_instances do
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its('instance_ids.count') { should cmp 3 }
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end
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# Use the Chef InSpec resource to enumerate IDs, then test in-depth using `aws_ec2_instance`.
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aws_ec2_instances.instance_ids.each do |instance_id|
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describe aws_ec2_instance(instance_id) do
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its('key_name') { should cmp 'admin-ssh-key' }
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end
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end
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<br>
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## Examples
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As this is the initial release of `aws_ec2_instances`, its limited functionality precludes examples.
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<br>
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## Filter Criteria
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This resource currently does not support any filter criteria; it will always fetch all instances in the region.
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## Properties
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### entries
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Provides access to the raw results of the query, which can be treated as an array of hashes. This can be useful for checking counts and other advanced operations.
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# Allow at most 100 EC2 Instances on the account
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describe aws_ec2_instances do
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its('entries.count') { should be <= 100}
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end
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### instance_ids
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Provides a list of the instance ids that were found in the query.
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describe aws_ec2_instances do
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its('instance_ids') { should include('i-12345678') }
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its('instance_ids.count') { should cmp 3) }
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end
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<br>
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## Matchers
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For a full list of available matchers, please visit our [Universal Matchers page](https://www.inspec.io/docs/reference/matchers/).
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### exist
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The control will pass if the filter returns at least one result. Use `should_not` if you expect zero matches.
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# Verify that at least one EC2 Instance exists.
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describe aws_ec2_instances
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it { should exist }
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end
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