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154 lines
No EOL
4.3 KiB
Text
---
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title: About the aws_elb Resource
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platform: aws
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---
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# aws\_elb
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Use the `aws_elb` Chef InSpec audit resource to test properties of a single AWS Elastic Load Balancer (ELB, also known as a Classic Load Balancer).
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To audit ELBs in bulk or to search, use `aws_elbs` (plural).
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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 v2.2.10 of InSpec.
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## Resource Parameters
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An `aws_elb` resource block declares the tests for a single AWS ELB by ELB name.
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describe aws_elb('my-elb') do
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it { should exist }
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end
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describe aws_elb(elb_name: 'my-elb') do
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its('instance_ids.count') { should cmp 2 }
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end
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<br>
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## Examples
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The following examples show how to use this Chef InSpec audit resource.
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### Test that an ELB does not exist
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describe aws_elb('bad-elb') do
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it { should_not exist }
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end
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### Test that an ELB has a presence in at least two availability zones
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describe aws_elb('web') do
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its('availability_zones.count') { should be > 1 }
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end
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<br>
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## Properties
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### availability\_zones
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Returns an array of strings identifying which availability zones in which the load balancer is located.
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# Verify we are in both us-east-2a and us-east-2b
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describe aws_elb('web-elb') do
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its('availability_zones') { should include 'us-east-2a' }
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its('availability_zones') { should include 'us-east-2b' }
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end
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### dns\_name
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Returns the FQDN of the load balancer. This is the hostname which is exposed to the world.
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# Ensure that the ELB has a DNS name
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describe aws_elb('web-elb') do
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its('dns_name') { should match /\.com/ }
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end
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### elb\_name
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The name of the ELB within AWS. The ELB name is unique within the region.
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# Ensure that the ELB's name is what we said it was
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describe aws_elb('web-elb') do
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its('elb_name') { should match /web-elb/ }
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end
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### external\_ports
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Returns an array of integers reflecting the public-facing ports on which the load balancer will be listening for traffic.
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# Ensure that we are listening on port 80 and nothing else
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describe aws_elb('web-elb') do
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its('external_ports') { should include 80 }
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its('external_ports.count') { should cmp 1 }
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end
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### instance\_ids
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Returns an array of strings reflecting the instance IDs of the EC2 instances attached to the ELB.
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# Ensure that a specific instance is attached
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describe aws_elb('web-elb') do
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its('instance_ids') { should include 'i-12345678' }
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end
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### internal\_ports
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Returns an array of integers reflecting the EC2-facing ports on which the load balancer will be sending traffic to.
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# Ensure that we are sending traffic to port 80 on the instances and nothing else
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describe aws_elb('web-elb') do
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its('internal_ports') { should include 80 }
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its('internal_ports.count') { should cmp 1 }
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end
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### security\_group\_ids
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Returns an array of strings reflecting the security group IDs (firewall rule sets) assigned to the ELB.
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# Ensure that a specific SG ID is assigned
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describe aws_elb('web-elb') do
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its('security_group_ids') { should include 'sg-12345678' }
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end
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### subnet\_ids
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Returns an array of strings reflecting the subnet IDs on which the ELB is located.
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# Ensure that the ELB is on a specific subnet
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describe aws_elb('web-elb') do
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its('subnet_ids') { should include 'subnet-12345678' }
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end
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### vpc\_id
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Returns a String reflecting the ID of the VPC in which the ELB is located.
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# Ensure that the ELB is on a specific VPC
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describe aws_elb('web-elb') do
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its('vpc_id') { should cmp 'vpc-12345678' }
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end
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<br>
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## Matchers
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This Chef InSpec audit resource has no special matchers. For a full list of available matchers, please visit our [Universal Matchers page](https://www.inspec.io/docs/reference/matchers/).
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## AWS Permissions
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Your [Principal](https://docs.aws.amazon.com/IAM/latest/UserGuide/intro-structure.html#intro-structure-principal) will need the `elasticloadbalancing:DescribeLoadBalancers` action set to Allow.
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You can find detailed documentation at [Authentication and Access Control for Your Load Balancers](https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/load-balancer-authentication-access-control.html) |