List of AWS instances by TAG value using powershell - powershell

Question

We are taging our AWS instances, I will like to retrieve a list of ALL our instances (ELB, S3, EC2, Security Groups) by TAG reference. for instance we consistently TAG our resources with something like this:
{ "Key": "Project",
"Value": "bananas"
},
How can we obtain trough power-shell a list of ALL our resources that contain the TAG Project value "bananas"?
I was able to get all my EC2s using the below script:
$instance = Get-EC2Instance
-Filter #( #{name='tag:Project'; values="bananas"};
#{name='instance-state-code'; values = 16} )
| Select-Object -ExpandProperty instances #Get instance ID ignoring any terminated instances
$instance | Export-CSV "C:\ec2.csv"
But I'm not sure how to obtain all my tagged resources using one script.

Answer 1

Check out the AWS Resource Groups Tagging API cmdlets -- these are relatively new, so you may have to update your AWS Tools for PowerShell to the latest version to be able to use them.
Example
The example below calls Get-RGTResource for the tag Key=Project, Value=Bananas, and filters the response to all ResourceARNs that were retrieved. The ResourceARN is a unique identifier for each AWS resource, and you can use these as a starting point to call out to other AWS services to get more details about each associated resource.
(Get-RGTResource -TagFilter #{Key="Project"; Values = #("bananas")}).ResourceARN
Example Output
arn:aws:ec2:us-east-1:<accountid>:instance/i-abcd1234
arn:aws:ec2:us-west-2:<accountid>:vpc/vpc-abcd1234
arn:aws:ec2:us-east-2:<accountid>:security-group/sg-abcd1234
arn:aws:elasticloadbalancing:us-east-1:<accountid>:loadbalancer/abcd1234
arn:aws:elasticmapreduce:us-east-1:<accountid>:cluster/abcd1234
Further Reading
AWS Documentation - Get-RGTResource
AWS Documentation - Amazon Resource Names (ARNs)