Private/Test-RunOnEC2.ps1

<#
# Copyright (c) 2021 All Rights Reserved by the RWS Group for and on behalf of its affiliates and subsidiaries.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#>


<#
.Synopsis
    Test if the system is Run on EC2
.DESCRIPTION
    Test if the system is Run on EC2
.EXAMPLE
    Test-RunOnEC2
#>

function Test-RunOnEC2 {
    [OutputType([Boolean])]
    [CmdletBinding()]
    param (
    )

    begin {
        Write-Debug "PSCmdlet.ParameterSetName=$($PSCmdlet.ParameterSetName)"
        foreach ($psbp in $PSBoundParameters.GetEnumerator()) { Write-Debug "$($psbp.Key)=$($psbp.Value)" }
    }

    process {
        <# Conditions of being on Run on EC2
            AWSPowerShell module is installed
            EC2 metadata is reachable
        #>

        $isAWSToolInstalled = $null -ne (Get-Module -Name AWSPowerShell -ListAvailable)
        Write-Debug "isAWSToolInstalled=$isAWSToolInstalled"

        if ($isAWSToolInstalled) {
            $ec2MetadataPointReachable = $null -ne (Get-EC2InstanceMetadata -Category AmiId)

            Write-Debug "ec2MetadataPointReachable=$ec2MetadataPointReachable"

            if ($ec2MetadataPointReachable) {
                if (Get-TagEC2 | Where-Object -Property Name -EQ 'ISHStackConfiguration') {
                    return $true
                }
            }
        }
        return $false
    }

    end {

    }
}