PowerShell script to quick list running EC2 instances based on a name pattern

ec2_instances.ps1

param (
    [string] $NamePattern = "Dummy-web-app-*",
    [string] $Status = "Running"
)

function Get-InstanceStatus () {
  $res = $(aws ec2 describe-instances --region us-east-1 --filters  "Name=tag:Name,Values=$NamePattern")
  $json = $res | ConvertFrom-Json
  $instances = $json.Reservations.Instances `
                  | Where-Object { $_.State.Name -eq $Status } `
                  | Select-Object InstanceId, `
                                  InstanceType, `
                                  PublicDnsName, `
                                  @{Label="Tags"; Expression={$_.Tags | Where-Object { $_.Key -eq "Name"}}}, `
                                  LaunchTime
  return $instances
}

###

"Listing EC2 instances:"
"- NamePattern: $NamePattern"
"- Status: $Status"

Get-InstanceStatus