generate CloudWatch graph souce for IOPS / Throughput of EBS.

New-CWGraphSource.ps1

[CmdletBinding()]
param (
    [Parameter(Mandatory)]
    [ValidateNotNullOrEmpty()]
    [string[]]
    $VolumeIds,
    [Parameter(Mandatory)]
    [ValidateNotNullOrEmpty()]
    [ValidateSet('IOPS', 'Throughput')]
    [string]
    $Graph
)

$Symbol = switch ($Graph) {
    'IOPS' { 'Ops' }
    'Throughput' { 'Bytes' }
    Default {}
}

$i = 1
$period = 300
$metrics = New-Object System.Collections.ArrayList
$VolumeIds | ForEach-Object {
    $Metrics.Add(@( @{
                'expression' = "(m${i}+m$($i+1))/${period}"
                'label' = "${Graph} of ${_}"
                'id' = "e${i}"
            } ))

    $Metrics.Add(@(
            'AWS/EBS'; "VolumeRead${Symbol}"; 'VolumeId'; $_
            @{ 'id' = "m${i}"; 'visible' = $false }
        ))
    $Metrics.Add(@(
            'AWS/EBS'; "VolumeWrite${Symbol}"; 'VolumeId'; $_
            @{ 'id' = "m$($i+1)"; 'visible' = $false }
        ))
    $i += 2
} | Out-Null

[PSCustomObject]@{
    'metrics' = $metrics
    'view' = 'timeSeries'
    'stacked' = $false
    'region' = 'ap-northeast-1'
    'stat' = 'Sum'
    'period' = $period
    'title' = $Graph
} | ConvertTo-Json -Depth 10