Powershell workflow script used to format and/or mount attached disk to a Coreos hosts in parallel.

Format-CoreOSDisk.ps1

Workflow Format-CoreOSDisk{
  PARAM(
    [parameter(mandatory=$true,position=0)]
    [string[]]
    $ComputerName,

    [parameter(mandatory=$false,position=1)]
    [hashtable]
    $HardDrive, #@{'/dev/sdb'='xfs@/mnt/data1';'/dev/sdc'='btrfs@/mnt/data2'}
    
    [parameter(mandatory=$false,position=2)]
    [string]
    $User,

    [parameter(mandatory=$false)]
    [string]
    $Password,
    
    [parameter(mandatory=$false)]
    [PSCredential]
    $Credential,
    
    [parameter(mandatory=$false)]
    [string]
    $Keyfile = "$env:userprofile\.ssh\id_rsa.key"
  )
  Set-StrictMode -Version 3

  # https://github.com/darkoperator/Posh-SSH
  Import-Module -Name Posh-SSH
  
  Foreach -parallel ($Computer in $Computername)
  {
    If($Password)
    {
      $SecureHostPassword = ConvertTo-SecureString "${Password}" -AsPlainText -Force
      $SSHCredential = New-Object System.Management.Automation.PSCredential ("${User}", $SecureHostPassword)
      
      $SSHSessionID = New-SSHSession -Force -Computername "${Computer}" -Credential $Credential
    }
    ElseIF($User)
    {
      If(-not $(Test-Path -Path $KeyFile)){Throw "${Computer}: SSH key file `"${$KeyFile}`" not found"}
      
      $SessionID = New-SSHSession -Force -Computername "${Computer}" -KeyFile $KeyFile -Credential "${User}"
    }
    Else
    {
      $SessionID = New-SSHSession -Force -Computername "${Computer}" -Credential $Credential
    }
    
    Foreach($Device in $Hardrive.Keys)
    {
      $Format = $($HardDrive[$Device]).Split('@')[0]
      $Mount  = $($HardDrive[$Device]).Split('@')[1]
      
      Invoke-SSHCommand -Session $SessionID -Command "sudo parted -s $($Device) mklabel gpt mkpart primary ${Format} 0% 85%"
      Invoke-SSHCommand -Session $SessionID -Command "sudo mkfs.${Format} $($Device) -f"
      Invoke-SSHCommand -Session $SessionID -Command "sudo blkid $($Device)"
      
      If($Mount)
      {
        Invoke-SSHCommand -SessionID $SessionID -Command "sudo mount -t ${Format} $($Device) ${Mount}"
      }
    }
    Remove-SSHSession -SessionID $SessionID
  }
}