configure winrm for packer

winrm packer

"user_data_file":"packer/packer-win-userdata.txt",
	"communicator": "winrm",
	"winrm_username":"Administrator",
	"winrm_port": 5985,
	"winrm_timeout": "10m"
  
###############################
<powershell>
# turn off PowerShell execution policy restrictions
Set-ExecutionPolicy -ExecutionPolicy Bypass -Scope LocalMachine

# configure WinRM
winrm quickconfig -q
winrm set winrm/config/winrs '@{MaxMemoryPerShellMB="2048"}'
winrm set winrm/config/winrs '@{MaxConcurrentUsers="100"}'
winrm set winrm/config/winrs '@{MaxProcessesPerShell="0"}'
winrm set winrm/config/winrs '@{MaxShellsPerUser="0"}'
winrm set winrm/config '@{MaxTimeoutms="7200000"}'
winrm set winrm/config/service '@{AllowUnencrypted="true"}'
winrm set winrm/config/service/auth '@{Basic="true"}'
winrm set winrm/config/service/auth '@{CredSSP="true"}'
winrm set winrm/config/client '@{TrustedHosts="*"}'


# open port 5985 in the internal Windows firewall to allow WinRM communication
netsh advfirewall firewall add rule name="WinRM 5985" protocol=TCP dir=in localport=5985 action=allow

net stop winrm
sc config winrm start=auto
net start winrm

</powershell>

Please guide on how to make this configuration automatically via packer build code. I am converting my windows 2019 iso to vhd on my local hyper-v hypervisor wherein I need to use winrm connectivity to call a powershell script to perform sysprep using provisioner block. But I am wondering to know that how can we automate this winrm configuration using packer build code to automatically configure all what is given here into the VM that I am building using packer code. Please suggest.

Take the section in between the <powershell> and </powershell> and add it to a file named setup-winrm.ps1. Make sure that this file is included in your Packer build as a floppy file.

floppy_files = ["./scripts/10/setup-winrm.ps1"]

And then in your Autounattended.xml you call that file from the floppy disk.

<SynchronousCommand wcm:action="add">
     <CommandLine>cmd.exe /c C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -File a:\setup-winrm.ps1</CommandLine>
     <Order>21</Order>
     <Description>Setup WinRM</Description>
 </SynchronousCommand>

I am not including everything here, but if you understand the process that should be enough to get you moving in the right direction.