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Working on Jenkins setup for Packer based workflow
Raw
README.md

Breadcrumbs

Docs on Azure VM agents

https://plugins.jenkins.io/azure-vm-agents

I needed nonstandard software (Packer, Hyper-V, ...) so I had to choose Image Configuration = Advanced, then choose the image manually

Finding Windows image

az vm image list -p MicrosoftWindowsServer --all -otable

Image I wanted:

Offer                    Publisher                      Sku                                             Urn                                                                                                            Version
-----------------------  -----------------------------  ----------------------------------------------  --------------...
...
WindowsServerSemiAnnual  MicrosoftWindowsServer         Datacenter-Core-1709-smalldisk

Configuring the agents

I translated the above to

  • offer WindowsServerSemiAnnual
  • publisher MicrosoftWindowsServer
  • sku Datacenter-Core-1709-smalldisk
  • version latest

Used custom init script initscript.ps1 in this same gist

Set label to be called "win", and set that for the node in the pipeline

Scheduled a job, and it creates the VM but deletes it after 20 minutes

Figuring out why the nodes don't come up

Well, something's using a custom script extension. Let's go look at what it's trying to run, and run it again so we can see if it fails.

PS C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0> type .\win-agent0127082024664init.ps1
Set-ExecutionPolicy Unrestricted

$source = "https://github.com/PowerShell/Win32-OpenSSH/releases/download/v0.0.16.0/OpenSSH-Win64.zip"
$destination = "C:\OpenSSH-Win64.zip"
$webClient = New-Object System.Net.WebClient
$webClient.DownloadFile($source, $destination)

$shell_app=new-object -com shell.application
$zip_file = $shell_app.namespace($destination)
$dir='C:\Program Files\OpenSSH-Win64'
mkdir $dir
$destination = $shell_app.namespace('C:\Program Files')
$destination.Copyhere($zip_file.items(), 0x14)
[System.Environment]::SetEnvironmentVariable("PATH", $Env:Path + ";${dir}", "Machine")

Set-Location $dir

.\install-sshd.ps1
.\ssh-keygen.exe -A
.\FixHostFilePermissions.ps1 -Confirm:$false

Start-Service ssh-agent
Start-Service sshd

New-NetFirewallRule -Protocol TCP -LocalPort 22 -Direction Inbound -Action Allow -DisplayName SSH
Set-Service sshd -StartupType Automatic
Set-Service ssh-agent -StartupType Automatic

PS C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0> dir 'C:\Program Files\OpenSSH-Win64\'
PS C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0> new-object -com shell.application

Application        Parent
-----------        ------
System.__ComObject System.__ComObject


PS C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0> dir


    Directory: C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----        1/27/2018   8:26 AM           1024 win-agent0127082024664init.ps1


PS C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0> .\win-agent0127082024664init.ps1
Error HRESULT E_FAIL has been returned from a call to a COM component.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:9 char:1
+ $zip_file = $shell_app.namespace($destination)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (:) [], COMException
    + FullyQualifiedErrorId : System.Runtime.InteropServices.COMException

mkdir : An item with the specified name C:\Program Files\OpenSSH-Win64 already exists.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:11 char:1
+ mkdir $dir
+ ~~~~~~~~~~
    + CategoryInfo          : ResourceExists: (C:\Program Files\OpenSSH-Win64:String) [New-Item], IOException
    + FullyQualifiedErrorId : DirectoryExist,Microsoft.PowerShell.Commands.NewItemCommand

You cannot call a method on a null-valued expression.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:13 char:1
+ $destination.Copyhere($zip_file.items(), 0x14)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull

.\install-sshd.ps1 : The term '.\install-sshd.ps1' is not recognized as the name of a cmdlet, function, script file,
or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and
try again.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:18 char:1
+ .\install-sshd.ps1
+ ~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (.\install-sshd.ps1:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

.\ssh-keygen.exe : The term '.\ssh-keygen.exe' is not recognized as the name of a cmdlet, function, script file, or
operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try
again.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:19 char:1
+ .\ssh-keygen.exe -A
+ ~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (.\ssh-keygen.exe:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

.\FixHostFilePermissions.ps1 : The term '.\FixHostFilePermissions.ps1' is not recognized as the name of a cmdlet,
function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the
path is correct and try again.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:20 char:1
+ .\FixHostFilePermissions.ps1 -Confirm:$false
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (.\FixHostFilePermissions.ps1:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

Start-Service : Cannot find any service with service name 'ssh-agent'.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:22 char:1
+ Start-Service ssh-agent
+ ~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (ssh-agent:String) [Start-Service], ServiceCommandException
    + FullyQualifiedErrorId : NoServiceFoundForGivenName,Microsoft.PowerShell.Commands.StartServiceCommand

Start-Service : Cannot find any service with service name 'sshd'.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:23 char:1
+ Start-Service sshd
+ ~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (sshd:String) [Start-Service], ServiceCommandException
    + FullyQualifiedErrorId : NoServiceFoundForGivenName,Microsoft.PowerShell.Commands.StartServiceCommand



Name                  : {f354258b-2ad7-439b-851a-78f13f469ace}
DisplayName           : SSH
Description           :
DisplayGroup          :
Group                 :
Enabled               : True
Profile               : Any
Platform              : {}
Direction             : Inbound
Action                : Allow
EdgeTraversalPolicy   : Block
LooseSourceMapping    : False
LocalOnlyMapping      : False
Owner                 :
PrimaryStatus         : OK
Status                : The rule was parsed successfully from the store. (65536)
EnforcementStatus     : NotApplicable
PolicyStoreSource     : PersistentStore
PolicyStoreSourceType : Local

Set-Service : Service sshd was not found on computer '.'.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:26 char:1
+ Set-Service sshd -StartupType Automatic
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (.:String) [Set-Service], InvalidOperationException
    + FullyQualifiedErrorId : InvalidOperationException,Microsoft.PowerShell.Commands.SetServiceCommand

Set-Service : Service ssh-agent was not found on computer '.'.
At C:\Packages\Plugins\Microsoft.Compute.CustomScriptExtension\1.9\Downloads\0\win-agent0127082024664init.ps1:27 char:1
+ Set-Service ssh-agent -StartupType Automatic
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (.:String) [Set-Service], InvalidOperationException
    + FullyQualifiedErrorId : InvalidOperationException,Microsoft.PowerShell.Commands.SetServiceCommand

Hmm, COM failure. well, this looks suspicious

$shell_app=new-object -com shell.application
$zip_file = $shell_app.namespace($destination)
$dir='C:\Program Files\OpenSSH-Win64'
mkdir $dir
$destination = $shell_app.namespace('C:\Program Files')
$destination.Copyhere($zip_file.items(), 0x14)

Yeah, that's now going to work on an OS without a shell. Why didn't they use Expand-Archive ? Let's give it a go

PS C:\Program Files\OpenSSH-Win64> Expand-Archive C:\OpenSSH-Win64.zip
PS C:\Program Files\OpenSSH-Win64> dir


    Directory: C:\Program Files\OpenSSH-Win64


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----        1/27/2018   8:34 AM                OpenSSH-Win64


PS C:\Program Files\OpenSSH-Win64> cd .\OpenSSH-Win64\
PS C:\Program Files\OpenSSH-Win64\OpenSSH-Win64> dir


    Directory: C:\Program Files\OpenSSH-Win64\OpenSSH-Win64


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----        1/27/2018   8:34 AM                OpenSSH-Win64


PS C:\Program Files\OpenSSH-Win64\OpenSSH-Win64> cd .\OpenSSH-Win64\
PS C:\Program Files\OpenSSH-Win64\OpenSSH-Win64\OpenSSH-Win64> dir


    Directory: C:\Program Files\OpenSSH-Win64\OpenSSH-Win64\OpenSSH-Win64


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----        6/12/2017   6:00 PM           2276 FixHostFilePermissions.ps1
-a----        6/12/2017   6:00 PM            609 FixUserFilePermissions.ps1
-a----        5/24/2017  12:37 PM           4178 install-sshd.ps1
-a----        5/12/2017  10:24 AM        1462907 libcrypto-41.dll
-a----        6/12/2017   6:00 PM           1053 OpenSSHUtils.psd1
-a----        6/13/2017   2:38 PM          23402 OpenSSHUtils.psm1
-a----        6/15/2017   5:05 PM         317440 scp.exe
-a----        6/15/2017   5:05 PM         334848 sftp-server.exe
-a----        6/15/2017   5:05 PM         384512 sftp.exe
-a----        6/15/2017   5:05 PM         515072 ssh-add.exe
-a----        6/15/2017   5:05 PM         607232 ssh-agent.exe
-a----        6/15/2017   5:05 PM         632832 ssh-keygen.exe
-a----        6/15/2017   5:05 PM         569344 ssh-keyscan.exe
-a----        6/15/2017   5:05 PM         133632 ssh-shellhost.exe
-a----        6/15/2017   5:05 PM         856576 ssh.exe
-a----        6/15/2017   5:09 PM         899584 sshd.exe
-a----        4/24/2017   1:37 PM           3520 sshd_config
-a----        11/8/2016  10:59 AM            567 uninstall-sshd.ps1


PS C:\Program Files\OpenSSH-Win64\OpenSSH-Win64\OpenSSH-Win64> move * ..\..
PS C:\Program Files\OpenSSH-Win64\OpenSSH-Win64\OpenSSH-Win64> cd ..
PS C:\Program Files\OpenSSH-Win64\OpenSSH-Win64> cd ..
PS C:\Program Files\OpenSSH-Win64> dir


    Directory: C:\Program Files\OpenSSH-Win64


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----        1/27/2018   8:34 AM                OpenSSH-Win64
-a----        6/12/2017   6:00 PM           2276 FixHostFilePermissions.ps1
-a----        6/12/2017   6:00 PM            609 FixUserFilePermissions.ps1
-a----        5/24/2017  12:37 PM           4178 install-sshd.ps1
-a----        5/12/2017  10:24 AM        1462907 libcrypto-41.dll
-a----        6/12/2017   6:00 PM           1053 OpenSSHUtils.psd1
-a----        6/13/2017   2:38 PM          23402 OpenSSHUtils.psm1
-a----        6/15/2017   5:05 PM         317440 scp.exe
-a----        6/15/2017   5:05 PM         334848 sftp-server.exe
-a----        6/15/2017   5:05 PM         384512 sftp.exe
-a----        6/15/2017   5:05 PM         515072 ssh-add.exe
-a----        6/15/2017   5:05 PM         607232 ssh-agent.exe
-a----        6/15/2017   5:05 PM         632832 ssh-keygen.exe
-a----        6/15/2017   5:05 PM         569344 ssh-keyscan.exe
-a----        6/15/2017   5:05 PM         133632 ssh-shellhost.exe
-a----        6/15/2017   5:05 PM         856576 ssh.exe
-a----        6/15/2017   5:09 PM         899584 sshd.exe
-a----        4/24/2017   1:37 PM           3520 sshd_config
-a----        11/8/2016  10:59 AM            567 uninstall-sshd.ps1


PS C:\Program Files\OpenSSH-Win64> .\install-sshd.ps1
[SC] SetServiceObjectSecurity SUCCESS
[SC] ChangeServiceConfig SUCCESS
[SC] ChangeServiceConfig2 SUCCESS
sshd and ssh-agent services successfully installed

Well, that's didn't do it. the Azure Agent VM plugin is still not connecting. Checking out the VM again...

PS C:\Program Files\OpenSSH-Win64> net start sshd
The sshd service is starting.
The sshd service could not be started.

A system error has occurred.

System error 1067 has occurred.

The process terminated unexpectedly.

Bug filed https://issues.jenkins-ci.org/browse/JENKINS-49212

Time to try 2016

Since server core is a dead end with the current plugin, go back to the Windows Server 2016 datacenter w/ UI

  • publisher WindowsServer
  • offer MicrosoftWindowsServer
  • sku 2016-Datacenter

It seems to deploy, then start running my custom init script. I ran into some issues downloading Packer with System.Net.WebClient.downloadFile(), so I switched to Start-BitsTransfer which works.

Diagnosing problem starting the job

I'm not 100% sure if persisting $ENV:Path and rebooting is working yet. When an agent is brought up, I hit errors like this:

...
> git rev-parse --verify HEAD # timeout=10
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline

GitHub has been notified of this commit’s build result

java.io.EOFException
	at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2675)
	at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3150)
	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:859)
	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:355)
	at hudson.remoting.ObjectInputStreamEx.<init>(ObjectInputStreamEx.java:48)
	at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:35)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:63)
Caused: java.io.IOException: Unexpected termination of the channel
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:77)
Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to win-agenedd830
		at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1693)
		at hudson.remoting.Request.call(Request.java:192)
		at hudson.remoting.Channel.call(Channel.java:907)
		at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:281)
		at com.sun.proxy.$Proxy252.clean(Unknown Source)
		at org.jenkinsci.plugins.gitclient.RemoteGitImpl.clean(RemoteGitImpl.java:450)
		at hudson.plugins.git.extensions.impl.CleanCheckout.onCheckoutCompleted(CleanCheckout.java:30)
		at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1238)
		at org.jenkinsci.plugins.workflow.steps.scm.SCMStep.checkout(SCMStep.java:113)
		at org.jenkinsci.plugins.workflow.steps.scm.SCMStep$StepExecutionImpl.run(SCMStep.java:85)
		at org.jenkinsci.plugins.workflow.steps.scm.SCMStep$StepExecutionImpl.run(SCMStep.java:75)
		at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1$1.call(AbstractSynchronousNonBlockingStepExecution.java:47)
		at hudson.security.ACL.impersonate(ACL.java:260)
		at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1.run(AbstractSynchronousNonBlockingStepExecution.java:44)
		at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
		at java.util.concurrent.FutureTask.run(FutureTask.java:266)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
		at java.lang.Thread.run(Thread.java:748)
Caused: hudson.remoting.RequestAbortedException
	at hudson.remoting.Request.abort(Request.java:329)
	at hudson.remoting.Channel.terminate(Channel.java:992)
	at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:96)
Finished: FAILURE

Going to Nodes > (name) > Status and clicking launch agent. forgot exact button. Then it gets further:

Checking out Revision 65b26f4b7f2a660f5adb4468a8d7057e7bf697a3 (refs/remotes/origin/hyperv-insider-gen2)
  > git config core.sparsecheckout # timeout=10
 > git checkout -f 65b26f4b7f2a660f5adb4468a8d7057e7bf697a3
 > git branch -a -v --no-abbrev # timeout=10
 > git checkout -b hyperv-insider-gen2 65b26f4b7f2a660f5adb4468a8d7057e7bf697a3
Commit message: "Fixing image selection for insider"
First time build. Skipping changelog.
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (packer build)
[Pipeline] sh
[C:\Users\agentadmin\workspace\hyperv-insider-gen2-jenkins-F2UCPYHYTG47FPKWNE5GR4MDA5HOKEXTTNH2C5UBELPVREGETLOA] Running shell script
+ packer.exe build --only=hyperv-iso windows_server_insider_docker.json
C:/Users/agentadmin/workspace/hyperv-insider-gen2-jenkins-F2UCPYHYTG47FPKWNE5GR4MDA5HOKEXTTNH2C5UBELPVREGETLOA@tmp/durable-8407bda6/script.sh: line 2: packer.exe: command not found
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // withEnv
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline

GitHub has been notified of this commit’s build result

ERROR: script returned exit code 127
Finished: FAILURE

Why is Packer missing?

Why is this failing? I went back to http://127.0.0.1:8080/computer/win-agenf335b0/log and checked the logs.

Start-BitsTransfer won't work over SSH, and Jenkins connects via SSH.

Start-BitsTransfer : The operation being requested was not performed because the user has not 
logged on to the network. The specified service does not exist. (Exception from HRESULT: 
0x800704DD)
At C:\init.ps1:38 char:1
+ Start-BitsTransfer $source -Destination $destination
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Start-BitsTransfer], COMException
    + FullyQualifiedErrorId : System.Runtime.InteropServices.COMException,Microsoft.BackgroundInt 
   elligentTransfer.Management.NewBitsTransferCommand

Tried Invoke-WebRequest, also failing:

Invoke-WebRequest : The request was aborted: Could not create SSL/TLS secure channel.
At C:\init.ps1:39 char:1
+ Invoke-WebRequest -UseBasicParsing $source -OutFile $destination
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invok 
   e-WebRequest], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeW 
   ebRequestCommand
Raw
initscript.ps1
# Download and Install Java
Set-ExecutionPolicy Unrestricted
#Default workspace location
Set-Location C:\
$source = "http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-windows-x64.exe"
$destination = "C:\jdk-8u131-windows-x64.exe"
$client = new-object System.Net.WebClient
$cookie = "oraclelicense=accept-securebackup-cookie"
$client.Headers.Add([System.Net.HttpRequestHeader]::Cookie, $cookie)
$client.downloadFile($source, $destination)
$proc = Start-Process -FilePath $destination -ArgumentList "/s" -Wait -PassThru
$proc.WaitForExit()
[System.Environment]::SetEnvironmentVariable("JAVA_HOME", "c:\Program Files\Java\jdk1.8.0_131", "Machine")
[System.Environment]::SetEnvironmentVariable("PATH", $Env:Path + ";c:\Program Files\Java\jdk1.8.0_131\bin", "Machine")
$Env:Path += ";c:\Program Files\Java\jdk1.8.0_131\bin"
# Install Git
$source = "https://github.com/git-for-windows/git/releases/latest"
$latestRelease = Invoke-WebRequest -UseBasicParsing $source -Headers @{"Accept"="application/json"}
$json = $latestRelease.Content | ConvertFrom-Json
$latestVersion = $json.tag_name
$versionHead = $latestVersion.Substring(1, $latestVersion.IndexOf("windows")-2)
$source = "https://github.com/git-for-windows/git/releases/download/v${versionHead}.windows.1/Git-${versionHead}-64-bit.exe"
$destination = "C:\Git-${versionHead}-64-bit.exe"
$webClient = New-Object System.Net.WebClient
$webClient.DownloadFile($source, $destination)
$proc = Start-Process -FilePath $destination -ArgumentList "/VERYSILENT" -Wait -PassThru
$proc.WaitForExit()
$Env:Path += ";C:\Program Files\Git\cmd;C:\Program Files\Git\usr\bin"
#Disable git credential manager, get more details in https://support.cloudbees.com/hc/en-us/articles/221046888-Build-Hang-or-Fail-with-Git-for-Windows
git config --system --unset credential.helper
# Install Packer
$source = "https://releases.hashicorp.com/packer/1.1.3/packer_1.1.3_windows_amd64.zip"
$destination = "C:\packer.zip"
# For some reason WebClient.DownloadFile() fails with a TLS error
# and Start-BitsTransfer fails if no logged in user (ex: SSH connection)
Invoke-WebRequest -UseBasicParsing $source -OutFile $destination
Set-Location c:\
# The zip contains a directory 'packer' so it will be created
Expand-Archive $destination
$Env:Path += ";C:\packer"
$cachedir = "d:\packer_cache"
mkdir $cachedir
$Env:PACKER_CACHE_DIR = $cachedir
$tmpdir = "d:\packer_tmp"
mkdir $tmpdir
$Env:TMPDIR = $tmpdir
# Persist environment variables
[Environment]::SetEnvironmentVariable("PATH", $Env:PATH, "Machine")
[Environment]::SetEnvironmentVariable("PACKER_CACHE_DIR", $Env:PACKER_CACHE_DIR, "Machine")
[Environment]::SetEnvironmentVariable("TMPDIR", $Env:TMPDIR, "Machine")
# Enable Hyper-V
Install-WindowsFeature Hyper-V -IncludeManagementTools
Restart-Computer -Force
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