how to validate New-ssh Session in Powershell - powershell

Question

I have downloaded SSH-Sessions by Joakim Svendsen which uses SSH.NET and installed the PowerShell module in the Jenkins Windows server
In Jenkins, I have the following PowerShell script:
Import-Module SSH-Sessions
$lastExitCode = 0
$devApp1 = "10.0.1.109"
$devApp2 = "10.0.1.110"
Write-Output "Deployment started in $devApp1......"
New-SshSession -ComputerName $devApp1 -Username test -Password test#123
The problem is that the Jenkins job doesn't get failed when the connectivity fails. The Jenkins output is:
Unable to connect to 10.0.1.109: Exception calling "Connect" with "0" argumen
t(s): "No connection could be made because the target machine actively refused
it"
Finished: SUCCESS
How can I fix this issue?

Answer 1

Using this documentation, I would do something like this:
New-SshSession -ComputerName $devApp1 -Username test -Password test#123
if (!$SshSessions.$devApp1.Connected) {
throw "Session to $devApp1 is not connected"
}
Or this:
New-SshSession -ComputerName $devApp1 -Username test -Password test#123
$Session = Get-SshSession -ComputerName $devApp1
if (!$Session.Connected) {
throw "Session to $devApp1 is not connected"
}
Obviously, if you've got multiple connections to $devApp1 this code will not work, but the examples in the doc suggest it won't allow you to do that. For whatever reason New-SshSession doesn't support the -PassThru parameter, nor does it seem to return the session, nor does it allow you to specify a variable for the session. Instead the design uses a global variable: $SshSessions. Not the way I'd design it.
You might want to look into Posh-SSH. I don't remember if that is designed better, but I don't remember this kind of issue. It also uses the SSH.Net library. Alternately, WinSCP has a .Net assembly that is very easy to use from PowerShell.