powershelljobs
Powershell start-job in script seemingly does not start a job
So i got the following situation:
i wrote a script that starts jobs (essentialy starts a specific script with parameters) and monitors them according to the current time. When i start the script, everything works fine except that i can't seem to find the jobs.
Full script:
`
#-- Global Variables
Write-Host "Enter Credentials for Network Share"
$cred = Get-Credential
$Source = Read-Host "Enter Source"
$Destination = Read-Host "Enter Destination"
$Sleepduration = Read-Host "Enter Sleepduration of Robocopy"
$runtime_throttled_start = "0600"
$runtime_throttled_end = "1759"
$runtime_unthrottled_start = "1801"
$runtime_unthrottled_end = "2359"
$runtime_unthrottled_start_nextday = "0001"
$runtime_unthrottled_end_nextday = "0558"
$Date = Get-Date -Format "MM-dd-yyyy"
$Logfile = "$PSScriptRoot\Logs\start-copy\start-copy-$Date.log"
$Script_Root = "C:\temp"
$Status = "0"
#-- Functions
function logging ($Value) {
$Script_Output = "$(Get-Date -Format "MM-dd-yyyy HH:mm:ss") - $Value"
Write-Host $Script_Output
Write-Output $Script_Output >> $Logfile
}
function main {
if (! (Test-Path "$PSScriptRoot\Logs\start-copy")) {
Logging "Creating Logging folder..."
New-Item -Path "$PSScriptRoot\Logs" -Name "start-copy" -Type "directory"
}
$i = 1
try {
while ($i -eq 1) {
$Time = get-date -Format "HHmm"
if (($Time -ge $runtime_throttled_start) -and ($Time -le $runtime_throttled_end)) {
if (($Status -eq "not_throttled") -or ($Status -eq 0)) {
Logging "Stopping running jobs..."
Get-Job | Where-Object {$_.Command -match "sync-job"} | Remove-Job -Force
Logging "Starting throttled script..."
Start-Job -Name Robocopy_Throttled -Filepath ".\sync-job.ps1" -ArgumentList "$Source", "$Destination", $Script_Root, $Sleepduration, "0", "$runtime_throttled_start-$runtime_throttled_end", "$cred"
$nextday = $false
}
$Status = "throttled"
Logging "Status: $Status"
}
if ((($Time -ge $runtime_unthrottled_start-1) -and ($Time -le ($runtime_unthrottled_end))) -or (($Time -ge $runtime_unthrottled_start_nextday) -and ($Time -le $runtime_unthrottled_end_nextday))) {
if (($Status -eq "throttled") -or ($Status -eq 0)) {
Logging "Stopping running jobs..."
Get-Job | Where-Object {$_.Command -match "sync-job"} | Remove-Job -Force
Logging "Starting unthrottled script..."
Start-Job -Name Robocopy_Unthrottled -Filepath ".\sync-job.ps1" -ArgumentList "$Source", "$Destination", $Script_Root, $Sleepduration, "3", "$runtime_unthrottled_start-$runtime_unthrottled_end", "$cred"
$nextday = $false
}
$Status = "not_throttled"
Logging "Current status: $Status"
}
if (($Time -eq "0000") -and ($nextday -eq $false)) {
$nextday = $true
Logging "Next day, stopping running jobs once..."
Get-Job | Where-Object {$_.Command -match "sync-job"} | Remove-Job -Force
Logging "Starting next-day unthrottled script...."
Start-Job -Name Robocopy_Unthrottled_nextday -Filepath ".\sync-job.ps1" -ArgumentList "$Source", "$Destination", $Script_Root, $Sleepduration, "3", "$runtime_unthrottled_start_nextday-$runtime_unthrottled_end_nextday", "$cred"
$Status = "not_throttled_nextday"
Logging "Current status: $Status"
}
Logging "Waiting 10 Seconds for the next check"
Start-Sleep 10
Logging "The following Jobs are currently running:
Get-Job | Where-Object {$_.Command -match "sync-job"}
}
}
finally {
Logging "Stopping and removing all jobs..."
Get-Job | Where-Object {$_.Command -match "sync-job"} | Remove-Job -Force
}
}
main
Now if i execute get-job while this script is running, there are no jobs present:
(get-job).count 0
Starting a Job from Powershell (not via script) does work:
Start-Job -Name Robocopy_Throttled -Filepath ".\sync-job.ps1" -ArgumentList "$Source", "$Destination", $Script_Root, $Sleepduration, "0", "$runtime_throttled_start-$runtime_throttled_end", "$cred"
Id Name PSJobTypeName State HasMoreData Location Command
-- ---- ------------- ----- ----------- -------- -------
9 Robocopy_Throt… BackgroundJob Running True localhost <#…
(get-job).count
1
Also (according to the script logs), the script job is running and is transfering data as it should. that's what is confusing me the most. You guys got any idea?
Also if you guys are interested in the script that actually does the job:
param (
$Source,
$Destination,
$Root,
$Sleepduration,
$Mode,
$Runtime,
$Cred
)
#-- Global Variables
$Date = Get-Date -Format "MM-dd-yyyy_HH-mm"
$Time = Get-Date -Format "HH:mm"
Write-Host $Logfile
if ($Time -eq "00:00") {
$Logfile = "$Root\Logs\Log-$Date-unthrottled_nextday.txt"
}
else {
switch ($Mode) {
0 {$Logfile = "$Root\Logs\Log-$Date-throttled.txt"}
3 {$Logfile = "$Root\Logs\Log-$Date-unthrottled.txt"}
}
}
#-- Functions
function logging ($Value) {
$Script_Output = "$(Get-Date -Format "MM-dd-yyyy HH:mm:ss") - $Value"
Write-Host $Script_Output
Write-Output $Script_Output >> $Logfile
}
function sync-folder ($Source, $Destination, $Mode) {
if (!(Get-PSDrive -PSProvider FileSystem).Name -eq "TempMmount") {
$cred = Get-Credential
New-PSDrive -Name "TempMount" -PSProvider "FileSystem" -Credential $Cred -Root $Source
}
switch ($Mode) {
0 {robocopy $Source $Destination /e /z /copy:DAT /dcopy:DA /W:5 /xo /im /IPG:8 /log+:$Logfile /RH:$runtime /tee}
1 {robocopy $Source $Destination /e /z /copy:DAT /dcopy:DA /W:5 /xo /im /IPG:8 /log+:$Logfile /tee}
2 {robocopy $Source $Destination /e /z /copy:DAT /dcopy:DA /W:5 /xo /im /IPG:8 /log+:$Logfile /tee /L}
3 {robocopy $Source $Destination /e /z /copy:DAT /dcopy:DA /W:5 /xo /im /log+:$Logfile /RH:$runtime /tee}
Default {Write-Host "No Mode has been chosen. Exiting script..."; Exit}
}
Remove-PSDrive -Name "TempMount"
}
#-- Main Method
function main {
Write-Host "Source Directory: $Source"
Write-Host "Destination Directory: $Destination"
$Current_User = [System.Security.Principal.WindowsIdentity]::GetCurrent().Name
Logging "User who's executing this script: $Current_User"
#-- Create Log Directory if it does not exist yet
if (! (Test-Path "$Root\Logs")) {
Logging "Creating Log Directory`n"
New-Item -Path $Root -Name "Logs" -Type "Directory"
}
else {
Logging "Log Directory already exists. Proceeding.. `n"
}
$Modes =
"(0) - Normal run (requires runtime)`n",
"(1) - run only once`n",
"(2) - Dry run once`n",
"(3) - run without bandwidth limit (requires runtime)"
Write-Host "`nYou got the following exectuion modes:`n`n $Modes`n"
Write-Host "You have chosen the following Mode: $Mode"
#-- Endless loop for repetetive sync
#-- Sleepduration is set by the Sleepduration variable
$i = 1
while ($i -eq 1) {
Write-Host "===============================================================================`n"
Write-Output "===============================================================================`n" >> $Logfile
try {
Logging "Starting Sync between $Source and $Destination `n"
sync-folder $Source $Destination $Mode
switch ($Mode) {
0 {Logging "Sync complete. Waiting $Sleepduration Seconds for the next Sync`n"; Start-Sleep $Sleepduration}
1 {Logging "Mode = run once, sync complete. Stoping script...`n"; Write-Host "`n===============================================================================`n"; Write-Output "`n===============================================================================`n" >> $Logfile; Exit}
2 {Logging "Mode = Dry run once, test complete. Stopping script..."; Write-Host "`n===============================================================================`n"; Write-Output "`n===============================================================================`n" >> $Logfile; Exit}
3 {Logging "Mode = no throttle, sync complete. Waiting $Sleepduration Seconds for the next Sync`n"; Start-Sleep $Sleepduration}
}
}
catch {
Logging "There was a Problem with the sync. Following Error message may be helpful:`n"
Logging "$_`n"
Write-Host "`n===============================================================================`n"
Write-Output "`n===============================================================================`n" >> $Logfile
}
}
}
main
This is done in Powershell 7
Solution
Open two PS windows at the same time and try this to demonstrate why:
You wont see a job running for your script from another PS session/thread.
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