Change script to workflow

PowerShell Help
1

Hi

I’m quite new to Powershell, learning slowly, but I have something that I need to do quite urgently that is beyond me.

I have a script that is used in an Azure runbook to automatically shutdown/startup VMs. I need it to perform these actions in parallel though, so need it to be a workflow.

However it contains two continues & a break which prevent that from working. I’m hoping someone can help me with changing it so that it can be used as a workflow please.

Script is here:
https://gist.github.com/carlewarl/e6fdd0f36d5da6f0911c85950976db46

Continues are on lines 396 & 403. Break is on 418.

Thanks very much.

2

Maybe it’s unreasonable to ask for help with such a long script. Perhaps if I just copy the section that I need assistance with?

 

How would I change this so that it can be used as a workflow please?

 

Thanks.

  # For each VM, determine
    #  - Is it directly tagged for shutdown or member of a tagged resource group
    #  - Is the current time within the tagged schedule 
    # Then assert its correct power state based on the assigned schedule (if present)
    Write-Output "Processing [$($resourceManagerVMList.Count)] virtual machines found in subscription"
    foreach($vm in $resourceManagerVMList)
    {
        $schedule = $null

        # Check for direct tag or group-inherited tag
        if($vm.ResourceType -eq "Microsoft.Compute/virtualMachines" -and $vm.Tags -and $vm.Tags.Name -contains "AutoShutdownSchedule")
        {
            # VM has direct tag (possible for resource manager deployment model VMs). Prefer this tag schedule.
            $schedule = ($vm.Tags | where Name -eq "AutoShutdownSchedule")["Value"]
            Write-Output "[$($vm.Name)]: Found direct VM schedule tag with value: $schedule"
        }
        elseif($taggedResourceGroupNames -contains $vm.ResourceGroupName)
        {
            # VM belongs to a tagged resource group. Use the group tag
            $parentGroup = $taggedResourceGroups | where ResourceGroupName -eq $vm.ResourceGroupName
            $schedule = ($parentGroup.Tags | where Name -eq "AutoShutdownSchedule")["Value"]
            Write-Output "[$($vm.Name)]: Found parent resource group schedule tag with value: $schedule"
        }
        else
        {
            # No direct or inherited tag. Skip this VM.
            Write-Output "[$($vm.Name)]: Not tagged for shutdown directly or via membership in a tagged resource group. Skipping this VM."
            continue
        }

        # Check that tag value was succesfully obtained
        if($schedule -eq $null)
        {
            Write-Output "[$($vm.Name)]: Failed to get tagged schedule for virtual machine. Skipping this VM."
            continue
        }

        # Parse the ranges in the Tag value. Expects a string of comma-separated time ranges, or a single time range
        $timeRangeList = @($schedule -split "," | foreach {$_.Trim()})
        
        # Check each range against the current time to see if any schedule is matched
        $scheduleMatched = $false
        $matchedSchedule = $null
        foreach($entry in $timeRangeList)
        {
            if((CheckScheduleEntry -TimeRange $entry) -eq $true)
            {
                $scheduleMatched = $true
                $matchedSchedule = $entry
                break
            }
        }
3

I am sorry but the paste of your script in the second post is not legible but as generally with a workflow you wrap it around your code similar to a function.

Workflow Do-Something {
CODE GOES HERE
} #End of workflow

You can then call the workflow with something like:

Do-Something -PSPersist $true

 

This is of course a very brief overview, you could extend the workflow by running certain parts in parallel or creating checkpoints

 

4

Woops sorry about that, I’ve pasted again, hopefully it appears okay now. The problem is that continue & break can’t be used in a workflow. I’m not sure how to change the script to remove the continue & break…

# For each VM, determine
# - Is it directly tagged for shutdown or member of a tagged resource group
# - Is the current time within the tagged schedule 
# Then assert its correct power state based on the assigned schedule (if present)
Write-Output "Processing [$($resourceManagerVMList.Count)] virtual machines found in subscription"
foreach($vm in $resourceManagerVMList)
{
$schedule = $null

# Check for direct tag or group-inherited tag
if($vm.ResourceType -eq "Microsoft.Compute/virtualMachines" -and $vm.Tags -and $vm.Tags.Name -contains "AutoShutdownSchedule")
{
# VM has direct tag (possible for resource manager deployment model VMs). Prefer this tag schedule.
$schedule = ($vm.Tags | where Name -eq "AutoShutdownSchedule")["Value"]
Write-Output "[$($vm.Name)]: Found direct VM schedule tag with value: $schedule"
}
elseif($taggedResourceGroupNames -contains $vm.ResourceGroupName)
{
# VM belongs to a tagged resource group. Use the group tag
$parentGroup = $taggedResourceGroups | where ResourceGroupName -eq $vm.ResourceGroupName
$schedule = ($parentGroup.Tags | where Name -eq "AutoShutdownSchedule")["Value"]
Write-Output "[$($vm.Name)]: Found parent resource group schedule tag with value: $schedule"
}
else
{
# No direct or inherited tag. Skip this VM.
Write-Output "[$($vm.Name)]: Not tagged for shutdown directly or via membership in a tagged resource group. Skipping this VM."
continue
}

# Check that tag value was succesfully obtained
if($schedule -eq $null)
{
Write-Output "[$($vm.Name)]: Failed to get tagged schedule for virtual machine. Skipping this VM."
continue
}

# Parse the ranges in the Tag value. Expects a string of comma-separated time ranges, or a single time range
$timeRangeList = @($schedule -split "," | foreach {$_.Trim()})

# Check each range against the current time to see if any schedule is matched
$scheduleMatched = $false
$matchedSchedule = $null
foreach($entry in $timeRangeList)
{
if((CheckScheduleEntry -TimeRange $entry) -eq $true)
{
$scheduleMatched = $true
$matchedSchedule = $entry
break
}
}