Powershell调用命令和IISConfigCollection

Question

I want to get Informations about IIS Application Pools from another Server.

This should be possible with Invoke-Command. But theres a behavior i do not unterstand...

When i execute on the local machine the script block looks like this:

# get the values recorded under Recycle
$ConfigSection = Get-IISConfigSection -SectionPath "system.applicationHost/applicationPools"
$SitesCollection = Get-IISConfigCollection -ConfigElement $ConfigSection
$Site = Get-IISConfigCollectionElement -ConfigCollection $SitesCollection -ConfigAttribute @{"name" = "$AppPool"}
$recycling = Get-IISConfigElement -ConfigElement $Site -ChildElementName "recycling"
$flags = $recycling.Attributes["logEventOnRecycle"].Value

$onRecycle = @{
    'Time'           = [bool]($flags -band 1)     # Specific Time
    'Requests'       = [bool]($flags -band 2)     # Request Limit Exceeded
    'Schedule'       = [bool]($flags -band 4)     # Regular Time Interval
    'Memory'         = [bool]($flags -band 8)     # Virtual Memory Limit Exceeded
    'IsapiUnhealthy' = [bool]($flags -band 16)    # Isapi Reported Unhealthy
    'OnDemand'       = [bool]($flags -band 32)    # Manual Recycle
    'ConfigChange'   = [bool]($flags -band 64)    # Application Pool Configuration Changed
    'PrivateMemory'  = [bool]($flags -band 128)   # Private Memory Limit Exceeded
}

This works, i can use this as "$onRecycle.Time" ...

But no i want to get the Information from a Remote computer.

My first thought was to just wrap the whole thing into a $command variable. Of course it didnt work.. It generates the following errors:

• Cannot validate argument on parameter 'ConfigElement'. The argument is null. Provide a valid value for the argument, and then try running the command again.

• Cannot index into a null array.

Then i thought ill do it step for step. Starting with:

$s = "chvmes01"    
$command1 = { Get-IISConfigSection -SectionPath "system.applicationHost/applicationPools" }
    $ConfigSection = Invoke-Command -ComputerName $s -ScriptBlock $command1

This works and gets the desired information, but already on the next step there are troubles again:

$command2 = { param($ConfigSection)(Get-IISConfigCollection -ConfigElement $ConfigSection) }
$SitesCollection = Invoke-Command -ComputerName $s -ScriptBlock $command2 -ArgumentList $ConfigSection

Here i try to include the Variable $ConfigSection but its giving me the following error back:

Cannot bind parameter 'ConfigElement'. Cannot convert the "Microsoft.Web.Administration.ConfigurationSection" value of type "Deserialized.Microsoft.Web.Administration.ConfigurationSection" to type "Microsoft.Web.Administration.ConfigurationElement".

I thought maybe the reason is that i need Import-Module WebAdministration , but it has no effect. Still the same error.. As already the second step doenst work i cant continue..

Any ideas?

Answer 1

The Get-IISConfigCollection cmdlet gets a ConfigurationCollection object from either a ConfigurationSection or a ConfigurationElement .

It is advisable to not to assign this value to a parameter and pass it in the pipeline to the next cmdlet since Windows PowerShell cannot interpret this object. This is due to the fact that ConfigurationCollection implements IEnumarable and the pipeline processor enumrates each single element when used this way. Instead either pass the whole Get-IISConfigCollection cmdlet in the pipeline or pass it as a parameter.

Example:

$ScriptBlock= { Get-IISConfigSection -SectionPath "system.applicationHost/applicationPools" | Get-IISConfigCollection }
$SitesCollection = Invoke-Command -ComputerName $s -ScriptBlock $ScriptBlock

Answer 2

Suggestion : You can use Enter-PsSession command to enter in Remote Computer and then you can run commands over there.

Enter-PSSession -ComputerName "Remote-Computer-name"

** your Commands like local.

Answer 3

Now i found the solution for my problem, thanks to @Kirill Pashkov who led me in the right direction!

It now looks like this:

$s = "chvmes01"
$AppPool = "DefaultAppPool"       

$command1 = {
param($AppPool)
Get-IISConfigSection -SectionPath "system.applicationHost/applicationPools" |
Get-IISConfigCollection |
Get-IISConfigCollectionElement -ConfigAttribute @{"name" = $AppPool} |
Get-IISConfigElement -ChildElementName "recycling"
}

$recycling = Invoke-Command -ComputerName $s -ScriptBlock $command1 -ArgumentList $AppPool

$flags = Invoke-Command -ComputerName $s -ScriptBlock {param($recycling)$recycling.RawAttributes.logEventOnRecycle} -ArgumentList $recycling

$command2 = {
    param($flags)
    @{
    'Time'           = [bool]($flags -band 1)     # Specific Time
    'Requests'       = [bool]($flags -band 2)     # Request Limit Exceeded
    'Schedule'       = [bool]($flags -band 4)     # Regular Time Interval
    'Memory'         = [bool]($flags -band 8)     # Virtual Memory Limit Exceeded
    'IsapiUnhealthy' = [bool]($flags -band 16)    # Isapi Reported Unhealthy
    'OnDemand'       = [bool]($flags -band 32)    # Manual Recycle
    'ConfigChange'   = [bool]($flags -band 64)    # Application Pool Configuration Changed
    'PrivateMemory'  = [bool]($flags -band 128)   # Private Memory Limit Exceeded
    }
}

$onRecycleLog = Invoke-Command -ComputerName $s -ScriptBlock $command2 -ArgumentList $flags

Finally i got the right output saved in the $onRecycleLog Variable which looks like this:

Thank you Kirill for your support!