4

I'm trying to automate the creation of a server farm in PowerShell. Through manual creation I've got the following XML:

<webFarms>
    <webFarm name="alwaysup" enabled="true">
        <server address="alwaysup-blue" enabled="true">
            <applicationRequestRouting httpPort="8001" />
        </server>
        <server address="alwaysup-green" enabled="true">
            <applicationRequestRouting httpPort="8002" />
        </server>
        <applicationRequestRouting>
            <healthCheck url="http://alwaysup/up.html" interval="00:00:05" responseMatch="up" />
        </applicationRequestRouting>
    </webFarm>
    <applicationRequestRouting>
        <hostAffinityProviderList>
            <add name="Microsoft.Web.Arr.HostNameRoundRobin" />
        </hostAffinityProviderList>
    </applicationRequestRouting>
</webFarms>

Trying to do this via PS proves troublesome however: as far as I can tell there is no dedicated API to do this through (WebFarmSnapin is meant for an older version).

I have shifted my attention to IIS Administration Cmdlets but only got it half working.

The code that I have:

#####
# Overwriting the server farm
#####

Write-Host "Overwriting the server farm $($webFarmName)"

$webFarm = @{};
$webFarm["name"] = 'siteFarm'

Set-WebConfiguration "/webFarms" -Value $webFarm

#####
# Adding the servers
#####

Write-Host "Adding the servers"

$blueServer = @{}
$blueServer["address"] = 'site-blue'
$blueServer["applicationRequestRouting"] = @{}

$greenServer = @{}
$greenServer["address"] = 'site-green'
$greenServer["applicationRequestRouting"] = @{}

$servers = @($blueServer, $greenServer)

Add-WebConfiguration -Filter "/webFarms/webFarm[@name='siteFarm']" -Value $servers

#####
# Adding routing
#####

Write-Host "Adding the routing configurations"

$blueServerRouting = @{}
$blueServerRouting["httpPort"] = "8001"
Add-WebConfiguration -Filter "/webFarms/webFarm[@name='siteFarm']/server[@address='site-blue']" -Value $blueServerRouting

This generates

<webFarms>
    <webFarm name="siteFarm">
        <server address="site-blue" />
        <server address="site-green" />
    </webFarm>
    <applicationRequestRouting>
        <hostAffinityProviderList>
            <add name="Microsoft.Web.Arr.HostNameRoundRobin" />
        </hostAffinityProviderList>
    </applicationRequestRouting>
</webFarms>

As you can see it's missing the port related to the routing. And I haven't even started with trying to add the healthcheck at this point.

What am I doing wrong? Is there some Cmdlet that I haven't found which makes this easier?

Related but without much of a useful answer (the PowerShell tab with generated code stays empty).

Crossposted it here from SO after realizing SF exists and might be more appropriate.

Jeroen Vannevel
  • 49

1 Answers1

2

The best way I've seen to accomplish this is by mixing powershell with the appcmd.exe command. Microsoft has released some sample code for setting up a farm in a docker container here.

Here's an example: 

ForEach($farm in $farms)
{   
    # Create the farm
    .\appcmd.exe set config  -section:webFarms /+"[name='$($farm.name)']" /commit:apphost

    ForEach($server in $farm.Servers)
    {
        # Add server to farm
        .\appcmd.exe set config  -section:webFarms /+"[name='$($farm.name)'].[address='$($server.address)']" /commit:apphost
    }

    # URL Rewrite
    .\appcmd.exe set config  -section:system.webServer/rewrite/globalRules /+"[name='ARR_$($farm.name)_lb', patternSyntax='Wildcard',stopProcessing='True']" /commit:apphost
    .\appcmd.exe set config  -section:system.webServer/rewrite/globalRules /"[name='ARR_$($farm.name)_lb',patternSyntax='Wildcard',stopProcessing='True']".match.url:"*"  /commit:apphost
    .\appcmd.exe set config  -section:system.webServer/rewrite/globalRules /"[name='ARR_$($farm.name)_lb',patternSyntax='Wildcard',stopProcessing='True']".action.type:"Rewrite"  /"[name='ARR_$($farm.name)_lb',patternSyntax='Wildcard',stopProcessing='True']".action.url:"http://$($farm.name)/{R:0}"  /commit:apphost
}
Corey McClelland
  • 21