Azure arm output the IPs of an app service - azure

Question

I am using ARM template in azure to get the possibleOutboundIpAddresses from an app service and use the same to create allow firewall rule in mysql server
Below is the parameter I am using to fetch the ips
"parameters": {
"webAppOutboundIpAddresses": {
"value": "[split(reference(concat('Microsoft.Web/sites/',parameters('wpsitename'))).properties.possibleOutboundIpAddresses,',')]"
and below is the piece of code using in the linked template.
"type": "Microsoft.DBforMySQL/servers/firewallRules",
"apiVersion": "2017-12-01",
"name": "[concat(parameters('sqlServerName'), '/Allow WebApp Outbound IP ',copyIndex('webAppOutboundIPAddressesCopy'))]",
"properties": {
"startIpAddress": "[parameters('webAppOutboundIpAddresses')[copyIndex('webAppOutboundIPAddressesCopy')]]",
"endIpAddress": "[parameters('webAppOutboundIpAddresses')[copyIndex('webAppOutboundIPAddressesCopy')]]"
},
"copy": {
"name": "webAppOutboundIPAddressesCopy",
"count": "[length(parameters('webAppOutboundIpAddresses'))]"
But somehow the pipeline is failing and I am getting an invalid parameter error
InvalidParameterValue",
"message": "Invalid value given for parameter '{0}'. Specify a valid parameter value."
One more thing I noticed is the output IPs are showing inside square brackets like ["192.168.1.2"]
Can someone please shed some light on this? Thanks

Answer 1

If the resource is in the same template, you must use the reference() function and pass it the resource id or only the name:
{
"$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"appServiceName": {
"type": "string",
"minLength": 1,
"metadata": {
"description": "Specifies the name of the Azure App Service"
}
},
"appServicePlanName": {
"type": "string",
"minLength": 1
}
},
"variables": {
},
"resources": [
{
"apiVersion": "2015-08-01",
"name": "[parameters('appServiceName')]",
"type": "Microsoft.Web/sites",
"kind": "app",
"location": "[resourceGroup().location]",
"dependsOn": [],
"properties": {
"serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('appServicePlanName'))]",
"clientAffinityEnabled": false
},
"resources": [],
}
],
"outputs": {
"appServiceName": {
"type": "string",
"value": "reference(parameters('appServiceName'), '2016-03-01', 'Full').properties.inboundIpAddress"
},
"ipAddress": {
"type": "string",
"value": "whatingodsnamegoeshere"
}
}
}
OR
With resourced id:
reference(resourceId('Microsoft.Web/serverfarms', parameters('appServicePlanName')), '2016-03-01', 'Full').properties.inboundIpAddress
For the outbound ip addresses: refer here provided by AZToso.
"parameters": {
"webAppOutboundIpAddresses": {
"value": "[split(reference(concat('Microsoft.Web/sites/',variables('webAppName'))).possibleOutboundIpAddresses,',')]"
},
We must develop a loop to iterate through the list of potential outbound IP addresses for a Web App so that we can add each one to the SQL firewall. This is possible with ARM templates by utilizing the copy element. We must utilize the reference function to obtain the WebApp's object. However, the reference function has a restriction that prevents you from using it to change the value of the count property in a copy loop.