CODEWITHSUNDEEP
azureazure-web-app-serviceazure-functionsazure-resource-manager
Alex
Alex

Reputation: 18536

Azure Function+ARM: merge app settings with current settings

My deployment is split into two pipelines

  1. deploy infrastructure (run ARM template)
  2. deploy & configure application (upload app, run script)

My ARM template contains an AppSettings array, like this:

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
        // ...
  },
  "variables": {
    "functionAppName": "[parameters('appName')]",
    "storageAccountid": "[concat(resourceGroup().id,'/providers/','Microsoft.Storage/storageAccounts/', parameters('storageAccountName'))]"
  },
  "resources": [
    {
      "apiVersion": "2015-08-01",
      "type": "Microsoft.Web/sites",
      "name": "[variables('functionAppName')]",
      "location": "[parameters('location')]",
      "kind": "functionapp",
      "dependsOn": [],
      "properties": {
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('hostingPlanName'))]",
        "siteConfig": {
          "appSettings": [
            {
              "name": "AzureWebJobsStorage",
              "value": "[concat('DefaultEndpointsProtocol=https;AccountName=', parameters('storageAccountName'), ';AccountKey=', listKeys(variables('storageAccountid'),'2015-05-01-preview').key1)]"
            },
            {
              "name": "WEBSITE_CONTENTAZUREFILECONNECTIONSTRING",
              "value": "[concat('DefaultEndpointsProtocol=https;AccountName=', parameters('storageAccountName'), ';AccountKey=', listKeys(variables('storageAccountid'),'2015-05-01-preview').key1)]"
            },
            {
              "name": "WEBSITE_CONTENTSHARE",
              "value": "[toLower(variables('functionAppName'))]"
            },
            {
              "name": "FUNCTIONS_EXTENSION_VERSION",
              "value": "~2"
            },
            {
              "name": "WEBSITE_NODE_DEFAULT_VERSION",
              "value": "6.5.0"
            },
            {
              "name": "APPINSIGHTS_INSTRUMENTATIONKEY",
              "value": "[reference(resourceId('microsoft.insights/components/', parameters('applicationInsightsName')), '2015-05-01').InstrumentationKey]"
            }
          ]
        }
      }
    }
  ]
}

During the application deployment, I set new app settings, like this:

az functionapp config appsettings set --resource-group $resourceGroupName 
   --name $functionAppName --settings "foo=bar"

Whenever the infrastructure pipeline is run, it completely removes all app settings which were added via script (e.g. foo). Is there a way to tell ARM to "merge" the deployed AppSettings with the settings defined by the template? Ideally, this should also work when deploying the ARM template for the very first time.

My current workaround is to simply remove the AppSettings part of the ARM template completely.

Upvotes: 2

Views: 1405

Answers (1)

4c74356b41
4c74356b41

Reputation: 72171

No, you cannot have merge behaviour. I dont think you can set individual app setting values with arm templates, so you'd need to put those keys you add at deployment time to the arm template, or remove appsettings from the arm template.

Upvotes: 5

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