Deploying Azure function deployment slot via ARM (2023)

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  Hi Amy,

  What does your ARM template look like to create the slot?

  thanks,
  David

  Monday, August 28, 2017 1:53 AM

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  Hi David,

  Here's my ARM template:

  {
  "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
  "appName": {
  "type": "string",
  "metadata": {
  "description": "The value to use for the app name. Used as part of the name for all resources which is suffixed by a unique string."
  }
  },
  "slotName": {
  "type": "string",
  "defaultValue": "development",
  "metadata": {
  "description": "The name of the deplotment slot"
  }
  },
  "storageSKU": {
  "type": "string",
  "allowedValues": [
  "Standard_LRS",
  "Standard_ZRS",
  "Standard_GRS",
  "Standard_RAGRS",
  "Premium_LRS"
  ],
  "defaultValue": "Standard_LRS",
  "metadata": {
  "description": "The type of replication to use for the storage account."
  }
  },
  "FUNCTIONS_EXTENSION_VERSION": {
  "type": "string",
  "metadata": {
  "description": "The version of the Function App runtime to use"
  },
  "defaultValue": "latest",
  "allowedValues": [
  "latest",
  "~1",
  "beta"
  ]
  }
  },
  "variables": {
  "functionAppStorageName": "[tolower(concat(parameters('appName'),'storage'))]",
  "functionAppName": "[parameters('appName')]",
  "hostingPlanName": "[concat(parameters('appName'),'-ServicePlan')]"
  },
  "resources": [
  {
  "name": "[variables('functionAppStorageName')]",
  "type": "Microsoft.Storage/storageAccounts",
  "apiVersion": "2016-12-01",
  "sku": {
  "name": "[parameters('storageSku')]"
  },
  "kind": "Storage",
  "location": "[resourceGroup().location]"
  },
  {
  "type": "Microsoft.Web/serverfarms",
  "kind": "functionapp",
  "name": "[variables('hostingPlanName')]",
  "apiVersion": "2015-08-01",
  "location": "[resourceGroup().location]",
  "sku": {
  "name": "Y1",
  "tier": "Dynamic",
  "size": "Y1",
  "family": "Y",
  "capacity": 0
  },
  "properties": {
  "name": "[variables('hostingPlanName')]"
  },
  "dependsOn": []
  },
  {
  "apiVersion": "2015-08-01",
  "type": "Microsoft.Web/sites",
  "name": "[variables('functionAppName')]",
  "location": "[resourceGroup().location]",
  "kind": "functionapp",
  "dependsOn": [
  "[resourceId('Microsoft.Web/serverfarms', variables('hostingPlanName'))]",
  "[resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName'))]"
  ],
  "properties": {
  "serverFarmId": "[resourceId('Microsoft.Web/serverfarms',variables('hostingPlanName'))]"
  },
  "resources": [
  {
  "name": "slotConfigNames",
  "type": "config",
  "apiVersion": "2015-08-01",
  "dependsOn": [
  "[resourceId('Microsoft.Web/sites', variables('functionAppName'))]"
  ],
  "tags": {
  "displayName": "slotConfigNames"
  },
  "properties": {
  "appSettingNames": [
  "StickySetting"
  ]
  }
  },
  {
  "apiVersion": "2015-08-01",
  "name": "appsettings",
  "type": "config",
  "dependsOn": [
  "[resourceId('Microsoft.Web/sites', variables('functionAppName'))]"
  ],
  "properties": {
  "AzureWebJobsDashboard": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]",
  "AzureWebJobsStorage": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]",
  "FUNCTIONS_EXTENSION_VERSION": "[parameters('FUNCTIONS_EXTENSION_VERSION')]",
  "WEBSITE_CONTENTAZUREFILECONNECTIONSTRING": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]",
  "WEBSITE_CONTENTSHARE": "[concat(toLower(parameters('appName')), 'production')]",
  "WEBSITE_NODE_DEFAULT_VERSION": "6.5.0",
  "StickySetting": "AlwaysWithProductionSlot",
  "AzureWebJobsSecretStorageType": "Blob"
  }
  },
  {
  "apiVersion": "2015-08-01",
  "name": "[parameters('slotName')]",
  "type": "slots",
  "location": "[resourceGroup().location]",
  "dependsOn": [
  "[resourceId('Microsoft.Web/Sites', variables('functionAppName'))]"
  ],
  "properties": {},
  "resources": [
  {
  "apiVersion": "2015-08-01",
  "name": "appsettings",
  "type": "config",
  "dependsOn": [
  "[resourceId('Microsoft.Web/sites', variables('functionAppName'))]",
  "[resourceId('Microsoft.Web/sites/slots', variables('functionAppName'), parameters('slotName'))]"
  ],
  "properties": {
  "AzureWebJobsDashboard": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]",
  "AzureWebJobsStorage": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]",
  "FUNCTIONS_EXTENSION_VERSION": "[parameters('FUNCTIONS_EXTENSION_VERSION')]",
  "WEBSITE_CONTENTAZUREFILECONNECTIONSTRING": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]",
  "WEBSITE_CONTENTSHARE": "[concat(toLower(parameters('appName')), parameters('slotName'))]",
  "WEBSITE_NODE_DEFAULT_VERSION": "6.5.0",
  "StickySetting": "[concat('AlwaysWith',parameters('slotName'),'slot')]",
  "AzureWebJobsSecretStorageType": "Blob"
  }
  }
  ]
  },
  {
  "apiVersion": "2015-08-01",
  "type": "config",
  "name": "web",
  "dependsOn": [
  "[resourceId('Microsoft.Web/sites', variables('functionAppName'))]"
  ],
  "properties": {
  "use32BitWorkerProcess": false
  }
  }
  ]
  }
  ],
  "outputs": {
  "functionAppName": {
  "value": "[variables('functionAppName')]",
  "type": "string"
  }
  }
  }

  Thanks,

  Amy

  Monday, August 28, 2017 2:00 AM

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  Nothing jumps at me, but I will look into it in more depth.

  Monday, August 28, 2017 2:17 AM

  See Also

  DevOps Primer Part 1 – Adding an Azure Web App with a Swap deployment slot – Windows Management ExpertsAzure Deployment Slots: Benefits and How to Use ThemAzure Functions deployment slotsAzure Deployment Slots: how not to make deployment worse

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  Hi Amy,

  I wasn't able to repro this with following steps:

  • Using your unmodified template
  • Deployed it using all defaults (just entered app name)
  • After deployment completes, going to the root of the slot works fine, e.g.https://tmpfuncappslot-development.azurewebsites.net/

  
  Are your steps any different?

  David

  Monday, August 28, 2017 2:22 AM

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  (Video) CI/CD for Azure Functions: Automating Deployment with Bicep and ARM

  Hi David,

  I am deploying my ARM template using powershell. I runNew-AzureRmResourceGroupDeployment -ResourceGroupName some-resource-group-name -TemplateFile azuredeploy.test.json and when prompted, I enter the appName.

  However, I see the following on my slot:https://testfuncappapc-development.azurewebsites.net/

  Thanks,
  Amy

  Monday, August 28, 2017 3:16 AM

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  Hi Amy,

  Here is the error I see in the logs:

  System.IO.DirectoryNotFoundException : Could not find a part of the path 'D:\home\site\wwwroot\host.json'. at System.IO.__Error.WinIOError(Int32 errorCode,String maybeFullPath) at System.IO.FileStream.Init(String path,FileMode mode,FileAccess access,Int32 rights,Boolean useRights,FileShare share,Int32 bufferSize,FileOptions options,SECURITY_ATTRIBUTES secAttrs,String msgPath,Boolean bFromProxy,Boolean useLongPath,Boolean checkHost) at System.IO.FileStream..ctor(String path,FileMode mode,FileAccess access,FileShare share,Int32 bufferSize,FileOptions options,String msgPath,Boolean bFromProxy,Boolean useLongPath,Boolean checkHost) at System.IO.StreamWriter.CreateFile(String path,Boolean append,Boolean checkHost) at System.IO.StreamWriter..ctor(String path,Boolean append,Encoding encoding,Int32 bufferSize,Boolean checkHost) at System.IO.File.InternalWriteAllText(String path,String contents,Encoding encoding,Boolean checkHost) at System.IO.File.WriteAllText(String path,String contents) at Microsoft.Azure.WebJobs.Script.ScriptHost.Initialize() at C:\azure-webjobs-sdk-script\src\WebJobs.Script\Host\ScriptHost.cs : 316 at Microsoft.Azure.WebJobs.Script.ScriptHost.Create(IScriptHostEnvironment environment,IScriptEventManager eventManager,ScriptHostConfiguration scriptConfig,ScriptSettingsManager settingsManager) at C:\azure-webjobs-sdk-script\src\WebJobs.Script\Host\ScriptHost.cs : 937

  This may point to an issue with the file system.

  What happens if you go tohttps://testfuncappapc-development.scm.azurewebsites.net, and then in the Debug Console see if you can go intoD:\home\site\wwwroot.

  Monday, August 28, 2017 3:38 AM

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  Hi David,

  That directory is initially empty. However once I navigate to the scm site, the host.json gets created with the current timestamp.

  I have noticed while I was troubleshooting, once I navigate to scm, the function app starts up.

  Thanks,

  Amy

  Monday, August 28, 2017 4:19 AM

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  (Video) CI/CD to Azure Functions using Azure DevOps + Slot Deployment

  Ah yes, I was able to repro that. The difference is that last time, I had used the Portal first which made various API calls that caused it to get fixed up. But if I directly hit the app root after template deployment, it repros.

  But note that I saw the same thing for the main site, so it is not specific to the slot.

  I'll take a closer look tomorrow at what might be causing this.

  David

  Monday, August 28, 2017 4:59 AM

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  Thanks, David. Much appreciated.

  Monday, August 28, 2017 5:04 AM

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  Hi Amy,

  Though I don't completely understand the behavior, I think it relates to how App Settings are set. There are two ways of doing this:

  1. Using a separate appsettings section as you are doing
  2. As part of the app creation itself. e.g. See sample

  
  The second one is recommended for Function Apps.

  thanks,
  David

  Monday, August 28, 2017 7:43 PM

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  (Video) Creating deployment slots and staging environments

  Hi David,

  I have updated my ARM template setting appsettings via the properties of the app rather than as a separate resource as you suggested. Although I believe this is working for the production slot, I am still seeing the same issue with the staging slot.

  Please see the ARM template below.
  

  {
  "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
  "appName": {
  "type": "string",
  "metadata": {
  "description": "The value to use for the app name. Used as part of the name for all resources which is suffixed by a unique string."
  }
  },
  "slotName": {
  "type": "string",
  "defaultValue": "development",
  "metadata": {
  "description": "The name of the deplotment slot"
  }
  },
  "storageSKU": {
  "type": "string",
  "allowedValues": [
  "Standard_LRS",
  "Standard_ZRS",
  "Standard_GRS",
  "Standard_RAGRS",
  "Premium_LRS"
  ],
  "defaultValue": "Standard_LRS",
  "metadata": {
  "description": "The type of replication to use for the storage account."
  }
  },
  "FUNCTIONS_EXTENSION_VERSION": {
  "type": "string",
  "metadata": {
  "description": "The version of the Function App runtime to use"
  },
  "defaultValue": "latest",
  "allowedValues": [
  "latest",
  "~1",
  "beta"
  ]
  }
  },
  "variables": {
  "functionAppStorageName": "[tolower(concat(parameters('appName'),'storage'))]",
  "functionAppName": "[parameters('appName')]",
  "hostingPlanName": "[concat(parameters('appName'),'-ServicePlan')]"
  },
  "resources": [
  {
  "name": "[variables('functionAppStorageName')]",
  "type": "Microsoft.Storage/storageAccounts",
  "apiVersion": "2016-12-01",
  "sku": {
  "name": "[parameters('storageSku')]"
  },
  "kind": "Storage",
  "location": "[resourceGroup().location]"
  },
  {
  "type": "Microsoft.Web/serverfarms",
  "kind": "functionapp",
  "name": "[variables('hostingPlanName')]",
  "apiVersion": "2015-08-01",
  "location": "[resourceGroup().location]",
  "sku": {
  "name": "Y1",
  "tier": "Dynamic",
  "size": "Y1",
  "family": "Y",
  "capacity": 0
  },
  "properties": {
  "name": "[variables('hostingPlanName')]"
  },
  "dependsOn": []
  },
  {
  "apiVersion": "2015-08-01",
  "type": "Microsoft.Web/sites",
  "name": "[variables('functionAppName')]",
  "location": "[resourceGroup().location]",
  "kind": "functionapp",
  "dependsOn": [
  "[resourceId('Microsoft.Web/serverfarms', variables('hostingPlanName'))]",
  "[resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName'))]"
  ],
  "properties": {
  "serverFarmId": "[resourceId('Microsoft.Web/serverfarms',variables('hostingPlanName'))]",
  "siteConfig": {
  "appSettings": [
  {
  "name": "AzureWebJobsDashboard",
  "value": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]"
  },
  {
  "name": "AzureWebJobsStorage",
  "value": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]"
  },
  {
  "name": "FUNCTIONS_EXTENSION_VERSION",
  "value": "[parameters('FUNCTIONS_EXTENSION_VERSION')]"
  },
  {
  "name": "WEBSITE_CONTENTAZUREFILECONNECTIONSTRING",
  "value": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]"
  },
  {
  "name": "WEBSITE_CONTENTSHARE",
  "value": "[concat(toLower(parameters('appName')), 'production')]"
  },
  {
  "name": "WEBSITE_NODE_DEFAULT_VERSION",
  "value": "6.5.0"
  },
  {
  "name": "StickySetting",
  "value": "AlwaysWithProductionSlot"
  },
  {
  "name": "AzureWebJobsSecretStorageType",
  "value": "Blob"
  }
  ]
  }
  },
  "resources": [
  {
  "name": "slotConfigNames",
  "type": "config",
  "apiVersion": "2015-08-01",
  "dependsOn": [
  "[resourceId('Microsoft.Web/sites', variables('functionAppName'))]"
  ],
  "tags": {
  "displayName": "slotConfigNames"
  },
  "properties": {
  "appSettingNames": [
  "StickySetting"
  ]
  }
  },
  {
  "apiVersion": "2015-08-01",
  "name": "[parameters('slotName')]",
  "type": "slots",
  "location": "[resourceGroup().location]",
  "dependsOn": [
  "[resourceId('Microsoft.Web/Sites', variables('functionAppName'))]"
  ],
  "properties": {
  "siteConfig": {
  "appSettings": [
  {
  "name": "AzureWebJobsDashboard",
  "value": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]"
  },
  {
  "name": "AzureWebJobsStorage",
  "value": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]"
  },
  {
  "name": "FUNCTIONS_EXTENSION_VERSION",
  "value": "[parameters('FUNCTIONS_EXTENSION_VERSION')]"
  },
  {
  "name": "WEBSITE_CONTENTAZUREFILECONNECTIONSTRING",
  "value": "[concat('DefaultEndpointsProtocol=https;AccountName=',variables('functionAppStorageName'),';AccountKey=',listKeys(resourceId('Microsoft.Storage/storageAccounts', variables('functionAppStorageName')), '2015-05-01-preview').key1)]"
  },
  {
  "name": "WEBSITE_CONTENTSHARE",
  "value": "[concat(toLower(parameters('appName')), parameters('slotName'))]"
  },
  {
  "name": "WEBSITE_NODE_DEFAULT_VERSION",
  "value": "6.5.0"
  },
  {
  "name": "StickySetting",
  "value": "[concat('AlwaysWith',parameters('slotName'),'slot')]"
  },
  {
  "name": "AzureWebJobsSecretStorageType",
  "value": "Blob"
  }
  ]
  }
  }
  },
  {
  "apiVersion": "2015-08-01",
  "type": "config",
  "name": "web",
  "dependsOn": [
  "[resourceId('Microsoft.Web/sites', variables('functionAppName'))]"
  ],
  "properties": {
  "use32BitWorkerProcess": false
  }
  }
  ]
  }
  ],
  "outputs": {
  "functionAppName": {
  "value": "[variables('functionAppName')]",
  "type": "string"
  }
  }
  }

  Any thoughts on this?

  Thanks,

  Amy
  

  
  

  • Edited by amypc Monday, August 28, 2017 9:16 PM

  Monday, August 28, 2017 9:13 PM

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  Ok, this is definitely a bug. I have openedhttps://github.com/Azure/azure-webjobs-sdk-script/issues/1838 to track it.

  Thanks for reporting it and providing full templates that made it easy to repro.

  David

  Monday, August 28, 2017 10:56 PM

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  Thanks for verifying and for all your help troubleshooting!

  Monday, August 28, 2017 11:35 PM

  (Video) Azure deployment slots