ARM Template containing config settings for web app

Question

I am encountering strange behavior when deploying an ARM template.

I have the following template: (Note that sasUrl value 'xxx' has a real, working value in my file)

{
  "name": "[variables('webAppServiceName')]",
  "type": "Microsoft.Web/sites",
  "location": "[resourceGroup().location]",
  "apiVersion": "2016-08-01",
  "dependsOn": [
    "[concat('Microsoft.Web/serverfarms/', variables('appServicePlanName'))]"
  ],
  "tags": {
    "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/', variables('appServicePlanName'))]": "Resource",
    "displayName": "[variables('webAppServiceName')]"
  },
  "properties": {
    "name": "[variables('webAppServiceName')]",
    "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', variables('appServicePlanName'))]"
  },
  "resources": [
    {
      "apiVersion": "2014-11-01",
      "name": "appsettings",
      "type": "config",
      "dependsOn": [
        "[concat('Microsoft.Web/sites/', variables('webAppServiceName'))]",
        "[concat('Microsoft.Web/certificates/', variables('certificateName'))]"
      ],
      "tags": {
        "displayName": "WebAppSettings"
      },
      "properties": {
        "WEBSITE_LOAD_CERTIFICATES": "[reference(resourceId('Microsoft.Web/certificates', variables('certificateName')), providers('Microsoft.Web', 'certificates').apiVersions[0]).thumbprint]"
      }
    },
    {
      "apiVersion": "2016-08-01",
      "name": "Microsoft.ApplicationInsights.Profiler.AzureWebApps",
      "type": "siteextensions",
      "dependsOn": [
        "[resourceId('Microsoft.Web/Sites', variables('webAppServiceName'))]"
      ],
      "properties": {}
    },
    {
      "apiVersion": "2015-08-01",
      "name": "logs",
      "type": "config",
      "dependsOn": [
        "[resourceId('Microsoft.Web/Sites', variables('webAppServiceName'))]"
      ],
      "properties": {
        "applicationLogs": {
          "fileSystem": {
            "level": "Off"
          },
          "azureTableStorage": {
            "level": "Off"
          },
          "azureBlobStorage": {
            "level": "[parameters('applicationLogLevel')]",
            "sasUrl": "xxx"
          }
        },
        "httpLogs": {
          "fileSystem": {
            "enabled": false
          },
          "azureBlobStorage": {
            "enabled": true,
            "sasUrl": "xxx"
          }
        },
        "failedRequestsTracing": {
          "enabled": "[parameters('enableFailedRequestTracing')]"
        },
        "detailedErrorMessages": {
          "enabled": "[parameters('enableDetailedErrorMessages')]"
        }
      }
    }
  ]
}

When deploying this template without modifying anything, the config section 'logs' is not deployed correctly +- 1 on 2 times. I have just tested the ARM template again, and the first deployment, the web app had not the correct settings for diagnostics logging. The second time neither, but the third time they were ok. But the fourth time, the settings were not correct anymore. It looks like this part of the template has no consistent behavior.

Am I overseeing something?

Answer 1

I try to create WebApp with the appsetting and logs, it works correctly for me. I created the project using Visual Studio. The following is my detail steps.

1.Create the Azure Resource Project

2.Select the WebApp template

3.Click the deploy file then right click and remove the unnecessary resource

4.Add the Appsetting Resource for the WebApp

5.Add the logs code for the Azure WebApp

{
          "apiVersion": "2015-08-01",
          "name": "logs",
          "type": "config",
          "dependsOn": [
            "[resourceId('Microsoft.Web/Sites', variables('webSiteName'))]"
          ],
          "properties": {
            "applicationLogs": {
              "fileSystem": {
                "level": "Off"
              },
              "azureTableStorage": {
                "level": "Off"
              },
              "azureBlobStorage": {
                "level": "[variables('Level')]",
                "sasUrl": "xxxx"
              }
            },
            "httpLogs": {
              "fileSystem": {
                "enabled": false
              },
              "azureBlobStorage": {
                "enabled": true,
                "sasUrl": "xxxxxx"
              }
            },
            "failedRequestsTracing": {
              "enabled": "[parameters('enableFailedRequestTracing')]"
            },
            "detailedErrorMessages": {
              "enabled": "[parameters('enableDetailedErrorMessages')]"
            }
          }
        }

6.Right click the project and select the deploy

7.Check the result from the Output and Azure portal

The whole arm template:

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "hostingPlanName": {
      "type": "string",
      "minLength": 1
    },
    "enableFailedRequestTracing": {
      "type": "bool"
    },
    "enableDetailedErrorMessages": {
      "type": "bool"
    },
    "skuName": {
      "type": "string",
      "defaultValue": "F1",
      "allowedValues": [
        "F1",
        "D1",
        "B1",
        "B2",
        "B3",
        "S1",
        "S2",
        "S3",
        "P1",
        "P2",
        "P3",
        "P4"
      ],
      "metadata": {
        "description": "Describes plan's pricing tier and capacity. Check details at https://azure.microsoft.com/en-us/pricing/details/app-service/"
      }
    },
    "skuCapacity": {
      "type": "int",
      "defaultValue": 1,
      "minValue": 1,
      "metadata": {
        "description": "Describes plan's instance count"
      }
    }
  },
  "variables": {
    "webSiteName": "[concat('webSite', uniqueString(resourceGroup().id))]",
    "Level": "Error"
  },
  "resources": [
    {
      "apiVersion": "2015-08-01",
      "name": "[parameters('hostingPlanName')]",
      "type": "Microsoft.Web/serverfarms",
      "location": "[resourceGroup().location]",
      "tags": {
        "displayName": "HostingPlan"
      },
      "sku": {
        "name": "[parameters('skuName')]",
        "capacity": "[parameters('skuCapacity')]"
      },
      "properties": {
        "name": "[parameters('hostingPlanName')]"
      }
    },
    {
      "apiVersion": "2015-08-01",
      "name": "[variables('webSiteName')]",
      "type": "Microsoft.Web/sites",
      "location": "[resourceGroup().location]",
      "tags": {
        "[concat('hidden-related:', resourceGroup().id, '/providers/Microsoft.Web/serverfarms/', parameters('hostingPlanName'))]": "Resource",
        "displayName": "Website"
      },
      "dependsOn": [
        "[resourceId('Microsoft.Web/serverfarms/', parameters('hostingPlanName'))]"
      ],
      "properties": {
        "name": "[variables('webSiteName')]",
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms', parameters('hostingPlanName'))]"
      },
      "resources": [
        {
          "name": "appsettings",
          "type": "config",
          "apiVersion": "2015-08-01",
          "dependsOn": [
            "[resourceId('Microsoft.Web/sites', variables('webSiteName'))]"
          ],
          "tags": {
            "displayName": "appsettings"
          },
          "properties": {
            "key1": "value1",
            "key2": "value2"
          }
        },
        {
          "apiVersion": "2015-08-01",
          "name": "logs",
          "type": "config",
          "dependsOn": [
            "[resourceId('Microsoft.Web/Sites', variables('webSiteName'))]"
          ],
          "properties": {
            "applicationLogs": {
              "fileSystem": {
                "level": "Off"
              },
              "azureTableStorage": {
                "level": "Off"
              },
              "azureBlobStorage": {
                "level": "[variables('Level')]",
                "sasUrl": "xxxxx"
              }
            },
            "httpLogs": {
              "fileSystem": {
                "enabled": false
              },
              "azureBlobStorage": {
                "enabled": true,
                "sasUrl": "xxxx"
              }
            },
            "failedRequestsTracing": {
              "enabled": "[parameters('enableFailedRequestTracing')]"
            },
            "detailedErrorMessages": {
              "enabled": "[parameters('enableDetailedErrorMessages')]"
            }
          }
        }
      ]
    }

  ]
 }

Answer 2

I have experienced similar issues. We fixed this using dependsOn rules. You should add dependsOn rules to split the processing of each config section. It seems like otherwise there can occur problems, for instance ...missing settings.

Arm snippet:

{
    "name": "[variables('ExampleAppName')]",
    "type": "Microsoft.Web/sites",
    "location": "[resourceGroup().location]",
    "apiVersion": "2015-08-01",
    "kind": "api",
    "dependsOn": ["[resourceId('Microsoft.Web/serverfarms', variables('applicationPlanName'))]"],
    "tags": {
        "displayName": "Example App"
    },
    "properties": {
        "name": "[variables('ExampleAppName')]",
        "serverFarmId": "[resourceId('Microsoft.Web/serverfarms/', variables('applicationPlanName'))]",
        "clientAffinityEnabled": "false"
    },
    "resources": [{
        "name": "web",
        "type": "config",
        "apiVersion": "2015-08-01",
        "dependsOn": ["[resourceId('Microsoft.Web/sites', variables('ExampleAppName'))]"],
        "tags": {
            "displayName": "webconfig Example App"
        },
        "properties": {
            "alwaysOn": "true"
        }
    },
    {
        "apiVersion": "2015-08-01",
        "name": "appsettings",
        "type": "config",
        "dependsOn": ["[resourceId('Microsoft.Web/sites', variables('ExampleAppName'))]",
        "[resourceId('Microsoft.Web/sites/config', variables('ExampleAppName'), 'web')]"],
        "tags": {
            "displayName": "appsettings Example App"
        },
        "properties": {
            "EXAMPLE1": "[parameters('EXAMPLE1')]",
            "EXAMPLE2": "[parameters('EXAMPLE2')]"
        }
    },
    {
        "name": "logs",
        "type": "config",
        "apiVersion": "2015-08-01",
        "dependsOn": ["[concat('Microsoft.Web/sites/', variables('ExampleAppName'))]",
        "[resourceId('Microsoft.Web/sites/config', variables('ExampleAppName'), 'appsettings')]"],
        "tags": {
            "displayName": "logs Example App"
        },
        "properties": {
            "applicationLogs": {
                "fileSystem": {
                    "level": "Warning"
                }
            },
            "httpLogs": {
                "fileSystem": {
                    "retentionInMb": "35",
                    "enabled": true
                }
            },
            "detailedErrorMessages": {
                "enabled": false
            }
        }
    }]
}

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