Azure - Set WebSocket On from ARM json template - azure

Question

I'm trying to turn WebSockets On for an Azure WebApp from an Azure ARM json template that deploys my whole infrastructure.
Here is an extract with regards to the Azure Web App. It doesn't work, i.e the WebSockets are still Off. I unsuccessfully tried different spelling: webSocketsEnabled or WebSockets.
"resources":[
{
"name": "[variables('MyApp')]",
"type": "Microsoft.Web/sites",
"location": "Brazil South",
"apiVersion": "2016-08-01",
"dependsOn": [
"[resourceId('Microsoft.Web/serverfarms', variables('MyAppPlanBrazil'))]"
],
"tags": {
"[concat('hidden-related:', resourceId('Microsoft.Web/serverfarms', variables('MyAppPlanBrazil')))]": "Resource",
"displayName": "MyAppAppBrazil"
},
"properties": {
"name": "[variables('MyAppPlanBrazil')]",
"serverFarmId": "[resourceId('Microsoft.Web/serverfarms', variables('MyAppPlanBrazil'))]",
"siteConfig": {
"AlwaysOn": true,
"webSocketsEnabled": true,
"connectionStrings": [
{
...
},
{
...
},
]
}
}
]
UPDATE
As suggested in answer below I updated the apiVersion to "2016-08-01" but this still doesn't work.
Also note that while my schema is the one described here, apiVersion is squiggled in VS and it says the authorized value is "2015-08-01" only.
UPDATE2
I tried the solutions below. They work for their authors but not for me. I guess the problem is elsewhere. My infrastructure is already deployed and I try to update it with webSocketsEnabled. Whereas in the solution below I imagine the authors directly create the web app with webSocketsEnabled.
Also, I coupled webSocketsEnabled with alwaysOn whereas the pricing tier of my webapp doesn't allow "AlwaysOn" (as it says in the portal I need to upgrade to use that feature) so I'll try without alwaysOn.
UPDATE3
At the end, the above template worked when I removed AlwaysOn.
Thank you to those who tried to help me.

Answer 1

Set your api version to this: "2016-08-01"
Use
"webSocketsEnabled": true
This is from the Microsoft.Web/sites template reference:
https://learn.microsoft.com/en-us/azure/templates/microsoft.web/sites
The api version you are using (2015-08-01) from:
https://github.com/Azure/azure-resource-manager-schemas/blob/master/schemas/2015-08-01/Microsoft.Web.json
Doesn't have web sockets in it, but the later one:
https://github.com/Azure/azure-resource-manager-schemas/blob/master/schemas/2016-08-01/Microsoft.Web.json
Does have webSocketsEnabled.

Answer 2

Please have a try to use the following code. It works correctly on my side.
Updated: add whole test arm template and you could have a try to use the following code with your service plan name and resource group name
{
"$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"serverFarmName": {
"type": "string",
"defaultValue": "YourPlan"
},
"serverFarmResourceGroup": {
"type": "string",
"defaultValue": "ResourceGroupName"
}},
"variables": {
"ARMtemplateTestName": "[concat('ARMtemplateTest', uniqueString(resourceGroup().id))]"},
"resources": [
{
"name": "[variables('ARMtemplateTestName')]",
"type": "Microsoft.Web/sites",
"location": "southcentralus",
"apiVersion": "2015-08-01",
"dependsOn": [ ],
"tags": {
"[concat('hidden-related:', resourceId(parameters('serverFarmResourceGroup'), 'Microsoft.Web/serverFarms', parameters('serverFarmName')))]": "Resource",
"displayName": "ARMtemplateTest"
},
"properties": {
"name": "[variables('ARMtemplateTestName')]",
"serverFarmId": "[resourceId(parameters('serverFarmResourceGroup'), 'Microsoft.Web/serverFarms', parameters('serverFarmName'))]"
},
"resources": [
{
"name": "web",
"type": "config",
"apiVersion": "2015-08-01",
"dependsOn": [
"[resourceId('Microsoft.Web/sites', variables('ARMtemplateTestName'))]"
],
"tags": {
"displayName": "enableWebSocket"
},
"properties": {
"webSocketsEnabled": true,
"alwaysOn": true
}
},
{
"apiVersion": "2015-08-01",
"name": "connectionstrings",
"type": "config",
"dependsOn": [
"[resourceId('Microsoft.Web/Sites', variables('ARMtemplateTestName'))]"
],
"properties": {
"ConnString1": {
"value": "My custom connection string",
"type": "custom"
},
"ConnString2": {
"value": "My SQL connection string",
"type": "SQLAzure"
}
}
},
{
"name": "appsettings",
"type": "config",
"apiVersion": "2015-08-01",
"dependsOn": [
"[resourceId('Microsoft.Web/sites', variables('ARMtemplateTestName'))]"
],
"tags": {
"displayName": "Appsetting"
},
"properties": {
"key1": "value1",
"key2": "value2"
}
}
]
}],
"outputs": {}
}
Test Result:

Answer 3

All the above solution should work.
My initial snippet worked as well ... as soon as I removed alwaysOn.
Indeed, I was using a free tiers App Service Plan for which alwaysOn is not available. While there was no errors or anything else indicating something wrong, I could not set webSocketEnabled and alwaysOn at the same time in that case.