Service Fabric managed cluster node type scaling

A virtual machine scale set backs each node type in a Service Fabric managed cluster. To allow managed cluster node types to create large virtual machine scale sets, a property multiplePlacementGroups has been added to node type definition. By default, managed cluster node types set this property to false to keep fault and upgrade domains consistent within a placement group, but this setting limits a node type from scaling beyond 100 VMs. To help decide whether your application can make effective use of large scale sets, see this list of requirements and limitations.

Since the Azure Service Fabric managed cluster resource provider orchestrates scaling and uses managed disks for data, we're able to support large scale sets for both stateful and stateless secondary node types.

Enable large virtual machine scale sets in a Service Fabric managed cluster

To configure a secondary node type as a large scale set, set the multiplePlacementGroups property to true.

• The Service Fabric managed cluster resource apiVersion should be 2021-05-01 or later.

{
  "apiVersion": "[variables('sfApiVersion')]",
  "type": "Microsoft.ServiceFabric/managedclusters/nodetypes",
  "name": "[concat(parameters('clusterName'), '/', parameters('nodeTypeName'))]",
  "location": "[resourcegroup().location]",
  "dependsOn": [
    "[concat('Microsoft.ServiceFabric/managedclusters/', parameters('clusterName'))]"
  ],
  "properties": {
    "multiplePlacementGroups": true,
    "isPrimary": false,
    "vmImagePublisher": "[parameters('vmImagePublisher')]",
    "vmImageOffer": "[parameters('vmImageOffer')]",
    "vmImageSku": "[parameters('vmImageSku')]",
    "vmImageVersion": "[parameters('vmImageVersion')]",
    "vmSize": "[parameters('nodeTypeSize')]",
    "vmInstanceCount": "[parameters('nodeTypeVmInstanceCount')]",
    "dataDiskSizeGB": "[parameters('nodeTypeDataDiskSizeGB')]"
  }
}

Next steps