enable configuring proxy VM sku (#1128)

docs/webhook_events.md

@@ -644,7 +644,8 @@ Each event will be submitted via HTTP POST to the user provided URL.
         "allow_pool_management": true,
         "allowed_aad_tenants": [
             "00000000-0000-0000-0000-000000000000"
-        ]
+        ],
+        "proxy_vm_sku": "Standard_B2s"
     }
 }
 ```
@@ -676,6 +677,11 @@ Each event will be submitted via HTTP POST to the user provided URL.
                     },
                     "title": "Allowed Aad Tenants",
                     "type": "array"
+                },
+                "proxy_vm_sku": {
+                    "default": "Standard_B2s",
+                    "title": "Proxy Vm Sku",
+                    "type": "string"
                 }
             },
             "required": [
@@ -5621,6 +5627,11 @@ Each event will be submitted via HTTP POST to the user provided URL.
                     },
                     "title": "Allowed Aad Tenants",
                     "type": "array"
+                },
+                "proxy_vm_sku": {
+                    "default": "Standard_B2s",
+                    "title": "Proxy Vm Sku",
+                    "type": "string"
                 }
             },
             "required": [

src/api-service/__app__/onefuzzlib/proxy.py

@@ -36,12 +36,12 @@ from .azure.ip import get_public_ip
 from .azure.queue import get_queue_sas
 from .azure.storage import StorageType
 from .azure.vm import VM
+from .config import InstanceConfig
 from .events import send_event
 from .extension import proxy_manager_extensions
 from .orm import ORMMixin, QueryFilter
 from .proxy_forward import ProxyForward
 
-PROXY_SKU = "Standard_B2s"
 PROXY_IMAGE = "Canonical:UbuntuServer:18.04-LTS:latest"
 PROXY_LOG_PREFIX = "scaleset-proxy: "
 PROXY_LIFESPAN = datetime.timedelta(days=7)
@@ -69,10 +69,11 @@ class Proxy(ORMMixin):
         return ("region", "proxy_id")
 
     def get_vm(self) -> VM:
+        sku = InstanceConfig.fetch().proxy_vm_sku
         vm = VM(
             name="proxy-%s" % base58.b58encode(self.proxy_id.bytes).decode(),
             region=self.region,
-            sku=PROXY_SKU,
+            sku=sku,
             image=PROXY_IMAGE,
             auth=self.auth,
         )

src/pytypes/onefuzztypes/models.py

@@ -802,6 +802,7 @@ class InstanceConfig(BaseModel):
     # if set, only admins can manage pools or scalesets
     allow_pool_management: bool = Field(default=True)
 
+    proxy_vm_sku: str = Field(default="Standard_B2s")
     allowed_aad_tenants: List[UUID]
 
     def update(self, config: "InstanceConfig") -> None: