PTFE-1402 use subnetwork only for gcp runners (#524)

Author: tcarmet

runner_manager/backend/gcloud.py

@@ -92,7 +92,7 @@ def disks(self) -> List[AttachedDisk]:
     @property
     def network_interfaces(self) -> List[NetworkInterface]:
         network_interface: NetworkInterface = NetworkInterface(
-            network=self.instance_config.network,
+            subnetwork=f"projects/{self.config.project_id}/regions/{self.config.region}/subnetworks/{self.instance_config.subnetwork}",
         )
         if self.instance_config.enable_external_ip:
             network_interface.access_configs = [

runner_manager/models/backend.py

@@ -94,6 +94,7 @@ class GCPConfig(BackendConfig):
 
     project_id: str
     zone: str
+    region: str = "europe-west1"
     service_account_email: str = "default"
     google_application_credentials: Optional[str] = None
 
@@ -102,7 +103,7 @@ class GCPInstanceConfig(InstanceConfig):
     image_family: str = "ubuntu-2004-lts"
     image_project: str = "ubuntu-os-cloud"
     machine_type: str = "e2-small"
-    network: str = "global/networks/default"
+    subnetwork: str = "default"
     enable_nested_virtualization: bool = True
     enable_external_ip: bool = True
     spot: bool = False

tests/unit/backend/test_gcp.py

@@ -15,6 +15,7 @@
 def gcp_group(settings, monkeypatch) -> RunnerGroup:
     config = GCPConfig(
         project_id=os.environ.get("CLOUDSDK_CORE_PROJECT", ""),
+        region=os.environ.get("CLOUDSDK_COMPUTE_REGION", ""),
         zone=os.environ.get("CLOUDSDK_COMPUTE_ZONE", ""),
         google_application_credentials=os.environ.get(
             "GOOGLE_APPLICATION_CREDENTIALS", ""
@@ -55,8 +56,9 @@ def gcp_runner(runner: Runner, gcp_group: RunnerGroup) -> Runner:
 
 
 def test_gcp_network_interfaces(gcp_group: RunnerGroup):
-    interfaces = gcp_group.backend.network_interfaces
+    interfaces: List[NetworkInterface] = gcp_group.backend.network_interfaces
     assert len(interfaces) == 1
+    assert "default" in gcp_group.backend.network_interfaces[0].subnetwork
     assert interfaces[0].access_configs[0].name == "External NAT"
     # Test disabling external IP
     gcp_group.backend.instance_config.enable_external_ip = False