Use self-hosted runners (#59)

* Use self-hosted runners
* Drop application constraints when running on lxd

.github/workflows/integration_test.yaml

@@ -48,6 +48,8 @@ jobs:
       extra-arguments: ${{needs.extra-args.outputs.args}} -k test_${{ matrix.suite }}
       load-test-enabled: false
       zap-enabled: false
+      self-hosted-runner: true
+      self-hosted-runner-label: "large"
       trivy-fs-enabled: true
       trivy-image-config: "trivy.yaml"
       tmate-debug: true

tests/integration/conftest.py

@@ -174,17 +174,34 @@ def switch(self, name: str, path: Path):
         app["charm"] = str(path.resolve())
         app["channel"] = None
 
+    def drop_constraints(self):
+        """Remove constraints on applications. Useful for testing on lxd."""
+        for app in self.applications.values():
+            app["constraints"] = None
 
-async def cloud_profile(ops_test: OpsTest):
-    """Apply lxd-profile to the model if the juju cloud is lxd.
+
+async def cloud_type(ops_test: OpsTest):
+    """Return current cloud type of the selected controller
 
     Args:
         ops_test (OpsTest): ops_test plugin
+
+    Returns:
+        string describing current type of the underlying cloud
     """
     assert ops_test.model, "Model must be present"
     controller = await ops_test.model.get_controller()
     cloud = await controller.cloud()
-    if cloud.cloud.type_ == "lxd":
+    return cloud.cloud.type_
+
+
+async def cloud_profile(ops_test: OpsTest):
+    """Apply lxd-profile to the model if the juju cloud is lxd.
+
+    Args:
+        ops_test (OpsTest): ops_test plugin
+    """
+    if await cloud_type(ops_test) == "lxd" and ops_test.model:
         lxd = LXDSubstrate("", "")
         profile_name = f"juju-{ops_test.model.name}"
         lxd.remove_profile(profile_name)
@@ -257,6 +274,8 @@ async def kubernetes_cluster(request: pytest.FixtureRequest, ops_test: OpsTest):
         *[charm.resolve(request.config.option.charm_files) for charm in charms]
     )
     bundle = Bundle(ops_test, Path(__file__).parent / "data" / bundle_file)
+    if await cloud_type(ops_test) == "lxd":
+        bundle.drop_constraints()
     for path, charm in zip(charm_files, charms):
         bundle.switch(charm.app_name, path)
     async with deploy_model(request, ops_test, model, bundle, raise_on_blocked) as the_model: