RHOAIENG-30720: Remove GCS FT for Lifecycled RayClusters

Author: kryanbeane

src/codeflare_sdk/ray/rayjobs/config.py

@@ -44,6 +44,8 @@
 
 logger = logging.getLogger(__name__)
 
+MOUNT_PATH = "/home/ray/scripts"
+
 dir = pathlib.Path(__file__).parent.parent.resolve()
 
 # https://docs.ray.io/en/latest/ray-core/scheduling/accelerators.html
@@ -139,20 +141,12 @@ class ManagedClusterConfig:
             A list of V1Volume objects to add to the Cluster
         volume_mounts:
             A list of V1VolumeMount objects to add to the Cluster
-        enable_gcs_ft:
-            A boolean indicating whether to enable GCS fault tolerance.
-        redis_address:
-            The address of the Redis server to use for GCS fault tolerance, required when enable_gcs_ft is True.
-        redis_password_secret:
-            Kubernetes secret reference containing Redis password. ex: {"name": "secret-name", "key": "password-key"}
-        external_storage_namespace:
-            The storage namespace to use for GCS fault tolerance. By default, KubeRay sets it to the UID of RayCluster.
     """
 
     head_cpu_requests: Union[int, str] = 2
     head_cpu_limits: Union[int, str] = 2
-    head_memory_requests: Union[int, str] = 8
-    head_memory_limits: Union[int, str] = 8
+    head_memory_requests: Union[int, str] = 2
+    head_memory_limits: Union[int, str] = 2
     head_accelerators: Dict[str, Union[str, int]] = field(default_factory=dict)
     head_tolerations: Optional[List[V1Toleration]] = None
     worker_cpu_requests: Union[int, str] = 1
@@ -173,35 +167,10 @@ class ManagedClusterConfig:
     annotations: Dict[str, str] = field(default_factory=dict)
     volumes: list[V1Volume] = field(default_factory=list)
     volume_mounts: list[V1VolumeMount] = field(default_factory=list)
-    enable_gcs_ft: bool = False
-    redis_address: Optional[str] = None
-    redis_password_secret: Optional[Dict[str, str]] = None
-    external_storage_namespace: Optional[str] = None
 
     def __post_init__(self):
         self.envs["RAY_USAGE_STATS_ENABLED"] = "0"
 
-        if self.enable_gcs_ft:
-            if not self.redis_address:
-                raise ValueError(
-                    "redis_address must be provided when enable_gcs_ft is True"
-                )
-
-            if self.redis_password_secret and not isinstance(
-                self.redis_password_secret, dict
-            ):
-                raise ValueError(
-                    "redis_password_secret must be a dictionary with 'name' and 'key' fields"
-                )
-
-            if self.redis_password_secret and (
-                "name" not in self.redis_password_secret
-                or "key" not in self.redis_password_secret
-            ):
-                raise ValueError(
-                    "redis_password_secret must contain both 'name' and 'key' fields"
-                )
-
         self._validate_types()
         self._memory_to_string()
         self._validate_gpu_config(self.head_accelerators)
@@ -286,11 +255,6 @@ def build_ray_cluster_spec(self, cluster_name: str) -> Dict[str, Any]:
             "workerGroupSpecs": [self._build_worker_group_spec(cluster_name)],
         }
 
-        # Add GCS fault tolerance if enabled
-        if self.enable_gcs_ft:
-            gcs_ft_options = self._build_gcs_ft_options()
-            ray_cluster_spec["gcsFaultToleranceOptions"] = gcs_ft_options
-
         return ray_cluster_spec
 
     def _build_head_group_spec(self) -> Dict[str, Any]:
@@ -494,31 +458,7 @@ def _build_env_vars(self) -> list:
         """Build environment variables list."""
         return [V1EnvVar(name=key, value=value) for key, value in self.envs.items()]
 
-    def _build_gcs_ft_options(self) -> Dict[str, Any]:
-        """Build GCS fault tolerance options."""
-        gcs_ft_options = {"redisAddress": self.redis_address}
-
-        if (
-            hasattr(self, "external_storage_namespace")
-            and self.external_storage_namespace
-        ):
-            gcs_ft_options["externalStorageNamespace"] = self.external_storage_namespace
-
-        if hasattr(self, "redis_password_secret") and self.redis_password_secret:
-            gcs_ft_options["redisPassword"] = {
-                "valueFrom": {
-                    "secretKeyRef": {
-                        "name": self.redis_password_secret["name"],
-                        "key": self.redis_password_secret["key"],
-                    }
-                }
-            }
-
-        return gcs_ft_options
-
-    def add_script_volumes(
-        self, configmap_name: str, mount_path: str = "/home/ray/scripts"
-    ):
+    def add_script_volumes(self, configmap_name: str, mount_path: str = MOUNT_PATH):
         """
         Add script volume and mount references to cluster configuration.
 
@@ -590,7 +530,7 @@ def build_script_configmap_spec(
         }
 
     def build_script_volume_specs(
-        self, configmap_name: str, mount_path: str = "/home/ray/scripts"
+        self, configmap_name: str, mount_path: str = MOUNT_PATH
     ) -> Tuple[Dict[str, Any], Dict[str, Any]]:
         """
         Build volume and mount specifications for scripts

src/codeflare_sdk/ray/rayjobs/rayjob.py

@@ -41,7 +41,7 @@
 
 logger = logging.getLogger(__name__)
 
-mount_path = "/home/ray/scripts"
+MOUNT_PATH = "/home/ray/scripts"
 
 
 class RayJob:
@@ -354,7 +354,6 @@ def _extract_script_files_from_entrypoint(self) -> Optional[Dict[str, str]]:
             return None
 
         scripts = {}
-        # mount_path = "/home/ray/scripts"
         processed_files = set()  # Avoid infinite loops
 
         # Look for Python file patterns in entrypoint (e.g., "python script.py", "python /path/to/script.py")
@@ -364,14 +363,14 @@ def _extract_script_files_from_entrypoint(self) -> Optional[Dict[str, str]]:
         # Process main scripts from entrypoint files
         for script_path in matches:
             self._process_script_and_imports(
-                script_path, scripts, mount_path, processed_files
+                script_path, scripts, MOUNT_PATH, processed_files
             )
 
         # Update entrypoint paths to use mounted locations
         for script_path in matches:
             if script_path in [os.path.basename(s) for s in processed_files]:
                 old_path = script_path
-                new_path = f"{mount_path}/{os.path.basename(script_path)}"
+                new_path = f"{MOUNT_PATH}/{os.path.basename(script_path)}"
                 self.entrypoint = self.entrypoint.replace(old_path, new_path)
 
         return scripts if scripts else None
@@ -466,7 +465,7 @@ def _handle_script_volumes_for_new_cluster(self, scripts: Dict[str, str]):
 
         # Add volumes to cluster config (config.py handles spec building)
         self._cluster_config.add_script_volumes(
-            configmap_name=configmap_name, mount_path="/home/ray/scripts"
+            configmap_name=configmap_name, mount_path=MOUNT_PATH
         )
 
     def _handle_script_volumes_for_existing_cluster(self, scripts: Dict[str, str]):
@@ -541,8 +540,6 @@ def _update_existing_cluster_for_scripts(
             config_builder: ManagedClusterConfig instance for building specs
         """
 
-        # Get existing RayCluster
-        api_instance = client.CustomObjectsApi(get_api_client())
         try:
             ray_cluster = self._cluster_api.get_ray_cluster(
                 name=self.cluster_name,
@@ -553,7 +550,7 @@ def _update_existing_cluster_for_scripts(
 
         # Build script volume and mount specifications using config.py
         script_volume, script_mount = config_builder.build_script_volume_specs(
-            configmap_name=configmap_name, mount_path="/home/ray/scripts"
+            configmap_name=configmap_name, mount_path=MOUNT_PATH
         )
 
         # Helper function to check for duplicate volumes/mounts

src/codeflare_sdk/ray/rayjobs/test_rayjob.py

@@ -17,7 +17,7 @@
 from unittest.mock import MagicMock, patch
 from codeflare_sdk.common.utils.constants import CUDA_RUNTIME_IMAGE, RAY_VERSION
 
-from codeflare_sdk.ray.rayjobs.rayjob import RayJob
+from codeflare_sdk.ray.rayjobs.rayjob import MOUNT_PATH, RayJob
 from codeflare_sdk.ray.cluster.config import ClusterConfiguration
 from codeflare_sdk.ray.rayjobs.config import ManagedClusterConfig
 
@@ -1007,27 +1007,6 @@ def test_rayjob_user_override_shutdown_behavior(mocker):
     assert rayjob_override_priority.shutdown_after_job_finishes is True
 
 
-def test_build_ray_cluster_spec_with_gcs_ft(mocker):
-    """Test build_ray_cluster_spec with GCS fault tolerance enabled."""
-    from codeflare_sdk.ray.rayjobs.config import ManagedClusterConfig
-
-    # Create a test cluster config with GCS FT enabled
-    cluster_config = ManagedClusterConfig(
-        enable_gcs_ft=True,
-        redis_address="redis://redis-service:6379",
-        external_storage_namespace="storage-ns",
-    )
-
-    # Build the spec using the method on the cluster config
-    spec = cluster_config.build_ray_cluster_spec("test-cluster")
-
-    # Verify GCS fault tolerance options
-    assert "gcsFaultToleranceOptions" in spec
-    gcs_ft = spec["gcsFaultToleranceOptions"]
-    assert gcs_ft["redisAddress"] == "redis://redis-service:6379"
-    assert gcs_ft["externalStorageNamespace"] == "storage-ns"
-
-
 class TestRayVersionValidation:
     """Test Ray version validation in RayJob."""
 
@@ -1210,7 +1189,7 @@ def test_extract_script_files_from_entrypoint_single_script(mocker, tmp_path):
         assert scripts is not None
         assert test_script.name in scripts
         assert scripts[test_script.name] == "print('Hello World!')"
-        assert f"/home/ray/scripts/{test_script.name}" in rayjob.entrypoint
+        assert f"{MOUNT_PATH}/{test_script.name}" in rayjob.entrypoint
     finally:
         os.chdir(original_cwd)
 
@@ -1377,7 +1356,7 @@ def test_add_script_volumes():
     assert volume.config_map.name == "test-scripts"
 
     assert mount.name == "ray-job-scripts"
-    assert mount.mount_path == "/home/ray/scripts"
+    assert mount.mount_path == MOUNT_PATH
 
 
 def test_add_script_volumes_duplicate_prevention():
@@ -1619,7 +1598,7 @@ def test_rayjob_submit_with_scripts_new_cluster(mocker, tmp_path):
         assert len(cluster_config.volume_mounts) == 1
 
         # Verify entrypoint was updated
-        assert "/home/ray/scripts/test.py" in rayjob.entrypoint
+        assert f"{MOUNT_PATH}/test.py" in rayjob.entrypoint
 
     finally:
         os.chdir(original_cwd)
@@ -1645,9 +1624,7 @@ def test_process_script_and_imports_io_error(mocker, tmp_path):
     mocker.patch("builtins.open", side_effect=IOError("Permission denied"))
 
     # Should handle the error gracefully and not crash
-    rayjob._process_script_and_imports(
-        "test.py", scripts, "/home/ray/scripts", processed_files
-    )
+    rayjob._process_script_and_imports("test.py", scripts, MOUNT_PATH, processed_files)
 
     # Should add to processed_files but not to scripts (due to error)
     assert "test.py" in processed_files
@@ -1671,7 +1648,7 @@ def test_process_script_and_imports_container_path_skip(mocker):
 
     # Test script path already in container
     rayjob._process_script_and_imports(
-        "/home/ray/scripts/test.py", scripts, "/home/ray/scripts", processed_files
+        f"{MOUNT_PATH}/test.py", scripts, MOUNT_PATH, processed_files
     )
 
     # Should skip processing
@@ -1695,9 +1672,7 @@ def test_process_script_and_imports_already_processed(mocker, tmp_path):
     processed_files = {"test.py"}  # Already processed
 
     # Should return early without processing
-    rayjob._process_script_and_imports(
-        "test.py", scripts, "/home/ray/scripts", processed_files
-    )
+    rayjob._process_script_and_imports("test.py", scripts, MOUNT_PATH, processed_files)
 
     # Should remain unchanged
     assert len(scripts) == 0