RHOAIENG-27175: add RayCluster name validation

src/codeflare_sdk/ray/cluster/config.py

@@ -19,6 +19,7 @@
 """
 
 import pathlib
+import re
 import warnings
 from dataclasses import dataclass, field, fields
 from typing import Dict, List, Optional, Union, get_args, get_origin
@@ -38,6 +39,20 @@
     "huawei.com/Ascend310": "NPU",
 }
 
+# Kubernetes metadata.name must be a lowercase RFC 1123 subdomain
+_RFC1123_SUBDOMAIN = re.compile(
+    r"^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$"
+)
+
+
+def _validate_cluster_name(name: str):
+    """Raise ValueError if name is not a valid Kubernetes metadata.name (RFC 1123 subdomain)."""
+    if not name or not _RFC1123_SUBDOMAIN.match(name):
+        raise ValueError(
+            "Cluster name must be a valid RFC 1123 subdomain "
+            "(lowercase, numbers, hyphens/dots; start and end with letter or number)."
+        )
+
 
 @dataclass
 class ClusterConfiguration:
@@ -171,6 +186,7 @@ def __post_init__(self):
         self._validate_extended_resource_requests(
             self.worker_extended_resource_requests
         )
+        _validate_cluster_name(self.name)
 
     def _combine_extended_resource_mapping(self):
         if overwritten := set(self.extended_resource_mapping.keys()).intersection(

src/codeflare_sdk/ray/cluster/test_config.py

@@ -201,6 +201,15 @@ def test_ray_usage_stats_enabled(mocker):
     assert env_vars["RAY_USAGE_STATS_ENABLED"] == "1"
 
 
+def test_cluster_name_validation():
+    with pytest.raises(ValueError):
+        ClusterConfiguration(name="TestCluster", namespace="ns")
+    with pytest.raises(ValueError):
+        ClusterConfiguration(name="testcluster-", namespace="ns")
+    with pytest.raises(ValueError):
+        ClusterConfiguration(name="-testcluster", namespace="ns")
+
+
 # Make sure to always keep this function last
 def test_cleanup():
     os.remove(f"{cluster_dir}test-all-params.yaml")

src/codeflare_sdk/ray/rayjobs/test/test_rayjob.py

@@ -18,7 +18,6 @@
 from ray.runtime_env import RuntimeEnv
 
 from codeflare_sdk.ray.rayjobs.rayjob import RayJob
-from codeflare_sdk.ray.cluster.config import ClusterConfiguration
 from codeflare_sdk.ray.rayjobs.config import ManagedClusterConfig
 from kubernetes.client import V1Volume, V1VolumeMount, V1Toleration
 
@@ -80,7 +79,7 @@ def test_rayjob_init_validation_both_provided(auto_mock_setup):
     """
     Test that providing both cluster_name and cluster_config raises error.
     """
-    cluster_config = ClusterConfiguration(name="test-cluster", namespace="test")
+    cluster_config = ManagedClusterConfig()
 
     with pytest.raises(
         ValueError,
@@ -145,9 +144,7 @@ def test_rayjob_init_with_cluster_config(auto_mock_setup):
     """
     Test RayJob initialization with cluster configuration for auto-creation.
     """
-    cluster_config = ClusterConfiguration(
-        name="auto-cluster", namespace="test-namespace", num_workers=2
-    )
+    cluster_config = ManagedClusterConfig(num_workers=2)
 
     rayjob = RayJob(
         job_name="test-job",
@@ -166,9 +163,7 @@ def test_rayjob_cluster_name_generation(auto_mock_setup):
     """
     Test that cluster names are generated when config has empty name.
     """
-    cluster_config = ClusterConfiguration(
-        name="",  # Empty name should trigger generation
-        namespace="test-namespace",
+    cluster_config = ManagedClusterConfig(
         num_workers=1,
     )
 
@@ -186,9 +181,7 @@ def test_rayjob_cluster_config_namespace_none(auto_mock_setup):
     """
     Test that cluster config namespace is set when None.
     """
-    cluster_config = ClusterConfiguration(
-        name="test-cluster",
-        namespace=None,  # This should be set to job namespace
+    cluster_config = ManagedClusterConfig(
         num_workers=1,
     )