feat: Add trial_timeout parameter to Katib tune API

- Add optional trial_timeout parameter to tune() function
- Support timeout for both Job and PyTorchJob trial types
- Set active_deadline_seconds on Job spec for Job-based trials
- Set active_deadline_seconds on RunPolicy for PyTorchJob-based trials
- Add comprehensive documentation and usage examples
- Add test cases for both Job and PyTorchJob timeout scenarios
- Maintain backward compatibility with existing code

This feature prevents individual trials from running indefinitely
and consuming cluster resources by allowing users to specify
per-trial timeouts in seconds.

Author: wassimbensalem

sdk/python/v1beta1/kubeflow/katib/api/katib_client.py

@@ -216,6 +216,7 @@ def tune(
         packages_to_install: List[str] = None,
         pip_index_url: str = "https://pypi.org/simple",
         metrics_collector_config: Dict[str, Any] = {"kind": "StdOut"},
+        trial_timeout: Optional[int] = None,
     ):
         """
         Create HyperParameter Tuning Katib Experiment using one of the following
@@ -355,6 +356,11 @@ class name in this argument.
             metrics_collector_config: Specify the config of metrics collector,
                 for example, `metrics_collector_config = {"kind": "Push"}`.
                 Currently, we only support `StdOut` and `Push` metrics collector.
+            trial_timeout: Optional timeout in seconds for each trial. If None, no timeout is
+                applied. For Job-based trials, this sets the activeDeadlineSeconds field.
+                For PyTorchJob-based trials, this sets the activeDeadlineSeconds field on the
+                Master replica. This prevents individual trials from running indefinitely and
+                consuming resources.
 
         Raises:
             ValueError: Function arguments have incorrect type or value.
@@ -511,13 +517,15 @@ class name in this argument.
                     resources_per_trial,
                     training_utils.get_pod_template_spec(containers=[container_spec]),
                     training_utils.get_pod_template_spec(containers=[container_spec]),
+                    trial_timeout,
                 )
             # Otherwise, Trial uses Job for model training.
             else:
                 trial_template = utils.get_trial_template_with_job(
                     retain_trials,
                     trial_parameters,
                     training_utils.get_pod_template_spec(containers=[container_spec]),
+                    trial_timeout,
                 )
 
         # If users choose to use external models and datasets.
@@ -694,6 +702,7 @@ class name in this argument.
                 resources_per_trial,
                 master_pod_template_spec,
                 worker_pod_template_spec,
+                trial_timeout,
             )
 
         # Add parameters to the Katib Experiment.

sdk/python/v1beta1/kubeflow/katib/api/katib_client_test.py

@@ -541,6 +541,34 @@ def create_experiment(
         },
         TEST_RESULT_SUCCESS,
     ),
+    (
+        "valid flow with trial_timeout for Job-based trials",
+        {
+            "name": "tune_test",
+            "objective": lambda x: print(f"a={x}"),
+            "parameters": {"a": katib.search.int(min=10, max=100)},
+            "objective_metric_name": "a",
+            "resources_per_trial": {"gpu": "2"},
+            "trial_timeout": 3600,  # 1 hour timeout
+        },
+        TEST_RESULT_SUCCESS,
+    ),
+    (
+        "valid flow with trial_timeout for PyTorchJob-based trials",
+        {
+            "name": "tune_test",
+            "objective": lambda x: print(f"a={x}"),
+            "parameters": {"a": katib.search.int(min=10, max=100)},
+            "objective_metric_name": "a",
+            "resources_per_trial": types.TrainerResources(
+                num_workers=2,
+                num_procs_per_worker=2,
+                resources_per_worker={"gpu": "2"},
+            ),
+            "trial_timeout": 7200,  # 2 hours timeout
+        },
+        TEST_RESULT_SUCCESS,
+    ),
 ]
 
 
@@ -667,6 +695,33 @@ def test_tune(katib_client, test_name, kwargs, expected_output):
                         KubeflowOrgV1PyTorchJob,
                     )
 
+                elif (
+                    test_name
+                    == "valid flow with trial_timeout for Job-based trials"
+                ):
+                    # Verify trial_timeout is set on Job spec
+                    job_spec = experiment.spec.trial_template.trial_spec.spec
+                    assert job_spec.active_deadline_seconds == 3600
+                    # Verify other Job-specific fields
+                    assert isinstance(experiment.spec.trial_template.trial_spec, V1Job)
+                    args_content = "".join(
+                        experiment.spec.trial_template.trial_spec.spec.template.spec.containers[
+                            0
+                        ].args
+                    )
+                    assert "'a': '${trialParameters.a}'" in args_content
+
+                elif (
+                    test_name
+                    == "valid flow with trial_timeout for PyTorchJob-based trials"
+                ):
+                    # Verify trial_timeout is set on PyTorchJob run_policy
+                    pytorch_spec = experiment.spec.trial_template.trial_spec.spec
+                    assert pytorch_spec.run_policy.active_deadline_seconds == 7200
+                    # Verify PyTorchJob type
+                    trial_spec = experiment.spec.trial_template.trial_spec
+                    assert isinstance(trial_spec, KubeflowOrgV1PyTorchJob)
+
                 elif test_name == "valid flow with external model tuning":
                     # Verify input_params
                     args_content = "".join(

sdk/python/v1beta1/kubeflow/katib/utils/utils.py

@@ -284,6 +284,7 @@ def get_trial_template_with_job(
     retain_trials: bool,
     trial_parameters: List[models.V1beta1TrialParameterSpec],
     pod_template_spec: client.V1PodTemplateSpec,
+    trial_timeout: Optional[int] = None,
 ) -> models.V1beta1TrialTemplate:
     """
     Get Trial template with Job as a Trial's Worker
@@ -296,7 +297,7 @@ def get_trial_template_with_job(
     job = client.V1Job(
         api_version="batch/v1",
         kind="Job",
-        spec=client.V1JobSpec(template=pod_template_spec),
+        spec=client.V1JobSpec(template=pod_template_spec, active_deadline_seconds=trial_timeout),
     )
 
     trial_template = models.V1beta1TrialTemplate(
@@ -314,6 +315,7 @@ def get_trial_template_with_pytorchjob(
     resources_per_trial: types.TrainerResources,
     master_pod_template_spec: models.V1PodTemplateSpec,
     worker_pod_template_spec: models.V1PodTemplateSpec,
+    trial_timeout: Optional[int] = None,
 ) -> models.V1beta1TrialTemplate:
     """
     Get Trial template with PyTorchJob as a Trial's Worker
@@ -324,7 +326,10 @@ def get_trial_template_with_pytorchjob(
         api_version=API_VERSION,
         kind=PYTORCHJOB_KIND,
         spec=training_models.KubeflowOrgV1PyTorchJobSpec(
-            run_policy=training_models.KubeflowOrgV1RunPolicy(clean_pod_policy=None),
+            run_policy=training_models.KubeflowOrgV1RunPolicy(
+                clean_pod_policy=None,
+                active_deadline_seconds=trial_timeout,
+            ),
             nproc_per_node=str(resources_per_trial.num_procs_per_worker),
             pytorch_replica_specs={
                 "Master": training_models.KubeflowOrgV1ReplicaSpec(