Add container_image at the workflow level.

flytekit/core/workflow.py

@@ -50,6 +50,7 @@
     FlyteValidationException,
     FlyteValueException,
 )
+from flytekit.image_spec.image_spec import ImageSpec
 from flytekit.loggers import logger
 from flytekit.models import interface as _interface_models
 from flytekit.models import literals as _literal_models
@@ -192,6 +193,7 @@ def __init__(
         on_failure: Optional[Union[WorkflowBase, Task]] = None,
         docs: Optional[Documentation] = None,
         default_options: Optional[Options] = None,
+        container_image: Optional[ImageSpec] = None,
         **kwargs,
     ):
         self._name = name
@@ -207,6 +209,7 @@ def __init__(
         self._failure_node = None
         self._docs = docs
         self._default_options = default_options
+        self._container_image = container_image
 
         if self._python_interface.docstring:
             if self.docs is None:
@@ -275,6 +278,10 @@ def failure_node(self) -> Optional[Node]:
     def default_options(self) -> Optional[Options]:
         return self._default_options
 
+    @property
+    def container_image(self) -> Optional[ImageSpec]:
+        return self._container_image
+
     def __repr__(self):
         return (
             f"WorkflowBase - {self._name} && "
@@ -715,6 +722,7 @@ def __init__(
         docs: Optional[Documentation] = None,
         pickle_untyped: bool = False,
         default_options: Optional[Options] = None,
+        container_image: Optional[ImageSpec] = None,
     ):
         name, _, _, _ = extract_task_module(workflow_function)
         self._workflow_function = workflow_function
@@ -734,6 +742,7 @@ def __init__(
             on_failure=on_failure,
             docs=docs,
             default_options=default_options,
+            container_image=container_image,
         )
 
         # Set this here so that the lhs call doesn't fail at least. This is only useful in the context of the
@@ -902,6 +911,7 @@ def workflow(
     docs: Optional[Documentation] = ...,
     pickle_untyped: bool = ...,
     default_options: Optional[Options] = ...,
+    container_image: Optional[Union[str, ImageSpec]] = ...,
 ) -> Callable[[Callable[..., FuncOut]], PythonFunctionWorkflow]: ...
 
 
@@ -914,6 +924,7 @@ def workflow(
     docs: Optional[Documentation] = ...,
     pickle_untyped: bool = ...,
     default_options: Optional[Options] = ...,
+    container_image: Optional[Union[str, ImageSpec]] = ...,
 ) -> Union[Callable[P, FuncOut], PythonFunctionWorkflow]: ...
 
 
@@ -925,6 +936,7 @@ def workflow(
     docs: Optional[Documentation] = None,
     pickle_untyped: bool = False,
     default_options: Optional[Options] = None,
+    container_image: Optional[Union[str, ImageSpec]] = None,
 ) -> Union[Callable[P, FuncOut], Callable[[Callable[P, FuncOut]], PythonFunctionWorkflow], PythonFunctionWorkflow]:
     """
     This decorator declares a function to be a Flyte workflow. Workflows are declarative entities that construct a DAG
@@ -960,6 +972,7 @@ def workflow(
          the workflow. This is not recommended for general use.
     :param default_options: Default options for the workflow when creating a default launch plan. Currently only
          the labels and annotations are allowed to be set as defaults.
+    :param container_image: A container image spec to use for the workflow.
     """
 
     def wrapper(fn: Callable[P, FuncOut]) -> PythonFunctionWorkflow:
@@ -976,6 +989,7 @@ def wrapper(fn: Callable[P, FuncOut]) -> PythonFunctionWorkflow:
             docs=docs,
             pickle_untyped=pickle_untyped,
             default_options=default_options,
+            container_image=container_image,
         )
         update_wrapper(workflow_instance, fn)
         return workflow_instance

pydoclint-errors-baseline.txt

@@ -134,7 +134,7 @@ flytekit/core/utils.py
 --------------------
 flytekit/core/workflow.py
     DOC101: Function `workflow`: Docstring contains fewer arguments than in function signature.
-    DOC103: Function `workflow`: Docstring arguments are different from function arguments. (Or could be other formatting issues: https://jsh9.github.io/pydoclint/violation_codes.html#notes-on-doc103 ). Arguments in the function signature but not in the docstring: [_workflow_function: Optional[Callable[P, FuncOut]], default_options: Optional[Options], docs: Optional[Documentation], failure_policy: Optional[WorkflowFailurePolicy], interruptible: bool, on_failure: Optional[Union[WorkflowBase, Task]], pickle_untyped: bool].
+    DOC103: Function `workflow`: Docstring arguments are different from function arguments. (Or could be other formatting issues: https://jsh9.github.io/pydoclint/violation_codes.html#notes-on-doc103 ). Arguments in the function signature but not in the docstring: [_workflow_function: Optional[Callable[P, FuncOut]], container_image: Optional[Union[str, ImageSpec]], default_options: Optional[Options], docs: Optional[Documentation], failure_policy: Optional[WorkflowFailurePolicy], interruptible: bool, on_failure: Optional[Union[WorkflowBase, Task]], pickle_untyped: bool].
     DOC201: Function `workflow` does not have a return section in docstring
     DOC203: Function `workflow` return type(s) in docstring not consistent with the return annotation. Return annotation has 1 type(s); docstring return section has 0 type(s).
     DOC101: Function `reference_workflow`: Docstring contains fewer arguments than in function signature.

tests/flytekit/unit/core/test_workflows.py

@@ -78,6 +78,44 @@ def wf(a: bool = True) -> bool:
     assert wf(a=False) is False
 
 
+def test_container_image_wf():
+    modified_image = Image(name="modified", fqn="test1", tag="tag1")
+    @task
+    def t1(a: int) -> int:
+        a = a + 5
+        return a
+    @workflow(container_image=modified_image)
+    def container_image_wf(a: int) -> int:
+        return t1(a=a)
+
+    x = container_image_wf(a=3)
+    assert x == 8
+    wf_spec = get_serializable(OrderedDict(), serialization_settings, container_image_wf)
+    assert wf_spec.template.container_image == modified_image
+    assert wf_spec.template.nodes[0].task_node.container_image == modified_image
+
+def test_container_image_wf_override_task():
+    modified_image = Image(name="modified", fqn="test1", tag="tag1")
+    @task
+    def t1(a: int) -> int:
+        a = a + 5
+        return a
+
+    @task(container_image=default_img)
+    def t2(a: int) -> int:
+        a = a + 5
+        return a
+    @workflow(container_image=modified_image)
+    def container_image_wf(a: int) -> int:
+        return t1(a=a) + t2(a=a)
+    x = container_image_wf(a=3)
+    assert x == 16
+    wf_spec = get_serializable(OrderedDict(), serialization_settings, container_image_wf)
+    assert wf_spec.template.container_image == modified_image
+    assert wf_spec.template.nodes[0].task_node.container_image == modified_image
+    assert wf_spec.template.nodes[1].task_node.container_image == default_img
+
+
 def test_list_output_wf():
     @task
     def t1(a: int) -> int: