feat(sdk)!: Deprecate V2 compatible mode in v1 compiler (#6958)

* Deprecate V2 compatible mode in v1 compiler

* release note

* fix tests

sdk/RELEASE.md

@@ -13,6 +13,7 @@
 
 * Remove sdk/python/kfp/v2/google directory for v2, including google client and custom job [\#6886](https://github.com/kubeflow/pipelines/pull/6886)
 * APIs imported from the v1 namespace are no longer supported by the v2 compiler. [\#6890](https://github.com/kubeflow/pipelines/pull/6890)
+* Deprecate v2 compatible mode in v1 compiler. [\#6958](https://github.com/kubeflow/pipelines/pull/6958)
 
 ### For Pipeline Authors
 

sdk/python/kfp/compiler/compiler.py

@@ -76,8 +76,10 @@ class Compiler(object):
             raise ValueError('V2_ENGINE execution mode is not supported yet.')
 
         if mode == dsl.PipelineExecutionMode.V2_COMPATIBLE:
-            warnings.warn('V2_COMPATIBLE execution mode is at Beta quality.'
-                          ' Some pipeline features may not work as expected.')
+            raise ValueError('V2_COMPATIBLE mode has been deprecated in KFP SDK'
+                             ' 2.0. To use V2_COMPATIBLE mode, install KFP SDK'
+                             ' 1.8.*.')
+
         self._mode = mode
         self._launcher_image = launcher_image
         self._pipeline_name_param: Optional[dsl.PipelineParam] = None
@@ -744,8 +746,7 @@ class Compiler(object):
         for op in pipeline.ops.values():
             if hasattr(op, 'importer_spec'):
                 raise ValueError(
-                    'dsl.importer is not supported with v1 compiler.'
-                )
+                    'dsl.importer is not supported with v1 compiler.')
 
             if self._mode == dsl.PipelineExecutionMode.V2_COMPATIBLE:
                 v2_compat.update_op(

sdk/python/tests/compiler/compiler_tests.py

@@ -434,7 +434,7 @@ class TestCompiler(parameterized.TestCase):
     @parameterized.parameters(
         {
             'mode': 'V2_COMPATIBLE',
-            'is_v2': True
+            'error': True
         },
         {
             'mode': 'V1',
@@ -451,7 +451,7 @@ class TestCompiler(parameterized.TestCase):
         {
             'mode': 'V2_COMPATIBLE',
             'env': 'V1',
-            'is_v2': True
+            'error': True
         },
         {
             'mode': None,
@@ -461,7 +461,7 @@ class TestCompiler(parameterized.TestCase):
         {
             'mode': None,
             'env': 'V2_COMPATIBLE',
-            'is_v2': True
+            'error': True
         },
         {
             'mode': None,
@@ -1466,6 +1466,7 @@ implementation:
             p, group_type="subgraph")
         self.assertEqual(resolved, "{{inputs.parameters.op1-param1}}")
 
+    @unittest.skip('v2 compatible mode is being deprecated in SDK v2.0')
     def test_uri_artifact_passing(self):
         self._test_py_compile_yaml('uri_artifacts', mode='V2_COMPATIBLE')