feature: support passing Env Vars to local mode training

.githooks/pre-push

@@ -12,5 +12,5 @@ start_time=`date +%s`
 tox -e sphinx,doc8 --parallel all
 ./ci-scripts/displaytime.sh 'sphinx,doc8' $start_time
 start_time=`date +%s`
-tox -e py36,py37,py38 --parallel all -- tests/unit
-./ci-scripts/displaytime.sh 'py36,py37,py38 unit' $start_time
+tox -e py36,py37,py38,py39 --parallel all -- tests/unit
+./ci-scripts/displaytime.sh 'py36,py37,py38,py39 unit' $start_time

src/sagemaker/local/entities.py

@@ -175,22 +175,37 @@ def describe(self):
 
 
 class _LocalTrainingJob(object):
-    """Placeholder docstring"""
+    """Defines and starts a local training job."""
 
     _STARTING = "Starting"
     _TRAINING = "Training"
     _COMPLETED = "Completed"
     _states = ["Starting", "Training", "Completed"]
 
     def __init__(self, container):
+        """Creates a local training job.
+
+        Args:
+            container: the local container object.
+        """
         self.container = container
         self.model_artifacts = None
         self.state = "created"
         self.start_time = None
         self.end_time = None
+        self.environment = None
+
+    def start(self, input_data_config, output_data_config, hyperparameters, environment, job_name):
+        """Starts a local training job.
 
-    def start(self, input_data_config, output_data_config, hyperparameters, job_name):
-        """Placeholder docstring."""
+        Args:
+            input_data_config (dict): The Input Data Configuration, this contains data such as the
+                channels to be used for training.
+            output_data_config (dict): The configuration of the output data.
+            hyperparameters (dict): The HyperParameters for the training job.
+            environment (dict): The collection of environment variables passed to the job.
+            job_name (str): Name of the local training job being run.
+        """
         for channel in input_data_config:
             if channel["DataSource"] and "S3DataSource" in channel["DataSource"]:
                 data_distribution = channel["DataSource"]["S3DataSource"]["S3DataDistributionType"]
@@ -216,9 +231,10 @@ def start(self, input_data_config, output_data_config, hyperparameters, job_name
 
         self.start_time = datetime.datetime.now()
         self.state = self._TRAINING
+        self.environment = environment
 
         self.model_artifacts = self.container.train(
-            input_data_config, output_data_config, hyperparameters, job_name
+            input_data_config, output_data_config, hyperparameters, environment, job_name
         )
         self.end_time = datetime.datetime.now()
         self.state = self._COMPLETED

src/sagemaker/local/image.py

@@ -176,14 +176,15 @@ def process(
         # you see this line at the end.
         print("===== Job Complete =====")
 
-    def train(self, input_data_config, output_data_config, hyperparameters, job_name):
+    def train(self, input_data_config, output_data_config, hyperparameters, environment, job_name):
         """Run a training job locally using docker-compose.
 
         Args:
             input_data_config (dict): The Input Data Configuration, this contains data such as the
                 channels to be used for training.
             output_data_config: The configuration of the output data.
             hyperparameters (dict): The HyperParameters for the training job.
+            environment (dict): The environment collection for the training job.
             job_name (str): Name of the local training job being run.
 
         Returns (str): Location of the trained model.
@@ -217,6 +218,7 @@ def train(self, input_data_config, output_data_config, hyperparameters, job_name
             REGION_ENV_NAME: self.sagemaker_session.boto_region_name,
             TRAINING_JOB_NAME_ENV_NAME: job_name,
         }
+        training_env_vars.update(environment)
         if self.sagemaker_session.s3_resource is not None:
             training_env_vars[
                 S3_ENDPOINT_URL_ENV_NAME

src/sagemaker/local/local_session.py

@@ -155,6 +155,7 @@ def create_training_job(
         OutputDataConfig,
         ResourceConfig,
         InputDataConfig=None,
+        Environment=None,
         **kwargs
     ):
         """Create a training job in Local Mode.
@@ -167,6 +168,8 @@ def create_training_job(
           OutputDataConfig(dict): Identifies the location where you want to save the results of
             model training.
           ResourceConfig(dict): Identifies the resources to use for local model training.
+          Environment(dict, optional): Describes the environment variables to pass
+            to the container. (Default value = None)
           HyperParameters(dict) [optional]: Specifies these algorithm-specific parameters to
             influence the quality of the final model.
           **kwargs:
@@ -175,6 +178,7 @@ def create_training_job(
 
         """
         InputDataConfig = InputDataConfig or {}
+        Environment = Environment or {}
         container = _SageMakerContainer(
             ResourceConfig["InstanceType"],
             ResourceConfig["InstanceCount"],
@@ -184,7 +188,9 @@ def create_training_job(
         training_job = _LocalTrainingJob(container)
         hyperparameters = kwargs["HyperParameters"] if "HyperParameters" in kwargs else {}
         logger.info("Starting training job")
-        training_job.start(InputDataConfig, OutputDataConfig, hyperparameters, TrainingJobName)
+        training_job.start(
+            InputDataConfig, OutputDataConfig, hyperparameters, Environment, TrainingJobName
+        )
 
         LocalSagemakerClient._training_jobs[TrainingJobName] = training_job
 

tests/data/mxnet_mnist/check_env.py

@@ -0,0 +1,16 @@
+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+#     http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+# ANY KIND, either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+from __future__ import absolute_import
+import os
+
+
+if __name__ == "__main__":
+    assert os.environ["MYVAR"] == "HELLO_WORLD"

tests/integ/test_local_mode.py

@@ -247,6 +247,28 @@ def test_mxnet_local_data_local_script(
             predictor.delete_endpoint()
 
 
+@pytest.mark.local_mode
+def test_mxnet_local_training_env(mxnet_training_latest_version, mxnet_training_latest_py_version):
+    data_path = os.path.join(DATA_DIR, "mxnet_mnist")
+    script_path = os.path.join(data_path, "check_env.py")
+
+    mx = MXNet(
+        entry_point=script_path,
+        role="SageMakerRole",
+        instance_count=1,
+        instance_type="local",
+        framework_version=mxnet_training_latest_version,
+        py_version=mxnet_training_latest_py_version,
+        sagemaker_session=LocalNoS3Session(),
+        environment={"MYVAR": "HELLO_WORLD"},
+    )
+
+    train_input = "file://" + os.path.join(data_path, "train")
+    test_input = "file://" + os.path.join(data_path, "test")
+
+    mx.fit({"train": train_input, "test": test_input})
+
+
 @pytest.mark.local_mode
 def test_mxnet_training_failure(
     sagemaker_local_session, mxnet_training_latest_version, mxnet_training_latest_py_version, tmpdir

tests/unit/test_image.py

@@ -74,6 +74,8 @@
     "sagemaker_submit_directory": json.dumps("file:///tmp/code"),
 }
 
+ENVIRONMENT = {"MYVAR": "HELLO_WORLD"}
+
 
 @pytest.fixture()
 def sagemaker_session():
@@ -352,7 +354,7 @@ def test_train(
             "local", instance_count, image, sagemaker_session=sagemaker_session
         )
         sagemaker_container.train(
-            INPUT_DATA_CONFIG, OUTPUT_DATA_CONFIG, HYPERPARAMETERS, TRAINING_JOB_NAME
+            INPUT_DATA_CONFIG, OUTPUT_DATA_CONFIG, HYPERPARAMETERS, ENVIRONMENT, TRAINING_JOB_NAME
         )
 
         docker_compose_file = os.path.join(
@@ -415,7 +417,7 @@ def test_train_with_hyperparameters_without_job_name(
             "local", instance_count, image, sagemaker_session=sagemaker_session
         )
         sagemaker_container.train(
-            INPUT_DATA_CONFIG, OUTPUT_DATA_CONFIG, HYPERPARAMETERS, TRAINING_JOB_NAME
+            INPUT_DATA_CONFIG, OUTPUT_DATA_CONFIG, HYPERPARAMETERS, ENVIRONMENT, TRAINING_JOB_NAME
         )
 
         docker_compose_file = os.path.join(
@@ -456,7 +458,11 @@ def test_train_error(
 
         with pytest.raises(RuntimeError) as e:
             sagemaker_container.train(
-                INPUT_DATA_CONFIG, OUTPUT_DATA_CONFIG, HYPERPARAMETERS, TRAINING_JOB_NAME
+                INPUT_DATA_CONFIG,
+                OUTPUT_DATA_CONFIG,
+                HYPERPARAMETERS,
+                ENVIRONMENT,
+                TRAINING_JOB_NAME,
             )
 
         assert "this is expected" in str(e)
@@ -486,7 +492,11 @@ def test_train_local_code(get_data_source_instance, tmpdir, sagemaker_session):
         )
 
         sagemaker_container.train(
-            INPUT_DATA_CONFIG, OUTPUT_DATA_CONFIG, LOCAL_CODE_HYPERPARAMETERS, TRAINING_JOB_NAME
+            INPUT_DATA_CONFIG,
+            OUTPUT_DATA_CONFIG,
+            LOCAL_CODE_HYPERPARAMETERS,
+            ENVIRONMENT,
+            TRAINING_JOB_NAME,
         )
 
         docker_compose_file = os.path.join(
@@ -538,7 +548,7 @@ def test_train_local_intermediate_output(get_data_source_instance, tmpdir, sagem
         hyperparameters = {"sagemaker_s3_output": output_path}
 
         sagemaker_container.train(
-            INPUT_DATA_CONFIG, output_data_config, hyperparameters, TRAINING_JOB_NAME
+            INPUT_DATA_CONFIG, output_data_config, hyperparameters, ENVIRONMENT, TRAINING_JOB_NAME
         )
 
         docker_compose_file = os.path.join(