feature: SDK Defaults - S3 Params for Session

src/sagemaker/amazon/amazon_estimator.py

@@ -20,7 +20,7 @@
 
 from six.moves.urllib.parse import urlparse
 
-from sagemaker import image_uris
+from sagemaker import image_uris, s3_utils
 from sagemaker.amazon import validation
 from sagemaker.amazon.hyperparameter import Hyperparameter as hp  # noqa
 from sagemaker.amazon.common import write_numpy_to_dense_tensor
@@ -93,8 +93,15 @@ def __init__(
             enable_network_isolation=enable_network_isolation,
             **kwargs
         )
-        data_location = data_location or "s3://{}/sagemaker-record-sets/".format(
-            self.sagemaker_session.default_bucket()
+
+        data_location = data_location or (
+            s3_utils.s3_path_join(
+                "s3://",
+                self.sagemaker_session.default_bucket(),
+                self.sagemaker_session.default_bucket_prefix,
+                "sagemaker-record-sets",
+                with_end_slash=True,
+            )
         )
         self._data_location = data_location
 

src/sagemaker/automl/automl.py

@@ -17,7 +17,7 @@
 from typing import Optional, List, Dict
 from six import string_types
 
-from sagemaker import Model, PipelineModel
+from sagemaker import Model, PipelineModel, s3
 from sagemaker.automl.candidate_estimator import CandidateEstimator
 from sagemaker.config import (
     AUTO_ML_ROLE_ARN_PATH,
@@ -676,7 +676,12 @@ def _prepare_for_auto_ml_job(self, job_name=None):
             self.current_job_name = name_from_base(base_name, max_length=32)
 
         if self.output_path is None:
-            self.output_path = "s3://{}/".format(self.sagemaker_session.default_bucket())
+            self.output_path = s3.s3_path_join(
+                "s3://",
+                self.sagemaker_session.default_bucket(),
+                self.sagemaker_session.default_bucket_prefix,
+                with_end_slash=True,
+            )
 
     @classmethod
     def _get_supported_inference_keys(cls, container, default=None):

src/sagemaker/config/__init__.py

@@ -93,6 +93,8 @@
     AUTO_ML_VOLUME_KMS_KEY_ID_PATH,
     AUTO_ML_INTER_CONTAINER_ENCRYPTION_PATH,
     ENDPOINT_CONFIG_DATA_CAPTURE_KMS_KEY_ID_PATH,
+    SESSION_DEFAULT_S3_BUCKET_PATH,
+    SESSION_DEFAULT_S3_OBJECT_KEY_PREFIX_PATH,
     MONITORING_SCHEDULE_CONFIG,
     MONITORING_JOB_DEFINITION,
     MONITORING_OUTPUT_CONFIG,
@@ -131,4 +133,9 @@
     EXECUTION_ROLE_ARN,
     ASYNC_INFERENCE_CONFIG,
     SCHEMA_VERSION,
+    PYTHON_SDK,
+    MODULES,
+    DEFAULT_S3_BUCKET,
+    DEFAULT_S3_OBJECT_KEY_PREFIX,
+    SESSION,
 )

src/sagemaker/config/config_schema.py

@@ -89,13 +89,17 @@
 OBJECT = "object"
 ADDITIONAL_PROPERTIES = "additionalProperties"
 ENABLE_INTER_CONTAINER_TRAFFIC_ENCRYPTION = "EnableInterContainerTrafficEncryption"
+SESSION = "Session"
+DEFAULT_S3_BUCKET = "DefaultS3Bucket"
+DEFAULT_S3_OBJECT_KEY_PREFIX = "DefaultS3ObjectKeyPrefix"
 
 
 def _simple_path(*args: str):
     """Appends an arbitrary number of strings to use as path constants"""
     return ".".join(args)
 
 
+# Paths for reference elsewhere in the code.
 COMPILATION_JOB_VPC_CONFIG_PATH = _simple_path(SAGEMAKER, COMPILATION_JOB, VPC_CONFIG)
 COMPILATION_JOB_KMS_KEY_ID_PATH = _simple_path(
     SAGEMAKER, COMPILATION_JOB, OUTPUT_CONFIG, KMS_KEY_ID
@@ -231,7 +235,6 @@ def _simple_path(*args: str):
 MODEL_PACKAGE_VALIDATION_PROFILES_PATH = _simple_path(
     SAGEMAKER, MODEL_PACKAGE, VALIDATION_SPECIFICATION, VALIDATION_PROFILES
 )
-
 REMOTE_FUNCTION_DEPENDENCIES = _simple_path(
     SAGEMAKER, PYTHON_SDK, MODULES, REMOTE_FUNCTION, DEPENDENCIES
 )
@@ -274,9 +277,6 @@ def _simple_path(*args: str):
 REMOTE_FUNCTION_ENABLE_INTER_CONTAINER_TRAFFIC_ENCRYPTION = _simple_path(
     SAGEMAKER, PYTHON_SDK, MODULES, REMOTE_FUNCTION, ENABLE_INTER_CONTAINER_TRAFFIC_ENCRYPTION
 )
-
-# Paths for reference elsewhere in the SDK.
-# Names include the schema version since the paths could change with other schema versions
 MONITORING_SCHEDULE_INTER_CONTAINER_ENCRYPTION_PATH = _simple_path(
     SAGEMAKER,
     MONITORING_SCHEDULE,
@@ -298,6 +298,13 @@ def _simple_path(*args: str):
 TRAINING_JOB_INTER_CONTAINER_ENCRYPTION_PATH = _simple_path(
     SAGEMAKER, TRAINING_JOB, ENABLE_INTER_CONTAINER_TRAFFIC_ENCRYPTION
 )
+SESSION_DEFAULT_S3_BUCKET_PATH = _simple_path(
+    SAGEMAKER, PYTHON_SDK, MODULES, SESSION, DEFAULT_S3_BUCKET
+)
+SESSION_DEFAULT_S3_OBJECT_KEY_PREFIX_PATH = _simple_path(
+    SAGEMAKER, PYTHON_SDK, MODULES, SESSION, DEFAULT_S3_OBJECT_KEY_PREFIX
+)
+
 
 SAGEMAKER_PYTHON_SDK_CONFIG_SCHEMA = {
     "$schema": "https://json-schema.org/draft/2020-12/schema",
@@ -447,6 +454,15 @@ def _simple_path(*args: str):
         "s3Uri": {TYPE: "string", "pattern": "^(https|s3)://([^/]+)/?(.*)$", "maxLength": 1024},
         # Regex is taken from https://docs.aws.amazon.com/sagemaker/latest/APIReference/API_AlgorithmSpecification.html#sagemaker-Type-AlgorithmSpecification-ContainerEntrypoint
         "preExecutionCommand": {TYPE: "string", "pattern": r".*"},
+        # Regex based on https://docs.aws.amazon.com/sagemaker/latest/APIReference/API_PipelineDefinitionS3Location.html
+        # except with an additional ^ and $ for the beginning and the end to closer align to
+        # https://docs.aws.amazon.com/AmazonS3/latest/userguide/bucketnamingrules.html
+        "s3Bucket": {
+            TYPE: "string",
+            "pattern": r"^[a-z0-9][\.\-a-z0-9]{1,61}[a-z0-9]$",
+            "minLength": 3,
+            "maxLength": 63,
+        },
     },
     PROPERTIES: {
         SCHEMA_VERSION: {
@@ -477,6 +493,29 @@ def _simple_path(*args: str):
                             TYPE: OBJECT,
                             ADDITIONAL_PROPERTIES: False,
                             PROPERTIES: {
+                                SESSION: {
+                                    TYPE: OBJECT,
+                                    ADDITIONAL_PROPERTIES: False,
+                                    PROPERTIES: {
+                                        DEFAULT_S3_BUCKET: {
+                                            "description": "sets `default_bucket` of Session",
+                                            "$ref": "#/definitions/s3Bucket",
+                                        },
+                                        DEFAULT_S3_OBJECT_KEY_PREFIX: {
+                                            "description": (
+                                                "sets `default_bucket_prefix` of Session"
+                                            ),
+                                            TYPE: "string",
+                                            # S3 guidelines:
+                                            # https://docs.aws.amazon.com/AmazonS3/latest/userguide/object-keys.html
+                                            # Note that the PythonSDK at the time of writing
+                                            # tends to collapse multiple "/" in a row to one "/"
+                                            # (even though S3 allows multiple "/" in a row)
+                                            "minLength": 1,
+                                            "maxLength": 1024,
+                                        },
+                                    },
+                                },
                                 REMOTE_FUNCTION: {
                                     TYPE: OBJECT,
                                     ADDITIONAL_PROPERTIES: False,
@@ -504,9 +543,9 @@ def _simple_path(*args: str):
                                         VOLUME_KMS_KEY_ID: {"$ref": "#/definitions/kmsKeyId"},
                                         VPC_CONFIG: {"$ref": "#/definitions/vpcConfig"},
                                     },
-                                }
+                                },
                             },
-                        }
+                        },
                     },
                 },
                 # Feature Group

src/sagemaker/djl_inference/model.py

@@ -27,6 +27,7 @@
 from sagemaker.deserializers import JSONDeserializer, BaseDeserializer
 from sagemaker.djl_inference import defaults
 from sagemaker.model import FrameworkModel
+from sagemaker.s3_utils import s3_path_join
 from sagemaker.serializers import JSONSerializer, BaseSerializer
 from sagemaker.session import Session
 from sagemaker.utils import _tmpdir, _create_or_update_code_dir
@@ -502,12 +503,16 @@ def partition(
             self.key_prefix, self.name, self.image_uri
         )
         if s3_output_uri is None:
-            bucket = self.bucket or self.sagemaker_session.default_bucket()
-            s3_output_uri = f"s3://{bucket}/{deploy_key_prefix}"
+            bucket, deploy_key_prefix = s3.determine_bucket_and_prefix(
+                bucket=self.bucket,
+                key_prefix=deploy_key_prefix,
+                sagemaker_session=self.sagemaker_session,
+            )
+            s3_output_uri = s3_path_join("s3://", bucket, deploy_key_prefix)
         else:
-            s3_output_uri = f"{s3_output_uri}/{deploy_key_prefix}"
+            s3_output_uri = s3_path_join(s3_output_uri, deploy_key_prefix)
 
-        self.save_mp_checkpoint_path = f"{s3_output_uri}/aot-partitioned-checkpoints"
+        self.save_mp_checkpoint_path = s3_path_join(s3_output_uri, "aot-partitioned-checkpoints")
 
         container_def = self._upload_model_to_s3(upload_as_tar=False)
         estimator = _create_estimator(
@@ -673,7 +678,11 @@ def _upload_model_to_s3(self, upload_as_tar: bool = True):
             deploy_key_prefix = fw_utils.model_code_key_prefix(
                 self.key_prefix, self.name, self.image_uri
             )
-            bucket = self.bucket or self.sagemaker_session.default_bucket()
+            bucket, deploy_key_prefix = s3.determine_bucket_and_prefix(
+                bucket=self.bucket,
+                key_prefix=deploy_key_prefix,
+                sagemaker_session=self.sagemaker_session,
+            )
             if upload_as_tar:
                 uploaded_code = fw_utils.tar_and_upload_dir(
                     self.sagemaker_session.boto_session,
@@ -686,10 +695,9 @@ def _upload_model_to_s3(self, upload_as_tar: bool = True):
                 )
                 model_data_url = uploaded_code.s3_prefix
             else:
-                key_prefix = f"{deploy_key_prefix}/aot-model"
                 model_data_url = S3Uploader.upload(
                     tmp_code_dir,
-                    "s3://%s/%s" % (bucket, key_prefix),
+                    s3_path_join("s3://", bucket, deploy_key_prefix, "aot-model"),
                     self.model_kms_key,
                     self.sagemaker_session,
                 )

src/sagemaker/estimator.py

@@ -27,7 +27,7 @@
 from six.moves.urllib.parse import urlparse
 
 import sagemaker
-from sagemaker import git_utils, image_uris, vpc_utils
+from sagemaker import git_utils, image_uris, vpc_utils, s3
 from sagemaker.analytics import TrainingJobAnalytics
 from sagemaker.config import (
     TRAINING_JOB_VOLUME_KMS_KEY_ID_PATH,
@@ -672,6 +672,9 @@ def __init__(
             enable_network_isolation=self._enable_network_isolation,
         )
 
+        # Internal flag
+        self._is_output_path_set_from_default_bucket_and_prefix = False
+
     @abstractmethod
     def training_image_uri(self):
         """Return the Docker image to use for training.
@@ -772,7 +775,13 @@ def _prepare_for_training(self, job_name=None):
             if self.sagemaker_session.local_mode and local_code:
                 self.output_path = ""
             else:
-                self.output_path = "s3://{}/".format(self.sagemaker_session.default_bucket())
+                self.output_path = s3.s3_path_join(
+                    "s3://",
+                    self.sagemaker_session.default_bucket(),
+                    self.sagemaker_session.default_bucket_prefix,
+                    with_end_slash=True,
+                )
+                self._is_output_path_set_from_default_bucket_and_prefix = True
 
         if self.git_config:
             updated_paths = git_utils.git_clone_repo(
@@ -847,7 +856,8 @@ def _stage_user_code_in_s3(self) -> UploadedCode:
         if is_pipeline_variable(self.output_path):
             if self.code_location is None:
                 code_bucket = self.sagemaker_session.default_bucket()
-                code_s3_prefix = self._assign_s3_prefix()
+                key_prefix = self.sagemaker_session.default_bucket_prefix
+                code_s3_prefix = self._assign_s3_prefix(key_prefix)
                 kms_key = None
             else:
                 code_bucket, key_prefix = parse_s3_url(self.code_location)
@@ -860,16 +870,30 @@ def _stage_user_code_in_s3(self) -> UploadedCode:
             if local_mode:
                 if self.code_location is None:
                     code_bucket = self.sagemaker_session.default_bucket()
-                    code_s3_prefix = self._assign_s3_prefix()
+                    key_prefix = self.sagemaker_session.default_bucket_prefix
+                    code_s3_prefix = self._assign_s3_prefix(key_prefix)
                     kms_key = None
                 else:
                     code_bucket, key_prefix = parse_s3_url(self.code_location)
                     code_s3_prefix = self._assign_s3_prefix(key_prefix)
                     kms_key = None
             else:
                 if self.code_location is None:
-                    code_bucket, _ = parse_s3_url(self.output_path)
-                    code_s3_prefix = self._assign_s3_prefix()
+                    code_bucket, possible_key_prefix = parse_s3_url(self.output_path)
+
+                    if self._is_output_path_set_from_default_bucket_and_prefix:
+                        # Only include possible_key_prefix if the output_path was created from the
+                        # Session's default bucket and prefix. In that scenario, possible_key_prefix
+                        # will either be "" or Session.default_bucket_prefix.
+                        # Note: We cannot do `if (code_bucket == session.default_bucket() and
+                        # key_prefix == session.default_bucket_prefix)` instead because the user
+                        # could have passed in equivalent values themselves to output_path. And
+                        # including the prefix in that case could result in a potentially backwards
+                        # incompatible behavior change for the end user.
+                        code_s3_prefix = self._assign_s3_prefix(possible_key_prefix)
+                    else:
+                        code_s3_prefix = self._assign_s3_prefix()
+
                     kms_key = self.output_kms_key
                 else:
                     code_bucket, key_prefix = parse_s3_url(self.code_location)
@@ -905,18 +929,13 @@ def _assign_s3_prefix(self, key_prefix=""):
         """
         from sagemaker.workflow.utilities import _pipeline_config
 
-        code_s3_prefix = "/".join(filter(None, [key_prefix, self._current_job_name, "source"]))
+        code_s3_prefix = s3.s3_path_join(key_prefix, self._current_job_name, "source")
         if _pipeline_config and _pipeline_config.code_hash:
-            code_s3_prefix = "/".join(
-                filter(
-                    None,
-                    [
-                        key_prefix,
-                        _pipeline_config.pipeline_name,
-                        "code",
-                        _pipeline_config.code_hash,
-                    ],
-                )
+            code_s3_prefix = s3.s3_path_join(
+                key_prefix,
+                _pipeline_config.pipeline_name,
+                "code",
+                _pipeline_config.code_hash,
             )
         return code_s3_prefix
 
@@ -1060,8 +1079,12 @@ def _set_source_s3_uri(self, rule):
         if "source_s3_uri" in (rule.rule_parameters or {}):
             parse_result = urlparse(rule.rule_parameters["source_s3_uri"])
             if parse_result.scheme != "s3":
-                desired_s3_uri = os.path.join(
-                    "s3://", self.sagemaker_session.default_bucket(), rule.name, str(uuid.uuid4())
+                desired_s3_uri = s3.s3_path_join(
+                    "s3://",
+                    self.sagemaker_session.default_bucket(),
+                    self.sagemaker_session.default_bucket_prefix,
+                    rule.name,
+                    str(uuid.uuid4()),
                 )
                 s3_uri = S3Uploader.upload(
                     local_path=rule.rule_parameters["source_s3_uri"],

src/sagemaker/experiments/_helper.py

@@ -19,6 +19,7 @@
 
 import botocore
 
+from sagemaker import s3
 from sagemaker.experiments._utils import is_already_exist_error
 
 logger = logging.getLogger(__name__)
@@ -75,8 +76,17 @@ def upload_artifact(self, file_path):
             raise ValueError(
                 "{} does not exist or is not a file. Please supply a file path.".format(file_path)
             )
-        if not self.artifact_bucket:
-            self.artifact_bucket = self.sagemaker_session.default_bucket()
+
+        # If self.artifact_bucket is falsy, it will be set to sagemaker_session.default_bucket.
+        # In that case, and if sagemaker_session.default_bucket_prefix exists, self.artifact_prefix
+        # needs to be updated too (because not updating self.artifact_prefix would result in
+        # different behavior the 1st time this method is called vs the 2nd).
+        self.artifact_bucket, self.artifact_prefix = s3.determine_bucket_and_prefix(
+            bucket=self.artifact_bucket,
+            key_prefix=self.artifact_prefix,
+            sagemaker_session=self.sagemaker_session,
+        )
+
         artifact_name = os.path.basename(file_path)
         artifact_s3_key = "{}/{}/{}".format(
             self.artifact_prefix, self.trial_component_name, artifact_name
@@ -96,8 +106,17 @@ def upload_object_artifact(self, artifact_name, artifact_object, file_extension=
         Returns:
             str: The s3 URI of the uploaded file and the version of the file.
         """
-        if not self.artifact_bucket:
-            self.artifact_bucket = self.sagemaker_session.default_bucket()
+
+        # If self.artifact_bucket is falsy, it will be set to sagemaker_session.default_bucket.
+        # In that case, and if sagemaker_session.default_bucket_prefix exists, self.artifact_prefix
+        # needs to be updated too (because not updating self.artifact_prefix would result in
+        # different behavior the 1st time this method is called vs the 2nd).
+        self.artifact_bucket, self.artifact_prefix = s3.determine_bucket_and_prefix(
+            bucket=self.artifact_bucket,
+            key_prefix=self.artifact_prefix,
+            sagemaker_session=self.sagemaker_session,
+        )
+
         if file_extension:
             artifact_name = (
                 artifact_name + ("" if file_extension.startswith(".") else ".") + file_extension