feat: support codeartifact for installing requirements.txt packages

- add a dependency on boto3 for calling codeartifact apis
- update model_server to check for the presence of codeartifact (CA_* prefixed) environment variable
- if env variable is present, build the authenticated endpoint index url, and add that to the pip install command

closes #85

Author: humanzz

setup.py

@@ -29,7 +29,7 @@ def read_version():
 
 packages = setuptools.find_packages(where="src", exclude=("test",))
 
-required_packages = ["numpy", "six", "psutil", "retrying>=1.3.3,<1.4", "scipy"]
+required_packages = ["boto3", "numpy", "six", "psutil", "retrying>=1.3.3,<1.4", "scipy"]
 
 # enum is introduced in Python 3.4. Installing enum back port
 if sys.version_info < (3, 4):

src/sagemaker_inference/model_server.py

@@ -15,10 +15,12 @@
 from __future__ import absolute_import
 
 import os
+import re
 import signal
 import subprocess
 import sys
 
+import boto3
 import pkg_resources
 import psutil
 from retrying import retry
@@ -199,14 +201,67 @@ def _terminate(signo, frame):  # pylint: disable=unused-argument
 def _install_requirements():
     logger.info("installing packages from requirements.txt...")
     pip_install_cmd = [sys.executable, "-m", "pip", "install", "-r", REQUIREMENTS_PATH]
-
+    if os.getenv("CA_REPOSITORY_ARN"):
+        index = _get_codeartifact_index()
+        pip_install_cmd.append("-i")
+        pip_install_cmd.append(index)
     try:
         subprocess.check_call(pip_install_cmd)
     except subprocess.CalledProcessError:
         logger.error("failed to install required packages, exiting")
         raise ValueError("failed to install required packages")
 
 
+def _get_codeartifact_index():
+    """
+    Build the authenticated codeartifact index url
+    https://docs.aws.amazon.com/codeartifact/latest/ug/python-configure-pip.html
+    https://docs.aws.amazon.com/service-authorization/latest/reference/list_awscodeartifact.html#awscodeartifact-resources-for-iam-policies
+    :return: authenticated codeartifact index url
+    """
+    repository_arn = os.getenv("CA_REPOSITORY_ARN")
+    arn_regex = (
+        "arn:(?P<partition>[^:]+):codeartifact:(?P<region>[^:]+):(?P<account>[^:]+)"
+        ":repository/(?P<domain>[^/]+)/(?P<repository>.+)"
+    )
+    m = re.match(arn_regex, repository_arn)
+    if not m:
+        raise Exception("invalid CodeArtifact repository arn {}".format(repository_arn))
+    domain = m.group("domain")
+    owner = m.group("account")
+    repository = m.group("repository")
+    region = m.group("region")
+
+    logger.info(
+        "configuring pip to use codeartifact "
+        "(domain: %s, domain owner: %s, repository: %s, region: %s)",
+        domain,
+        owner,
+        repository,
+        region,
+    )
+    try:
+        client = boto3.client("codeartifact", region_name=region)
+        auth_token_response = client.get_authorization_token(domain=domain, domainOwner=owner)
+        token = auth_token_response["authorizationToken"]
+        endpoint_response = client.get_repository_endpoint(
+            domain=domain, domainOwner=owner, repository=repository, format="pypi"
+        )
+        unauthenticated_index = endpoint_response["repositoryEndpoint"]
+        return re.sub(
+            "https://",
+            "https://aws:{}@".format(token),
+            re.sub(
+                "{}/?$".format(repository),
+                "{}/simple/".format(repository),
+                unauthenticated_index,
+            ),
+        )
+    except Exception:
+        logger.error("failed to configure pip to use codeartifact")
+        raise Exception("failed to configure pip to use codeartifact")
+
+
 def _retry_retrieve_mms_server_process(startup_timeout):
     retrieve_mms_server_process = retry(wait_fixed=1000, stop_max_delay=startup_timeout * 1000)(
         _retrieve_mms_server_process

test/unit/test_model_server.py

@@ -13,9 +13,12 @@
 import os
 import signal
 import subprocess
+import sys
 import types
 
-from mock import ANY, Mock, patch
+import botocore.session
+from botocore.stub import Stubber
+from mock import ANY, MagicMock, Mock, patch
 import pytest
 
 from sagemaker_inference import environment, model_server
@@ -224,6 +227,16 @@ def test_add_sigterm_handler(signal_call):
 def test_install_requirements(check_call):
     model_server._install_requirements()
 
+    install_cmd = [
+        sys.executable,
+        "-m",
+        "pip",
+        "install",
+        "-r",
+        "/opt/ml/model/code/requirements.txt",
+    ]
+    check_call.assert_called_once_with(install_cmd)
+
 
 @patch("subprocess.check_call", side_effect=subprocess.CalledProcessError(0, "cmd"))
 def test_install_requirements_installation_failed(check_call):
@@ -233,6 +246,49 @@ def test_install_requirements_installation_failed(check_call):
     assert "failed to install required packages" in str(e.value)
 
 
+@patch.dict(os.environ, {"CA_REPOSITORY_ARN": "invalid_arn"}, clear=True)
+def test_install_requirements_codeartifact_invalid_arn_installation_failed():
+    with pytest.raises(Exception) as e:
+        model_server._install_requirements()
+
+    assert "invalid CodeArtifact repository arn invalid_arn" in str(e.value)
+
+
+@patch("subprocess.check_call")
+@patch.dict(
+    os.environ,
+    {
+        "CA_REPOSITORY_ARN": "arn:aws:codeartifact:my_region:012345678900:repository/my_domain/my_repo"
+    },
+    clear=True,
+)
+def test_install_requirements_codeartifact(check_call):
+    # mock/stub codeartifact client and its responses
+    endpoint = "https://domain-012345678900.d.codeartifact.region.amazonaws.com/pypi/my_repo/"
+    codeartifact = botocore.session.get_session().create_client(
+        "codeartifact", region_name="myregion"
+    )
+    stubber = Stubber(codeartifact)
+    stubber.add_response("get_authorization_token", {"authorizationToken": "the-auth-token"})
+    stubber.add_response("get_repository_endpoint", {"repositoryEndpoint": endpoint})
+    stubber.activate()
+
+    with patch("boto3.client", MagicMock(return_value=codeartifact)):
+        model_server._install_requirements()
+
+    install_cmd = [
+        sys.executable,
+        "-m",
+        "pip",
+        "install",
+        "-r",
+        "/opt/ml/model/code/requirements.txt",
+        "-i",
+        "https://aws:the-auth-token@domain-012345678900.d.codeartifact.region.amazonaws.com/pypi/my_repo/simple/",
+    ]
+    check_call.assert_called_once_with(install_cmd)
+
+
 @patch("psutil.process_iter")
 def test_retrieve_mms_server_process(process_iter):
     server = Mock()