Create Python SDK Distroless variant (apache#33160)

* Create Python SDK Distroless variant

* Trigger Python PostCommit

* Add support for LANG UTF8

.github/trigger_files/beam_PostCommit_Python.json

@@ -1,5 +1,5 @@
 {
   "comment": "Modify this file in a trivial way to cause this test suite to run.",
-  "modification": 4
+  "modification": 5
 }
 

sdks/python/container/Dockerfile-distroless

@@ -0,0 +1,50 @@
+###############################################################################
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you under the Apache License, Version 2.0 (the
+#  "License"); you may not use this file except in compliance
+#  with the License.  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License 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.
+###############################################################################
+
+ARG BASE
+FROM ${BASE} AS base
+ENV LANG=C.UTF8
+ARG TARGETARCH
+LABEL Author="Apache Beam <[email protected]>"
+
+RUN if [ -z "${TARGETARCH}" ]; then echo "fatal: TARGETARCH not set; run as docker buildx build or use --build-arg=TARGETARCH=amd64|arm64" >&2; exit 1; fi
+
+FROM gcr.io/distroless/python3-debian12:latest-${TARGETARCH} AS distroless
+
+# Prevents internal errors found with distroless container images and Flex templates.
+COPY --from=base /usr/lib/locale /usr/lib/locale
+
+# Contains header files needed by the Python interpreter.
+COPY --from=base /usr/local/include /usr/local/include
+
+# Contains the Python interpreter executables.
+COPY --from=base /usr/local/bin /usr/local/bin
+
+# Contains the Python library dependencies.
+COPY --from=base /usr/local/lib /usr/local/lib
+
+# Python standard library modules.
+COPY --from=base /usr/lib/python* /usr/lib/.
+
+# Contains the boot entrypoint and related files such as licenses.
+COPY --from=base /opt /opt
+
+ENV PATH "$PATH:/usr/local/bin"
+
+# Despite the ENTRYPOINT set in base image, need to reset since deriving the layer derives from a different image.
+ENTRYPOINT ["/opt/apache/beam/boot"]

sdks/python/test-suites/dataflow/common.gradle

@@ -380,6 +380,50 @@ task validatesContainer() {
   }
 }
 
+tasks.register('validatesDistrolessContainer', Task.class) {
+  dependsOn 'initializeForDataflowJob'
+  def repository = "us.gcr.io/apache-beam-testing/${System.getenv('USER')}"
+  def tag = java.time.Instant.now().getEpochSecond()
+  def imageURL = "${repository}/beam_python${pythonVersion}_sdk_distroless:${tag}"
+  doLast {
+    exec {
+      executable 'docker'
+      workingDir rootDir
+      args = [
+              'buildx',
+              'build',
+              '-t',
+              imageURL,
+              '-f',
+              'sdks/python/container/Dockerfile-distroless',
+              "--build-arg=BASE=gcr.io/apache-beam-testing/beam-sdk/beam_python${pythonVersion}_sdk",
+              "."
+      ]
+    }
+    exec {
+      executable 'docker'
+      args = ['push', imageURL]
+    }
+    exec {
+      def testTarget = "apache_beam/examples/wordcount_it_test.py::WordCountIT::test_wordcount_it"
+      def argMap = [
+              "output"             : "gs://temp-storage-for-end-to-end-tests/py-it-cloud/output",
+              "project"            : "apache-beam-testing",
+              "region"             : "us-central1",
+              "runner"             : "TestDataflowRunner",
+              "sdk_container_image": "${imageURL}",
+              "sdk_location"       : "container",
+              "staging_location"   : "gs://temp-storage-for-end-to-end-tests/staging-it",
+              "temp_location"      : "gs://temp-storage-for-end-to-end-tests/temp-it",
+      ]
+      def cmdArgs = mapToArgString(argMap)
+      workingDir = "${rootDir}/sdks/python"
+      executable 'sh'
+      args '-c', ". ${envdir}/bin/activate && pytest ${testTarget} --test-pipeline-options=\"${cmdArgs}\""
+    }
+  }
+}
+
 task validatesContainerARM() {
   def pyversion = "${project.ext.pythonVersion.replace('.', '')}"
   dependsOn 'initializeForDataflowJob'