[GitHub] [flink] WeiZhong94 commented on a change in pull request #9655: [FLINK-14017][python] Support to start up Python worker in process mode.

[GitBox <gi...@apache.org>]

WeiZhong94 commented on a change in pull request #9655: [FLINK-14017][python] Support to start up Python worker in process mode.
URL: https://github.com/apache/flink/pull/9655#discussion_r324671540
 
 

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 File path: flink-python/pyflink/fn_execution/boot.py
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+#!/usr/bin/env python
+#################################################################################
+#  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.
+################################################################################
+"""
+This script is a python implementation of the "boot.go" script in "beam-sdks-python-container"
+project of Apache Beam, see in:
+
+https://github.com/apache/beam/blob/release-2.14.0/sdks/python/container/boot.go
+
+Its original version is implemented by golang and involves unnecessary dependencies, so we
+re-implemented and modified it in python to support running in process mode and
+custom operators.
+
+It downloads and installs users' python artifacts, then launches the python SDK harness of
+Apache Beam.
+
+"""
+import argparse
+import hashlib
+import os
+from subprocess import call
+
+import grpc
+import logging
+import sys
+
+from apache_beam.portability.api.beam_provision_api_pb2_grpc import ProvisionServiceStub
+from apache_beam.portability.api.beam_provision_api_pb2 import GetProvisionInfoRequest
+from apache_beam.portability.api.beam_artifact_api_pb2_grpc import ArtifactRetrievalServiceStub
+from apache_beam.portability.api.beam_artifact_api_pb2 import (GetManifestRequest,
+                                                               GetArtifactRequest)
+from apache_beam.portability.api.endpoints_pb2 import ApiServiceDescriptor
+
+from google.protobuf import json_format, text_format
+
+parser = argparse.ArgumentParser()
+
+parser.add_argument("--id", default="", help="Local identifier (required).")
+parser.add_argument("--logging_endpoint", default="",
+                    help="Logging endpoint (required).")
+parser.add_argument("--artifact_endpoint", default="",
+                    help="Artifact endpoint (required).")
+parser.add_argument("--provision_endpoint", default="",
+                    help="Provision endpoint (required).")
+parser.add_argument("--control_endpoint", default="",
+                    help="Control endpoint (required).")
+parser.add_argument("--semi_persist_dir", default="/tmp",
+                    help="Local semi-persistent directory (optional).")
+
+args = parser.parse_args()
+
+worker_id = args.id
+logging_endpoint = args.logging_endpoint
+artifact_endpoint = args.artifact_endpoint
+provision_endpoint = args.provision_endpoint
+control_endpoint = args.control_endpoint
+semi_persist_dir = args.semi_persist_dir
+
+if worker_id == "":
+    logging.fatal("No id provided.")
+
+if logging_endpoint == "":
+    logging.fatal("No logging endpoint provided.")
+
+if artifact_endpoint == "":
+    logging.fatal("No artifact endpoint provided.")
+
+if provision_endpoint == "":
+    logging.fatal("No provision endpoint provided.")
+
+if control_endpoint == "":
+    logging.fatal("No control endpoint provided.")
+
+logging.info("Initializing python harness: %s" % " ".join(sys.argv))
+
+metadata = [("worker_id", worker_id)]
+
+# read job information from provision stub
+with grpc.insecure_channel(provision_endpoint) as channel:
+    client = ProvisionServiceStub(channel=channel)
+    info = client.GetProvisionInfo(GetProvisionInfoRequest(), metadata=metadata).info
+    options = json_format.MessageToJson(info.pipeline_options)
+
+staged_dir = os.path.join(semi_persist_dir, "staged")
+files = []
+
+# download files
+with grpc.insecure_channel(artifact_endpoint) as channel:
+    client = ArtifactRetrievalServiceStub(channel=channel)
+    # get file list via retrieval token
+    response = client.GetManifest(GetManifestRequest(retrieval_token=info.retrieval_token),
+                                  metadata=metadata)
+    artifacts = response.manifest.artifact
+    # download files and check hash values
+    for artifact in artifacts:
+        name = artifact.name
+        files.append(name)
+        permissions = artifact.permissions
+        sha256 = artifact.sha256
+        file_path = os.path.join(staged_dir, name)
+        if os.path.exists(file_path):
+            with open(file_path, "rb") as f:
+                sha256obj = hashlib.sha256()
+                sha256obj.update(f.read())
+                hash_value = sha256obj.hexdigest()
+            if hash_value == sha256:
+                logging.info("file exist and has same sha256 hash value, skip...")
+                continue
+            else:
+                os.remove(file_path)
+        if not os.path.exists(os.path.dirname(file_path)):
+            os.makedirs(os.path.dirname(file_path), 0o755)
+        stream = client.GetArtifact(
+            GetArtifactRequest(name=name, retrieval_token=info.retrieval_token), metadata=metadata)
+        with open(file_path, "wb") as f:
+            sha256obj = hashlib.sha256()
+            for artifact_chunk in stream:
+                sha256obj.update(artifact_chunk.data)
+                f.write(artifact_chunk.data)
+            hash_value = sha256obj.hexdigest()
+        if hash_value != sha256:
+            raise Exception("sha256 not consist!")
+        os.chmod(file_path, permissions)
+
+acceptable_whl_specs = [".whl"]
+
+
+def find_beam_sdk_whl():
+    """
+    Find apache beam sdk wheel package in downloaded files. If found, it will be installed.
+
+    :return: the file name of apache beam sdk wheel package.
+    """
+    for filename in files:
+        if filename.startswith("apache_beam"):
+            for acceptable_whl_spec in acceptable_whl_specs:
+                if filename.endswith(acceptable_whl_spec):
+                    logging.info("Found Apache Beam SDK wheel: %s" % filename)
+                    return filename
+    return ""
+
+
+def python_location():
+    """
+    Returns the python executable file location.
+    If the environment variable "python" exists, using its value.
+
+    :return: The python executable file location. Default value is "python".
+    """
+    if "python" in os.environ:
+        return os.environ["python"]
+    else:
+        return "python"
+
+
+def pip_command():
 
 Review comment:
   In some case it returns a command (e.g. python -m pip) instead of a pip location, maybe "pip_command" makes more sense here?

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