Actualmente estoy trabajando en un trabajo ETL Dataflow (usando el SDK de Apache Beam Python) que consulta datos de CloudSQL (conpsycopg2 y una @ personalizaParDo) y lo escribe en BigQuery. Mi objetivo es crear una plantilla de flujo de datos que pueda comenzar desde un AppEngine usando un trabajo Cron.

Tengo una versión que funciona localmente con DirectRunner. Para eso utilizo el cliente proxy CloudSQL (Postgres) para poder conectarme a la base de datos en 127.0.0.1.

Al usar el DataflowRunner con comandos personalizados para iniciar el proxy dentro de un script setup.py, el trabajo no se ejecutará. Se atasca al repetir este mensaje de registro:

Setting node annotation to enable volume controller attach/detach

Una parte de mi setup.py tiene el siguiente aspecto:

CUSTOM_COMMANDS = [
['echo', 'Custom command worked!'],
['wget', 'https://dl.google.com/cloudsql/cloud_sql_proxy.linux.amd64', '-O', 'cloud_sql_proxy'],
['echo', 'Proxy downloaded'],
['chmod', '+x', 'cloud_sql_proxy']]

class CustomCommands(setuptools.Command):
  """A setuptools Command class able to run arbitrary commands."""

  def initialize_options(self):
    pass

  def finalize_options(self):
    pass

  def RunCustomCommand(self, command_list):
    print('Running command: %s' % command_list)
    logging.info("Running custom commands")
    p = subprocess.Popen(
        command_list,
        stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    # Can use communicate(input='y\n'.encode()) if the command run requires
    # some confirmation.
    stdout_data, _ = p.communicate()
    print('Command output: %s' % stdout_data)
    if p.returncode != 0:
      raise RuntimeError(
          'Command %s failed: exit code: %s' % (command_list, p.returncode))

  def run(self):
    for command in CUSTOM_COMMANDS:
      self.RunCustomCommand(command)
    subprocess.Popen(['./cloud_sql_proxy', '-instances=bi-test-1:europe-west1:test-animal=tcp:5432'])

Agregué la última línea como @ separasubprocess.Popen() dentrorun() despues de leerest problema en Github de sthomp yest discusión sobre Stackoverflo. También intenté jugar con algunos parámetros desubprocess.Popen.

Otra solución mencionada de brodin era permitir el acceso desde cada dirección IP y conectarse mediante nombre de usuario y contraseña. Según tengo entendido, no afirma que esto sea la mejor práctica.

Gracias de antemano por su ayuda.

!!! Solución alternativa al final de esta publicación !!!

Update - Logfiles

Estos son los registros en el nivel de error que ocurren durante un trabajo:

E  EXT4-fs (dm-0): couldn't mount as ext3 due to feature incompatibilities 
E  Image garbage collection failed once. Stats initialization may not have completed yet: unable to find data for container / 
E  Failed to check if disk space is available for the runtime: failed to get fs info for "runtime": unable to find data for container / 
E  Failed to check if disk space is available on the root partition: failed to get fs info for "root": unable to find data for container / 
E  [ContainerManager]: Fail to get rootfs information unable to find data for container / 
E  Could not find capacity information for resource storage.kubernetes.io/scratch 
E  debconf: delaying package configuration, since apt-utils is not installed 
E    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current 
E                                   Dload  Upload   Total   Spent    Left  Speed 
E  
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  3698  100  3698    0     0  25674      0 --:--:-- --:--:-- --:--:-- 25860 



#-- HERE IS WHEN setup.py FOR MY JOB IS EXECUTED ---

E  debconf: delaying package configuration, since apt-utils is not installed 
E  insserv: warning: current start runlevel(s) (empty) of script `stackdriver-extractor' overrides LSB defaults (2 3 4 5). 
E  insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `stackdriver-extractor' overrides LSB defaults (0 1 6). 
E  option = Interval; value = 60.000000; 
E  option = FQDNLookup; value = false; 
E  Created new plugin context. 
E  option = PIDFile; value = /var/run/stackdriver-agent.pid; 
E  option = Interval; value = 60.000000; 
E  option = FQDNLookup; value = false; 
E  Created new plugin context. 

Aquí puede encontrar todos los registros después del inicio de mi setup.py personalizado (nivel de registro: cualquiera; todos los registros):

https: //jpst.it/1gk2

Actualizar archivos de registro 2

Registros de trabajo (cancelé manualmente el trabajo después de no quedarme bloqueado por un tiempo):

 2018-06-08 (08:02:20) Autoscaling is enabled for job 2018-06-07_23_02_20-5917188751755240698. The number of workers will b...
 2018-06-08 (08:02:20) Autoscaling was automatically enabled for job 2018-06-07_23_02_20-5917188751755240698.
 2018-06-08 (08:02:24) Checking required Cloud APIs are enabled.
 2018-06-08 (08:02:24) Checking permissions granted to controller Service Account.
 2018-06-08 (08:02:25) Worker configuration: n1-standard-1 in europe-west1-b.
 2018-06-08 (08:02:25) Expanding CoGroupByKey operations into optimizable parts.
 2018-06-08 (08:02:25) Combiner lifting skipped for step Save new watermarks/Write/WriteImpl/GroupByKey: GroupByKey not fol...
 2018-06-08 (08:02:25) Combiner lifting skipped for step Group watermarks: GroupByKey not followed by a combiner.
 2018-06-08 (08:02:25) Expanding GroupByKey operations into optimizable parts.
 2018-06-08 (08:02:26) Lifting ValueCombiningMappingFns into MergeBucketsMappingFns
 2018-06-08 (08:02:26) Annotating graph with Autotuner information.
 2018-06-08 (08:02:26) Fusing adjacent ParDo, Read, Write, and Flatten operations
 2018-06-08 (08:02:26) Fusing consumer Get rows from CloudSQL tables into Begin pipeline with watermarks/Read
 2018-06-08 (08:02:26) Fusing consumer Group watermarks/Write into Group watermarks/Reify
 2018-06-08 (08:02:26) Fusing consumer Group watermarks/GroupByWindow into Group watermarks/Read
 2018-06-08 (08:02:26) Fusing consumer Save new watermarks/Write/WriteImpl/WriteBundles/WriteBundles into Save new watermar...
 2018-06-08 (08:02:26) Fusing consumer Save new watermarks/Write/WriteImpl/GroupByKey/GroupByWindow into Save new watermark...
 2018-06-08 (08:02:26) Fusing consumer Save new watermarks/Write/WriteImpl/GroupByKey/Reify into Save new watermarks/Write/...
 2018-06-08 (08:02:26) Fusing consumer Save new watermarks/Write/WriteImpl/GroupByKey/Write into Save new watermarks/Write/...
 2018-06-08 (08:02:26) Fusing consumer Write to BQ into Get rows from CloudSQL tables
 2018-06-08 (08:02:26) Fusing consumer Group watermarks/Reify into Write to BQ
 2018-06-08 (08:02:26) Fusing consumer Save new watermarks/Write/WriteImpl/Map(<lambda at iobase.py:926>) into Convert dict...
 2018-06-08 (08:02:26) Fusing consumer Save new watermarks/Write/WriteImpl/WindowInto(WindowIntoFn) into Save new watermark...
 2018-06-08 (08:02:26) Fusing consumer Convert dictionary list to single dictionary and json into Remove "watermark" label
 2018-06-08 (08:02:26) Fusing consumer Remove "watermark" label into Group watermarks/GroupByWindow
 2018-06-08 (08:02:26) Fusing consumer Save new watermarks/Write/WriteImpl/InitializeWrite into Save new watermarks/Write/W...
 2018-06-08 (08:02:26) Workflow config is missing a default resource spec.
 2018-06-08 (08:02:26) Adding StepResource setup and teardown to workflow graph.
 2018-06-08 (08:02:26) Adding workflow start and stop steps.
 2018-06-08 (08:02:26) Assigning stage ids.
 2018-06-08 (08:02:26) Executing wait step start25
 2018-06-08 (08:02:26) Executing operation Save new watermarks/Write/WriteImpl/DoOnce/Read+Save new watermarks/Write/WriteI...
 2018-06-08 (08:02:26) Executing operation Save new watermarks/Write/WriteImpl/GroupByKey/Create
 2018-06-08 (08:02:26) Starting worker pool setup.
 2018-06-08 (08:02:26) Executing operation Group watermarks/Create
 2018-06-08 (08:02:26) Starting 1 workers in europe-west1-b...
 2018-06-08 (08:02:27) Value "Group watermarks/Session" materialized.
 2018-06-08 (08:02:27) Value "Save new watermarks/Write/WriteImpl/GroupByKey/Session" materialized.
 2018-06-08 (08:02:27) Executing operation Begin pipeline with watermarks/Read+Get rows from CloudSQL tables+Write to BQ+Gr...
 2018-06-08 (08:02:36) Autoscaling: Raised the number of workers to 0 based on the rate of progress in the currently runnin...
 2018-06-08 (08:02:46) Autoscaling: Raised the number of workers to 1 based on the rate of progress in the currently runnin...
 2018-06-08 (08:03:05) Workers have started successfully.
 2018-06-08 (08:11:37) Cancel request is committed for workflow job: 2018-06-07_23_02_20-5917188751755240698.
 2018-06-08 (08:11:38) Cleaning up.
 2018-06-08 (08:11:38) Starting worker pool teardown.
 2018-06-08 (08:11:38) Stopping worker pool...
 2018-06-08 (08:12:30) Autoscaling: Reduced the number of workers to 0 based on the rate of progress in the currently runni...

Strack Traces:

No errors have been received in this time period.

Update: la solución alternativa se puede encontrar en mi respuesta a continuación