Atualmente, estou trabalhando em um trabalho ETL Dataflow (usando o Apache Beam Python SDK) que consulta dados do CloudSQL (compsycopg2 e um costumeParDo) e grava no BigQuery. Meu objetivo é criar um modelo de fluxo de dados que eu possa iniciar em um AppEngine usando um trabalho Cron.

Eu tenho uma versão que funciona localmente usando o DirectRunner. Para isso, uso o cliente proxy CloudSQL (Postgres) para poder conectar-me ao banco de dados no 127.0.0.1.

Ao usar o DataflowRunner com comandos personalizados para iniciar o proxy em um script setup.py, o trabalho não será executado. É difícil repetir esta mensagem de log:

Setting node annotation to enable volume controller attach/detach

Parte do meu setup.py é semelhante ao seguinte:

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'])

Eu adicionei a última linha como separadasubprocess.Popen() dentrorun() depois de leresta problema no Github desthomp eesta discussão sobre Stackoverflo. Eu também tentei brincar com alguns parâmetros desubprocess.Popen.

Outra solução mencionada daBrodin era permitir o acesso de todos os endereços IP e conectar-se via nome de usuário e senha. No meu entender, ele não afirma isso como uma boa prática.

Agradecemos antecipadamente por sua ajuda.

!!! Solução alternativa na parte inferior deste post !!!

Atualização - arquivos de log

Estes são os logs no nível de erro que ocorrem durante um trabalho:

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. 

Aqui você encontra todos os logs após o início do meu setup.py personalizado (nível de log: qualquer; todos os logs):

https://jpst.it/1gk2Z

Atualizar arquivos de log 2

Logs de trabalho (cancelei manualmente o trabalho depois de não ficar preso por um tempo):

 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...

Rastreios de pilha:

No errors have been received in this time period.

Atualização: A solução alternativa pode ser encontrada na minha resposta abaixo