Golang: Preview of managed VM app returns error

Question

I'm trying to preview a Go docker (App Engine ManagedVM) app using the gcloud preview app run command.

But I keep getting this error:

Traceback (most recent call last):
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/dev_appserver.py", line 83, in <module>
    _run_file(__file__, globals())
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/dev_appserver.py", line 79, in _run_file
    execfile(_PATHS.script_file(script_name), globals_)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 985, in <module>
    main()
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 978, in main
    dev_server.start(options)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 774, in start
    self._dispatcher.start(options.api_host, apis.port, request_data)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/dispatcher.py", line 182, in start
    _module, port = self._create_module(module_configuration, port)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/dispatcher.py", line 262, in _create_module
    threadsafe_override=threadsafe_override)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/module.py", line 1463, in __init__
    super(ManualScalingModule, self).__init__(**kwargs)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/module.py", line 514, in __init__
    self._module_configuration)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/module.py", line 237, in _create_instance_factory
    module_configuration=module_configuration)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/vm_runtime_factory.py", line 78, in __init__
    timeout=self.DOCKER_D_REQUEST_TIMEOUT_SECS)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/google/appengine/tools/docker/containers.py", line 740, in NewDockerClient
    client.ping()
  File "/Users/jwesonga/google-cloud-sdk/./lib/docker/docker/client.py", line 711, in ping
    return self._result(self._get(self._url('/_ping')))
  File "/Users/jwesonga/google-cloud-sdk/./lib/docker/docker/client.py", line 76, in _get
    return self.get(url, **self._set_request_timeout(kwargs))
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/lib/requests/requests/sessions.py", line 468, in get
    return self.request('GET', url, **kwargs)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/lib/requests/requests/sessions.py", line 456, in request
    resp = self.send(prep, **send_kwargs)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/lib/requests/requests/sessions.py", line 559, in send
    r = adapter.send(request, **kwargs)
  File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine/lib/requests/requests/adapters.py", line 384, in send
    raise Timeout(e, request=request)
requests.exceptions.Timeout: (<requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x10631c7d0>, 'Connection to 192.168.59.104 timed out. (connect timeout=60)')
ERROR: (gcloud.preview.app.run) DevAppSever failed with error code [1]

I've confirmed that docker is up and running using boot2docker status which returns running This was working before but after a machine reboot, nothing seems to work. Any ideas?

Answer 1

The main issue is:

File "/Users/jwesonga/google-cloud-sdk/platform/google_appengine
       /lib/requests/requests/adapters.py", line 384, in send
    raise Timeout(e, request=request)
requests.exceptions.Timeout:   
(<requests.packages.urllib3.connection.VerifiedHTTPSConnection object 
at 0x10631c7d0>, 'Connection to 192.168.59.104 timed out. 
(connect timeout=60)')
ERROR: (gcloud.preview.app.run) DevAppSever failed with error code [1]

Which is often the case when you have a proxy, and is discussed in pip issue 1805

It is supposed to be fixed in pip1.6, but just in case, you can try the workaround of alexandrem

/opt/venvs/ironic/lib/python2.6/site-packages/pip/_vendor/requests
/adapters.patch.py /opt/venvs/ironic/lib/python2.6/site-packages
/pip/_vendor/requests/adapters.py
209c209
if True or not proxy in self.proxy_manager:
   ^^^^

basically I just add a True to the condition on line 209 of the adapter.py to always create a ProxyManager instance, thus skipping the pool manager logic.