How do you get exit code connect_get_namespaced_pod_exec ?

[oz123]

Currently I have to simply do this:

        response = stream(self.api.connect_get_namespaced_pod_exec,
                          podname, 'kube-system',
                          command=exec_command,
                          stderr=False, stdin=False,
                          stdout=True, tty=False)

        if not response:
            do_something__()

However, I can't get the error code, or the stderror.
Looking at the source code I don't see an easy way.

[tomplus]

@oz123 The error code arrives in the channel number 3 (error-channel) but it is not exposed by the stream() method.

As a workaround you can use:

from kubernetes.stream.ws_client import ERROR_CHANNEL
....

client = stream(api.connect_get_namespaced_pod_exec,
                "myapp-78898448f4-pgnfl",
                "default",
                command=["false"],                  # <<< "false" returns with exit code = 1
                stderr=True, stdin=False,
                stdout=True, tty=False,
                _preload_content=False)             #  <<< we need a client object

client.run_forever(timeout=60)
err = client.read_channel(ERROR_CHANNEL)

pprint(yaml.load(err))

and you should get

{'details': {'causes': [{'message': '1', 'reason': 'ExitCode'}]},
 'message': 'command terminated with non-zero exit code: Error executing in '
            'Docker Container: 1',
 'metadata': {},
 'reason': 'NonZeroExitCode',
 'status': 'Failure'}

I'm going to add a method to get it in more convenient way.

[phracek]

CC @TomasTomecek

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[roycaihw]

fixed by kubernetes-client/python-base#160

/close

[k8s-ci-robot]

@roycaihw: Closing this issue.

In response to this:

fixed by kubernetes-client/python-base#160

/close

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[sunchill06]

@tomplus

When I run this as

resp = stream(v1.connect_get_namespaced_pod_exec, podName, namespace, command=exec_command, stderr=True, stdin=False, stdout=True, tty=False, _preload_content=preloadContent)

resp.run_forever(timeout=5)
print(resp.readline_channel(1))

Response:
None

However, print(resp.read_channel(1)) gives me proper output.

Any pointers why?