This seems simple, but I am trying to replicate the following Docker command using Docker-py:
docker exec dockerName cat /var/log/foo.log
Using dockerpy, it seems the following should work:
from docker.client import Client
from docker.utils import kwargs_from_env
cli = Client(**kwargs_from_env())
print kwargs_from_env()
name_one = 'exec_container'
cli.create_container(**{'name': name_one, 'image': 'golang'})
cli.start(name_one)
cli.logs(name_one, stdout=True, stderr=True) # commenting this line out allows the below to execute perfectly
e = cli.exec_create(container=name_one, cmd='ls /usr/local/bin')
print cli.exec_start(exec_id=e['Id'])
However when I run this I receive the following error trace:
File "/Library/Python/2.7/site-packages/docker/utils/decorators.py", line 35, in wrapper
return f(self, *args, **kwargs)
File "/Library/Python/2.7/site-packages/docker/api/exec_api.py", line 75, in exec_start
return self._get_result_tty(stream, res, tty)
File "/Library/Python/2.7/site-packages/docker/client.py", line 311, in _get_result_tty
self._raise_for_status(res)
File "/Library/Python/2.7/site-packages/docker/client.py", line 146, in _raise_for_status
raise errors.APIError(e, response, explanation=explanation)
docker.errors.APIError: 500 Server Error: Internal Server Error ("http: Hijack is incompatible with use of CloseNotifier")
I am not really sure what I am doing incorrectly or need to do differently for docker-py. Immediately after the above I can then execute the command line command fine.
Versions of everything:
docker --version
Docker version 1.10.0, build 590d5108
docker-machine --version
docker-machine version 0.6.0, build e27fb87
pip freeze | grep docker-py
docker-py==1.7.2
Docker-py has a bug or unexpected behavior in this situation.
The temporary solution is to instantiate a new client, which then allows you to do the following:
from docker.client import Client
from docker.utils import kwargs_from_env
cli = Client(**kwargs_from_env())
print kwargs_from_env()
name_one = 'exec_container'
cli.create_container(**{'name': name_one, 'image': 'golang'})
cli.start(name_one)
cli.logs(name_one, stdout=True, stderr=True)
cli2 = Client(**kwargs_from_env())
e = cli2.exec_create(container=name_one, cmd='ls /usr/local/bin')
print cli2.exec_start(exec_id=e['Id'])
This will be required until the version of Go that docker is built against includes this bug fix.