The "Developing Modules" documentation states:
Include a minimum of dependencies if possible. If there are
dependencies, document them at the top of the module file, and have
the module raise JSON error messages when the import fails.
When docker_service runs on a remote host without PyYAML it crashes with
ImportError.
This patch raises a JSON error message when import fails, but only if
the PyYAML module is actually used. It's only needed when the
"definition" parameter is given.
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
Reading the entire tar file into memory can result in out-of-memory
conditions such as this traceback:
Traceback (most recent call last):
File "/tmp/ansible_YELTSu/ansible_module_docker_image.py", line 486, in load_image
self.client.load_image(image_data)
File "/usr/local/lib/python2.7/dist-packages/docker/api/image.py", line 147, in load_image
res = self._post(self._url("/images/load"), data=data)
...
File "/usr/lib/python2.7/httplib.py", line 997, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 848, in _send_output
msg += message_body
MemoryError
Luckily docker-py's load_image(), which calls requests post(), accepts a
file-like object instead of a string. Pass in the file object to avoid
reading the full file into memory. This allows larger tar files to load
succesfully.
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
* This moves the lines in the code that parse the `env` and `env_file` options for docker to the end of the `__init__()` function.
This is needed because the `_check_capabilites` function needs both a working `self.client` and a proper `self.docker_py_versioninfo`.
`_check_capabilities` is used by `ensure_capabilities` which is, in turn, used by `get_environment`
This means that before this commit, the environment variables could not be loaded because both `self.client` and `self.docker_py_versioninfo` were not set at that time.
This commit fixes that by putting the environment variable parsing after those two.
* This moves the lines in the code that parse the `env` and `env_file` options for docker to the end of the `__init__()` function.
This is needed because the `_check_capabilites` function needs both a working `self.client` and a proper `self.docker_py_versioninfo`.
`_check_capabilities` is used by `ensure_capabilities` which is, in turn, used by `get_environment`
This means that before this commit, the environment variables could not be loaded because both `self.client` and `self.docker_py_versioninfo` were not set at that time.
This commit fixes that by putting the environment variable parsing after those two.
