4 Commits (ea5a455656072b9754789dffe4e03052ff3bef3d)

Author	SHA1	Message	Date
Toshio Kuratomi	52449cc01a	AnsiballZ improvements ... Now that we don't need to worry about python-2.4 and 2.5, we can make some improvements to the way AnsiballZ handles modules. * Change AnsiballZ wrapper to use import to invoke the module We need the module to think of itself as a script because it could be coded as: main() or as: if __name__ == '__main__': main() Or even as: if __name__ == '__main__': random_function_name() A script will invoke all of those. Prior to this change, we invoked a second Python interpreter on the module so that it really was a script. However, this means that we have to run python twice (once for the AnsiballZ wrapper and once for the module). This change makes the module think that it is a script (because __name__ in the module == '__main__') but it's actually being invoked by us importing the module code. There's three ways we've come up to do this. * The most elegant is to use zipimporter and tell the import mechanism that the module being loaded is __main__: * 5959f11c9d/lib/ansible/executor/module_common.py (L175) * zipimporter is nice because we do not have to extract the module from the zip file and save it to the disk when we do that. The import machinery does it all for us. * The drawback is that modules do not have a __file__ which points to a real file when they do this. Modules could be using __file__ to for a variety of reasons, most of those probably have replacements (the most common one is to find a writable directory for temporary files. AnsibleModule.tmpdir should be used instead) We can monkeypatch __file__ in fom AnsibleModule initialization but that's kind of gross. There's no way I can see to do this from the wrapper. * Next, there's imp.load_module(): * https://github.com/abadger/ansible/blob/340edf7489/lib/ansible/executor/module_common.py#L151 * imp has the nice property of allowing us to set __name__ to __main__ without changing the name of the file itself * We also don't have to do anything special to set __file__ for backwards compatibility (although the reason for that is the drawback): * Its drawback is that it requires the file to exist on disk so we have to explicitly extract it from the zipfile and save it to a temporary file * The last choice is to use exec to execute the module: * https://github.com/abadger/ansible/blob/f47a4ccc76/lib/ansible/executor/module_common.py#L175 * The code we would have to maintain for this looks pretty clean. In the wrapper we create a ModuleType, set __file__ on it, read the module's contents in from the zip file and then exec it. * Drawbacks: We still have to explicitly extract the file's contents from the zip archive instead of letting python's import mechanism handle it. * Exec also has hidden performance issues and breaks certain assumptions that modules could be making about their own code: http://lucumr.pocoo.org/2011/2/1/exec-in-python/ Our plan is to use imp.load_module() for now, deprecate the use of __file__ in modules, and switch to zipimport once the deprecation period for __file__ is over (without monkeypatching a fake __file__ in via AnsibleModule). * Rename the name of the AnsiBallZ wrapped module This makes it obvious that the wrapped module isn't the module file that we distribute. It's part of trying to mitigate the fact that the module is now named __main)).py in tracebacks. * Shield all wrapper symbols inside of a function With the new import code, all symbols in the wrapper become visible in the module. To mitigate the chance of collisions, move most symbols into a toplevel function. The only symbols left in the global namespace are now _ANSIBALLZ_WRAPPER and _ansiballz_main. revised porting guide entry Integrate code coverage collection into AnsiballZ. ci_coverage ci_complete	8 years ago
Jordan Borean	8bdd04c147	Fix remote_tmp when become with non admin user (#42396) ... * Fix tmpdir on non root become - also avoid exception if tmpdir and remote_tmp are None - give 'None' on deescalation so tempfile will fallback to it's default behaviour and use system dirs - fix issue with bad tempdir (not existing/not createable/not writeable) i.e nobody and ~/.ansible/tmp - added tests for blockfile case * Revert "Temporarily revert c119d54" This reverts commit 5c614a59a6. * changes based on PR feedback and changelog fragment * changes based on the review * Fix tmpdir when makedirs failed so we just use the system tmp * Let missing remote_tmp fail If remote_tmp is missing then there's something more basic wrong in the communication from the controller to the module-side. It's better to be alerted in this case than to silently ignore it. jborean and I have independently checked what happens if the user sets ansible_remote_tmp to empty string and !!null and both cases work fine. (null is turned into a default value controller-side. empty string triggers the warning because it is probably not a directory that the become user is able to use).	8 years ago
Jordan Borean	5c39c3b2d1	Module basic.py to create parent dirs of tmpdir if needed (#40201) ... * Module basic.py to create parent dirs of tmpdir if needed * Added warning to dir creation * Assert if make_dirs was called or not in unit tests	8 years ago
Jordan Borean	44ab948e5d	create module tmpdir based on remote_tmp (#39833) ... * create module tmpdir based on remote_tmp * Source remote_tmp from controller if possible * Fixed sanity test and not use lambda * Added expansion of env vars to the remote tmp * Fixed sanity issues * Added note around shell remote_tmp option * Changed fallback tmp dir to ~/.ansible/tmp to make shell defaults	8 years ago