mitogen/master.py:
Annotate forwarded log entries with their original source, logger
name, and message.
ansible:
mark stderr in red with -vvv
Tempting to make this appaer 100% of the time, but some crappy
bashrcs may cause lots of junk to be printed.
This implements the first edition of Connection Delegation, where
delegating connection establishment is initially single-threaded.
ansible_mitogen/strategy.py:
ansible_mitogen/plugins/connection/*:
Begin splitting connection.Connection into subclasses, exposing them
directly as "mitogen_ssh", "mitogen_local", etc. connection types.
This is far from removing strategy.py, but it's a tiny start.
ansible_mitogen/connection.py:
* config_from_play_context() and config_from_host_vars() build up a
huge dictionary containing either more or less PlayContext contents,
or our best attempt at reconstructing a host's connection config
from its hostvars, where that config is not the current
WorkerProcess target.
They both produce the same format with the same keys, allowing
remaining code to have a single input format.
These dicts contain fields named after how Ansible refers to them,
e.g. "sudo_exe".
* _config_from_via() parses a basic connection specification like
"username@inventory_name" into one of the aforementioned dicts.
* _stack_from_config() produces a list of dicts describing the order
in which (Mitogen) connections should be established, such that each
element is proxied via= the previous element. The dicts produced by
this function use Mitogen keyword arguments, the former di.
These dicts contain fields named after how Mitogen refers to them,
e.g. "sudo_path".
* Pass the stack to ContextService, which is responsible for actual
setup of the full chain.
ansible_mitogen/services.py:
Teach get() to walk the supplied stack, establishing each connection
in turn, creating refounts for it before continuing.
TODO: refcounting is broken in a variety of cases.
This commit only uses it for the target.get_file() helper, which is only
used for transferring modules. The next commit wires it into the
Connection.transfer_file() API, which is the method the copy module
uses.
The module name comes from YAML via Jinja2.. it's always Unicode. Mixing
it into a temporary directory name produces a Unicode tempdir name,
which ends up in sys.argv via TemporaryArgv.
This is a partial fix, there are still at least 2 cases needing covered:
- In-progress connections must have CallError or similar sent to any
waiters
- Once connection delegation exists, it is possible for other worker
processes to be active (and in any step in the process), trying to
communicate with a context that we know can no longer be communicated
with. The solution to that isn't clear yet.
Additionally ensure root has /bin/bash shell in both Docker images.
And by "compatible" I mean "terrible". This does not implement async job
timeouts, but I'm not going to bother, upstream async implementation is
so buggy and inconsistent it resists even having its behaviour captured
in tests.
Now Connection.close() *must* be called in the worker, to ensure the
reference count for a context drops correctly.
Remove 'discriminator' for now, I'm not using it for testing any more
and it complicated this code.
This code is a car crash, it needs rewritten again. Ideally some/most of
this behaviour could live on services.DeduplicatingService somehow, but
I couldn't come up with a sensible design.
Elements of a with_items loop reuse one WorkerProcess to execute every
iteration, requiring us to reset Connection's idea of the connection on
each iteration, otherwise the tasks will erroneously execute in the
wrong context.
David Wilson