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.. _changelog:
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Release Notes
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=============
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.. raw:: html
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<style>
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div#release-notes h2 {
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border-bottom: 1px dotted #c0c0c0;
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margin-top: 40px;
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}
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</style>
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.. _known_issues:
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Known Issues
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------------
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Mitogen For Ansible
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~~~~~~~~~~~~~~~~~~~
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* The Ansible 2.7 `reboot
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<https://docs.ansible.com/ansible/latest/modules/reboot_module.html>`_ module
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may require a ``pre_reboot_delay`` on systemd hosts, as insufficient time
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exists for the reboot command's exit status to be reported before necessary
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processes are torn down.
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* On OS X when a SSH password is specified and the default connection type of
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``smart`` is used, Ansible may select the Paramiko plug-in rather than
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Mitogen. If you specify a password on OS X, ensure ``connection: ssh``
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appears in your playbook, ``ansible.cfg``, or as ``-c ssh`` on the
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command-line.
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* The ``raw`` action executes as a regular Mitogen connection, which requires
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Python on the target, precluding its use for installing Python. This will be
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addressed in a future 0.2 release. For now, simply mix Mitogen and vanilla
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Ansible strategies in your playbook:
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.. code-block:: yaml
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- hosts: web-servers
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strategy: linear
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tasks:
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- name: Install Python if necessary.
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raw: test -e /usr/bin/python || apt install -y python-minimal
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- hosts: web-servers
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strategy: mitogen_linear
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roles:
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- nginx
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- initech_app
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- y2k_fix
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.. * When running with ``-vvv``, log messages will be printed to the console
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*after* the Ansible run completes, as connection multiplexer shutdown only
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begins after Ansible exits. This is due to a lack of suitable shutdown hook
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in Ansible, and is fairly harmless, albeit cosmetically annoying. A future
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release may include a solution.
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.. * Configurations will break that rely on the `hashbang argument splitting
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behaviour <https://github.com/ansible/ansible/issues/15635>`_ of the
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``ansible_python_interpreter`` setting, contrary to the Ansible
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documentation. This will be addressed in a future 0.2 release.
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* Performance does not scale linearly with target count. This requires
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significant additional work, as major bottlenecks exist in the surrounding
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Ansible code. Performance-related bug reports for any scenario remain
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welcome with open arms.
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* Performance on Python 3 is significantly worse than on Python 2. While this
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has not yet been investigated, at least some of the regression appears to be
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part of the core library, and should therefore be straightforward to fix as
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part of 0.2.x.
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* *Module Replacer* style Ansible modules are not supported.
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* Actions are single-threaded for each `(host, user account)` combination,
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including actions that execute on the local machine. Playbooks may experience
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slowdown compared to vanilla Ansible if they employ long-running
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``local_action`` or ``delegate_to`` tasks delegating many target hosts to a
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single machine and user account.
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* Connection Delegation remains in preview and has bugs around how it infers
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connections. Connection establishment will remain single-threaded for the 0.2
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series, however connection inference bugs will be addressed in a future 0.2
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release.
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* Connection Delegation does not support automatic tunnelling of SSH-dependent
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actions, such as the ``synchronize`` module. This will be addressed in the
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0.3 series.
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Core Library
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~~~~~~~~~~~~
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* Serialization is still based on :mod:`pickle`. While there is high confidence
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remote code execution is impossible in Mitogen's configuration, an untrusted
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context may at least trigger disproportionately high memory usage injecting
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small messages (*"billion laughs attack"*). Replacement is an important
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future priority, but not critical for an initial release.
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* Child processes are not reliably reaped, leading to a pileup of zombie
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processes when a program makes many short-lived connections in a single
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invocation. This does not impact Mitogen for Ansible, however it limits the
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usefulness of the core library. A future 0.2 release will address it.
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* Some races remain around :class:`mitogen.core.Broker <Broker>` destruction,
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disconnection and corresponding file descriptor closure. These are only
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problematic in situations where child process reaping is also problematic.
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* The `fakessh` component does not shut down correctly and requires flow
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control added to the design. While minimal fixes are possible, due to the
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absence of flow control the original design is functionally incomplete.
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* The multi-threaded :ref:`service` remains in a state of design flux and
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should be considered obsolete, despite heavy use in Mitogen for Ansible. A
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future replacement may be integrated more tightly with, or entirely replace
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the RPC dispatcher on the main thread.
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* Documentation is in a state of disrepair. This will be improved over the 0.2
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series.
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v0.2.4 (2018-??-??)
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-------------------
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Mitogen for Ansible
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~~~~~~~~~~~~~~~~~~~
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Enhancements
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^^^^^^^^^^^^
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* `#76 <https://github.com/dw/mitogen/issues/76>`_,
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`#351 <https://github.com/dw/mitogen/issues/351>`_,
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`#352 <https://github.com/dw/mitogen/issues/352>`_: disconnect propagation
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has improved, allowing Ansible to cancel waits for responses from abruptly
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disconnected targets. This ensures a task will gracefully fail rather than
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hang, for example on network failure or EC2 instance maintenance.
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* `#369 <https://github.com/dw/mitogen/issues/369>`_: :meth:`Connection.reset`
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is implemented, allowing `meta: reset_connection
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<https://docs.ansible.com/ansible/latest/modules/meta_module.html>`_ to shut
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down the remote interpreter as documented, and improving support for the
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`reboot
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<https://docs.ansible.com/ansible/latest/modules/reboot_module.html>`_
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module.
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Fixes
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^^^^^
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* `#323 <https://github.com/dw/mitogen/issues/323>`_,
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`#333 <https://github.com/dw/mitogen/issues/333>`_: work around a Windows
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Subsystem for Linux bug that caused tracebacks to appear during shutdown.
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* `#334 <https://github.com/dw/mitogen/issues/334>`_: the SSH method
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tilde-expands private key paths using Ansible's logic. Previously the path
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was passed unmodified to SSH, which expanded it using :func:`pwd.getpwnam`.
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This differs from :func:`os.path.expanduser`, which uses the ``HOME``
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environment variable if it is set, causing behaviour to diverge when Ansible
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was invoked across user accounts via ``sudo``.
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* `#364 <https://github.com/dw/mitogen/issues/364>`_: file transfers from
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controllers running Python 2.7.2 or earlier could be interrupted due to a
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forking bug in the :mod:`tempfile` module.
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* `#370 <https://github.com/dw/mitogen/issues/370>`_: the Ansible
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`reboot <https://docs.ansible.com/ansible/latest/modules/reboot_module.html>`_
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module is supported.
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* `#373 <https://github.com/dw/mitogen/issues/373>`_: the LXC and LXD methods
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print a useful hint on failure, as no useful error is normally logged to the
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console by these tools.
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* `#391 <https://github.com/dw/mitogen/issues/391>`_: file transfer from 2.x
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controllers to 3.x targets was broken due to a regression caused by
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refactoring, and compounded by `#426
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<https://github.com/dw/mitogen/issues/426>`_.
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* `#400 <https://github.com/dw/mitogen/issues/400>`_: work around a threading
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bug in the AWX display callback when running with high verbosity setting.
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* `#409 <https://github.com/dw/mitogen/issues/409>`_: the setns method was
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silently broken due to missing tests. Basic coverage was added to prevent a
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recurrence.
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* `#409 <https://github.com/dw/mitogen/issues/409>`_: the LXC and LXD methods
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support ``mitogen_lxc_path`` and ``mitogen_lxc_attach_path`` variables to
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control the location of third pary utilities.
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* `#410 <https://github.com/dw/mitogen/issues/410>`_: the sudo method supports
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the SELinux ``--type`` and ``--role`` options.
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* `#420 <https://github.com/dw/mitogen/issues/420>`_: if a :class:`Connection`
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was constructed in the Ansible top-level process, for example while executing
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``meta: reset_connection``, resources could become undesirably shared in
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subsequent children.
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Core Library
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~~~~~~~~~~~~
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* `#76 <https://github.com/dw/mitogen/issues/76>`_: routing records the
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destination context IDs ever received on each stream, and when disconnection
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occurs, propagates :data:`mitogen.core.DEL_ROUTE` messages towards every
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stream that ever communicated with the disappearing peer, rather than simply
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towards parents.
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Conversations between nodes anywhere in the tree receive
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:data:`mitogen.core.DEL_ROUTE` when either participant disconnects, allowing
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receivers to wake with :class:`mitogen.core.ChannelError`, even when one
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participant is not a parent of the other.
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* `#109 <https://github.com/dw/mitogen/issues/109>`_,
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`57504ba6 <https://github.com/dw/mitogen/commit/57504ba6>`_: newer Python 3
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releases explicitly populate :data:`sys.meta_path` with importer internals,
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causing Mitogen to install itself at the end of the importer chain rather
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than the front.
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* `#387 <https://github.com/dw/mitogen/issues/387>`_,
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`#413 <https://github.com/dw/mitogen/issues/413>`_: dead messages include an
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optional reason in their body. This is used to cause
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:class:`mitogen.core.ChannelError` to report far more useful diagnostics at
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the point the error occurs that previously would have been buried in debug
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log output from an unrelated context.
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* `#405 <https://github.com/dw/mitogen/issues/405>`_: if an oversized message
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is rejected, and it has a ``reply_to`` set, a dead message is returned to the
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sender. This ensures function calls exceeding the configured maximum size
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crash rather than hang.
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* `#406 <https://github.com/dw/mitogen/issues/406>`_:
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:class:`mitogen.core.Broker` did not call :meth:`mitogen.core.Poller.close`
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during shutdown, leaking the underlying poller FD in masters and parents.
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* `#406 <https://github.com/dw/mitogen/issues/406>`_: connections could leak
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FDs when a child process failed to start.
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* `#288 <https://github.com/dw/mitogen/issues/288>`_,
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`#406 <https://github.com/dw/mitogen/issues/406>`_,
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`#417 <https://github.com/dw/mitogen/issues/417>`_: connections could leave
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FD wrapper objects that had not been closed lying around to be closed during
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garbage collection, causing reused FD numbers to be closed at random moments.
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* `#411 <https://github.com/dw/mitogen/issues/411>`_: the SSH method typed
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"``y``" rather than the requisite "``yes``" when `check_host_keys="accept"`
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was configured. This would lead to connection timeouts due to the hung
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response.
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* `#416 <https://github.com/dw/mitogen/issues/416>`_: around 1.4KiB of memory
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was leaked on every RPC, due to a list of strong references keeping alive any
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handler ever registered for disconnect notification.
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* `#418 <https://github.com/dw/mitogen/issues/418>`_: the
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:func:`mitogen.parent.iter_read` helper would leak poller FDs, because
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execution of its :keyword:`finally` block was delayed on Python 3. Now
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callers explicitly close the generator when finished.
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* `#421 <https://github.com/dw/mitogen/issues/421>`_: the fork method could
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fail to start if :data:`sys.stdout` was opened in block buffered mode, and
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buffered data was pending in the parent prior to fork.
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* `16ca111e <https://github.com/dw/mitogen/commit/16ca111e>`_: handle OpenSSH
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7.5 permission denied prompts when ``~/.ssh/config`` rewrites are present.
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* `9ec360c2 <https://github.com/dw/mitogen/commit/9ec360c2>`_: a new
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:meth:`mitogen.core.Broker.defer_sync` utility function is provided.
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Thanks!
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~~~~~~~
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Mitogen would not be possible without the support of users. A huge thanks for
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bug reports, testing, features and fixes in this release contributed by
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`Berend De Schouwer <https://github.com/berenddeschouwer>`_,
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`Brian Candler <https://github.com/candlerb>`_,
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`Duane Zamrok <https://github.com/dewthefifth>`_,
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`Guy Knights <https://github.com/knightsg>`_,
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`Jiří Vávra <https://github.com/Houbovo>`_,
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`Jonathan Rosser <https://github.com/jrosser>`_,
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`Josh Smift <https://github.com/jbscare>`_,
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`Mehdi <https://github.com/mehdisat7>`_, and
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`Mohammed Naser <https://github.com/mnaser/>`_.
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v0.2.3 (2018-10-23)
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-------------------
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Mitogen for Ansible
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~~~~~~~~~~~~~~~~~~~
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Enhancements
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^^^^^^^^^^^^
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|
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* `#315 <https://github.com/dw/mitogen/pull/315>`_,
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`#392 <https://github.com/dw/mitogen/issues/392>`_: Ansible 2.6 and 2.7 are
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supported.
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* `#321 <https://github.com/dw/mitogen/issues/321>`_,
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`#336 <https://github.com/dw/mitogen/issues/336>`_: temporary file handling
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was simplified, undoing earlier damage caused by compatibility fixes,
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improving 2.6 compatibility, and avoiding two network roundtrips for every
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related action
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(`assemble <http://docs.ansible.com/ansible/latest/modules/assemble_module.html>`_,
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`aws_s3 <http://docs.ansible.com/ansible/latest/modules/aws_s3_module.html>`_,
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`copy <http://docs.ansible.com/ansible/latest/modules/copy_module.html>`_,
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`patch <http://docs.ansible.com/ansible/latest/modules/patch_module.html>`_,
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`script <http://docs.ansible.com/ansible/latest/modules/script_module.html>`_,
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`template <http://docs.ansible.com/ansible/latest/modules/template_module.html>`_,
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`unarchive <http://docs.ansible.com/ansible/latest/modules/unarchive_module.html>`_,
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`uri <http://docs.ansible.com/ansible/latest/modules/uri_module.html>`_). See
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:ref:`ansible_tempfiles` for a complete description.
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* `#376 <https://github.com/dw/mitogen/pull/376>`_,
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`#377 <https://github.com/dw/mitogen/pull/377>`_: the ``kubectl`` connection
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type is now supported. Contributed by Yannig Perré.
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* `084c0ac0 <https://github.com/dw/mitogen/commit/084c0ac0>`_: avoid a
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roundtrip in
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`copy <http://docs.ansible.com/ansible/latest/modules/copy_module.html>`_ and
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`template <http://docs.ansible.com/ansible/latest/modules/template_module.html>`_
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due to an unfortunate default.
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* `7458dfae <https://github.com/dw/mitogen/commit/7458dfae>`_: avoid a
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roundtrip when transferring files smaller than 124KiB. Copy and template
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actions are now 2-RTT, reducing runtime for a 20-iteration template loop over
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a 250 ms link from 30 seconds to 10 seconds compared to v0.2.2, down from 120
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seconds compared to vanilla.
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* `#337 <https://github.com/dw/mitogen/issues/337>`_: To avoid a scaling
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limitation, a PTY is no longer allocated for an SSH connection unless the
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configuration specifies a password.
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* `d62e6e2a <https://github.com/dw/mitogen/commit/d62e6e2a>`_: many-target
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runs executed the dependency scanner redundantly due to missing
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synchronization, wasting significant runtime in the connection multiplexer.
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In one case work was reduced by 95%, which may manifest as faster runs.
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* `5189408e <https://github.com/dw/mitogen/commit/5189408e>`_: threads are
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cooperatively scheduled, minimizing `GIL
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<https://en.wikipedia.org/wiki/Global_interpreter_lock>`_ contention, and
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reducing context switching by around 90%. This manifests as an overall
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improvement, but is easily noticeable on short many-target runs, where
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startup overhead dominates runtime.
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* The `faulthandler <https://faulthandler.readthedocs.io/>`_ module is
|
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automatically activated if it is installed, simplifying debugging of hangs.
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See :ref:`diagnosing-hangs` for details.
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* The ``MITOGEN_DUMP_THREAD_STACKS`` environment variable's value now indicates
|
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the number of seconds between stack dumps. See :ref:`diagnosing-hangs` for
|
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details.
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Fixes
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^^^^^
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* `#251 <https://github.com/dw/mitogen/issues/251>`_,
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`#340 <https://github.com/dw/mitogen/issues/340>`_: Connection Delegation
|
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could establish connections to the wrong target when ``delegate_to:`` is
|
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present.
|
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* `#291 <https://github.com/dw/mitogen/issues/291>`_: when Mitogen had
|
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previously been installed using ``pip`` or ``setuptools``, the globally
|
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installed version could conflict with a newer version bundled with an
|
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extension that had been installed using the documented steps. Now the bundled
|
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library always overrides over any system-installed copy.
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* `#324 <https://github.com/dw/mitogen/issues/324>`_: plays with a
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`custom module_utils <https://docs.ansible.com/ansible/latest/reference_appendices/config.html#default-module-utils-path>`_
|
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would fail due to fallout from the Python 3 port and related tests being
|
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disabled.
|
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* `#331 <https://github.com/dw/mitogen/issues/331>`_: the connection
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multiplexer subprocess always exits before the main Ansible process, ensuring
|
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logs generated by it do not overwrite the user's prompt when ``-vvv`` is
|
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enabled.
|
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|
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* `#332 <https://github.com/dw/mitogen/issues/332>`_: support a new
|
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:func:`sys.excepthook`-based module exit mechanism added in Ansible 2.6.
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* `#338 <https://github.com/dw/mitogen/issues/338>`_: compatibility: changes to
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``/etc/environment`` and ``~/.pam_environment`` made by a task are reflected
|
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in the runtime environment of subsequent tasks. See
|
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:ref:`ansible_process_env` for a complete description.
|
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|
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* `#343 <https://github.com/dw/mitogen/issues/343>`_: the sudo ``--login``
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option is supported.
|
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* `#344 <https://github.com/dw/mitogen/issues/344>`_: connections no longer
|
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fail when the controller's login username contains slashes.
|
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* `#345 <https://github.com/dw/mitogen/issues/345>`_: the ``IdentitiesOnly
|
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yes`` option is no longer supplied to OpenSSH by default, better matching
|
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Ansible's behaviour.
|
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* `#355 <https://github.com/dw/mitogen/issues/355>`_: tasks configured to run
|
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in an isolated forked subprocess were forked from the wrong parent context.
|
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This meant built-in modules overridden via a custom ``module_utils`` search
|
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path may not have had any effect.
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* `#362 <https://github.com/dw/mitogen/issues/362>`_: to work around a slow
|
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algorithm in the :mod:`subprocess` module, the maximum number of open files
|
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in processes running on the target is capped to 512, reducing the work
|
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required to start a subprocess by >2000x in default CentOS configurations.
|
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* `#397 <https://github.com/dw/mitogen/issues/397>`_: recent Mitogen master
|
|
versions could fail to clean up temporary directories in a number of
|
|
circumstances, and newer Ansibles moved to using :mod:`atexit` to effect
|
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temporary directory cleanup in some circumstances.
|
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|
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* `b9112a9c <https://github.com/dw/mitogen/commit/b9112a9c>`_,
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`2c287801 <https://github.com/dw/mitogen/commit/2c287801>`_: OpenSSH 7.5
|
|
permission denied prompts are now recognized. Contributed by Alex Willmer.
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|
|
* A missing check caused an exception traceback to appear when using the
|
|
``ansible`` command-line tool with a missing or misspelled module name.
|
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|
|
* Ansible since >=2.7 began importing :mod:`__main__` from
|
|
:mod:`ansible.module_utils.basic`, causing an error during execution, due to
|
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the controller being configured to refuse network imports outside the
|
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``ansible.*`` namespace. Update the target implementation to construct a stub
|
|
:mod:`__main__` module to satisfy the otherwise seemingly vestigial import.
|
|
|
|
|
|
Core Library
|
|
~~~~~~~~~~~~
|
|
|
|
* A new :class:`mitogen.parent.CallChain` class abstracts safe pipelining of
|
|
related function calls to a target context, cancelling the chain if an
|
|
exception occurs.
|
|
|
|
* `#305 <https://github.com/dw/mitogen/issues/305>`_: fix a long-standing minor
|
|
race relating to the logging framework, where *no route for Message..*
|
|
would frequently appear during startup.
|
|
|
|
* `#313 <https://github.com/dw/mitogen/issues/313>`_:
|
|
:meth:`mitogen.parent.Context.call` was documented as capable of accepting
|
|
static methods. While possible on Python 2.x the result is ugly, and in every
|
|
case it should be trivial to replace with a classmethod. The documentation
|
|
was fixed.
|
|
|
|
* `#337 <https://github.com/dw/mitogen/issues/337>`_: to avoid a scaling
|
|
limitation, a PTY is no longer allocated for each OpenSSH client if it can be
|
|
avoided. PTYs are only allocated if a password is supplied, or when
|
|
`host_key_checking=accept`. This is since Linux has a default of 4096 PTYs
|
|
(``kernel.pty.max``), while OS X has a default of 127 and an absolute maximum
|
|
of 999 (``kern.tty.ptmx_max``).
|
|
|
|
* `#339 <https://github.com/dw/mitogen/issues/339>`_: the LXD connection method
|
|
was erroneously executing LXC Classic commands.
|
|
|
|
* `#345 <https://github.com/dw/mitogen/issues/345>`_: the SSH connection method
|
|
allows optionally disabling ``IdentitiesOnly yes``.
|
|
|
|
* `#356 <https://github.com/dw/mitogen/issues/356>`_: if the master Python
|
|
process does not have :data:`sys.executable` set, the default Python
|
|
interpreter used for new children on the local machine defaults to
|
|
``"/usr/bin/python"``.
|
|
|
|
* `#366 <https://github.com/dw/mitogen/issues/366>`_,
|
|
`#380 <https://github.com/dw/mitogen/issues/380>`_: attempts by children to
|
|
import :mod:`__main__` where the main program module lacks an execution guard
|
|
are refused, and an error is logged. This prevents a common and highly
|
|
confusing error when prototyping new scripts.
|
|
|
|
* `#371 <https://github.com/dw/mitogen/pull/371>`_: the LXC connection method
|
|
uses a more compatible method to establish an non-interactive session.
|
|
Contributed by Brian Candler.
|
|
|
|
* `af2ded66 <https://github.com/dw/mitogen/commit/af2ded66>`_: add
|
|
:func:`mitogen.fork.on_fork` to allow non-Mitogen managed process forks to
|
|
clean up Mitogen resources in the child.
|
|
|
|
* `d6784242 <https://github.com/dw/mitogen/commit/d6784242>`_: the setns method
|
|
always resets ``HOME``, ``SHELL``, ``LOGNAME`` and ``USER`` environment
|
|
variables to an account in the target container, defaulting to ``root``.
|
|
|
|
* `830966bf <https://github.com/dw/mitogen/commit/830966bf>`_: the UNIX
|
|
listener no longer crashes if the peer process disappears in the middle of
|
|
connection setup.
|
|
|
|
|
|
Thanks!
|
|
~~~~~~~
|
|
|
|
Mitogen would not be possible without the support of users. A huge thanks for
|
|
bug reports, testing, features and fixes in this release contributed by
|
|
`Alex Russu <https://github.com/alexrussu>`_,
|
|
`Alex Willmer <https://github.com/moreati>`_,
|
|
`atoom <https://github.com/atoom>`_,
|
|
`Berend De Schouwer <https://github.com/berenddeschouwer>`_,
|
|
`Brian Candler <https://github.com/candlerb>`_,
|
|
`Dan Quackenbush <https://github.com/danquack>`_,
|
|
`dsgnr <https://github.com/dsgnr>`_,
|
|
`Jesse London <https://github.com/jesteria>`_,
|
|
`John McGrath <https://github.com/jmcgrath207>`_,
|
|
`Jonathan Rosser <https://github.com/jrosser>`_,
|
|
`Josh Smift <https://github.com/jbscare>`_,
|
|
`Luca Nunzi <https://github.com/0xlc>`_,
|
|
`Orion Poplawski <https://github.com/opoplawski>`_,
|
|
`Peter V. Saveliev <https://github.com/svinota>`_,
|
|
`Pierre-Henry Muller <https://github.com/pierrehenrymuller>`_,
|
|
`Pierre-Louis Bonicoli <https://github.com/jesteria>`_,
|
|
`Prateek Jain <https://github.com/prateekj201>`_,
|
|
`RedheatWei <https://github.com/RedheatWei>`_,
|
|
`Rick Box <https://github.com/boxrick>`_,
|
|
`nikitakazantsev12 <https://github.com/nikitakazantsev12>`_,
|
|
`Tawana Musewe <https://github.com/tbtmuse>`_,
|
|
`Timo Beckers <https://github.com/ti-mo>`_, and
|
|
`Yannig Perré <https://github.com/yannig>`_.
|
|
|
|
|
|
v0.2.2 (2018-07-26)
|
|
-------------------
|
|
|
|
Mitogen for Ansible
|
|
~~~~~~~~~~~~~~~~~~~
|
|
|
|
* `#291 <https://github.com/dw/mitogen/issues/291>`_: ``ansible_*_interpreter``
|
|
variables are parsed using a restrictive shell-like syntax, supporting a
|
|
common idiom where ``ansible_python_interpreter`` is set to ``/usr/bin/env
|
|
python``.
|
|
|
|
* `#299 <https://github.com/dw/mitogen/issues/299>`_: fix the ``network_cli``
|
|
connection type when the Mitogen strategy is active. Mitogen cannot help
|
|
network device connections, however it should still be possible to use device
|
|
connections while Mitogen is active.
|
|
|
|
* `#301 <https://github.com/dw/mitogen/pull/301>`_: variables like ``$HOME`` in
|
|
the ``remote_tmp`` setting are evaluated correctly.
|
|
|
|
* `#303 <https://github.com/dw/mitogen/pull/303>`_: the :ref:`doas` become method
|
|
is supported. Contributed by `Mike Walker
|
|
<https://github.com/napkindrawing>`_.
|
|
|
|
* `#309 <https://github.com/dw/mitogen/issues/309>`_: fix a regression to
|
|
process environment cleanup, caused by the change in v0.2.1 to run local
|
|
tasks with the correct environment.
|
|
|
|
* `#317 <https://github.com/dw/mitogen/issues/317>`_: respect the verbosity
|
|
setting when writing to Ansible's ``log_path``, if it is enabled. Child log
|
|
filtering was also incorrect, causing the master to needlessly wake many
|
|
times. This nets a 3.5% runtime improvement running against the local
|
|
machine.
|
|
|
|
* The ``mitogen_ssh_debug_level`` variable is supported, permitting SSH debug
|
|
output to be included in Mitogen's ``-vvv`` output when both are specified.
|
|
|
|
|
|
Core Library
|
|
~~~~~~~~~~~~
|
|
|
|
* `#291 <https://github.com/dw/mitogen/issues/291>`_: the ``python_path``
|
|
parameter may specify an argument vector prefix rather than a string program
|
|
path.
|
|
|
|
* `#300 <https://github.com/dw/mitogen/issues/300>`_: the broker could crash on
|
|
OS X during shutdown due to scheduled `kqueue
|
|
<https://www.freebsd.org/cgi/man.cgi?query=kevent>`_ filter changes for
|
|
descriptors that were closed before the IO loop resumes. As a temporary
|
|
workaround, kqueue's bulk change feature is not used.
|
|
|
|
* `#303 <https://github.com/dw/mitogen/pull/303>`_: the :ref:`doas` become method
|
|
is now supported. Contributed by `Mike Walker
|
|
<https://github.com/napkindrawing>`_.
|
|
|
|
* `#307 <https://github.com/dw/mitogen/issues/307>`_: SSH login banner output
|
|
containing the word 'password' is no longer confused for a password prompt.
|
|
|
|
* `#319 <https://github.com/dw/mitogen/issues/319>`_: SSH connections would
|
|
fail immediately on Windows Subsystem for Linux, due to use of `TCSAFLUSH`
|
|
with :func:`termios.tcsetattr`. The flag is omitted if WSL is detected.
|
|
|
|
* `#320 <https://github.com/dw/mitogen/issues/320>`_: The OS X poller
|
|
could spuriously wake up due to ignoring an error bit set on events returned
|
|
by the kernel, manifesting as a failure to read from an unrelated descriptor.
|
|
|
|
* `#342 <https://github.com/dw/mitogen/issues/342>`_: The ``network_cli``
|
|
connection type would fail due to a missing internal SSH plugin method.
|
|
|
|
* Standard IO forwarding accidentally configured the replacement ``stdout`` and
|
|
``stderr`` write descriptors as non-blocking, causing subprocesses that
|
|
generate more output than kernel buffer space existed to throw errors. The
|
|
write ends are now configured as blocking.
|
|
|
|
* When :func:`mitogen.core.enable_profiling` is active, :mod:`mitogen.service`
|
|
threads are profiled just like other threads.
|
|
|
|
* The ``ssh_debug_level`` parameter is supported, permitting SSH debug output
|
|
to be redirected to a Mitogen logger when specified.
|
|
|
|
* Debug logs containing command lines are printed with the minimal quoting and
|
|
escaping required.
|
|
|
|
|
|
Thanks!
|
|
~~~~~~~
|
|
|
|
Mitogen would not be possible without the support of users. A huge thanks for
|
|
the bug reports and pull requests in this release contributed by
|
|
`Alex Russu <https://github.com/alexrussu>`_,
|
|
`Andy Freeland <https://github.com/rouge8>`_,
|
|
`Ayaz Ahmed Khan <https://github.com/ayaz>`_,
|
|
`Colin McCarthy <https://github.com/colin-mccarthy>`_,
|
|
`Dan Quackenbush <https://github.com/danquack>`_,
|
|
`Duane Zamrok <https://github.com/dewthefifth>`_,
|
|
`Gonzalo Servat <https://github.com/gservat>`_,
|
|
`Guy Knights <https://github.com/knightsg>`_,
|
|
`Josh Smift <https://github.com/jbscare>`_,
|
|
`Mark Janssen <https://github.com/sigio>`_,
|
|
`Mike Walker <https://github.com/napkindrawing>`_,
|
|
`Orion Poplawski <https://github.com/opoplawski>`_,
|
|
`falbanese <https://github.com/falbanese>`_,
|
|
`Tawana Musewe <https://github.com/tbtmuse>`_, and
|
|
`Zach Swanson <https://github.com/zswanson>`_.
|
|
|
|
|
|
v0.2.1 (2018-07-10)
|
|
-------------------
|
|
|
|
Mitogen for Ansible
|
|
~~~~~~~~~~~~~~~~~~~
|
|
|
|
* `#297 <https://github.com/dw/mitogen/issues/297>`_: compatibility: local
|
|
actions set their working directory to that of their defining playbook, and
|
|
inherit a process environment as if they were executed as a subprocess of the
|
|
forked task worker.
|
|
|
|
|
|
v0.2.0 (2018-07-09)
|
|
-------------------
|
|
|
|
Mitogen 0.2.x is the inaugural feature-frozen branch eligible for fixes only,
|
|
except for problem areas listed as in-scope below. While stable from a
|
|
development perspective, it should still be considered "beta" at least for the
|
|
initial releases.
|
|
|
|
**In Scope**
|
|
|
|
* Python 3.x performance improvements
|
|
* Subprocess reaping improvements
|
|
* Major documentation improvements
|
|
* PyPI/packaging improvements
|
|
* Test suite improvements
|
|
* Replacement CI system to handle every supported OS
|
|
* Minor deviations from vanilla Ansible behaviour
|
|
* Ansible ``raw`` action support
|
|
|
|
The goal is a *tick/tock* model where even-numbered series are a maturation of
|
|
the previous unstable series, and unstable series are released on PyPI with
|
|
``--pre`` enabled. The API and user visible behaviour should remain unchanged
|
|
within a stable series.
|
|
|
|
|
|
Mitogen for Ansible
|
|
~~~~~~~~~~~~~~~~~~~
|
|
|
|
* Support for Ansible 2.3 - 2.7.x and any mixture of Python 2.6, 2.7 or 3.6 on
|
|
controller and target nodes.
|
|
|
|
* Drop-in support for many Ansible connection types.
|
|
|
|
* Preview of Connection Delegation feature.
|
|
|
|
* Built-in file transfer compatible with connection delegation.
|
|
|
|
|
|
Core Library
|
|
~~~~~~~~~~~~
|
|
|
|
* Synchronous connection establishment via OpenSSH, sudo, su, Docker, LXC and
|
|
FreeBSD Jails, local subprocesses and :func:`os.fork`. Parallel connection
|
|
setup is possible using multiple threads. Connections may be used from one or
|
|
many threads after establishment.
|
|
|
|
* UNIX masters and children, with Linux, MacOS, FreeBSD, NetBSD, OpenBSD and
|
|
Windows Subsystem for Linux explicitly supported.
|
|
|
|
* Automatic tests covering Python 2.6, 2.7 and 3.6 on Linux only.
|