Ansible excessively checks the file system for the potential presence of
`group_vars` and `host_vars` files.
For large numbers of groups this leads to combinatorial performance
issues.
This commit generates a set of group_vars and host_vars filenames using
`os.listdir()` in every possible location and then checks against the sets
before making a stat of the file system.
Also included in this commit is caching of the base directory lookup
for the inventory.
This makes it possible to use anything other than a list (e.g., a
tuple, or dict.keys() in py3k) for argument_spec choices. It also
improves the error messages if you don't use a list type.
Child blocks (whether nested or via includes) don't get a copy of the
dependency chain, so the above method should be used to ensure the block
looks at its parents dep chain.
Fixes#15996
* readd the service action plugin, was removed cause it created unexpected fact gathering and there are no split service plugins that would make this useful (yet)
Revert "removed action plugin as service facts and separate modules don't work yet and this forces gathering facts"
This reverts commit 7368030651.
* now only does minimal fact gathering
This class can be used by F5 modules for raising exceptions.
This should be used to handle known errors and raise them so
that they can be printed in the fail_json method.
The common Exception class built-in should not be used because
it hides tracebacks that are necessary to have when debugging
problems with the module.
* Catch DistributionNotFound when pycrypto is absent
On Solaris 11, module `pkg_resources` throws `DistributionNotFound` on import if `cryptography` is installed but `pycrypto` is not. This change causes that situation to be handled gracefully.
I'm not using Paramiko or Vault, so I my understanding is that I don't
need `pycrpto`. I could install `pycrypto` to make the error go away, but:
- The latest released version of `pycrypto` doesn't build cleanly on Solaris (https://github.com/dlitz/pycrypto/issues/184).
- Solaris includes an old version of GMP that triggers warnings every time Ansible runs (https://github.com/ansible/ansible/issues/6941). I notice that I can silence these warnings with `system_warnings` in `ansible.cfg`, but not installing `pycrypto` seems like a safer solution.
* Ignore only `pkg_resources.DistributionNotFound`, not other exceptions.
With some earlier changes, continuing to forward failed hosts on
to the iterator with each TQM run() call was causing plays with
max_fail_pct set to fail, as hosts which failed in previous plays
were counting those old failures against the % calculation.
Also changed the linear strategy's calculation to use the internal
failed list, rather than the iterator, as this now represents the
hosts failed during the current run only.
This change makes it so we know when it is safe to get rid of the module
(when we stop supporting python2.4) and makes it easier for us to find
code that is using the functions in there to update.
If needed, we'll create a pycompat26 and pycompat27 as well. These
files are for functions that are needed on that python version to write
portable code. So python-2.4 compatible modules may need code in
pycompat24, python26+ modules may need code in pycompat26, etc. If
a function is needed in multiple python versions, we should implement it
in an internal common file and use import to put it in the namespace for
each pycompatXY module.
As noted in the comment, the TQM may be used for more than one play. As such,
after creating the new PlayIterator object it is necessary to mark any failed
hosts from previous calls to run() as failed in the iterator, so they are
properly skipped during any future calls to run().
