The OpenShift installer modifies /etc/resolv.conf then tests the new
resolver configuration, however, there was no mechanism to reload
resolv.conf in our reuseable interpreter.
https://github.com/openshift/openshift-ansible/blob/release-3.9/roles/openshift_web_console/tasks/install.yml#L137
This inserts an explicit call to res_init() for every new style
invocation, with an approximate cost of ~1usec on Linux since glibc
verifies resolv.conf has changed before reloading it.
There is little to be done for users of the thread-safe resolver APIs,
their state is hidden from us. If bugs like that manifest, whack-a-mole
style 'del sys.modules[thatmod]' patches may suffice.
The module the connection class is now loaded as is
"ansible.plugins.connection.mitogen_ssh", etc., which breaks the test.
Instead, check if the connection is an instance of the base Connection
class.
While adding support for non-new style module types, NewStyleRunner
began writing modules to a temporary file, and sys.argv was patched to
actually include the script filename. The argv change was never required
to fix any particular bug, and a search of the standard modules reveals
no argv users. Update argv[0] to be '', like an interactive interpreter
would have.
While fixing #210, new style runner began setting __file__ to the
temporary file path in order to allow apt.py to discover the Ansiballz
temporary directory. 5 out of 1,516 standard modules follow this
pattern, but in each case, none actually attempt to access __file__,
they just call dirname on it. Therefore do not write the contents of
file, simply set it to the path as it would exist, within a real
temporary directory.
Finally move temporary directory creation out of runner and into target.
Now a single directory exists for the duration of a run, and is emptied
by runner.py as necessary after each task invocation.
This could be further extended to stop rewriting non-new-style modules
in a with_items loop, but that's another step.
Finally the last bullet point in the documentation almost isn't a lie
again.
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.
David Wilson