1fe67f9 introduced retries to the ssh connection put file and fetch
file. Unfortunately, that change broke the smart transport because it
started raising exceptions instead of returning from _run(). This
breakage is documented in #23711.
An attempt to fix it was made at #23717 but the first attempt was
objected to as needing to touch too much code. The second attmept was
objected to as smart was forced to encapsulate retries (thus retrying
a sftp "rety" times before trying scp "retry" times and then finally
moving onto piped). This third attempt has retries encapsulate smart.
So each sub-transport is tried once and if all three fail, another retry
attempt is made which tries each of the three again.
Fixes#23711Fixes#23717
* test/: PEP8 compliancy
- Make PEP8 compliant
* Python3 chokes on casting int to bytes (#24952)
But if we tell the formatter that the var is a number, it works
Ansible will now automatically retry a connection if SSH returns an error:
mux_client_hello_exchange: write packet: Broken pipe
This is probably a bug in SSH, but because it's safe to retry this
connection there is no need for Ansible to fail because of it.
* Update module_utils.six to latest
We've been held back on the version of six we could use on the module
side to 1.4.x because of python-2.4 compatibility. Now that our minimum
is Python-2.6, we can update to the latest version of six in
module_utils and get rid of the second copy in lib/ansible/compat.
* Move retry logic into _ssh_retry decorator, and apply to exec_command, put_file and fetch_file
* Update tests to reflect change
* Move _ssh_retry to _run, and update tests to reflect
* piped should use exec_command instead of removed _exec_command
* Rework tests to support selectors instead of select.select
At the moment, this change will use EPoll on Linux, KQueue on *BSDs,
etc, so it should alleviate problems with too many open file
descriptors.
* Bundle a copy of selectors2 so that we have the selectors API everywhere.
* Add licensing information to selectors2 file so it's clear what the
licensing terms and conditions are.
* Exclude the bundled copy of selectors2 from our boilerplate code-smell test
* Rewrite ssh_run tests to attempt to work around problem with mocking
select on shippable
Fixes#14143
* Replace pipes.quote for shlex_quote
* More migration of pipes.quote to shlex_quote
Note that we cannot yet move module code over. Modules have six-1.4
bundled which does not have shlex_quote. This shouldn't be a problem as
the function is still importable from pipes.quote. It's just that this
has become an implementation detail that makes us want to import from
shlex instead.
Once we get rid of the python2.4 dependency we can update to a newer
version of bundled six module-side and then we're free to use
shlex_quote everywhere.
