The environment variable DISTRO is used to set the target Docker image
used when running the Mitogen unit tests. DISTROS is used for the
Ansible integration tests. VER sets the version of Ansible that is
installed on the controller.
When MODE=Mitogen
- there is no need to set VER, because nothing that installs Ansible
- it does not make sense to set DISTROS.
CALLBACK_VERSION et al are documented as required in
https://docs.ansible.com/ansible/2.10/dev_guide/developing_plugins.html#callback-plugins.
The need for document_fragment is noted in
cfa8075537/lib/ansible/plugins/callback/default.py (L28-L32)Fixes#758
This addresses the following error, seen while running
`ansible_tests.py`.
```
TASK [Gathering Facts gather_timeout=10, gather_subset=['all']]
****************
task path:
/home/alex/src/mitogen/tests/ansible/regression/issue_109__target_has_old_ansible_installed.yml:4
[WARNING]: Failure using method (v2_runner_on_start) in callback plugin
(<ansible.plugins.callback.nice_stdout.CallbackModule object at
0x7f76b3dad090>): 'show_per_host_start'
Callback Exception:
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/executor/task_queue_manager.py",
line 372, in send_callback
method(*new_args, **kwargs)
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/plugins/callback/default.py",
line 240, in v2_runner_on_start
if self.get_option('show_per_host_start'):
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/plugins/callback/__init__.py",
line 91, in get_option
return self._plugin_options[k]
Callback Exception:
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/executor/task_queue_manager.py",
line 372, in send_callback
method(*new_args, **kwargs)
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/plugins/callback/default.py",
line 240, in v2_runner_on_start
if self.get_option('show_per_host_start'):
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/plugins/callback/__init__.py",
line 91, in get_option
return self._plugin_options[k]
[task 339882] 00:00:08.172036 D ansible_mitogen.affinity: CPU mask for
WorkerProcess: 0x000004
Callback Exception:
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/executor/task_queue_manager.py",
line 372, in send_callback
method(*new_args, **kwargs)
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/plugins/callback/default.py",
line 240, in v2_runner_on_start
if self.get_option('show_per_host_start'):
File
"/home/alex/src/mitogen/.tox/py27-ansible2.10/lib/python2.7/site-packages/ansible/plugins/callback/__init__.py",
line 91, in get_option
return self._plugin_options[k]
```
David Wilson