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Merge pull request #3041 from chrismeyersfsu/runnerpy3

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ansible-runner integration

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docs/ansible_runner_integration.md Normal file
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## Ansible Runner Integration Overview
Much of the code in AWX around ansible and ansible-playbook invocation interacting has been removed and put into the project ansible-runner. AWX now calls out to ansible-runner to invoke ansible and ansible-playbook.
### Lifecycle
In AWX, a task of a certain job type is kicked off (i.e. RunJob, RunProjectUpdate, RunInventoryUpdate, etc) in tasks.py. A temp directory is build to house ansible-runner parameters (i.e. envvars, cmdline, extravars, etc.). The temp directory is filled with the various concepts in AWX (i.e. ssh keys, extra varsk, etc.). The code then builds a set of parameters to be passed to the ansible-runner python module interface, `ansible-runner.interface.run()`. This is where AWX passes control to ansible-runner. Feedback is gathered by AWX via callbacks and handlers passed in.
The callbacks and handlers are:
* event_handler: Called each time a new event is created in ansible runner. AWX will disptach the event to rabbitmq to be processed on the other end by the callback receiver.
* cancel_callback: Called periodically by ansible runner. This is so that AWX can inform ansible runner if the job should be canceled or not.
* finished_callback: Called once by ansible-runner to denote that the process that was asked to run is finished. AWX will construct the special control event, `EOF`, with an associated total number of events that it observed.
* status_handler: Called by ansible-runner as the process transitions state internally. AWX uses the `starting` status to know that ansible-runner has made all of its decisions around the process that it will launch. AWX gathers and associates these decisions with the Job for historical observation.
### Debugging
If you want to debug ansible-runner then set `AWX_CLEANUP_PATHS=False`, run a job, observe the job's `AWX_PRIVATE_DATA_DIR` property, and go the node where the job was executed and inspect that directory.
If you want to debug the process that ansible-runner invoked (i.e. ansible or ansible-playbook) then observe the job's job_env, job_cwd, and job_args parameters.

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docs/custom_virtualenvs.md
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@@ -63,9 +63,6 @@ index aa8b304..eb05f91 100644
+ virtualenv $(VENV_BASE)/my-custom-env
+ $(VENV_BASE)/my-custom-env/bin/pip install python-memcached psutil
+
requirements_isolated:
if [ ! -d "$(VENV_BASE)/awx" ]; then \
virtualenv --system-site-packages $(VENV_BASE)/awx && \
diff --git a/installer/image_build/templates/Dockerfile.j2 b/installer/image_build/templates/Dockerfile.j2
index d69e2c9..a08bae5 100644
--- a/installer/image_build/templates/Dockerfile.j2

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docs/licenses/ansible-runner.txt Normal file
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2
docs/process_isolation.md
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@@ -4,6 +4,8 @@ In older version of Ansible Tower we used a system called `proot` to isolate tow
For Tower 3.1 and later we have switched to using `bubblewrap` which is a much lighter weight and maintained process isolation system.
Tower 3.5 forward uses the process isolation feature in ansible runner to achieve process isolation.
### Activating Process Isolation
By default `bubblewrap` is enabled, this can be turned off via Tower Config or from a tower settings file: