[openstack-dev] [Fuel][Plugins] Tasks ordering between plugins

Simon Pasquier spasquier at mirantis.com
Wed Jan 27 13:44:49 UTC 2016


I see that tasks.yaml is going to be deprecated in the future MOS versions
[1]. I've got one question regarding the ordering of tasks between
different plugins.
With tasks.yaml, it was possible to coordinate the execution of tasks
between plugins without prior knowledge of which plugins were installed [2].
For example, lets say we have 2 plugins: A and B. The plugins may or may
not be installed in the same environment and the tasks execution should be:
1. Run task X for plugin A (if installed).
2. Run task Y for plugin B (if installed).
3. Run task Z for plugin A (if installed).

Right now, we can set task priorities like:

# tasks.yaml for plugin A
- role: ['*']
  stage: post_deployment/1000
  type: puppet
    puppet_manifest: puppet/manifests/task_X.pp
    puppet_modules: puppet/modules

- role: ['*']
  stage: post_deployment/3000
  type: puppet
    puppet_manifest: puppet/manifests/task_Z.pp
    puppet_modules: puppet/modules

# tasks.yaml for plugin B
- role: ['*']
  stage: post_deployment/2000
  type: puppet
    puppet_manifest: puppet/manifests/task_Y.pp
    puppet_modules: puppet/modules

How would it be handled without tasks.yaml?


[1] https://review.openstack.org/#/c/271417/
[2] https://wiki.openstack.org/wiki/Fuel/Plugins#Plugins_deployment_order
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