For some the delay between refreshing host information and acting on that host information (i.e. running Ansible tasks against the hosts) may be too long. This may be the case in such scenarios where EC2 AutoScaling is being used to scale the number of instances as a result of a particular event. Such an event may require that hosts come online and are configured as soon as possible (even a 1 minute delay may be undesirable). Its possible to pre-bake machine images which contain the necessary ansible-pull script and components to pull and run a playbook via git. The machine images could be configured to run ansible-pull upon boot as part of the bootstrapping procedure.
For some the delay between refreshing host information and acting on that host information (i.e. running Ansible tasks against the hosts) may be too long. This may be the case in such scenarios where EC2 AutoScaling is being used to scale the number of instances as a result of a particular event. Such an event may require that hosts come online and are configured as soon as possible (even a 1 minute delay may be undesirable). Its possible to pre-bake machine images which contain the necessary ansible-pull script and components to pull and run a playbook via git. The machine images could be configured to run ansible-pull upon boot as part of the bootstrapping procedure.
More information on pull-mode playbooks can be found `here <http://www.ansibleworks.com/docs/playbooks2.html#pull-mode-playbooks>`_.
Read :ref:`ansible-pull` for more information on pull-mode playbooks.
(Various developments around Ansible are also going to make this easier in the near future. Stay tuned!)
(Various developments around Ansible are also going to make this easier in the near future. Stay tuned!)
@ -335,8 +335,7 @@ Let's run a playbook using a parallelism level of 10::
ansible-playbook playbook.yml -f 10
ansible-playbook playbook.yml -f 10
.._tips_and_tricks:
.._ansible-pull:
Ansible-Pull
Ansible-Pull
````````````
````````````
@ -353,6 +352,8 @@ Run 'ansible-pull --help' for details.
There's also a `clever playbook <https://github.com/ansible/ansible-examples/blob/master/language_features/ansible_pull.yml>`_ available to using ansible in push mode to configure ansible-pull via a crontab!
There's also a `clever playbook <https://github.com/ansible/ansible-examples/blob/master/language_features/ansible_pull.yml>`_ available to using ansible in push mode to configure ansible-pull via a crontab!
@ -382,7 +382,7 @@ Subsequent loops over the registered variable to inspect the results may look li
Writing Your Own Iterators
Writing Your Own Iterators
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While you ordinarily shouldn't have to, should you wish to write your own ways to loop over arbitrary datastructures, you can read `developing_plugins` for some starter
While you ordinarily shouldn't have to, should you wish to write your own ways to loop over arbitrary datastructures, you can read :doc:`developing_plugins` for some starter
information. Each of the above features are implemented as plugins in ansible, so there are many implementations to reference.
information. Each of the above features are implemented as plugins in ansible, so there are many implementations to reference.