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Add example of rolling update using a percentage.

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Howard Oettle 2014-04-10 12:57:39 +00:00 • committed by Michael DeHaan
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docsite/rst/playbooks_delegation.rst
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@ -33,6 +33,18 @@ use case, you can define how many hosts Ansible should manage at a single time b
In the above example, if we had 100 hosts, 3 hosts in the group 'webservers' In the above example, if we had 100 hosts, 3 hosts in the group 'webservers'
would complete the play completely before moving on to the next 3 hosts. would complete the play completely before moving on to the next 3 hosts.
The ''serial'' keyword can also be specified as a percentage, which will be applied to the total number of hosts in a
play, in order to determine the number of hosts per pass::
- name: test play
hosts: websevers
serial: "30%"
If the number of hosts does not divide equally into the number of passes, the final pass will contain the remainder.
.. note::
No matter how small the percentage, the number of hosts per pass will always be 1 or greater.
.. _maximum_failure_percentage: .. _maximum_failure_percentage:
Maximum Failure Percentage Maximum Failure Percentage