Ensuring a command only runs once

[Jonathan Rowlands]

Sorry if this has been asked before...  Is there a pattern to ensure a command gets run once and only once on a machine? For instance if I want to seed a database on the initial deploy but I would never want to run this command again.  I have been doing the following:

shell: mycommand && touch somefile creates=somefile

It works but wasn't sure if there was a better way.

Thanks,

Jon 

[Michael DeHaan]

Creates is the way to go here!

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Michael DeHaan <mic...@ansibleworks.com>
CTO, AnsibleWorks, Inc.
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[Jonathan Rowlands]

Cool, thanks!

[Stefan Eriksson]

hi I have this exact issue but dont understand the anwer "Creates is the way to go here!" could anyone explain in little more detail? thanks.

[James Tanner]

> <https://groups.google.com/groups/opt_out>.

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http://docs.ansible.com/shell_module.html

parameter required default choices comments





creates no
a filename, when it already exists, this step will *not* be run.