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Make password lookup treat /dev/null as a special case

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I have from time to time a need of random password without
wanting to write them down (one example is mailman list creation,
that requires a password to be given to be sent to the list owner).

But using /dev/null do not return null, but the empty string, which
doesn't generate a password at all and so do not achieve my use case.
This commit is contained in:
Michael Scherer
2016-09-27 23:31:21 +02:00
committed by Matt Clay
parent 103ede26df
commit 6fae1d2bbf
3 changed files with 18 additions and 2 deletions
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docs/docsite/rst/playbooks_lookups.rst
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@@ -52,6 +52,9 @@ a file at a given filepath.
If the file exists previously, it will retrieve its contents, behaving just like with_file. Usage of variables like "{{ inventory_hostname }}" in the filepath can be used to set
up random passwords per host (which simplifies password management in 'host_vars' variables).
A special case is using ``/dev/null`` as a path. The password lookup will generate a new random password each time, but will not write it to ``/dev/null``. This can be used when you need a password
without storing it on the controller.
Generated passwords contain a random mix of upper and lowercase ASCII letters, the
numbers 0-9 and punctuation (". , : - _"). The default length of a generated password is 20 characters.
This length can be changed by passing an extra parameter::