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48 lines
1.6 KiB
YAML
48 lines
1.6 KiB
YAML
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---
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# this is a demo of conditional executions using 'only_if', which can skip
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# certain tasks on machines/platforms/etc where they do not apply. This is
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# the more 'raw' version of the 'when' statement, most users will be able to
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# use 'when' directly. 'only_if' is an older feature, and useful for when
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# you need more advanced expression control.
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- hosts: all
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user: root
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vars:
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favcolor: "red"
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ssn: 8675309
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# Below we're going to define some expressions.
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#
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# Not only can we assign variables for reuse, but we can also assign conditional
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# expressions. By keeping these in 'vars', the task section remains
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# extraordinarily clean, and not littered with programming language
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# constructs -- so it's easily skimmed by humans.
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#
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# Remember to quote any variables if they are not numbers!
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#
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# Interesting fact: aside from the $variables, these expressions are actually
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# tiny bits of Python. They are evaluated in the context of each host, so different
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# steps can be skipped on different hosts! They should evaluate to either True
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# or False
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is_favcolor_blue: "'$favcolor' == 'blue'"
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is_centos: "'$facter_operatingsystem' == 'CentOS'"
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# NOTE:
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#
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# setup module values, facter and ohai variables can be used in only_if statements too
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# ex: "'$facter_operatingsystem' == 'CentOS'", which bubble up automatically
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# from the managed machines. This example doesn't do that though.
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tasks:
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- name: "do this if my favcolor is blue"
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action: shell /bin/false
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only_if: '$is_favcolor_blue'
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- name: "do this if my favcolor is not blue"
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action: shell /bin/true
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only_if: 'not ($is_favcolor_blue)'
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