If I check a remote dict item (inside a role/playbook), that may not be
present like:
debug msg="JAVA_HOME= {{ ansible_env.JAVA_HOME }} "
Then I get the following exception:
> TASK: [java-noinstall | debug msg="JAVA_HOME= {{ ansible_env.JAVA_HOME }}
> "] ***
> fatal: [vm] => One or more undefined variables: 'dict object' has no
> attribute 'JAVA_HOME'
>
> FATAL: all hosts have already failed -- aborting
>
I have two workarounds:
1. create a computed variable in /vars/main.yaml:
> ---
> actual_java_home: "{{ ansible_env.JAVA_HOME if ('JAVA_HOME' in
> ansible_env) else ''}}"
>
...and use that instead as a condition inside the role/playbook:
debug msg="JAVA_HOME= {{ actual_java_home }} "
2. check once and then register a new variable based on the result:
- name: First conditional task
> when: {{ ansible_env.JAVA_HOME if ('JAVA_HOME' in ansible_env) else ''}}
> register: change_it
>
action: ...
>
>
- name: Second conditional task
> when: not change_it|skipped
>
action: ...
>
Is there a better solution for that? Or those are the best practices?
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