Ansible Deprecation Warning

[ColonelPanics]

In later releases of Ansible (2.12+) there will need to be changes to boolean evaluation. Message printed below.

TASK [flightenv-bootstrap : Prepare xterm desktop] *******************************************************************
[DEPRECATION WARNING]: evaluating true as a bare variable, this behaviour will go away and you might need to add
|bool to the expression in the future. Also see CONDITIONAL_BARE_VARS configuration toggle.. This feature will be
removed in version 2.12. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.
skipping: [node01]
[DEPRECATION WARNING]: evaluating true as a bare variable, this behaviour will go away and you might need to add
|bool to the expression in the future. Also see CONDITIONAL_BARE_VARS configuration toggle.. This feature will be
removed in version 2.12. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.
skipping: [node02]
[DEPRECATION WARNING]: evaluating true as a bare variable, this behaviour will go away and you might need to add
|bool to the expression in the future. Also see CONDITIONAL_BARE_VARS configuration toggle.. This feature will be
removed in version 2.12. Deprecation warnings can be disabled by setting deprecation_warnings=False in ansible.cfg.
changed: [gateway1]

Note: Identified on ansible-2.8.5-1.el7.noarch, installed 2019-10-30 from CentOS 7, the latest version available from EPEL as of writing.