I am running a task which i only want to execute if the value of a variable that i have previously set does not exist in another variable. I have tried the following but it errors with a templating error:
name: get ip address
...
register: ipaddress
name: check cluster
....
register: topology
name: do my task
...
when: not topology is search(ipaddress)
Is there any way in ansible to accomplish what i am doing? I'm using version 2.6.
Use regex_filter.
Regular Expression Filters
To search a string with a regex, use the “regex_search” filter:
{{ 'foobar' | regex_search('(foo)') }}
{{ 'ansible' | regex_search('(foobar)') }}
{{ 'foo\nBAR' | regex_search("^bar", multiline=True, ignorecase=True) }}
For your example, making a few assumptions -
when: not topology | regex_search(ipaddress, multiline=True)
(in a meeting, can't test this, please check it and let me know if it isn't quite right.)
"The conditional check 'not topology | regex_search(ipaddress, multiline=True)' failed. The error was: Unexpected templating type error occurred on ({% if not topology | regex_search(ipaddress, multiline=True) %} True {% else %} False {% endif %}): expected string or buffer"