So, I tried to do this, and found it didn't work. I wasn't terribly
surprised, but it seems like a reasonable use-case.
The play is to be run on one host- a central server, and I have a list of
groups that I want to perform actions for- for each host in each group.
The code looks something like this:
1. vars:
2. group_list: [ 'group1', 'group2', 'group3' ]
3. my_script: /some/script/foo.sh
4.
5. tasks:
6. - name: Nested task
7. command: ${my_script} action-{{item.0}}
"{{hostvars[item.1]['some_fact']}}"
8. with_nested:
9. - group_list
10. - groups[item.0]
What happens is that ansible interprets "groups[item.0]" as a string and
tries to iterate over it's characters. Seems like a valid use case, but I
can understand that re-evaluating the inner list on each outer-loop may be
challenging.
It's easily enough accomplished by unrolling the outer loop, but moderately
annoying that I can't reduce it to a nested loop.
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