docker - Ansible: 'item' is undefined -

i'm trying use with_items delegate_to run docker container in several hosts. have group test in /etc/ansible/hosts:

[test] my_machine1 my_machine2 

and task:

 - name: run app container     docker:       name: "{{artifact_id}}"       insecure_registry: true       image: "{{image}}:{{version}}"       pull:       state: reloaded       ports:       - "{{port_mapping}}"       delegate_to: '{{item}}'       with_items:       - "{{groups['test']}}" 

but when run it, error:

{"failed": true, "msg": "error! 'item' undefined"}

what doing wrong?

thanks in advance

you need take care of indention. delegate_to , with_items part of task, not of docker module.

- name: run app container   docker:     name: "{{artifact_id}}"     insecure_registry: true     image: "{{image}}:{{version}}"     pull:     state: reloaded     ports:       - "{{port_mapping}}"   delegate_to: '{{item}}'   with_items: "{{groups['test']}}" 

though i'm not sure delegation work here. background why need delegate in first place? normal way apply play hosts of group test. guess you're instead running play against localhost?

_{another unrelated thing: experienced issues docker module when pull: always used state: reloaded. unlike docker-compose, docker module always restart container no matter if there updated image pulled or not.}

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- hosts: localhost   tasks:     - download nexus     - build image     - upload registry     - ... - hosts: test   tasks:     - docker: ...