Execution of the playbook failed like this before:
TASK [lespocky.telegraf_docker_in_docker : Copy telegraf docker_input_agent conf] ************************************************************************************************
fatal: [unicorn.n39.eu]: FAILED! => changed=false
checksum: 3230d394872351730e265778639936912c9f1030
msg: Destination directory /etc/telegraf does not exist
fatal: [krypton.n39.eu]: FAILED! => changed=false
checksum: 3230d394872351730e265778639936912c9f1030
msg: Destination directory /etc/telegraf does not exist
fatal: [radon.n39.eu]: FAILED! => changed=false
checksum: 3230d394872351730e265778639936912c9f1030
msg: Destination directory /etc/telegraf does not exist
fatal: [pottwal.n39.eu]: FAILED! => changed=false
checksum: 3230d394872351730e265778639936912c9f1030
msg: Destination directory /etc/telegraf does not exist
That was a bug in the role, which was fixed with release v0.2.1.
Link: https://github.com/LeSpocky/ansible-role-telegraf-docker-in-docker/issues/15