It appears that you don’t have the docker module installed. You will need to install it via your system package manager (apt install python-docker, for example), or using pip (pip install docker). If you have multiple Python versions, make sure that you’ve installed the docker module into the version that Ansible is using.
Ansible version 2 introduced a clean, official way to do this using delegated facts (see: http://docs.ansible.com/ansible/latest/playbooks_delegation.html#delegated-facts). when: hostvars[item][‘ansible_default_ipv4′] is not defined is a check to ensure you don’t check for facts in a host you already know the facts about — # This play will still work as intended if called with –limit “<host>” or … Read more
I don’t know if it’s version specific, but I’m currently running ansible-2.3.2 on RHEL6 and I had to put quotes around the group name to get it to work for me: when: groups[“GROUP_NAME”] is defined and (groups[“GROUP_NAME”]|length>0) Edit: I couldn’t add this as a comment to techraf’s answer because I don’t have enough reputation.
Gathering facts is equivalent to running the setup module. You can manually gather facts by running it. It’s not documented, but simply add a task like this: – name: Gathering facts setup: In combination with gather_facts: no on playbook level the facts will only be fetched when above task is executed. Both in an example … Read more
To get first item of the list: – debug: msg: “First item: {{ ansible_processor[0] }}” Or: – debug: msg: “First item: {{ ansible_processor | first }}”
Ansible (from 1.4 onwards) already reveals environment variables for the user under the ansible_env variable. – hosts: all tasks: – name: debug through ansible.env debug: var=ansible_env.HOME Unfortunately you can apparently only use this to get environment variables for the connected user as this playbook and output shows: – hosts: all tasks: – name: debug specified … Read more
A list of all addresses is stored in a fact ansible_all_ipv4_addresses, a default address in ansible_default_ipv4.address. — – hosts: localhost connection: local tasks: – debug: var=ansible_all_ipv4_addresses – debug: var=ansible_default_ipv4.address Then there are addresses assigned to each network interface… In such cases you can display all the facts and find the one that has the value … Read more
From the FAQ: How do I see a list of all of the ansible_ variables? Ansible by default gathers “facts” about the machines under management, and these facts can be accessed in playbooks and in templates. To see a list of all of the facts that are available about a machine, you can run the … Read more