SSH agent forwarding tester for ansible / vagrant

sshtest-playbook.yml

---
- hosts: all
  sudo: no
  tasks:
    - shell: echo "Client= [$SSH_CLIENT] Sock= [$SSH_AUTH_SOCK]"
      register: myecho
    - debug: msg="{{myecho.stdout}}"
    - shell: ssh-add -l
      register: myecho
    - debug: msg="{{myecho.stdout}}"
    - shell: ssh -T -vvvv [email protected]
      register: myecho
    - debug: msg="{{myecho.stdout}}"

Still didn't work for me, after setting up the -HE flag and become: false for the task that required the agent.

For me setting an explicit --ssh-extra-args '-o UserKnownHostsFile=/dev/null' for the ansible-playbook invocation solved the issue. Thanks to this SO answer https://stackoverflow.com/a/23704069