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}}"

Pretty handy if you want to set up ssh agent forwarding and you need to see if it worked. With vagrant, you can do:

  config.vm.provision "ansible" do |ansible|
      ansible.playbook = "sshtest.yml"
      ansible.verbose = "v"
      ansible.raw_ssh_args = ['-o ForwardAgent=yes']
  end

More info about sudo and how it affects ssh agent forwarding: ansible/ansible#7235

• See if $SSH_AUTH_SOCK looks empty. If it is, that means it's not getting set up.
• Try setting sudo=yes to see if that works if you run your playbook with sudo - you may need to pass sudo_flags=-HE If so, the above link to the github issue helps.
• OSX is sometimes dumb and won't set up agent forwarding even when you see a key as added, in which case you may have to do ssh-add -K.

ssh-add -k (it's lower case k by the way) solved all my problems, thanks for that @makmanalp!

@smowdeb yep helped me too. same symptoms.

OSX is sometimes dumb and won't set up agent forwarding even when you see a key as added, in which case you may have to do ssh-add -K.

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