remote host unreachable

[prasadm1983]

Hi Walokra,
i getting below issue. host un reachable. even if you mount valume how remote host will know docker image ssh key. my understand we need to public key to remote host before executing playbook. could you please guide me.

TASK [Gathering Facts] ************************************************************************************************************************************************************
fatal: [1xxxx.xxx.xxx.xx]: UNREACHABLE! => {"changed": false, "msg": "SSH Error: data could not be sent to remote host "1xxx.xx.xx.xx". Make sure this host can be reached over ssh", "unreachable": true}