I have two servers. I manage serverA with Ansible. serverB is not managed with Ansible. I want serverA to be able to access serverB by copying the ssh_pub_key of serverA to serverB.
This can be done manually by calling ssh-copy-id user@serverB on serverA.
I want to do this with Ansible on serverA automatically.
- name: Register ssh key at serverB command: ssh-copy-id -i /home/{{user}}/.ssh/id_rsa.pub -o StrictHostKeyChecking=no user@serverB Calling ssh-copy-id requires me to enter my ssh password for user@serverB, so the key can be copied.
How can I do this via ansible? I want it to ask for the user@serverB password interactively while executing the playbook. Storing the password in ansible vault is also an option. Then I still do not know how to avoid the interactive password call of ssh-copy-id though.
I also added -o StrictHostKeyChecking=no to the call because this is another interaction that normally requires user interaction when calling ssh-copy-id.
2 Answers
If using the ssh-copy-id command is not a restriction, you might as well try out the Ansible authorized_key module.
Then your code could look something like this:
authorized_key: user: <user> key: "{{ lookup('file', '/home/' + lookup('env', 'USER') + '/.ssh/id_rsa.pub') }}" You can try sshpass tool. It would require modification of your command like this:
command: sshpass -p password ssh-copy-id -i /home/{{user}}/.ssh/id_rsa.pub -o StrictHostKeyChecking=no user@serverB but there are other options how to provide the password -- see the sshpass(1) manual page.
