Description

Flatcar overwrites the authorized_keys file on reboot, so ’update-ssh-keys’ is required to update the exisiting authorized_keys file.

update-ssh-keys program runs forever without any output to console when running the command:

update-ssh-keys -u joeadmin -a 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBZ7E5LpKNYXpfrG39mK+Qwoks+fGmidJBcPdfaZvMFZ joe.smoe@smoe.com'

Impact

Unable to add additional ssh keys to a user account’s authorized_keys file that is persistent after the VM is provisioned. Without SSH keys for this admin account, would have to share a password.

Environment and steps to reproduce

1. New Flatcar Stable (Flatcar Container Linux by Kinvolk 3975.2.1 (Oklo))
2. Azure VM Image: kinvolk:flatcar-container-linux:stable-gen2:latest
3. ignition file containing a user with a ssh key
4. Log into the Flatcar VM.
5. sudo -i
6. update-ssh-keys -u joeadmin -a 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBZ7E5LpKNYXpfrG39mK+Qwoks+fGmidJBcPdfaZvMFZ joe.smoe@smoe.com’

Expected behavior

update-ssh-keys should not run forever. Return an error and implement a timeout.

Additional Information

Really be great to add a few examples in the help file - update-ssh-keys -h