#cloud-config

hostname: backup.test
coreos:
  update:
    reboot-strategy: best-effort  
users:
  - name: backup
    ssh-authorized-keys:
      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDA9rLjfQVci9g/ex+ZYGH0n1cSyp65oKeAgcPQtWGJ6V3KbzzePlR+ROSwA8XtSks9geQdq8kuWvO07cWrgvoOg1OYRfRhjQj0mY0uIKXSEAcGC2ndZoKN0CBOsPhYhZCxeMIem9ixmOFPSRhYgfg6+JZDn5/EZR/s2Et04yksHRmwxxuc7Pj6d0bBvUnkWz6IEZ7G8qhNikOAXskxEJKnm5grpPf7bQk6nztNbHwxuCHC3FrcTlu3a3yEMpC1+bmkCicVOQGtl7aVEQiGJMc7jITv52YC6Gcg+Oz65hLG9JJF3w42uFj01di6ghJAHwaqOBP2fGpKhoi1+FwQnmnf root@server.test