Once you login to Rundeck instance, on the top right corner you'll see a setting icon next to the profile icon
Click on it and choose -> Key storage
Click on Add or Upload a Key option
Key Type can be ->
Private Key
Private Key
Public Key
Password
If
you select Private Key or Public Key, use id_rsa and id_rsa.pub file
contents from the node server/host into Rundeck. If you choose Password
option, enter the password string
Click on Save