Arvados

When creating a new cloud instance, arvados-dispatch-cloud generates the public key counterpart of Containers.DispatchPrivateKey and installs it as an authorized SSH key for the relevant login account (LinuxConfiguration.SSH.PublicKeys on Azure, ImportKeyPair/KeyName on AWS).

Some sites may prefer to use a different approach (e.g., pre-install the public key on the worker image or retrieve it from some other source during instance boot). In that case the automatic deployment would be superfluous at best, and could prevent instance creation from working at all if the relevant cloud APIs are disabled by policy.

Proposed option

    CloudVMs:
      # Install the dispatcher's SSH public key (derived from                                                                                                                                                    
      # DispatchPrivateKey) when creating new cloud instances. Change                                                                                                                                            
      # this to false if you are using a different mechanism to                                                                                                                                                  
      # pre-install the public key on new instances.                                                                                                                                                                 
      DeployPublicKey: true