As soon an instance is created on any cloud provider (Aws, Google Cloud, Azure, etc.), and a port for some common service is open to the world (like SSH) we will notice some brute force attack.

OwnCloud is a file server that provides a convenient way to store files on Cloud, On-premises, or even in a Raspberry PI.

To replace instances in an gcloud compute instance-groups using cli: gcloud beta compute instance-groups managed rolling-action replace <instance-group> --zone=<zone>