I installer rancher on a Digital Ocean droplet and created a Digital Ocean cluster with 3 nodes. All have private networking enabled and have a private and public IP.
After looking at the bandwidth graphs in Digital Ocean it seems all the communication between the nodes and also between the nodes an rancher server is being done using the public IP address instead of the private network.
According to Digital Ocean in a few days I have used 833GB of public bandwidth so will probably use several TB of public bandwidth each month.
Is there any way to use the private network instead for communication between the nodes and also for communication with the rancher server?