Security Considerations
By default all connections between every provided node is secured via TLS by easyrsa, including the etcd cluster.
Implementation
The TLS and easyrsa implementations use the following layers.
layer-tls-client layer-easyrsa
This page explains the security considerations of a deployed cluster and production recommendations.
Before you begin
This page assumes you have a working Juju deployed cluster.
Limiting ssh access
By default the administrator can ssh to any deployed node in a cluster. You can mass disable ssh access to the cluster nodes by issuing the following command.
juju model-config proxy-ssh=true
Note: The Juju controller node will still have open ssh access in your cloud, and will be used as a jump host in this case.
Refer to the model management page in the Juju documentation for instructions on how to manage ssh keys.