I am able to ssh to system@xxx.cloudapp.azure.com with no problems using the keys I created when deploying the instance. The system account had no existing keys so I used scp to copy the generated keys to the jump box. Next I tried to ssh to one of the cluster nodes, but that fails as follows:
$ ssh -i ~/.ssh/jira_rsa system@10.0.2.4
system@10.0.2.4: Permission denied (publickey).
I also tried the Azure portal serial console logging in as system, but the system password I configured that works to login into the Jira web UI doesn't work in the serial console.
How am I supposed to connect to this cluster node vm?