Logging within the interactive shell of the openstack command

When someone uses the interactive shell in the openstack command, i (Sysadmin) would need a logfile or a syslog connection where i can see the commands, what my customer, my first level or i myself did in the past within this shell.

I'd prefer a kind of logging like it's realised in the sudo-command, where i can put the log into a splunk adapter, so it's not changeable afterwards to cover my own behaviour.