"gwcli" often hangs on the still-up iSCSI GWs but sometimes still functions and gives the message:

This got me thinking about what the course of action would be should an iSCSI gateway fail permanently or semi-permanently, say a hardware issue. What would be the best course of action to instruct the remaining iSCSI gateways that one of them is no longer available and that they should allow updates again and take ownership of the now-defunct-node's LUNS?

I'm guessing pulling down the RADOS config object and rewriting it and re-put'ing it followed by a rbd-target-api restart might do the trick but am hoping there is a more "in-band" and less potentially devastating way to do this. 

Thanks for any insights.