Thanks! I've setup my service script to get check on bootup if an end-user id exists, and do nothing if it doesn't. I have a generic user (called "user") already added to use to make SSH connections. I invoke it during vcl_post_reserve:
# Allow user "user" to SSH in (using certificates) sed -i 's/^AllowUsers.*/& user/' /etc/ssh/external_sshd_config /etc/rc.d/init.d/ext_sshd restart /etc/rc.d/init.d/init-openmpi-node-service start The startup script registers the node with the cluster by creating a file on an NFS share under the end-user's home directory there. The only issue a the moment is that I haven't found a proper hook to invoke the "service stop" routine, which unregisters the node from the cluster. I can hook "vcl_post_reload", but at that time the image has already been cleaned up. It doesn't seem that the image goes through a shutdown or reboot (init 0) at the end of the reservation, so the service script never gets a chance to perform its stop action. Any hints before I do some further spelunking in the code?
