Remove a host

About this task

Removing a host from LSF involves preventing any additional jobs from running on the host, removing the host from LSF, and removing the host from the cluster.

CAUTION:

Never remove the master host from LSF. If you want to remove your current default master from LSF, change lsf.cluster.cluster_name to assign a different default master host. Then, remove the host that was once the master host.

Procedure

Log on to the LSF host as root.
Run badmin hclose to close the host. This prevents jobs from being dispatched to the host and allows running jobs to finish.
Stop all running daemons manually.
Remove any references to the host in the Host section of LSF_CONFDIR/lsf.cluster.cluster_name.
Remove any other references to the host, if applicable, from the following LSF configuration files:
- LSF_CONFDIR/lsf.shared
- LSB_CONFDIR/cluster_name/configdir/lsb.hosts
- LSB_CONFDIR/cluster_name/configdir/lsb.queues
- LSB_CONFDIR/cluster_name/configdir/lsb.resources
Log off the host to be removed, and log on as root or the primary LSF administrator to any other host in the cluster.
Run lsadmin reconfig to reconfigure LIM.
Run badmin mbdrestart to restart mbatchd.
If you configured LSF daemons to start automatically at system startup, remove the LSF section from the host’s system startup files.
If any users of the host use lstcsh as their login shell, change their login shell to tcsh or csh. Remove lstcsh from the /etc/shells file.