Removing a host from LSF involves closing a host to prevent any additional jobs from running on the host and
removing references to the host from the
lsf.cluster.cluster_name file and other
configuration files.
About this task
CAUTION:
Never remove the management host from LSF. If you want to change your current default management host, change the
lsf.cluster.cluster_name file to
assign a different default management host. Then remove the host that was formerly the
management host.
Procedure
-
Log on to the LSF host as root.
-
Run badmin hclose to close the host.
Closing the host 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
the LSF_CONFDIR/lsf.cluster.cluster_name
file.
-
Remove any other references to the host, if applicable, from the following
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 the lsadmin reconfig command to reconfigure LIM.
% lsadmin reconfig
Checking configuration files ...
No errors found.
Do you really want to restart LIMs on all hosts? [y/n] y
Restart LIM on <hosta> ...... done
Restart LIM on <hostc> ...... done
The lsadmin reconfig command checks for configuration
errors.
If no errors are found, you are asked to confirm that you want
to restart
lim on all hosts and
lim is
reconfigured. If unrecoverable errors are found, reconfiguration exits.
-
Run the badmin mbdrestart command to restart
mbatchd.
% badmin reconfig
Checking configuration files ...
No errors found.
Do you want to reconfigure? [y/n] y
Reconfiguration initiated
The badmin mbdrestart command checks for configuration
errors.
If no unrecoverable errors are found, you are asked to confirm
reconfiguration. If unrecoverable errors are found, reconfiguration exits.
-
If you configured LSF daemons to start automatically at system startup, remove the
LSF section from the host’s system startup
files.