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clu_delete_member - Remove a member from a cluster
/usr/sbin/clu_delete_member [-f] [-m memberid]
-f Force the deletion of the member. Normally clu_delete_member
attempts to mount the boot partition of the member being deleted;
if it cannot mount the boot partition, it exits. When you
specify -f, clu_delete_member deletes the member even if it
cannot mount that member's boot partition.
Specifies the memberid of the cluster member that
clu_delete_member should remove. (If you do not supply a member
ID, the command prompts for the member ID of the member to
The clu_delete_member command removes a member from a cluster. You must be
root to run this command.
The command is interactive. It prompts for the information required to
perform each task, displays the entered information so you can check its
accuracy, and, only after you confirm that the information is correct,
modifies the system. The command also provides online help. To display a
help message, type the word help or a question mark, ?, at any prompt.
The clu_delete_member command does the following:
· Mounts the member's boot partition and deletes all files in the boot
partition. The system can no longer boot from this disk.
The clu_delete_member -f command will delete a member even
when the member's boot disk is inaccessible. This lets you
delete a member whose boot disk has failed or is for any
reason inaccessible. However, if clu_delete_member cannot
access the disk, you must make sure that no cluster member
can inadvertently boot from that disk. Remove the disk from
the cluster, reformat it, or use the disklabel command to
make it a nonbootable disk.
· If the member has votes, and if the member's boot disk is accessible,
it adjusts the value of cluster_expected_votes throughout the cluster.
If clu_delete_member cannot mount the boot partition, it
cannot determine the number of votes held by the member, and
therefore cannot reset cluster_expected_votes throughout the
cluster. After clu_delete_member completes, use the
clu_quorum command to check the value of
cluster_expected_votes. Adjust the value if necessary. For
example, if the deleted member had 0 votes, no adjustment is
needed, but if the member had 1 or more votes,
cluster_expected_votes should be adjusted.
· Deletes all member-specific directories and files in the clusterwide
The clu_delete_member command deletes member-specific files
from the /cluster, /usr/cluster, and /var/cluster
directories. However, an application or an administrator can
create member-specific files in other directories, such as
/usr/local. You must manually remove those files after
running clu_delete_member. Otherwise, if you add a new
member and re-use the same member ID, the new member will
have access to these (outdated and perhaps erroneous) files.
· Removes the deleted member's host name for its cluster interconnect
interface from the /.rhosts and /etc/hosts.equiv files.
· Writes a log file of the deletion to
The TruCluster Server Cluster Administration manual describes how to delete
a cluster member. Refer to that manual before running the clu_delete_member
The following list outlines the steps needed to delete a member from the
1. Determine whether the member is a critical voting member of the
cluster. If the member supplies a critical vote to the cluster,
halting it will cause the cluster to lose quorum and suspend
operations. Before halting the member, use the clu_quorum command to
determine whether it is safe to do so. (See clu_quorum(8) and the
TruCluster Server Cluster Administration manual for information on
2. Halt the member to be deleted.
3. Make sure that all voting cluster members are up.
4. On another cluster member, run the clu_delete_member command to remove
the halted member from the cluster. For example, to delete a halted
member whose member ID is 3, enter the following command:
# /usr/sbin/clu_delete_member -m 3
Specifies the command path.
Log file for clu_delete_member.
Commands: clu_add_member(8), clu_check_config(8), clu_create(8),
TruCluster Server Cluster Administration
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