How to remove a system from a VCS cluster?

petulia3478

Removing a node from a cluster

On the node to remove backup the current configuration file

# cp -p /etc/VRTSvcs/conf/config/main.cf /etc/VRTSvcs/conf/config/main.cf.origcopy

Check status of systems and service groups

# hastatus -summary

Look at the output and see which service groups are running on the system to remove, and switch the failover service groups from the system being removed

# hagrp -switch groupname -to sweep

Check for dependencies on the system being removed

# hagrp -dep

If the service groups on the system being removed require other service groups, if it is a parent to another service group on other nodes, unlink it

# haconf -makerw
# hagrp -unlink grp_parent_name grp_name

Stop VCS on the system being removed

# hastop -sys sue

Verify, you should see status of EXITED

# hastatus -summary

Delete from the cluster

# hasys -delete sue

Save the configuration

# haconf -dump -makero

Modify the /etc/llthosts on remaining systems in the cluster, to only include the systems left

Unconfigure GAB and LLT

# /sbin/gabconfig -U
# /sbin/lltconfig -U

Unload the GAB and LLT modules from the kernel

Remove VCS packages and patches

Remove the llt and gab files

# rm /etc/llttab
# rm /etc/gabtab
# rm /etc/llthosts