When you install VCS using the installer, the installer generates the cluster UUID (Universally Unique ID) value. This value is the same across all the nodes in the cluster.
You can use the uuidconfig utility to display, copy, configure, and unconfigure the cluster UUID on the cluster nodes.
Make sure you have ssh or rsh communication set up between the systems. The utility uses ssh by default.
To display the cluster UUID value on the VCS nodes
To configure cluster UUID on the VCS nodes
Run the following command to configure the cluster UUID value:
For specific nodes:
# /opt/VRTSvcs/bin/uuidconfig.pl [-rsh] -clus -configure sys1 [sys2 sys3...]
For all nodes that are specified in the
# /opt/VRTSvcs/bin/uuidconfig.pl -clus -configure -use_llthost
The utility configures the cluster UUID on the cluster nodes based on whether a cluster UUID exists on any of the VCS nodes:
If no cluster UUID exists or if the cluster UUID is different on the cluster nodes, then the utility does the following:
Generates a new cluster UUID using the
/etc/vx/.uuids/clusuuid file where the utility stores the cluster UUID.
Configures the cluster UUID on all nodes in the cluster.
If a cluster UUID exists and if the UUID is same on all the nodes, then the utility retains the UUID.
Use the -force option to discard the existing cluster UUID and create new cluster UUID.
If some nodes in the cluster have cluster UUID and if the UUID is the same, then the utility configures the existing UUID on the remaining nodes.
To unconfigure cluster UUID on the VCS nodes
Run the following command to unconfigure the cluster UUID value:
/etc/vx/.uuids/clusuuidfile from the nodes.
To copy the cluster UUID from one node to other nodes
# /opt/VRTSvcs/bin/uuidconfig.pl [-rsh] -clus -copy -from_sys sys -to_sys sys1 sys2 [sys3...]
The utility copies the cluster UUID from a system that is specified using the-from_sys option to all the systems that are specified using the -to_sys option.