How do I run a health check only for a specific set of nodes?

With Bright 8.x this can be done using nodeexecutionfilters.

Example:

Modifying the megaraid health check to only be run on a specific set of nodes rather than on all nodes of the cluster.

First, go into the nodeexecutionfilters submode of the megaraid check: 
# cmsh 
% monitoring setup use megaraid 
% nodeexecutionfilters 

Next remove the existing filter: 
% remove mega\ raid 

Then, create a new filter for your specific set of nodes. For example, let’s say you only want the check to run on node001 through node003: 
## Note here that "onlythesenodes" is just a name, which you can change ## 
% add node onlythesenodes 
% set nodes node00[1-3] 
% commit 

After that, you can verify which nodes the megaraid check will run on using the “nodes” command while in the megaraid check’s definition: 
% monitoring setup use megaraid 
% nodes