How to manage cron service start and stop on 2 resource groups

Hi all, I've set up a cluster for 2 Red Hat 7 servers. This cluster will manage 2 resource groups. These 2 groups are similar, they are managing VIP, Mount Points, and DB instance, the difference between these 2 groups is they are running different DB instance.
These 2 resource groups can failover or manual switch the whole group of resource on these 2 red hat servers independently. I have a question about cron job. User request they need cron job for doing DB backup, So I don't know how to set up a resource for cron service. It will have 3 scenarios.
Scenario 1: 2 resource groups running on the same node, cron service start.
Scenario 2: Each server running 1 resource group, 2 servers start cron service.
Scenario 3: No resource running on the same node, it doesn't need to start cron service.
Please help.