3.4. Resource Constraints
3.4. Resource Constraints You can determine the behavior of a resource in a cluster by configuring constraints . You can configure the following categories of constraints: location constraints - A location constraint determines which nodes a resource can run on. order constraints - An order constraint determines the order in which the resources run. colocation constraints - A colocation constraint determines where resources will be placed relative to other resources. As a shorthand for configuring a set of constraints that will locate a set of resources together and ensure that the resources start sequentially and stop in reverse order, Pacemaker supports the concept of resource groups.