6.3.3. Colocating Sets of Resources

If your configuration requires that you create a set of resources that is colocated and started in order, you can configure a resource group that contains those resources, as described in Section 5.5, “Resource Groups”. If, however, you need to colocate a set of resources but the resources do not necessarily need to start in order, you can create a colocation constraint on a set or sets of resources with the pcs constraint colocation set command.

You can set the following options for a set of resources with the pcs constraint colocation set command.

You can set the following constraint options for a set of resources following the setoptions parameter of the pcs constraint colocation set command.

When listing members of a set, each member is colocated with the one before it. For example, "set A B" means "B is colocated with A". However, when listing multiple sets, each set is colocated with the one after it. For example, "set C D sequential=false set A B" means "set C D (where C and D have no relation between each other) is colocated with set A B (where B is colocated with A)".

The following command creates a colocation constraint on a set or sets of resources.

pcs constraint colocation set resource1 resource2 [resourceN]... [options] [set resourceX resourceY ... [options]] [setoptions [constraint_options]]

pcs constraint colocation set resource1 resource2 [resourceN]... [options] [set resourceX resourceY ... [options]] [setoptions [constraint_options]]