15장. Configuring node-specific values using node attributes

Pacemaker supports the configuration of node-specific values, which you specify using node attributes. You can use node attributes to track information associated with a node. For example, you can define node attributes for how much RAM and disk space each node has, which OS each node uses, or which server room rack each node is in.

There are three primary uses for node attributes:

Defining a node attribute

You define a node attribute with the pcs node attribute command. A node attribute has a name and a value, and can have a distinct value for each node.

When you define a node attribute with the pcs node attribute command, the node attribute is permanent. Permanent node attributes keep their values even when the cluster restarts on a node.

# pcs node attribute node1 rack=1
# pcs node attribute node2 rack=2

Displaying node attributes as pcs commands

You can export node attributes as a series of pcs commands by using the --output-format=cmd option. This is useful for scripting, automation, or replicating the same configuration on a different system.