4.4. Querying and Setting Cluster Options

⁠4.4. Querying and Setting Cluster Options

Cluster options can be queried and modified using the crm_attribute tool. To get the current value of cluster-delay, you can run:

# crm_attribute --query --name cluster-delay

which is more simply written as

# crm_attribute -G -n cluster-delay

If a value is found, you’ll see a result like this:

# crm_attribute -G -n cluster-delay
scope=crm_config name=cluster-delay value=60s

If no value is found, the tool will display an error:

# crm_attribute -G -n clusta-deway
scope=crm_config name=clusta-deway value=(null)
Error performing operation: No such device or address

To use a different value (for example, 30 seconds), simply run:

# crm_attribute --name cluster-delay --update 30s

To go back to the cluster’s default value, you can delete the value, for example:

# crm_attribute --name cluster-delay --delete
Deleted crm_config option: id=cib-bootstrap-options-cluster-delay name=cluster-delay

⁠4.4.1. When Options are Listed More Than Once

If you ever see something like the following, it means that the option you’re modifying is present more than once.

⁠

Example 4.2. Deleting an option that is listed twice

# crm_attribute --name batch-limit --delete

Multiple attributes match name=batch-limit in crm_config:
Value: 50          (set=cib-bootstrap-options, id=cib-bootstrap-options-batch-limit)
Value: 100         (set=custom, id=custom-batch-limit)
Please choose from one of the matches above and supply the 'id' with --id

In such cases, follow the on-screen instructions to perform the requested action. To determine which value is currently being used by the cluster, refer to the Rules section of Pacemaker Explained.