Node attribute metric

The backend_node_attribute metric consolidates infrastructure node attributes in a single Prometheus metric. It exposes a separate time series for each node and attribute, so you can check whether a node is online, assigned to the storage cluster, included in high availability, used by a service, or in maintenance.

This is a boolean metric: the value is 1 if the attribute applies to the node and 0 otherwise. Prometheus recording rules that use this metric can be found in the /var/lib/prometheus/rules/backend.rules file on any node in the cluster.

Metric	Description	Labels
`backend_node_attribute`	Shows whether the node has the specified attribute.	`cluster_id` Cluster ID `hostname` Node hostname `node` Node ID `attribute` Node attribute. The supported values are: `online`: node is online `ha`: node is included in the HA configuration `primary`: node is the primary management node `compute_worker`: node is a compute worker node `compute_controller`: node is a compute controller node `fenced`: node is in a fenced state `abgw`: node is included in the backup storage cluster `assigned`: node is assigned to the storage cluster `maintenance`: node is in maintenance