Cluster update metrics

Metrics that are used to generate cluster update alerts are added to the alerting rules in /var/lib/prometheus/alerts/backend.rules. These metrics are described in the table:

Metric Description
softwareupdates_cluster_info Update status for the cluster
softwareupdates_cluster_available Update availability for the cluster
softwareupdates_node_uptodate Shows if the node is up to date
softwareupdates_node_available Update availability for the node
softwareupdates_node_info Update status for the node