Metrics now have expiration if not updated

metrics/pve_metrics_manager.go

@@ -21,6 +21,7 @@ type PveMetricsCollector interface {
 type PveMetricsManager struct {
 	apiClient  *proxmox.PveApiClient // Proxmox virtual environment API client instance.
 	collectors []PveMetricsCollector // Metrics collector instances.
+	registry   *TTLRegistry          // Registry which handles autoamtic dangling metrics deletion.
 
 	latencySummary *prometheus.SummaryVec // Collection latency summary.
 	interval       int                    // Collection interval.
@@ -32,45 +33,46 @@ type PveMetricsManager struct {
 func NewPveMetricsManager(apiClient *proxmox.PveApiClient, conf *configuration.PveConfiguration) *PveMetricsManager {
 	c := PveMetricsManager{apiClient: apiClient, interval: conf.Interval}
 	metricsCf := conf.Metrics
+	c.registry = NewTTLRegistry()
 
 	// Cluster state metrics collector.
 	if metricsCf.ClusterState {
-		c.RegisterCollector(NewPveClusterStateCollector(apiClient))
+		c.RegisterCollector(NewPveClusterStateCollector(apiClient, c.registry))
 	}
 
 	// Node state metrics collector.
 	if metricsCf.NodeStatus {
-		c.RegisterCollector(NewPveNodeStatusCollector(apiClient))
+		c.RegisterCollector(NewPveNodeStatusCollector(apiClient, c.registry))
 	}
 
 	// Node subscription state collector.
 	if metricsCf.Subscription {
-		c.RegisterCollector(NewPveSubscriptionCollector(apiClient))
+		c.RegisterCollector(NewPveSubscriptionCollector(apiClient, c.registry))
 	}
 
 	// Node disk collector.
 	if metricsCf.Disk {
-		c.RegisterCollector(NewPveNodeDiskCollector(apiClient))
+		c.RegisterCollector(NewPveNodeDiskCollector(apiClient, c.registry))
 	}
 
 	// Node SDN collector.
 	if metricsCf.SDN {
-		c.RegisterCollector(NewPveSdnCollector(apiClient))
+		c.RegisterCollector(NewPveSdnCollector(apiClient, c.registry))
 	}
 
 	// Node storage collector.
 	if metricsCf.Storage {
-		c.RegisterCollector(NewPveStorageCollector(apiClient))
+		c.RegisterCollector(NewPveStorageCollector(apiClient, c.registry))
 	}
 
 	// Node container collector.
 	if metricsCf.LXC {
-		c.RegisterCollector(NewPveContainerCollector(apiClient))
+		c.RegisterCollector(NewPveContainerCollector(apiClient, c.registry))
 	}
 
 	// Node virtual machine collector.
 	if metricsCf.QEMU {
-		c.RegisterCollector(NewPveVirtualMachineCollector(apiClient))
+		c.RegisterCollector(NewPveVirtualMachineCollector(apiClient, c.registry))
 	}
 
 	// Metrics collection latency summary.
@@ -79,6 +81,8 @@ func NewPveMetricsManager(apiClient *proxmox.PveApiClient, conf *configuration.P
 		Help: "Summary of metrics collection latency milliseconds from PVE API.",
 	}, []string{"collector"})
 
+	c.registry.StartCleanupLoop(5 * time.Second)
+
 	return &c
 }