Merge pull request #527 from vyzigold/nodeExporter-hostname

[OSPRH-9848] enhance NodeExporter metrics

controllers/metricstorage_controller.go

@@ -96,6 +96,13 @@ type MetricStorageReconciler struct {
 	Cache      cache.Cache
 }
 
+// ConnectionInfo holds information about connection to a compute node
+type ConnectionInfo struct {
+	IP       string
+	Hostname string
+	TLS      bool
+}
+
 // GetLogger returns a logger object with a prefix of "conroller.name" and aditional controller context fields
 func (r *MetricStorageReconciler) GetLogger(ctx context.Context) logr.Logger {
 	return log.FromContext(ctx).WithName("Controllers").WithName("MetricStorage")
@@ -506,7 +513,7 @@ func (r *MetricStorageReconciler) createServiceScrapeConfig(
 	log logr.Logger,
 	description string,
 	serviceName string,
-	targets []string,
+	targets interface{},
 	tlsEnabled bool,
 ) error {
 	scrapeConfig := &monv1alpha1.ScrapeConfig{
@@ -593,30 +600,31 @@ func (r *MetricStorageReconciler) createScrapeConfigs(
 		return ctrl.Result{}, err
 	}
 
-	// ScrapeConfigs for NodeExporters
-	endpointsNonTLS, endpointsTLS, err := getMetricExporterTargets(instance, helper, telemetryv1.DefaultNodeExporterPort)
+	connectionInfo, err := getComputeNodesConnectionInfo(instance, helper)
 	if err != nil {
-		Log.Info(fmt.Sprintf("Cannot get node exporter targets. Scrape configs not created. Error: %s", err))
+		Log.Info(fmt.Sprintf("Cannot get compute node connection info. Scrape configs not created. Error: %s", err))
 	}
 
+	// ScrapeConfigs for NodeExporters
+	neTargetsTLS, neTargetsNonTLS := getNodeExporterTargets(connectionInfo)
 	// ScrapeConfig for non-tls nodes
 	neServiceName := fmt.Sprintf("%s-node-exporter", telemetry.ServiceName)
 	err = r.createServiceScrapeConfig(ctx, instance, Log, "Node Exporter",
-		neServiceName, endpointsNonTLS, false)
+		neServiceName, neTargetsNonTLS, false)
 	if err != nil {
 		return ctrl.Result{}, err
 	}
 
 	// ScrapeConfig for tls nodes
 	neServiceName = fmt.Sprintf("%s-node-exporter-tls", telemetry.ServiceName)
 	err = r.createServiceScrapeConfig(ctx, instance, Log, "Node Exporter",
-		neServiceName, endpointsTLS, true)
+		neServiceName, neTargetsTLS, true)
 	if err != nil {
 		return ctrl.Result{}, err
 	}
 
 	// kepler scrape endpoints
-	_, keplerEndpoints, err := getMetricExporterTargets(instance, helper, telemetryv1.DefaultKeplerPort)
+	keplerEndpoints, _ := getKeplerTargets(connectionInfo)
 	if err != nil {
 		Log.Info(fmt.Sprintf("Cannot get Kepler targets. Scrape configs not created. Error: %s", err))
 	}
@@ -633,6 +641,37 @@ func (r *MetricStorageReconciler) createScrapeConfigs(
 	return ctrl.Result{}, err
 }
 
+func getNodeExporterTargets(nodes []ConnectionInfo) ([]metricstorage.LabeledTarget, []metricstorage.LabeledTarget) {
+	tls := []metricstorage.LabeledTarget{}
+	nonTLS := []metricstorage.LabeledTarget{}
+	for _, node := range nodes {
+		target := metricstorage.LabeledTarget{
+			IP:       fmt.Sprintf("%s:%d", node.IP, telemetryv1.DefaultNodeExporterPort),
+			Hostname: node.Hostname,
+		}
+		if node.TLS {
+			tls = append(tls, target)
+		} else {
+			nonTLS = append(nonTLS, target)
+		}
+	}
+	return tls, nonTLS
+}
+
+func getKeplerTargets(nodes []ConnectionInfo) ([]string, []string) {
+	tls := []string{}
+	nonTLS := []string{}
+	for _, node := range nodes {
+		target := fmt.Sprintf("%s:%d", node.IP, telemetryv1.DefaultKeplerPort)
+		if node.TLS {
+			tls = append(tls, target)
+		} else {
+			nonTLS = append(nonTLS, target)
+		}
+	}
+	return tls, nonTLS
+}
+
 func (r *MetricStorageReconciler) createDashboardObjects(ctx context.Context, instance *telemetryv1.MetricStorage, eventHandler handler.EventHandler) (ctrl.Result, error) {
 	Log := r.GetLogger(ctx)
 	uiPluginObj := &obsui.UIPlugin{
@@ -795,26 +834,24 @@ func (r *MetricStorageReconciler) ensureWatches(
 	return err
 }
 
-func getMetricExporterTargets(
+func getComputeNodesConnectionInfo(
 	instance *telemetryv1.MetricStorage,
 	helper *helper.Helper,
-	defaultMetricExporterPort int32,
-) ([]string, []string, error) {
+) ([]ConnectionInfo, error) {
 	ipSetList, err := getIPSetList(instance, helper)
 	if err != nil {
-		return []string{}, []string{}, err
+		return []ConnectionInfo{}, err
 	}
 	inventorySecretList, err := getInventorySecretList(instance, helper)
 	if err != nil {
-		return []string{}, []string{}, err
+		return []ConnectionInfo{}, err
 	}
 	var address string
-	addressesNonTLS := []string{}
-	addressesTLS := []string{}
+	connectionInfo := []ConnectionInfo{}
 	for _, secret := range inventorySecretList.Items {
 		inventory, err := ansible.UnmarshalYAML(secret.Data["inventory"])
 		if err != nil {
-			return []string{}, []string{}, err
+			return []ConnectionInfo{}, err
 		}
 		nodeSetGroup := inventory.Groups[secret.Labels["openstackdataplanenodeset"]]
 		containsTelemetry := false
@@ -842,20 +879,28 @@ func getMetricExporterTargets(
 				address, _ = getAddressFromAnsibleHost(&item)
 			} else {
 				// we were unable to find an IP or HostName for a node, so we do not go further
-				return addressesNonTLS, addressesTLS, fmt.Errorf("failed to find an IP or HostName for node %s", name)
+				return connectionInfo, fmt.Errorf("failed to find an IP or HostName for node %s", name)
 			}
 			if address == "" {
 				// we were unable to find an IP or HostName for a node, so we do not go further
-				return addressesNonTLS, addressesTLS, fmt.Errorf("failed to find an IP or HostName for node %s", name)
+				return connectionInfo, fmt.Errorf("failed to find an IP or HostName for node %s", name)
 			}
 			if TLSEnabled, ok := nodeSetGroup.Vars["edpm_tls_certs_enabled"].(bool); ok && TLSEnabled {
-				addressesTLS = append(addressesTLS, fmt.Sprintf("%s:%d", address, defaultMetricExporterPort))
+				connectionInfo = append(connectionInfo, ConnectionInfo{
+					IP:       address,
+					Hostname: name,
+					TLS:      true,
+				})
 			} else {
-				addressesNonTLS = append(addressesNonTLS, fmt.Sprintf("%s:%d", address, defaultMetricExporterPort))
+				connectionInfo = append(connectionInfo, ConnectionInfo{
+					IP:       address,
+					Hostname: name,
+					TLS:      false,
+				})
 			}
 		}
 	}
-	return addressesNonTLS, addressesTLS, nil
+	return connectionInfo, nil
 }
 
 func getIPSetList(instance *telemetryv1.MetricStorage, helper *helper.Helper) (*infranetworkv1.IPSetList, error) {

pkg/metricstorage/scrape_config.go

@@ -27,11 +27,16 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
+type LabeledTarget struct {
+	IP       string
+	Hostname string
+}
+
 // ScrapeConfig creates a ScrapeConfig CR
 func ScrapeConfig(
 	instance *telemetryv1.MetricStorage,
 	labels map[string]string,
-	targets []string,
+	targets interface{},
 	tlsEnabled bool,
 ) *monv1alpha1.ScrapeConfig {
 	var scrapeInterval monv1.Duration
@@ -46,10 +51,28 @@ func ScrapeConfig(
 		scrapeInterval = telemetryv1.DefaultScrapeInterval
 	}
 
-	sort.Strings(targets)
-	var convertedTargets []monv1alpha1.Target
-	for _, t := range targets {
-		convertedTargets = append(convertedTargets, monv1alpha1.Target(t))
+	var staticConfigs []monv1alpha1.StaticConfig
+	if ips, ok := targets.([]string); ok {
+		sort.Strings(ips)
+		var convertedTargets []monv1alpha1.Target
+		for _, t := range ips {
+			convertedTargets = append(convertedTargets, monv1alpha1.Target(t))
+		}
+		staticConfigs = append(staticConfigs, monv1alpha1.StaticConfig{
+			Targets: convertedTargets,
+		})
+	} else if labeledTargets, ok := targets.([]LabeledTarget); ok {
+		sort.Slice(labeledTargets, func(i, j int) bool {
+			return labeledTargets[i].IP < labeledTargets[j].IP
+		})
+		for _, t := range labeledTargets {
+			staticConfigs = append(staticConfigs, monv1alpha1.StaticConfig{
+				Targets: []monv1alpha1.Target{monv1alpha1.Target(t.IP)},
+				Labels: map[monv1.LabelName]string{
+					"hostname": t.Hostname,
+				},
+			})
+		}
 	}
 
 	scrapeConfig := &monv1alpha1.ScrapeConfig{
@@ -82,11 +105,7 @@ func ScrapeConfig(
 				},
 			},
 			ScrapeInterval: &scrapeInterval,
-			StaticConfigs: []monv1alpha1.StaticConfig{
-				{
-					Targets: convertedTargets,
-				},
-			},
+			StaticConfigs:  staticConfigs,
 		},
 	}
 

tests/kuttl/suites/metricstorage/tests/01-assert.yaml

@@ -81,8 +81,19 @@ metadata:
   - kind: MetricStorage
     name: telemetry-kuttl
 spec:
-  staticConfigs:
-    - {}
+  scrapeInterval: 30s
+---
+apiVersion: monitoring.rhobs/v1alpha1
+kind: ScrapeConfig
+metadata:
+  labels:
+    service: metricStorage
+  name: telemetry-node-exporter-tls
+  ownerReferences:
+  - kind: MetricStorage
+    name: telemetry-kuttl
+spec:
+  scrapeInterval: 30s
 ---
 apiVersion: monitoring.rhobs/v1alpha1
 kind: ScrapeConfig

tests/kuttl/suites/metricstorage/tests/04-assert.yaml

@@ -93,8 +93,19 @@ metadata:
   - kind: MetricStorage
     name: telemetry-kuttl
 spec:
-  staticConfigs:
-    - {}
+  scrapeInterval: 40s
+---
+apiVersion: monitoring.rhobs/v1alpha1
+kind: ScrapeConfig
+metadata:
+  labels:
+    service: metricStorage
+  name: telemetry-node-exporter-tls
+  ownerReferences:
+  - kind: MetricStorage
+    name: telemetry-kuttl
+spec:
+  scrapeInterval: 40s
 ---
 apiVersion: monitoring.rhobs/v1alpha1
 kind: ScrapeConfig