add metric for subnet info

pkg/controller/controller.go

@@ -1041,7 +1041,7 @@ func (c *Controller) startWorkers(ctx context.Context) {
 	}
 
 	go wait.Until(c.resyncProviderNetworkStatus, 30*time.Second, ctx.Done())
-	go wait.Until(c.resyncSubnetMetrics, 30*time.Second, ctx.Done())
+	go wait.Until(c.exportSubnetMetrics, 30*time.Second, ctx.Done())
 	go wait.Until(c.CheckGatewayReady, 5*time.Second, ctx.Done())
 
 	go wait.Until(c.runAddOvnEipWorker, time.Second, ctx.Done())

pkg/controller/exporter.go

@@ -2,12 +2,15 @@ package controller
 
 import (
 	"math"
+	"strconv"
+	"strings"
 	"sync"
 
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/klog/v2"
 
 	kubeovnv1 "github.com/kubeovn/kube-ovn/pkg/apis/kubeovn/v1"
+	"github.com/kubeovn/kube-ovn/pkg/ovsdb/ovnnb"
 )
 
 var registerMetricsOnce sync.Once
@@ -19,23 +22,32 @@ func (c *Controller) registerSubnetMetrics() {
 	})
 }
 
-// resyncSubnetMetrics start to update subnet metrics
-func (c *Controller) resyncSubnetMetrics() {
-	c.exportSubnetMetrics()
+func resetSubnetMetrics() {
+	metricSubnetAvailableIPs.Reset()
+	metricSubnetUsedIPs.Reset()
+	metricCentralSubnetInfo.Reset()
+	metricSubnetIPAMInfo.Reset()
+	metricSubnetIPAssignedInfo.Reset()
 }
 
-func (c *Controller) exportSubnetMetrics() bool {
+func (c *Controller) exportSubnetMetrics() {
 	subnets, err := c.subnetsLister.List(labels.Everything())
 	if err != nil {
 		klog.Errorf("failed to list subnet, %v", err)
-		return false
+		return
 	}
+
+	resetSubnetMetrics()
 	for _, subnet := range subnets {
 		c.exportSubnetAvailableIPsGauge(subnet)
 		c.exportSubnetUsedIPsGauge(subnet)
-	}
+		c.exportSubnetIPAMInfo(subnet)
+		c.exportSubnetIPAssignedInfo(subnet)
 
-	return true
+		if subnet.Spec.GatewayType == kubeovnv1.GWCentralizedType {
+			c.exportCentralizedSubnetInfo(subnet)
+		}
+	}
 }
 
 func (c *Controller) exportSubnetAvailableIPsGauge(subnet *kubeovnv1.Subnet) {
@@ -60,3 +72,57 @@ func (c *Controller) exportSubnetUsedIPsGauge(subnet *kubeovnv1.Subnet) {
 	}
 	metricSubnetUsedIPs.WithLabelValues(subnet.Name, subnet.Spec.Protocol, subnet.Spec.CIDRBlock).Set(usingIPs)
 }
+
+func (c *Controller) exportCentralizedSubnetInfo(subnet *kubeovnv1.Subnet) {
+	lrPolicyList, err := c.OVNNbClient.GetLogicalRouterPoliciesByExtID(c.config.ClusterRouter, "subnet", subnet.Name)
+	if err != nil {
+		klog.Errorf("failed to list lr policy for subnet %s: %v", subnet.Name, err)
+		return
+	}
+
+	for _, lrPolicy := range lrPolicyList {
+		if lrPolicy.Action == ovnnb.LogicalRouterPolicyActionReroute {
+			metricCentralSubnetInfo.WithLabelValues(subnet.Name, strconv.FormatBool(subnet.Spec.EnableEcmp), subnet.Spec.GatewayNode, subnet.Status.ActivateGateway, lrPolicy.Match, strings.Join(lrPolicy.Nexthops, ",")).Set(1)
+			break
+		}
+	}
+}
+
+func (c *Controller) exportSubnetIPAMInfo(subnet *kubeovnv1.Subnet) {
+	ipamSubnet, ok := c.ipam.Subnets[subnet.Name]
+	if !ok {
+		klog.Errorf("failed to get subnet %s in ipam", subnet.Name)
+		return
+	}
+
+	switch subnet.Spec.Protocol {
+	case kubeovnv1.ProtocolIPv4:
+		metricSubnetIPAMInfo.WithLabelValues(subnet.Name, subnet.Spec.CIDRBlock, ipamSubnet.V4Free.String(), ipamSubnet.V4Reserved.String(), ipamSubnet.V4Available.String(), ipamSubnet.V4Using.String()).Set(1)
+
+	case kubeovnv1.ProtocolIPv6:
+		metricSubnetIPAMInfo.WithLabelValues(subnet.Name, subnet.Spec.CIDRBlock, ipamSubnet.V6Free.String(), ipamSubnet.V6Reserved.String(), ipamSubnet.V6Available.String(), ipamSubnet.V6Using.String()).Set(1)
+
+	case kubeovnv1.ProtocolDual:
+		metricSubnetIPAMInfo.WithLabelValues(subnet.Name, subnet.Spec.CIDRBlock, ipamSubnet.V4Free.String(), ipamSubnet.V4Reserved.String(), ipamSubnet.V4Available.String(), ipamSubnet.V4Using.String()).Set(1)
+		metricSubnetIPAMInfo.WithLabelValues(subnet.Name, subnet.Spec.CIDRBlock, ipamSubnet.V6Free.String(), ipamSubnet.V6Reserved.String(), ipamSubnet.V6Available.String(), ipamSubnet.V6Using.String()).Set(1)
+	}
+}
+
+func (c *Controller) exportSubnetIPAssignedInfo(subnet *kubeovnv1.Subnet) {
+	ipamSubnet, ok := c.ipam.Subnets[subnet.Name]
+	if !ok {
+		klog.Errorf("failed to get subnet %s in ipam", subnet.Name)
+		return
+	}
+
+	if subnet.Spec.Protocol == kubeovnv1.ProtocolIPv4 || subnet.Spec.Protocol == kubeovnv1.ProtocolDual {
+		for ip, pod := range ipamSubnet.V4IPToPod {
+			metricSubnetIPAssignedInfo.WithLabelValues(subnet.Name, ip, pod).Set(1)
+		}
+	}
+	if subnet.Spec.Protocol == kubeovnv1.ProtocolIPv6 || subnet.Spec.Protocol == kubeovnv1.ProtocolDual {
+		for ip, pod := range ipamSubnet.V6IPToPod {
+			metricSubnetIPAssignedInfo.WithLabelValues(subnet.Name, ip, pod).Set(1)
+		}
+	}
+}

pkg/controller/net_metrics.go

@@ -24,9 +24,51 @@ var (
 			"protocol",
 			"subnet_cidr",
 		})
+
+	metricCentralSubnetInfo = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "centralized_subnet_info",
+			Help: "Provide information for centralized subnet.",
+		},
+		[]string{
+			"subnet_name",
+			"enable_ecmp",
+			"gateway_node",
+			"active_gateway",
+			"match",
+			"nexthops",
+		})
+
+	metricSubnetIPAMInfo = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "subnet_ipam_info",
+			Help: "Provide information for subnet ip address management.",
+		},
+		[]string{
+			"subnet_name",
+			"cidr",
+			"free",
+			"reserved",
+			"available",
+			"using",
+		})
+
+	metricSubnetIPAssignedInfo = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "subnet_ip_assign_info",
+			Help: "Provide information for subnet ip address assigned info.",
+		},
+		[]string{
+			"subnet_name",
+			"ip",
+			"pod_name",
+		})
 )
 
 func registerMetrics() {
 	prometheus.MustRegister(metricSubnetAvailableIPs)
 	prometheus.MustRegister(metricSubnetUsedIPs)
+	prometheus.MustRegister(metricCentralSubnetInfo)
+	prometheus.MustRegister(metricSubnetIPAMInfo)
+	prometheus.MustRegister(metricSubnetIPAssignedInfo)
 }