Allow for user to specify a list of interfaces to monitor

cmd/dellhw_exporter/dellhw_exporter.go

@@ -67,6 +67,7 @@ type CmdLineOpts struct {
 	metricsAddr        string
 	metricsPath        string
 	enabledCollectors  string
+	monitoredNics      string
 	omReportExecutable string
 	cmdTimeout         int64
 
@@ -166,7 +167,15 @@ func (p *program) Start(s service.Service) error {
 
 	collector.SetOMReport(omreport.New(omrOpts))
 
-	collectors, err := loadCollectors(opts.enabledCollectors)
+  monitoredNics := []string{}
+  if len(opts.monitoredNics) > 0 {
+    for _, nic := range strings.Split(opts.monitoredNics, ",") {
+      monitoredNics = append(monitoredNics, nic)
+      log.Infof("Adding %s to list of monitored nics", nic)
+    }
+  }
+
+	collectors, err := loadCollectors(opts.enabledCollectors, monitoredNics)
 	if err != nil {
 		log.Fatalf("Couldn't load collectors: %s", err)
 	}
@@ -205,6 +214,7 @@ func init() {
 
 	flags.BoolVar(&opts.showCollectors, "collectors-print", false, "If true, print available collectors and exit.")
 	flags.StringVar(&opts.enabledCollectors, "collectors-enabled", defaultCollectors, "Comma separated list of active collectors")
+	flags.StringVar(&opts.monitoredNics, "monitored-nics", "", "Comma separated list of nics to monitor (default is to monitor all)")
 	flags.StringVar(&opts.omReportExecutable, "collectors-omreport", getDefaultOmReportPath(), "Path to the omreport executable (based on the OS (linux or windows) default paths are used if unset)")
 	flags.Int64Var(&opts.cmdTimeout, "collectors-cmd-timeout", 15, "Command execution timeout for omreport")
 
@@ -347,14 +357,20 @@ func execute(name string, c collector.Collector, ch chan<- prometheus.Metric) {
 	ch <- prometheus.MustNewConstMetric(scrapeSuccessDesc, prometheus.GaugeValue, success, name)
 }
 
-func loadCollectors(list string) (map[string]collector.Collector, error) {
+func loadCollectors(list string, nicList []string) (map[string]collector.Collector, error) {
 	collectors := map[string]collector.Collector{}
+	var c collector.Collector
+	var err error
 	for _, name := range strings.Split(list, ",") {
 		fn, ok := collector.Factories[name]
 		if !ok {
 			return nil, fmt.Errorf("collector '%s' not available", name)
 		}
-		c, err := fn()
+		if name == "nics" {
+			c, err = fn(nicList...)
+		} else {
+			c, err = fn()
+		}
 		if err != nil {
 			return nil, err
 		}

collector/chassis.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewChassisCollector returns a new chassisCollector
-func NewChassisCollector() (Collector, error) {
+func NewChassisCollector(args ...string) (Collector, error) {
 	return &chassisCollector{}, nil
 }
 

collector/chassis_batteries.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewChassisBatteriesCollector returns a new chassisBatteriesCollector
-func NewChassisBatteriesCollector() (Collector, error) {
+func NewChassisBatteriesCollector(args ...string) (Collector, error) {
 	return &chassisBatteriesCollector{}, nil
 }
 

collector/collector.go

@@ -27,7 +27,7 @@ const Namespace = "dell_hw"
 var or *omreport.OMReport
 
 // Factories contains the list of all available collectors.
-var Factories = make(map[string]func() (Collector, error))
+var Factories = make(map[string]func(...string) (Collector, error))
 
 // Collector is the interface a collector has to implement.
 type Collector interface {

collector/fans.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewFansCollector returns a new fansCollector
-func NewFansCollector() (Collector, error) {
+func NewFansCollector(args ...string) (Collector, error) {
 	return &fansCollector{}, nil
 }
 

collector/firmwares.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewFirmwaresCollector returns a new firmwaresCollector
-func NewFirmwaresCollector() (Collector, error) {
+func NewFirmwaresCollector(args ...string) (Collector, error) {
 	return &firmwaresCollector{}, nil
 }
 

collector/memory.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewMemoryCollector returns a new memoryCollector
-func NewMemoryCollector() (Collector, error) {
+func NewMemoryCollector(args ...string) (Collector, error) {
 	return &memoryCollector{}, nil
 }
 

collector/nics.go

@@ -24,20 +24,21 @@ import (
 
 type nicsCollector struct {
 	current *prometheus.Desc
+  	nicList []string
 }
 
 func init() {
 	Factories["nics"] = NewNicsCollector
 }
 
 // NewNicsCollector returns a new nicsCollector
-func NewNicsCollector() (Collector, error) {
-	return &nicsCollector{}, nil
+func NewNicsCollector(nics ...string) (Collector, error) {
+	return &nicsCollector{nicList: nics}, nil
 }
 
 // Update Prometheus metrics
 func (c *nicsCollector) Update(ch chan<- prometheus.Metric) error {
-	nics, err := or.Nics()
+	nics, err := or.Nics(c.nicList...)
 	if err != nil {
 		return err
 	}

collector/processors.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewProcessorsCollector returns a new processorsCollector
-func NewProcessorsCollector() (Collector, error) {
+func NewProcessorsCollector(args ...string) (Collector, error) {
 	return &processorsCollector{}, nil
 }
 

collector/ps.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewPsCollector returns new psCollector
-func NewPsCollector() (Collector, error) {
+func NewPsCollector(args ...string) (Collector, error) {
 	return &psCollector{}, nil
 }
 

collector/ps_amps_sysboard_pwr.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewPsAmpsSysboardPwrCollector returns a new psAmpsSysboardPwrCollector
-func NewPsAmpsSysboardPwrCollector() (Collector, error) {
+func NewPsAmpsSysboardPwrCollector(args ...string) (Collector, error) {
 	return &psAmpsSysboardPwrCollector{}, nil
 }
 

collector/storage_battery.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewStorageBatteryCollector returns a new storageBatteryCollector
-func NewStorageBatteryCollector() (Collector, error) {
+func NewStorageBatteryCollector(args ...string) (Collector, error) {
 	return &storageBatteryCollector{}, nil
 }
 

collector/storage_controller.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewStorageControllerCollector returns a new storageControllerCollector
-func NewStorageControllerCollector() (Collector, error) {
+func NewStorageControllerCollector(args ...string) (Collector, error) {
 	return &storageControllerCollector{}, nil
 }
 

collector/storage_enclosure.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewStorageEnclosureCollector returns a new storageEnclosureCollector
-func NewStorageEnclosureCollector() (Collector, error) {
+func NewStorageEnclosureCollector(args ...string) (Collector, error) {
 	return &storageEnclosureCollector{}, nil
 }
 

collector/storage_pdisk.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewStoragePdiskCollector returns a new storagePdiskCollector
-func NewStoragePdiskCollector() (Collector, error) {
+func NewStoragePdiskCollector(args ...string) (Collector, error) {
 	return &storagePdiskCollector{}, nil
 }
 

collector/storage_vdisk.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewStorageVdiskCollector returns a new storageVdiskCollector
-func NewStorageVdiskCollector() (Collector, error) {
+func NewStorageVdiskCollector(args ...string) (Collector, error) {
 	return &storageVdiskCollector{}, nil
 }
 

collector/system.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewSystemCollector returns a new systemCollector
-func NewSystemCollector() (Collector, error) {
+func NewSystemCollector(args ...string) (Collector, error) {
 	return &systemCollector{}, nil
 }
 

collector/temps.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewTempsCollector returns a new tempsCollector
-func NewTempsCollector() (Collector, error) {
+func NewTempsCollector(args ...string) (Collector, error) {
 	return &tempsCollector{}, nil
 }
 

collector/volts.go

@@ -31,7 +31,7 @@ func init() {
 }
 
 // NewVoltsCollector returns a new voltsCollector
-func NewVoltsCollector() (Collector, error) {
+func NewVoltsCollector(args ...string) (Collector, error) {
 	return &voltsCollector{}, nil
 }
 

pkg/omreport/omreport.go

@@ -420,8 +420,19 @@ func (or *OMReport) Ps() ([]Value, error) {
 }
 
 // Nics returns the connection status of the NICs
-func (or *OMReport) Nics() ([]Value, error) {
+func (or *OMReport) Nics(nicList ...string) ([]Value, error) {
 	values := []Value{}
+  monitorAllNics := false
+  monitoredNics := make(map[string]bool)
+
+  if len(nicList) == 0 {
+    monitorAllNics = true
+  }
+
+  for _, nic := range nicList {
+    monitoredNics[nic] = true
+  }
+
 	err := or.readReport(func(fields []string) {
 		if len(fields) < 5 || fields[0] == indexField {
 			return
@@ -434,11 +445,14 @@ func (or *OMReport) Nics() ([]Value, error) {
 		} else {
 			ret = "1"
 		}
-		values = append(values, Value{
-			Name:   "nic_status",
-			Value:  ret,
-			Labels: ts,
-		})
+    dev := ts["device"]
+    if monitorAllNics || monitoredNics[dev] {
+      values = append(values, Value{
+        Name:   "nic_status",
+        Value:  ret,
+        Labels: ts,
+      })
+    }
 	}, or.getOMReportExecutable(), "chassis", "nics")
 	return values, err
 }