Avoid go vet warning:

struct field tag `json:"..., omitempty"` not compatible with reflect.StructTag.Get: suspicious space in struct tag value
struct field tag `json:"...", omitempty` not compatible with reflect.StructTag.Get: key:"value" pairs not separated by spaces

collectors/cpustatMetric.go

@@ -13,7 +13,7 @@ import (
 const CPUSTATFILE = `/proc/stat`
 
 type CpustatCollectorConfig struct {
-	ExcludeMetrics []string `json:"exclude_metrics, omitempty"`
+	ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
 }
 
 type CpustatCollector struct {

collectors/diskstatMetric.go

@@ -15,7 +15,7 @@ const DISKSTATFILE = `/proc/diskstats`
 const DISKSTAT_SYSFSPATH = `/sys/block`
 
 type DiskstatCollectorConfig struct {
-	ExcludeMetrics []string `json:"exclude_metrics, omitempty"`
+	ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
 }
 
 type DiskstatCollector struct {

collectors/infinibandMetric.go

@@ -22,7 +22,7 @@ const LIDFILE = `/sys/class/infiniband/mlx4_0/ports/1/lid`
 const PERFQUERY = `/usr/sbin/perfquery`
 
 type InfinibandCollectorConfig struct {
-	ExcludeDevices []string `json:"exclude_devices, omitempty"`
+	ExcludeDevices []string `json:"exclude_devices,omitempty"`
 	PerfQueryPath  string   `json:"perfquery_path"`
 }
 

collectors/loadavgMetric.go

@@ -12,7 +12,7 @@ import (
 const LOADAVGFILE = `/proc/loadavg`
 
 type LoadavgCollectorConfig struct {
-	ExcludeMetrics []string `json:"exclude_metrics, omitempty"`
+	ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
 }
 
 type LoadavgCollector struct {

collectors/nvidiaMetric.go

@@ -11,8 +11,8 @@ import (
 )
 
 type NvidiaCollectorConfig struct {
-	ExcludeMetrics []string `json:"exclude_metrics, omitempty"`
-	ExcludeDevices []string `json:"exclude_devices, omitempty"`
+	ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
+	ExcludeDevices []string `json:"exclude_devices,omitempty"`
 }
 
 type NvidiaCollector struct {

metric-collector.go

@@ -54,11 +54,11 @@ import (
 type CentralConfigFile struct {
 	Interval            int    `json:"interval"`
 	Duration            int    `json:"duration"`
-	Pidfile             string `json:"pidfile", omitempty`
+	Pidfile             string `json:"pidfile,omitempty"`
 	CollectorConfigFile string `json:"collectors"`
 	RouterConfigFile    string `json:"router"`
 	SinkConfigFile      string `json:"sinks"`
-	ReceiverConfigFile  string `json:"receivers", omitempty`
+	ReceiverConfigFile  string `json:"receivers,omitempty"`
 }
 
 func LoadCentralConfiguration(file string, config *CentralConfigFile) error {

receivers/metricReceiver.go

@@ -10,7 +10,7 @@ type ReceiverConfig struct {
 	Addr         string `json:"address"`
 	Port         string `json:"port"`
 	Database     string `json:"database"`
-	Organization string `json:"organization", omitempty`
+	Organization string `json:"organization,omitempty"`
 	Type         string `json:"type"`
 }
 

sinks/metricSink.go

@@ -7,14 +7,14 @@ import (
 
 type sinkConfig struct {
 	Type         string `json:"type"`
-	Host         string `json:"host", omitempty`
-	Port         string `json:"port", omitempty`
-	Database     string `json:"database, omitempty"`
-	User         string `json:"user, omitempty"`
-	Password     string `json:"password", omitempty`
-	Organization string `json:"organization", omitempty`
-	SSL          bool   `json:"ssl", omitempty`
-	MetaAsTags   bool   `json:"meta_as_tags", omitempty`
+	Host         string `json:"host,omitempty"`
+	Port         string `json:"port,omitempty"`
+	Database     string `json:"database,omitempty"`
+	User         string `json:"user,omitempty"`
+	Password     string `json:"password,omitempty"`
+	Organization string `json:"organization,omitempty"`
+	SSL          bool   `json:"ssl,omitempty"`
+	MetaAsTags   bool   `json:"meta_as_tags,omitempty"`
 }
 
 type sink struct {