Return error at Init for skip collectors early

collectors/cpustatMetric.go

@@ -13,9 +13,10 @@ type CpustatCollector struct {
 	MetricCollector
 }
 
-func (m *CpustatCollector) Init() {
+func (m *CpustatCollector) Init() error {
 	m.name = "CpustatCollector"
 	m.setup()
+	return nil
 }
 
 func ParseStatLine(line string, out map[string]interface{}) {

collectors/infinibandMetric.go

@@ -16,9 +16,11 @@ type InfinibandCollector struct {
 	MetricCollector
 }
 
-func (m *InfinibandCollector) Init() {
+func (m *InfinibandCollector) Init() error {
 	m.name = "InfinibandCollector"
 	m.setup()
+	_, err := ioutil.ReadFile(string(LIDFILE))
+	return err
 }
 
 func (m *InfinibandCollector) Read(interval time.Duration) {

collectors/likwidMetric.go

@@ -71,7 +71,7 @@ func getSocketCpus() map[C.int]int {
 	return outmap
 }
 
-func (m *LikwidCollector) Init() {
+func (m *LikwidCollector) Init() error {
 	m.name = "LikwidCollector"
 	m.setup()
 	cpulist := CpuList()
@@ -111,6 +111,7 @@ func (m *LikwidCollector) Init() {
 		}
 		C.free(unsafe.Pointer(cstr))
 	}
+	return nil
 }
 
 func (m *LikwidCollector) Read(interval time.Duration) {

collectors/loadavgMetric.go

@@ -13,9 +13,10 @@ type LoadavgCollector struct {
 	MetricCollector
 }
 
-func (m *LoadavgCollector) Init() {
+func (m *LoadavgCollector) Init() error {
 	m.name = "LoadavgCollector"
 	m.setup()
+	return nil
 }
 
 func (m *LoadavgCollector) Read(interval time.Duration) {

collectors/lustreMetric.go

@@ -14,9 +14,11 @@ type LustreCollector struct {
 	MetricCollector
 }
 
-func (m *LustreCollector) Init() {
+func (m *LustreCollector) Init() error {
 	m.name = "LustreCollector"
 	m.setup()
+	_, err := ioutil.ReadFile(string(LUSTREFILE))
+	return err
 }
 
 func (m *LustreCollector) Read(interval time.Duration) {

collectors/memstatMetric.go

@@ -15,9 +15,10 @@ type MemstatCollector struct {
 	MetricCollector
 }
 
-func (m *MemstatCollector) Init() {
+func (m *MemstatCollector) Init() error {
 	m.name = "MemstatCollector"
 	m.setup()
+	return nil
 }
 
 func (m *MemstatCollector) Read(interval time.Duration) {

collectors/metricCollector.go

@@ -10,7 +10,7 @@ import (
 
 type MetricGetter interface {
 	Name() string
-	Init()
+	Init() error
 	Read(time.Duration)
 	Close()
 	GetNodeMetric() map[string]interface{}

collectors/netstatMetric.go

@@ -15,9 +15,10 @@ type NetstatCollector struct {
 	MetricCollector
 }
 
-func (m *NetstatCollector) Init() {
+func (m *NetstatCollector) Init() error {
 	m.name = "NetstatCollector"
 	m.setup()
+	return nil
 }
 
 func (m *NetstatCollector) Read(interval time.Duration) {

collectors/topprocsMetric.go

@@ -14,9 +14,10 @@ type TopProcsCollector struct {
 	MetricCollector
 }
 
-func (m *TopProcsCollector) Init() {
+func (m *TopProcsCollector) Init() error {
 	m.name = "TopProcsCollector"
 	m.setup()
+	return nil
 }
 
 func (m *TopProcsCollector) Read(interval time.Duration) {