diff --git a/collectors/customCmdMetric.go b/collectors/customCmdMetric.go
index 5774088..ffe8b73 100644
--- a/collectors/customCmdMetric.go
+++ b/collectors/customCmdMetric.go
@@ -16,8 +16,8 @@ import (
 const CUSTOMCMDPATH = `/home/unrz139/Work/cc-metric-collector/collectors/custom`
 
 type CustomCmdCollectorConfig struct {
-	commands       []string `json:"commands"`
-	files          []string `json:"files"`
+	Commands       []string `json:"commands"`
+	Files          []string `json:"files"`
 	ExcludeMetrics []string `json:"exclude_metrics"`
 }
 
@@ -42,7 +42,7 @@ func (m *CustomCmdCollector) Init(config json.RawMessage) error {
 		}
 	}
 	m.setup()
-	for _, c := range m.config.commands {
+	for _, c := range m.config.Commands {
 		cmdfields := strings.Fields(c)
 		command := exec.Command(cmdfields[0], strings.Join(cmdfields[1:], " "))
 		command.Wait()
@@ -51,7 +51,7 @@ func (m *CustomCmdCollector) Init(config json.RawMessage) error {
 			m.commands = append(m.commands, c)
 		}
 	}
-	for _, f := range m.config.files {
+	for _, f := range m.config.Files {
 		_, err = ioutil.ReadFile(f)
 		if err == nil {
 			m.files = append(m.files, f)
diff --git a/collectors/lustreMetric.go b/collectors/lustreMetric.go
index c54c9f0..2fc2171 100644
--- a/collectors/lustreMetric.go
+++ b/collectors/lustreMetric.go
@@ -15,7 +15,7 @@ import (
 const LUSTREFILE = `/proc/fs/lustre/llite/lnec-XXXXXX/stats`
 
 type LustreCollectorConfig struct {
-	procfiles      []string `json:"procfiles"`
+	Procfiles      []string `json:"procfiles"`
 	ExcludeMetrics []string `json:"exclude_metrics"`
 }
 
@@ -48,7 +48,7 @@ func (m *LustreCollector) Init(config json.RawMessage) error {
 		"statfs":           {"statfs": 1},
 		"inode_permission": {"inode_permission": 1}}
 	m.devices = make([]string, 0)
-	for _, p := range m.config.procfiles {
+	for _, p := range m.config.Procfiles {
 		_, err := ioutil.ReadFile(p)
 		if err == nil {
 			m.devices = append(m.devices, p)
diff --git a/collectors/nfsMetric.go b/collectors/nfsMetric.go
index e3fcb5f..16a6d23 100644
--- a/collectors/nfsMetric.go
+++ b/collectors/nfsMetric.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
+
 	//	"os"
 	"os/exec"
 	"strconv"
@@ -22,14 +23,14 @@ type NfsCollector struct {
 	metricCollector
 	tags   map[string]string
 	config struct {
-		nfsutils       string   `json:"nfsutils"`
-		excludeMetrics []string `json:"exclude_metrics,omitempty"`
+		Nfsutils       string   `json:"nfsutils"`
+		ExcludeMetrics []string `json:"exclude_metrics,omitempty"`
 	}
 	data map[string]map[string]NfsCollectorData
 }
 
 func (m *NfsCollector) initStats() error {
-	cmd := exec.Command(m.config.nfsutils, "-l")
+	cmd := exec.Command(m.config.Nfsutils, "-l")
 	cmd.Wait()
 	buffer, err := cmd.Output()
 	if err == nil {
@@ -57,7 +58,7 @@ func (m *NfsCollector) initStats() error {
 }
 
 func (m *NfsCollector) updateStats() error {
-	cmd := exec.Command(m.config.nfsutils, "-l")
+	cmd := exec.Command(m.config.Nfsutils, "-l")
 	cmd.Wait()
 	buffer, err := cmd.Output()
 	if err == nil {
@@ -90,7 +91,7 @@ func (m *NfsCollector) Init(config json.RawMessage) error {
 	m.setup()
 
 	// Set default mmpmon binary
-	m.config.nfsutils = "/usr/sbin/nfsstat"
+	m.config.Nfsutils = "/usr/sbin/nfsstat"
 
 	// Read JSON configuration
 	if len(config) > 0 {
@@ -108,9 +109,9 @@ func (m *NfsCollector) Init(config json.RawMessage) error {
 		"type": "node",
 	}
 	// Check if mmpmon is in executable search path
-	_, err = exec.LookPath(m.config.nfsutils)
+	_, err = exec.LookPath(m.config.Nfsutils)
 	if err != nil {
-		return fmt.Errorf("NfsCollector.Init(): Failed to find nfsstat binary '%s': %v", m.config.nfsutils, err)
+		return fmt.Errorf("NfsCollector.Init(): Failed to find nfsstat binary '%s': %v", m.config.Nfsutils, err)
 	}
 	m.data = make(map[string]map[string]NfsCollectorData)
 	m.initStats()
@@ -128,7 +129,7 @@ func (m *NfsCollector) Read(interval time.Duration, output chan lp.CCMetric) {
 
 	for version, metrics := range m.data {
 		for name, data := range metrics {
-			if _, skip := stringArrayContains(m.config.excludeMetrics, name); skip {
+			if _, skip := stringArrayContains(m.config.ExcludeMetrics, name); skip {
 				continue
 			}
 			value := data.current - data.last
diff --git a/collectors/topprocsMetric.go b/collectors/topprocsMetric.go
index 2c573b2..dd6bff3 100644
--- a/collectors/topprocsMetric.go
+++ b/collectors/topprocsMetric.go
@@ -16,7 +16,7 @@ const MAX_NUM_PROCS = 10
 const DEFAULT_NUM_PROCS = 2
 
 type TopProcsCollectorConfig struct {
-	num_procs int `json:"num_procs"`
+	Num_procs int `json:"num_procs"`
 }
 
 type TopProcsCollector struct {
@@ -36,9 +36,9 @@ func (m *TopProcsCollector) Init(config json.RawMessage) error {
 			return err
 		}
 	} else {
-		m.config.num_procs = int(DEFAULT_NUM_PROCS)
+		m.config.Num_procs = int(DEFAULT_NUM_PROCS)
 	}
-	if m.config.num_procs <= 0 || m.config.num_procs > MAX_NUM_PROCS {
+	if m.config.Num_procs <= 0 || m.config.Num_procs > MAX_NUM_PROCS {
 		return errors.New(fmt.Sprintf("num_procs option must be set in 'topprocs' config (range: 1-%d)", MAX_NUM_PROCS))
 	}
 	m.setup()
@@ -65,7 +65,7 @@ func (m *TopProcsCollector) Read(interval time.Duration, output chan lp.CCMetric
 	}
 
 	lines := strings.Split(string(stdout), "\n")
-	for i := 1; i < m.config.num_procs+1; i++ {
+	for i := 1; i < m.config.Num_procs+1; i++ {
 		name := fmt.Sprintf("topproc%d", i)
 		y, err := lp.New(name, m.tags, m.meta, map[string]interface{}{"value": string(lines[i])}, time.Now())
 		if err == nil {