Make sure the path to known-modules.json is relative to the

system-stats-monitor.json file

config/system-stats-monitor.json

@@ -92,7 +92,7 @@
     }
   },
   "osFeature": {
-    "KnownModulesConfigPath": "config/guestosconfig/known-modules.json",
+    "KnownModulesConfigPath": "guestosconfig/known-modules.json",
     "metricsConfigs": {
       "system/os_feature": {
         "displayName": "system/os_feature"

pkg/systemstatsmonitor/README.md

@@ -92,7 +92,8 @@ UnknownModules are derived from the /proc/modules compared with the known-module
 
 And an option:
 `knownModulesConfigPath`: The path to the file that contains the known modules(default
-modules) can be set. By default, the path is set to `known-modules.json`
+modules) can be set. By default, the path is set to `guestosconfig/known-modules.json` 
+(relative to the system-stats-monitor config path).
 
 ### IP Stats (Net Dev)
 

pkg/systemstatsmonitor/system_stats_monitor.go

@@ -19,6 +19,7 @@ package systemstatsmonitor
 import (
 	"encoding/json"
 	"io/ioutil"
+	"path/filepath"
 	"time"
 
 	"github.com/golang/glog"
@@ -89,6 +90,12 @@ func NewSystemStatsMonitorOrDie(configPath string) types.Monitor {
 		ssm.memoryCollector = NewMemoryCollectorOrDie(&ssm.config.MemoryConfig)
 	}
 	if len(ssm.config.OsFeatureConfig.MetricsConfigs) > 0 {
+		// update the KnownModulesConfigPath to relative the system-stats-monitors path
+		// only when the KnownModulesConfigPath path is relative
+		if !filepath.IsAbs(ssm.config.OsFeatureConfig.KnownModulesConfigPath) {
+			ssm.config.OsFeatureConfig.KnownModulesConfigPath = filepath.Join(filepath.Dir(configPath),
+				ssm.config.OsFeatureConfig.KnownModulesConfigPath)
+		}
 		ssm.osFeatureCollector = NewOsFeatureCollectorOrDie(&ssm.config.OsFeatureConfig)
 	}
 	if len(ssm.config.NetConfig.MetricsConfigs) > 0 {

pkg/systemstatsmonitor/system_stats_monitor_test.go

@@ -28,4 +28,4 @@ func TestRegistration(t *testing.T) {
 	assert.NotPanics(t,
 		func() { problemdaemon.GetProblemDaemonHandlerOrDie(SystemStatsMonitorName) },
 		"System stats monitor failed to register itself as a problem daemon.")
-}
+}

pkg/systemstatsmonitor/types/config.go

@@ -24,7 +24,7 @@ import (
 var (
 	defaultInvokeIntervalString   = (60 * time.Second).String()
 	defaultlsblkTimeoutString     = (5 * time.Second).String()
-	defaultKnownModulesConfigPath = "config/guestosconfig/known-modules.json"
+	defaultKnownModulesConfigPath = "guestosconfig/known-modules.json"
 )
 
 type MetricConfig struct {

pkg/systemstatsmonitor/types/config_test.go

@@ -44,7 +44,7 @@ func TestApplyConfiguration(t *testing.T) {
 					LsblkTimeoutString: "5s",
 				},
 				OsFeatureConfig: OSFeatureStatsConfig{
-					KnownModulesConfigPath: "config/guestosconfig/known-modules.json",
+					KnownModulesConfigPath: "guestosconfig/known-modules.json",
 				},
 				InvokeIntervalString: "60s",
 				InvokeInterval:       60 * time.Second,
@@ -62,7 +62,7 @@ func TestApplyConfiguration(t *testing.T) {
 					LsblkTimeoutString: "5s",
 				},
 				OsFeatureConfig: OSFeatureStatsConfig{
-					KnownModulesConfigPath: "config/guestosconfig/known-modules.json",
+					KnownModulesConfigPath: "guestosconfig/known-modules.json",
 				},
 				InvokeIntervalString: "1m0s",
 				InvokeInterval:       60 * time.Second,
@@ -79,7 +79,7 @@ func TestApplyConfiguration(t *testing.T) {
 			wantedConfig: SystemStatsConfig{
 				DiskConfig: DiskStatsConfig{},
 				OsFeatureConfig: OSFeatureStatsConfig{
-					KnownModulesConfigPath: "config/guestosconfig/known-modules.json",
+					KnownModulesConfigPath: "guestosconfig/known-modules.json",
 				},
 			},
 		},