Merge pull request #241 from lfittl/add-host-kernel-version

Add separate kernelVersion field to host information

host/host.go

@@ -22,7 +22,8 @@ type InfoStat struct {
 	OS                   string `json:"os"`              // ex: freebsd, linux
 	Platform             string `json:"platform"`        // ex: ubuntu, linuxmint
 	PlatformFamily       string `json:"platformFamily"`  // ex: debian, rhel
-	PlatformVersion      string `json:"platformVersion"`
+	PlatformVersion      string `json:"platformVersion"` // version of the complete OS
+	KernelVersion        string `json:"kernelVersion"`   // version of the OS kernel (if available)
 	VirtualizationSystem string `json:"virtualizationSystem"`
 	VirtualizationRole   string `json:"virtualizationRole"` // guest or host
 	HostID               string `json:"hostid"`             // ex: uuid

host/host_darwin.go

@@ -37,6 +37,7 @@ func Info() (*InfoStat, error) {
 		ret.Platform = platform
 		ret.PlatformFamily = family
 		ret.PlatformVersion = version
+		ret.KernelVersion = version
 	}
 
 	system, role, err := Virtualization()

host/host_freebsd.go

@@ -40,6 +40,7 @@ func Info() (*InfoStat, error) {
 		ret.Platform = platform
 		ret.PlatformFamily = family
 		ret.PlatformVersion = version
+		ret.KernelVersion = version
 	}
 
 	system, role, err := Virtualization()

host/host_linux.go

@@ -44,6 +44,10 @@ func Info() (*InfoStat, error) {
 		ret.PlatformFamily = family
 		ret.PlatformVersion = version
 	}
+	kernelVersion, err := KernelVersion()
+	if err == nil {
+		ret.KernelVersion = kernelVersion
+	}
 
 	system, role, err := Virtualization()
 	if err == nil {
@@ -354,6 +358,22 @@ func PlatformInformation() (platform string, family string, version string, err
 
 }
 
+func KernelVersion() (version string, err error) {
+	filename := common.HostProc("sys/kernel/osrelease")
+	if common.PathExists(filename) {
+		contents, err := common.ReadLines(filename)
+		if err != nil {
+			return "", err
+		}
+
+		if len(contents) > 0 {
+			version = contents[0]
+		}
+	}
+
+	return version, nil
+}
+
 func getRedhatishVersion(contents []string) string {
 	c := strings.ToLower(strings.Join(contents, ""))
 

host/host_test.go

@@ -68,7 +68,7 @@ func TestHostInfoStat_String(t *testing.T) {
 		BootTime: 1447040000,
 		HostID:   "edfd25ff-3c9c-b1a4-e660-bd826495ad35",
 	}
-	e := `{"hostname":"test","uptime":3000,"bootTime":1447040000,"procs":100,"os":"linux","platform":"ubuntu","platformFamily":"","platformVersion":"","virtualizationSystem":"","virtualizationRole":"","hostid":"edfd25ff-3c9c-b1a4-e660-bd826495ad35"}`
+	e := `{"hostname":"test","uptime":3000,"bootTime":1447040000,"procs":100,"os":"linux","platform":"ubuntu","platformFamily":"","platformVersion":"","kernelVersion":"","virtualizationSystem":"","virtualizationRole":"","hostid":"edfd25ff-3c9c-b1a4-e660-bd826495ad35"}`
 	if e != fmt.Sprintf("%v", v) {
 		t.Errorf("HostInfoStat string is invalid: %v", v)
 	}