source/system: Add reading vendor information

Add reading vendor information from /sys/devices/virtual/dmi/id/sys_vendor

Closes #1057

Signed-off-by: Oleg Zhurakivskyy <oleg.zhurakivskyy@intel.com>

docs/usage/customization-guide.md

@@ -976,6 +976,8 @@ The following features are available for matching:
 |                  |              | **`<sysfs-attribute>`** | string | Sysfs network interface attribute, available attributes: `dax`, `rotational`, `nr_zones`, `zoned` |
 | **`system.osrelease`** | attribute |       |            | System identification data from `/etc/os-release` |
 |                  |              | **`<parameter>`** | string | One parameter from `/etc/os-release` |
+| **`system.vendor`** | attribute |       |            | System vendor identification data from `/sys/devices/virtual/dmi/id/` |
+|                  |              | **`name`** | string | Vendor name from `/sys/devices/virtual/dmi/id/sys_vendor` |
 | **`system.name`** | attribute   |          |            | System name information |
 |                  |              | **`nodename`** | string | Name of the kubernetes node object |
 | **`usb.device`** | instance     |          |            | USB devices present in the system |

examples/nodefeature.yaml

@@ -65,6 +65,9 @@ spec:
           VERSION_ID: "22.04"
           VERSION_ID.major: "22"
           VERSION_ID.minor: "04"
+      system.vendor:
+        elements:
+          name: VendorUnknown
     flags:
       cpu.cpuid:
         elements:

source/system/system.go

@@ -43,6 +43,7 @@ const Name = "system"
 const (
 	OsReleaseFeature = "osrelease"
 	NameFeature      = "name"
+	VendorFeature    = "vendor"
 )
 
 // systemSource implements the FeatureSource and LabelSource interfaces.
@@ -101,6 +102,14 @@ func (s *systemSource) Discover() error {
 		}
 	}
 
+	// Get vendor information
+	vendor, err := getVendor()
+	if err != nil {
+		klog.ErrorS(err, "failed to get vendor")
+	} else {
+		s.features.Attributes[VendorFeature].Elements["name"] = vendor
+	}
+
 	klog.V(3).InfoS("discovered features", "featureSource", s.Name(), "features", utils.DelayedDumper(s.features))
 
 	return nil
@@ -153,6 +162,16 @@ func splitVersion(version string) map[string]string {
 	return components
 }
 
+// Read /sys/devices/virtual/dmi/id/sys_vendor
+func getVendor() (string, error) {
+	vendor, err := os.ReadFile("/sys/devices/virtual/dmi/id/sys_vendor")
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(string(vendor)), nil
+}
+
 func init() {
 	source.Register(&src)
 }