[processor/resourcedetection] Fetch CPU info only if required

.chloggen/call_cpu_info_only_on_demand.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: resourcedetectionprocessor
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fetch CPU info only if related attributes are enabled
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [33774]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

internal/metadataproviders/go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/docker/docker v25.0.5+incompatible
 	github.com/hashicorp/consul/api v1.29.1
 	github.com/open-telemetry/opentelemetry-collector-contrib/internal/k8sconfig v0.103.0
+	github.com/shirou/gopsutil/v4 v4.24.5
 	github.com/stretchr/testify v1.9.0
 	go.opentelemetry.io/collector/semconv v0.103.0
 	go.opentelemetry.io/otel v1.27.0
@@ -32,6 +33,7 @@ require (
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/go-ole/go-ole v1.2.6 // indirect
 	github.com/go-openapi/jsonpointer v0.19.6 // indirect
 	github.com/go-openapi/jsonreference v0.20.2 // indirect
 	github.com/go-openapi/swag v0.22.3 // indirect
@@ -53,6 +55,7 @@ require (
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
@@ -69,8 +72,13 @@ require (
 	github.com/openshift/client-go v0.0.0-20210521082421-73d9475a9142 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
+	github.com/shoenig/go-m1cpu v0.1.6 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
+	github.com/tklauser/go-sysconf v0.3.12 // indirect
+	github.com/tklauser/numcpus v0.6.1 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.49.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.24.0 // indirect
 	go.opentelemetry.io/otel/metric v1.27.0 // indirect

internal/metadataproviders/system/metadata.go

@@ -12,6 +12,7 @@ import (
 	"strings"
 
 	"github.com/Showmax/go-fqdn"
+	"github.com/shirou/gopsutil/v4/cpu"
 	conventions "go.opentelemetry.io/collector/semconv/v1.6.1"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/sdk/resource"
@@ -69,6 +70,9 @@ type Provider interface {
 
 	// HostMACs returns the host's MAC addresses
 	HostMACs() ([]net.HardwareAddr, error)
+
+	// CPUInfo returns the host's CPU info
+	CPUInfo() ([]cpu.InfoStat, error)
 }
 
 type systemMetadataProvider struct {
@@ -216,3 +220,7 @@ func (p systemMetadataProvider) HostMACs() (macs []net.HardwareAddr, err error)
 	}
 	return macs, err
 }
+
+func (p systemMetadataProvider) CPUInfo() ([]cpu.InfoStat, error) {
+	return cpu.Info()
+}

processor/resourcedetectionprocessor/internal/system/system.go

@@ -130,9 +130,14 @@ func (d *Detector) Detect(ctx context.Context) (resource pcommon.Resource, schem
 		return pcommon.NewResource(), "", fmt.Errorf("failed getting OS description: %w", err)
 	}
 
-	cpuInfo, err := cpu.Info()
-	if err != nil {
-		return pcommon.NewResource(), "", fmt.Errorf("failed getting host cpuinfo: %w", err)
+	var cpuInfo []cpu.InfoStat
+	if d.cfg.ResourceAttributes.HostCPUCacheL2Size.Enabled || d.cfg.ResourceAttributes.HostCPUFamily.Enabled ||
+		d.cfg.ResourceAttributes.HostCPUModelID.Enabled || d.cfg.ResourceAttributes.HostCPUVendorID.Enabled ||
+		d.cfg.ResourceAttributes.HostCPUModelName.Enabled || d.cfg.ResourceAttributes.HostCPUStepping.Enabled {
+		cpuInfo, err = d.provider.CPUInfo()
+		if err != nil {
+			return pcommon.NewResource(), "", fmt.Errorf("failed getting host cpuinfo: %w", err)
+		}
 	}
 
 	for _, source := range d.cfg.HostnameSources {

processor/resourcedetectionprocessor/internal/system/system_test.go

@@ -9,6 +9,7 @@ import (
 	"net"
 	"testing"
 
+	"github.com/shirou/gopsutil/v4/cpu"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
@@ -77,6 +78,11 @@ func (m *mockMetadata) HostMACs() ([]net.HardwareAddr, error) {
 	return args.Get(0).([]net.HardwareAddr), args.Error(1)
 }
 
+func (m *mockMetadata) CPUInfo() ([]cpu.InfoStat, error) {
+	args := m.MethodCalled("CPUInfo")
+	return args.Get(0).([]cpu.InfoStat), args.Error(1)
+}
+
 var (
 	testIPsAttribute = []any{"192.168.1.140", "fe80::abc2:4a28:737a:609e"}
 	testIPsAddresses = []net.IP{net.ParseIP(testIPsAttribute[0].(string)), net.ParseIP(testIPsAttribute[1].(string))}
@@ -159,6 +165,7 @@ func TestDetectFQDNAvailable(t *testing.T) {
 	require.NoError(t, err)
 	assert.Equal(t, conventions.SchemaURL, schemaURL)
 	md.AssertExpectations(t)
+	md.AssertNotCalled(t, "CPUInfo")
 
 	expected := map[string]any{
 		conventions.AttributeHostName:      "fqdn",
@@ -330,6 +337,40 @@ func TestDetectError(t *testing.T) {
 	}, res.Attributes().AsRaw())
 }
 
+func TestDetectCPUInfo(t *testing.T) {
+	md := &mockMetadata{}
+	md.On("FQDN").Return("fqdn", nil)
+	md.On("OSDescription").Return("Ubuntu 22.04.2 LTS (Jammy Jellyfish)", nil)
+	md.On("OSType").Return("darwin", nil)
+	md.On("HostID").Return("2", nil)
+	md.On("HostArch").Return("amd64", nil)
+	md.On("HostIPs").Return(testIPsAddresses, nil)
+	md.On("HostMACs").Return(testMACsAddresses, nil)
+	md.On("CPUInfo").Return([]cpu.InfoStat{{Family: "some"}}, nil)
+
+	cfg := allEnabledConfig()
+	cfg.HostCPUFamily.Enabled = true
+	detector := newTestDetector(md, []string{"dns"}, cfg)
+	res, schemaURL, err := detector.Detect(context.Background())
+	require.NoError(t, err)
+	assert.Equal(t, conventions.SchemaURL, schemaURL)
+	md.AssertExpectations(t)
+
+	expected := map[string]any{
+		conventions.AttributeHostName:      "fqdn",
+		conventions.AttributeOSDescription: "Ubuntu 22.04.2 LTS (Jammy Jellyfish)",
+		conventions.AttributeOSType:        "darwin",
+		conventions.AttributeHostID:        "2",
+		conventions.AttributeHostArch:      conventions.AttributeHostArchAMD64,
+		"host.ip":                          testIPsAttribute,
+		"host.mac":                         testMACsAttribute,
+		"host.cpu.family":                  "some",
+	}
+
+	assert.Equal(t, expected, res.Attributes().AsRaw())
+
+}
+
 func newTestDetector(mock *mockMetadata, hostnameSources []string, resCfg metadata.ResourceAttributesConfig) *Detector {
 	return &Detector{
 		provider: mock,