Skip service discovery system-probe calls in cluster check runners

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: mrdoggopat

comp/core/workloadmeta/collectors/internal/process/BUILD.bazel

@@ -20,6 +20,7 @@ go_library(
             "//comp/core/telemetry/def",
             "//comp/core/telemetry/impl",
             "//comp/core/workloadmeta/def",
+            "//pkg/config/helper",
             "//pkg/config/model",
             "//pkg/discovery/core",
             "//pkg/discovery/language",
@@ -63,6 +64,7 @@ go_library(
             "//comp/core/telemetry/def",
             "//comp/core/telemetry/impl",
             "//comp/core/workloadmeta/def",
+            "//pkg/config/helper",
             "//pkg/config/model",
             "//pkg/discovery/core",
             "//pkg/discovery/language",

comp/core/workloadmeta/collectors/internal/process/process_collector.go

@@ -28,6 +28,7 @@ import (
 
 	"github.com/DataDog/datadog-agent/comp/core/config"
 	sysprobeconfig "github.com/DataDog/datadog-agent/comp/core/sysprobeconfig/def"
+	"github.com/DataDog/datadog-agent/pkg/config/helper"
 	pkgconfigmodel "github.com/DataDog/datadog-agent/pkg/config/model"
 	"github.com/DataDog/datadog-agent/pkg/languagedetection/languagemodels"
 	"github.com/DataDog/datadog-agent/pkg/process/procutil"
@@ -195,6 +196,14 @@ func (c *collector) isProcessCollectionEnabled() bool {
 
 // isServiceDiscoveryEnabled returns a boolean indicating if service discovery is enabled
 func (c *collector) isServiceDiscoveryEnabled() bool {
+	// Cluster Checks Runners are Deployment replicas, not DaemonSets, so they
+	// are never colocated with a system-probe on the same node and have no
+	// hostPath mount for its socket. Service discovery can never succeed
+	// there, so skip it entirely to avoid endlessly retrying system-probe
+	// requests and spamming "no such file or directory" error logs.
+	if helper.IsCLCRunner(c.config) {
+		return false
+	}
 	return serviceDiscoveryEnabled(c.systemProbeConfig)
 }
 

comp/core/workloadmeta/collectors/internal/process/process_collector_test.go

@@ -570,6 +570,18 @@ func TestStartConfiguration(t *testing.T) {
 			},
 			expectedError: errors.NewDisabled(componentName, "process collection, service discovery, language collection, and GPU monitoring are disabled"),
 		},
+		{
+			description: "service discovery enabled but disabled on CLC runner",
+			configOverrides: map[string]interface{}{
+				"process_config.process_collection.enabled": false,
+				"clc_runner_enabled":                        true,
+				"config_providers":                          []map[string]interface{}{{"name": "clusterchecks"}},
+			},
+			sysConfigOverrides: map[string]interface{}{
+				"discovery.enabled": true,
+			},
+			expectedError: errors.NewDisabled(componentName, "process collection, service discovery, language collection, and GPU monitoring are disabled"),
+		},
 	} {
 		t.Run(tc.description, func(t *testing.T) {
 			cfg := config.NewMock(t)