Add log level configuration support to VirtualMCPServer

cmd/thv-operator/api/v1alpha1/virtualmcpserver_types.go

@@ -328,6 +328,13 @@ type ErrorHandling struct {
 
 // OperationalConfig defines operational settings
 type OperationalConfig struct {
+	// LogLevel sets the logging level for the Virtual MCP server
+	// Supported values: info, debug, warn, error
+	// +kubebuilder:validation:Enum=info;debug;warn;error
+	// +kubebuilder:default=info
+	// +optional
+	LogLevel string `json:"logLevel,omitempty"`
+
 	// Timeouts configures timeout settings
 	// +optional
 	Timeouts *TimeoutConfig `json:"timeouts,omitempty"`

cmd/thv-operator/controllers/virtualmcpserver_deployment.go

@@ -68,7 +68,7 @@ func (r *VirtualMCPServerReconciler) deploymentForVirtualMCPServer(
 	replicas := int32(1)
 
 	// Build deployment components using helper functions
-	args := r.buildContainerArgsForVmcp()
+	args := r.buildContainerArgsForVmcp(vmcp)
 	volumeMounts, volumes := r.buildVolumesForVmcp(vmcp)
 	env := r.buildEnvVarsForVmcp(ctx, vmcp)
 	deploymentLabels, deploymentAnnotations := r.buildDeploymentMetadataForVmcp(ls, vmcp)
@@ -128,13 +128,24 @@ func (r *VirtualMCPServerReconciler) deploymentForVirtualMCPServer(
 }
 
 // buildContainerArgsForVmcp builds the container arguments for vmcp
-func (*VirtualMCPServerReconciler) buildContainerArgsForVmcp() []string {
-	return []string{
+func (*VirtualMCPServerReconciler) buildContainerArgsForVmcp(
+	vmcp *mcpv1alpha1.VirtualMCPServer,
+) []string {
+	args := []string{
 		"serve",
 		"--config=/etc/vmcp-config/config.yaml",
 		"--host=0.0.0.0", // Listen on all interfaces for Kubernetes service routing
 		"--port=4483",    // Standard vmcp port
 	}
+
+	// Add --log-level flag (defaults to info if not specified)
+	logLevel := "info" // default
+	if vmcp.Spec.Operational != nil && vmcp.Spec.Operational.LogLevel != "" {
+		logLevel = vmcp.Spec.Operational.LogLevel
+	}
+	args = append(args, "--log-level="+logLevel)
+
+	return args
 }
 
 // buildVolumesForVmcp builds volumes and volume mounts for vmcp

cmd/thv-operator/controllers/virtualmcpserver_deployment_test.go

@@ -79,11 +79,56 @@ func TestDeploymentForVirtualMCPServer(t *testing.T) {
 func TestBuildContainerArgsForVmcp(t *testing.T) {
 	t.Parallel()
 
-	r := &VirtualMCPServerReconciler{}
-	args := r.buildContainerArgsForVmcp()
+	tests := []struct {
+		name     string
+		vmcp     *mcpv1alpha1.VirtualMCPServer
+		wantArgs []string
+	}{
+		{
+			name: "without log level (defaults to info)",
+			vmcp: &mcpv1alpha1.VirtualMCPServer{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "test-vmcp",
+					Namespace: "default",
+				},
+				Spec: mcpv1alpha1.VirtualMCPServerSpec{
+					GroupRef: mcpv1alpha1.GroupRef{
+						Name: "test-group",
+					},
+				},
+			},
+			wantArgs: []string{"serve", "--config=/etc/vmcp-config/config.yaml", "--host=0.0.0.0", "--port=4483", "--log-level=info"},
+		},
+		{
+			name: "with log level debug",
+			vmcp: &mcpv1alpha1.VirtualMCPServer{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "test-vmcp",
+					Namespace: "default",
+				},
+				Spec: mcpv1alpha1.VirtualMCPServerSpec{
+					GroupRef: mcpv1alpha1.GroupRef{
+						Name: "test-group",
+					},
+					Operational: &mcpv1alpha1.OperationalConfig{
+						LogLevel: "debug",
+					},
+				},
+			},
+			wantArgs: []string{"serve", "--config=/etc/vmcp-config/config.yaml", "--host=0.0.0.0", "--port=4483", "--log-level=debug"},
+		},
+	}
 
-	assert.Contains(t, args, "serve")
-	assert.Contains(t, args, "--config=/etc/vmcp-config/config.yaml")
+	for _, tt := range tests {
+		tt := tt // capture range variable
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			r := &VirtualMCPServerReconciler{}
+			args := r.buildContainerArgsForVmcp(tt.vmcp)
+
+			assert.Equal(t, tt.wantArgs, args)
+		})
+	}
 }
 
 // TestBuildVolumesForVmcp tests volume and volume mount generation

deploy/charts/operator-crds/Chart.yaml

@@ -2,5 +2,5 @@ apiVersion: v2
 name: toolhive-operator-crds
 description: A Helm chart for installing the ToolHive Operator CRDs into Kubernetes.
 type: application
-version: 0.0.73
+version: 0.0.74
 appVersion: "0.0.1"

deploy/charts/operator-crds/README.md

@@ -1,6 +1,6 @@
 # ToolHive Operator CRDs Helm Chart
 
-![Version: 0.0.73](https://img.shields.io/badge/Version-0.0.73-informational?style=flat-square)
+![Version: 0.0.74](https://img.shields.io/badge/Version-0.0.74-informational?style=flat-square)
 ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)
 
 A Helm chart for installing the ToolHive Operator CRDs into Kubernetes.

deploy/charts/operator-crds/crds/toolhive.stacklok.dev_virtualmcpservers.yaml

@@ -620,6 +620,17 @@ spec:
                           failures before marking unhealthy
                         type: integer
                     type: object
+                  logLevel:
+                    default: info
+                    description: |-
+                      LogLevel sets the logging level for the Virtual MCP server
+                      Supported values: info, debug, warn, error
+                    enum:
+                    - info
+                    - debug
+                    - warn
+                    - error
+                    type: string
                   timeouts:
                     description: Timeouts configures timeout settings
                     properties: