crd: Expose "DefaultRuntimeClassName" to the CcInstallConfig

This will allow users to define which runtime class they want to be used
as the default "kata" one.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

api/v1beta1/ccruntime_types.go

@@ -162,6 +162,12 @@ type CcInstallConfig struct {
 	// +optional
 	RuntimeClassNames []string `json:"runtimeClassNames,omitempty"`
 
+	// This specifies the RuntimeClass to be used as the default one
+	// If not set, the default "kata" runtime class will NOT be created. Otherwise, the default "kata" runtime class will be created
+	// as as "alias" for the value set here
+	// +optional
+	DefaultRuntimeClassName string `json:"defaultRuntimeClassName,omitempty"`
+
 	// This specifies whether the CcRuntime (kata or enclave-cc) will be running on debug mode
 	// +optional
 	Debug bool `json:"debug,omitempty"`

config/crd/bases/confidentialcontainers.org_ccruntimes.yaml

@@ -106,6 +106,12 @@ spec:
                     description: This specifies whether the CcRuntime (kata or enclave-cc)
                       will be running on debug mode
                     type: boolean
+                  defaultRuntimeClassName:
+                    description: This specifies the RuntimeClass to be used as the
+                      default one If not set, the default "kata" runtime class will
+                      NOT be created. Otherwise, the default "kata" runtime class
+                      will be created as as "alias" for the value set here
+                    type: string
                   environmentVariables:
                     description: This specifies the environment variables required
                       by the daemon set

controllers/ccruntime_controller.go

@@ -654,11 +654,27 @@ func (r *CcRuntimeReconciler) processDaemonset(operation DaemonOperation) *appsv
 
 	var debug = strconv.FormatBool(r.ccRuntime.Spec.Config.Debug)
 
+	var defaultShim = ""
+	var createDefaultRuntimeClass = "false"
+	if strings.HasPrefix(r.ccRuntime.Spec.Config.DefaultRuntimeClassName, "kata-") {
+		// Remove the "kata-" prefix from DefaultRuntimeClassName
+		defaultShim = strings.TrimPrefix(r.ccRuntime.Spec.Config.DefaultRuntimeClassName, "kata-")
+		createDefaultRuntimeClass = "true"
+	}
+
 	var envVars = []corev1.EnvVar{
 		{
 			Name:  "DEBUG",
 			Value: debug,
 		},
+		{
+			Name:  "DEFAULT_SHIM",
+			Value: defaultShim,
+		},
+		{
+			Name:  "CREATE_DEFAULT_RUNTIMECLASS",
+			Value: createDefaultRuntimeClass,
+		},
 	}
 	envVars = append(envVars, r.ccRuntime.Spec.Config.EnvironmentVariables...)