Fission MQT integration with keda (#1657)
Fission MQT integration based on Keda with Kafka connector
This commit is contained in:
Rahul Bhati
@@ -0,0 +1,540 @@
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package mqtrigger
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import (
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"context"
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"fmt"
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"os"
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"regexp"
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"strconv"
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"strings"
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"time"
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"github.com/pkg/errors"
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"go.uber.org/zap"
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appsv1 "k8s.io/api/apps/v1"
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apiv1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/client-go/dynamic"
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"k8s.io/client-go/kubernetes"
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k8sCache "k8s.io/client-go/tools/cache"
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fv1 "github.com/fission/fission/pkg/apis/core/v1"
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"github.com/fission/fission/pkg/crd"
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"github.com/fission/fission/pkg/utils"
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)
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var (
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scaledObjectGVR = schema.GroupVersionResource{
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Group: "keda.k8s.io",
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Version: "v1alpha1",
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Resource: "scaledobjects",
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}
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authTriggerGVR = schema.GroupVersionResource{
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Group: "keda.k8s.io",
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Version: "v1alpha1",
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Resource: "triggerauthentications",
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}
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matchFirstCap = regexp.MustCompile("(.)([A-Z][a-z]+)")
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matchAllCap = regexp.MustCompile("([a-z0-9])([A-Z])")
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)
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func getScaledObjectClient(namespace string) (dynamic.ResourceInterface, error) {
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dynamicClient, err := crd.GetDynamicClient()
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if err != nil {
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return nil, err
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}
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return dynamicClient.Resource(scaledObjectGVR).Namespace(namespace), nil
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}
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func getAuthTriggerClient(namespace string) (dynamic.ResourceInterface, error) {
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dynamicClient, err := crd.GetDynamicClient()
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if err != nil {
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return nil, err
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}
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return dynamicClient.Resource(scaledObjectGVR).Namespace(namespace), nil
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}
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// StartScalerManager watches for changes in MessageQueueTrigger and,
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// Based on changes, it Creates, Updates and Deletes Objects of Kind ScaledObjects, AuthenticationTriggers and Deployments
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func StartScalerManager(logger *zap.Logger, routerURL string) error {
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fissionClient, kubeClient, _, err := crd.MakeFissionClient()
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if err != nil {
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return err
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}
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err = fissionClient.WaitForCRDs()
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if err != nil {
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return errors.Wrap(err, "error waiting for CRDs")
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}
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crdClient := fissionClient.CoreV1().RESTClient()
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resyncPeriod := 30 * time.Second
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listWatch := k8sCache.NewListWatchFromClient(crdClient, "messagequeuetriggers", metav1.NamespaceAll, fields.Everything())
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_, controller := k8sCache.NewInformer(listWatch, &fv1.MessageQueueTrigger{}, resyncPeriod, k8sCache.ResourceEventHandlerFuncs{
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AddFunc: func(obj interface{}) {
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go func() {
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mqt := obj.(*fv1.MessageQueueTrigger)
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if mqt.Spec.MqtKind == "fission" {
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return
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}
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logger.Debug("Create deployment for Scaler Object", zap.Any("mqt", mqt.ObjectMeta), zap.Any("mqt.Spec", mqt.Spec))
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authenticationRef := ""
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if len(mqt.Spec.Secret) > 0 {
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authenticationRef = fmt.Sprintf("%s-auth-trigger", mqt.ObjectMeta.Name)
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err = createAuthTrigger(mqt, authenticationRef, kubeClient)
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if err != nil {
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logger.Error("Failed to create Authentication Trigger", zap.Error(err))
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return
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}
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}
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if err = createDeployment(mqt, routerURL, kubeClient); err != nil {
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logger.Error("Failed to create Deployment", zap.Error(err))
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if len(authenticationRef) > 0 {
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err = deleteAuthTrigger(authenticationRef, mqt.ObjectMeta.Namespace)
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if err != nil {
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logger.Error("Failed to delete Authentication Trigger", zap.Error(err))
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}
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}
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return
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}
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if err = createScaledObject(mqt, authenticationRef); err != nil {
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logger.Error("Failed to create ScaledObject", zap.Error(err))
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if len(authenticationRef) > 0 {
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if err = deleteAuthTrigger(authenticationRef, mqt.ObjectMeta.Namespace); err != nil {
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logger.Error("Failed to delete Authentication Trigger", zap.Error(err))
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}
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}
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if err = deleteDeployment(mqt.ObjectMeta.Name, kubeClient); err != nil {
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logger.Error("Failed to delete Deployment", zap.Error(err))
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}
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}
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}()
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},
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UpdateFunc: func(obj interface{}, newObj interface{}) {
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go func() {
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mqt := obj.(*fv1.MessageQueueTrigger)
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newMqt := newObj.(*fv1.MessageQueueTrigger)
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updated := checkAndUpdateTriggerFields(mqt, newMqt)
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if mqt.Spec.MqtKind == "fission" {
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return
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}
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if !updated {
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logger.Warn(fmt.Sprintf("%s remains unchanged. No changes found in trigger fields", mqt.ObjectMeta.Name))
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return
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}
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authenticationRef := ""
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if len(newMqt.Spec.Secret) > 0 && newMqt.Spec.Secret != mqt.Spec.Secret {
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authenticationRef = fmt.Sprintf("%s-auth-trigger", mqt.ObjectMeta.Name)
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if err = updateAuthTrigger(mqt, authenticationRef, kubeClient); err != nil {
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logger.Error("Failed to update Authentication Trigger", zap.Error(err))
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return
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}
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}
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if err = updateDeployment(mqt, routerURL, kubeClient); err != nil {
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logger.Error("Failed to Update Deployment", zap.Error(err))
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return
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}
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if err = updateScaledObject(mqt, authenticationRef); err != nil {
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logger.Error("Failed to Update ScaledObject", zap.Error(err))
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return
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}
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}()
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},
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})
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controller.Run(context.Background().Done())
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return nil
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}
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func toEnvVar(str string) string {
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envVar := matchFirstCap.ReplaceAllString(str, "${1}_${2}")
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envVar = matchAllCap.ReplaceAllString(envVar, "${1}_${2}")
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return strings.ToUpper(envVar)
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}
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func getEnvVarlist(mqt *fv1.MessageQueueTrigger, routerURL string, kubeClient kubernetes.Interface) ([]apiv1.EnvVar, error) {
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url := routerURL + "/" + strings.TrimPrefix(utils.UrlForFunction(mqt.Spec.FunctionReference.Name, mqt.ObjectMeta.Namespace), "/")
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envVars := []apiv1.EnvVar{
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{
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Name: "TOPIC",
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Value: mqt.Spec.Topic,
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},
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{
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Name: "FUNCTION_URL",
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Value: url,
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},
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{
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Name: "ERROR_TOPIC",
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Value: mqt.Spec.ErrorTopic,
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},
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{
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Name: "RESPONSE_TOPIC",
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Value: mqt.Spec.ResponseTopic,
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},
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{
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Name: "TRIGGER_NAME",
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Value: mqt.ObjectMeta.Name,
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},
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{
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Name: "MAX_RETRIES",
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Value: strconv.Itoa(mqt.Spec.MaxRetries),
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},
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{
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Name: "CONTENT_TYPE",
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Value: mqt.Spec.ContentType,
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},
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}
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// Metadata Fields
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for key, value := range mqt.Spec.Metadata {
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envVars = append(envVars, apiv1.EnvVar{
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Name: toEnvVar(key),
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Value: value,
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})
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}
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// Add Auth Fields
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secretName := mqt.Spec.Secret
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if len(secretName) > 0 {
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secret, err := kubeClient.CoreV1().Secrets(apiv1.NamespaceDefault).Get(secretName, metav1.GetOptions{})
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if err != nil {
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return nil, err
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}
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for key, value := range secret.Data {
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envVars = append(envVars, apiv1.EnvVar{
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Name: toEnvVar(key),
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Value: string(value),
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})
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}
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}
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return envVars, nil
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}
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func checkAndUpdateTriggerFields(mqt, newMqt *fv1.MessageQueueTrigger) bool {
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updated := false
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if len(newMqt.Spec.Topic) > 0 && newMqt.Spec.Topic != mqt.Spec.Topic {
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mqt.Spec.Topic = newMqt.Spec.Topic
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updated = true
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}
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if len(newMqt.Spec.ResponseTopic) > 0 && newMqt.Spec.ResponseTopic != mqt.Spec.ResponseTopic {
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mqt.Spec.ResponseTopic = newMqt.Spec.ResponseTopic
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updated = true
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}
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if len(newMqt.Spec.ErrorTopic) > 0 && newMqt.Spec.ErrorTopic != mqt.Spec.ErrorTopic {
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mqt.Spec.ErrorTopic = newMqt.Spec.ErrorTopic
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updated = true
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}
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if newMqt.Spec.MaxRetries >= 0 && newMqt.Spec.MaxRetries != mqt.Spec.MaxRetries {
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mqt.Spec.MaxRetries = newMqt.Spec.MaxRetries
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updated = true
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}
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if len(newMqt.Spec.FunctionReference.Name) > 0 && newMqt.Spec.FunctionReference.Name != mqt.Spec.FunctionReference.Name {
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mqt.Spec.FunctionReference.Name = newMqt.Spec.FunctionReference.Name
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updated = true
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}
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if len(newMqt.Spec.ContentType) > 0 && newMqt.Spec.ContentType != mqt.Spec.ContentType {
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mqt.Spec.ContentType = newMqt.Spec.ContentType
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updated = true
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}
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if *newMqt.Spec.PollingInterval >= 0 && *newMqt.Spec.PollingInterval != *mqt.Spec.PollingInterval {
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mqt.Spec.PollingInterval = newMqt.Spec.PollingInterval
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updated = true
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}
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if *newMqt.Spec.CooldownPeriod >= 0 && *newMqt.Spec.CooldownPeriod != *mqt.Spec.CooldownPeriod {
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mqt.Spec.CooldownPeriod = newMqt.Spec.CooldownPeriod
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updated = true
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}
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if *newMqt.Spec.MinReplicaCount >= 0 && *newMqt.Spec.MinReplicaCount != *mqt.Spec.MinReplicaCount {
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mqt.Spec.MinReplicaCount = newMqt.Spec.MinReplicaCount
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updated = true
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}
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if *newMqt.Spec.MaxReplicaCount >= 0 && *newMqt.Spec.MaxReplicaCount != *mqt.Spec.MaxReplicaCount {
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mqt.Spec.MaxReplicaCount = newMqt.Spec.MaxReplicaCount
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updated = true
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}
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if len(newMqt.Spec.FunctionReference.Name) > 0 && newMqt.Spec.FunctionReference.Name != mqt.Spec.FunctionReference.Name {
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newMqt.Spec.FunctionReference.Name = mqt.Spec.FunctionReference.Name
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updated = true
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}
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for key, value := range newMqt.Spec.Metadata {
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if val, ok := mqt.Spec.Metadata[key]; ok && val != value {
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mqt.Spec.Metadata[key] = value
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updated = true
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}
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}
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if len(newMqt.Spec.Secret) > 0 && newMqt.Spec.Secret != mqt.Spec.Secret {
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mqt.Spec.Secret = newMqt.Spec.Secret
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updated = true
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}
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if newMqt.Spec.MqtKind != mqt.Spec.MqtKind {
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mqt.Spec.MqtKind = newMqt.Spec.MqtKind
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updated = true
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}
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return updated
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}
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func getResourceVersion(scaledObjectName string, kedaClient dynamic.ResourceInterface) (version string, err error) {
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scaledObject, err := kedaClient.Get(scaledObjectName, metav1.GetOptions{})
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if err != nil {
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return "", err
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}
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return scaledObject.GetResourceVersion(), nil
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}
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func getAuthTriggerSpec(mqt *fv1.MessageQueueTrigger, authenticationRef string, kubeClient kubernetes.Interface) (*unstructured.Unstructured, error) {
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secret, err := kubeClient.CoreV1().Secrets(apiv1.NamespaceDefault).Get(mqt.Spec.Secret, metav1.GetOptions{})
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if err != nil {
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return nil, err
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}
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var secretTargetRefFields []interface{}
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for secretField := range secret.Data {
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secretTargetRefFields = append(secretTargetRefFields, map[string]interface{}{
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"name": mqt.Spec.Secret,
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"parameter": secretField,
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"key": secretField,
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})
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}
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authTriggerObj := &unstructured.Unstructured{
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Object: map[string]interface{}{
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"kind": "TriggerAuthentication",
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"apiVersion": "keda.k8s.io/v1alpha1",
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"metadata": map[string]interface{}{
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"name": authenticationRef,
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"namespace": mqt.ObjectMeta.Namespace,
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"ownerReferences": []interface{}{
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map[string]interface{}{
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"kind": "MessageQueueTrigger",
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"apiVersion": "fission.io/v1",
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"name": mqt.ObjectMeta.Name,
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"uid": mqt.ObjectMeta.UID,
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"blockOwnerDeletion": true,
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},
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},
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},
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"spec": map[string]interface{}{
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"secretTargetRef": secretTargetRefFields,
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},
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},
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}
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return authTriggerObj, nil
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}
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func createAuthTrigger(mqt *fv1.MessageQueueTrigger, authenticationRef string, kubeClient *kubernetes.Clientset) error {
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authTriggerObj, err := getAuthTriggerSpec(mqt, authenticationRef, kubeClient)
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if err != nil {
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return err
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}
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authTriggerClient, err := getAuthTriggerClient(mqt.ObjectMeta.Namespace)
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if err != nil {
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return err
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}
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_, err = authTriggerClient.Create(authTriggerObj, metav1.CreateOptions{})
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if err != nil {
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return err
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}
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return nil
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}
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func updateAuthTrigger(mqt *fv1.MessageQueueTrigger, authenticationRef string, kubeClient *kubernetes.Clientset) error {
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authTriggerClient, err := getAuthTriggerClient(mqt.ObjectMeta.Namespace)
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if err != nil {
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return err
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}
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oldAuthTriggerObj, err := authTriggerClient.Get(authenticationRef, metav1.GetOptions{})
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if err != nil {
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return err
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}
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resourceVersion := oldAuthTriggerObj.GetResourceVersion()
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authTriggerObj, err := getAuthTriggerSpec(mqt, authenticationRef, kubeClient)
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if err != nil {
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return err
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}
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authTriggerObj.SetResourceVersion(resourceVersion)
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_, err = authTriggerClient.Update(authTriggerObj, metav1.UpdateOptions{})
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if err != nil {
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return err
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}
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return nil
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}
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func deleteAuthTrigger(name, namespace string) error {
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authTriggerClient, err := getAuthTriggerClient(namespace)
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if err != nil {
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return err
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}
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err = authTriggerClient.Delete(name, &metav1.DeleteOptions{})
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if err != nil {
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return err
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}
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return nil
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}
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func getDeploymentSpec(mqt *fv1.MessageQueueTrigger, routerURL string, kubeClient *kubernetes.Clientset) (*appsv1.Deployment, error) {
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envVars, err := getEnvVarlist(mqt, routerURL, kubeClient)
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if err != nil {
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return nil, err
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}
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imageName := fmt.Sprintf("%s_image", string(mqt.Spec.MessageQueueType))
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image := os.Getenv(strings.ToUpper(imageName))
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blockOwnerDeletion := true
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return &appsv1.Deployment{
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ObjectMeta: metav1.ObjectMeta{
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Name: mqt.ObjectMeta.Name,
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Labels: map[string]string{
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"app": mqt.ObjectMeta.Name,
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},
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OwnerReferences: []metav1.OwnerReference{
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{
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Kind: "MessageQueueTrigger",
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APIVersion: "fission.io/v1",
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Name: mqt.ObjectMeta.Name,
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UID: mqt.ObjectMeta.UID,
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BlockOwnerDeletion: &blockOwnerDeletion,
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},
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},
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},
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Spec: appsv1.DeploymentSpec{
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Selector: &metav1.LabelSelector{
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MatchLabels: map[string]string{
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"app": mqt.ObjectMeta.Name,
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},
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},
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Template: apiv1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{
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"app": mqt.ObjectMeta.Name,
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},
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},
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Spec: apiv1.PodSpec{
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Containers: []apiv1.Container{
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{
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Name: mqt.ObjectMeta.Name,
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Image: image,
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ImagePullPolicy: "Always",
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Env: envVars,
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},
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},
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},
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},
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},
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}, nil
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}
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func createDeployment(mqt *fv1.MessageQueueTrigger, routerURL string, kubeClient *kubernetes.Clientset) error {
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deployment, err := getDeploymentSpec(mqt, routerURL, kubeClient)
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if err != nil {
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return err
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}
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_, err = kubeClient.AppsV1().Deployments(apiv1.NamespaceDefault).Create(deployment)
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if err != nil {
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return err
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}
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return nil
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}
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func updateDeployment(mqt *fv1.MessageQueueTrigger, routerURL string, kubeClient *kubernetes.Clientset) error {
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deployment, err := getDeploymentSpec(mqt, routerURL, kubeClient)
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if err != nil {
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return err
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}
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_, err = kubeClient.AppsV1().Deployments(apiv1.NamespaceDefault).Update(deployment)
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if err != nil {
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return err
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}
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return nil
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}
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func deleteDeployment(name string, kubeClient *kubernetes.Clientset) error {
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deletePolicy := metav1.DeletePropagationForeground
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||||
if err := kubeClient.AppsV1().Deployments(apiv1.NamespaceDefault).Delete(name, &metav1.DeleteOptions{
|
||||
PropagationPolicy: &deletePolicy,
|
||||
}); err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func getScaledObject(mqt *fv1.MessageQueueTrigger, authenticationRef string) *unstructured.Unstructured {
|
||||
return &unstructured.Unstructured{
|
||||
Object: map[string]interface{}{
|
||||
"kind": "ScaledObject",
|
||||
"apiVersion": "keda.k8s.io/v1alpha1",
|
||||
"metadata": map[string]interface{}{
|
||||
"name": mqt.ObjectMeta.Name,
|
||||
"namespace": mqt.ObjectMeta.Namespace,
|
||||
"ownerReferences": []interface{}{
|
||||
map[string]interface{}{
|
||||
"kind": "MessageQueueTrigger",
|
||||
"apiVersion": "fission.io/v1",
|
||||
"name": mqt.ObjectMeta.Name,
|
||||
"uid": mqt.ObjectMeta.UID,
|
||||
"blockOwnerDeletion": true,
|
||||
},
|
||||
},
|
||||
},
|
||||
"spec": map[string]interface{}{
|
||||
"cooldownPeriod": &mqt.Spec.CooldownPeriod,
|
||||
"maxReplicaCount": &mqt.Spec.MaxReplicaCount,
|
||||
"minReplicaCount": &mqt.Spec.MinReplicaCount,
|
||||
"pollingInterval": &mqt.Spec.PollingInterval,
|
||||
"scaleTargetRef": map[string]interface{}{
|
||||
"deploymentName": mqt.ObjectMeta.Name,
|
||||
},
|
||||
"triggers": []interface{}{
|
||||
map[string]interface{}{
|
||||
"type": mqt.Spec.MessageQueueType,
|
||||
"metadata": mqt.Spec.Metadata,
|
||||
"authenticationRef": map[string]interface{}{
|
||||
"name": authenticationRef,
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
}
|
||||
|
||||
func createScaledObject(mqt *fv1.MessageQueueTrigger, authenticationRef string) error {
|
||||
scaledObject := getScaledObject(mqt, authenticationRef)
|
||||
kedaClient, err := getScaledObjectClient(mqt.ObjectMeta.Namespace)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = kedaClient.Create(scaledObject, metav1.CreateOptions{})
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func updateScaledObject(mqt *fv1.MessageQueueTrigger, authenticationRef string) error {
|
||||
kedaClient, err := getScaledObjectClient(mqt.ObjectMeta.Namespace)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
oldScaledObject, err := kedaClient.Get(mqt.ObjectMeta.Name, metav1.GetOptions{})
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
resourceVersion := oldScaledObject.GetResourceVersion()
|
||||
|
||||
scaledObject := getScaledObject(mqt, authenticationRef)
|
||||
scaledObject.SetResourceVersion(resourceVersion)
|
||||
|
||||
_, err = kedaClient.Update(scaledObject, metav1.UpdateOptions{})
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
Reference in New Issue
Block a user