/
resource.go
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/
resource.go
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package eventsource
import (
"context"
"encoding/base64"
"encoding/json"
"fmt"
"sort"
"github.com/imdario/mergo"
"go.uber.org/zap"
appv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/argoproj/argo-events/common"
controllerscommon "github.com/argoproj/argo-events/controllers/common"
eventbusv1alpha1 "github.com/argoproj/argo-events/pkg/apis/eventbus/v1alpha1"
"github.com/argoproj/argo-events/pkg/apis/eventsource/v1alpha1"
)
// AdaptorArgs are the args needed to create a sensor deployment
type AdaptorArgs struct {
Image string
EventSource *v1alpha1.EventSource
Labels map[string]string
}
// Reconcile does the real logic
func Reconcile(client client.Client, args *AdaptorArgs, logger *zap.SugaredLogger) error {
ctx := context.Background()
eventSource := args.EventSource
eventBus := &eventbusv1alpha1.EventBus{}
eventBusName := common.DefaultEventBusName
if len(eventSource.Spec.EventBusName) > 0 {
eventBusName = eventSource.Spec.EventBusName
}
err := client.Get(ctx, types.NamespacedName{Namespace: eventSource.Namespace, Name: eventBusName}, eventBus)
if err != nil {
if apierrors.IsNotFound(err) {
eventSource.Status.MarkDeployFailed("EventBusNotFound", "EventBus not found.")
logger.Errorw("EventBus not found", "eventBusName", eventBusName, "error", err)
return fmt.Errorf("eventbus %s not found", eventBusName)
}
eventSource.Status.MarkDeployFailed("GetEventBusFailed", "Failed to get EventBus.")
logger.Errorw("failed to get EventBus", "eventBusName", eventBusName, "error", err)
return err
}
if !eventBus.Status.IsReady() {
eventSource.Status.MarkDeployFailed("EventBusNotReady", "EventBus not ready.")
logger.Errorw("event bus is not in ready status", "eventBusName", eventBusName, "error", err)
return fmt.Errorf("eventbus not ready")
}
expectedDeploy, err := buildDeployment(args, eventBus)
if err != nil {
eventSource.Status.MarkDeployFailed("BuildDeploymentSpecFailed", "Failed to build Deployment spec.")
logger.Errorw("failed to build deployment spec", "error", err)
return err
}
deploy, err := getDeployment(ctx, client, args)
if err != nil && !apierrors.IsNotFound(err) {
eventSource.Status.MarkDeployFailed("GetDeploymentFailed", "Get existing deployment failed")
logger.Errorw("error getting existing deployment", "error", err)
return err
}
if deploy != nil {
if deploy.Annotations != nil && deploy.Annotations[common.AnnotationResourceSpecHash] != expectedDeploy.Annotations[common.AnnotationResourceSpecHash] {
deploy.Spec = expectedDeploy.Spec
deploy.SetLabels(expectedDeploy.Labels)
deploy.Annotations[common.AnnotationResourceSpecHash] = expectedDeploy.Annotations[common.AnnotationResourceSpecHash]
err = client.Update(ctx, deploy)
if err != nil {
eventSource.Status.MarkDeployFailed("UpdateDeploymentFailed", "Failed to update existing deployment")
logger.Errorw("error updating existing deployment", "error", err)
return err
}
logger.Infow("deployment is updated", "deploymentName", deploy.Name)
}
} else {
err = client.Create(ctx, expectedDeploy)
if err != nil {
eventSource.Status.MarkDeployFailed("CreateDeploymentFailed", "Failed to create a deployment")
logger.Errorw("error creating a deployment", "error", err)
return err
}
logger.Infow("deployment is created", "deploymentName", expectedDeploy.Name)
}
// Service if any
existingSvc, err := getService(ctx, client, args)
if err != nil && !apierrors.IsNotFound(err) {
eventSource.Status.MarkDeployFailed("GetServiceFailed", "Failed to get existing service")
logger.Errorw("error getting existing service", "error", err)
return err
}
expectedSvc, err := buildService(args)
if err != nil {
eventSource.Status.MarkDeployFailed("BuildServiceFailed", "Failed to build service spec")
logger.Errorw("error building service spec", "error", err)
return err
}
if expectedSvc == nil {
if existingSvc != nil {
err = client.Delete(ctx, existingSvc)
if err != nil {
eventSource.Status.MarkDeployFailed("DeleteServiceFailed", "Failed to delete existing service")
logger.Errorw("error deleting existing service", "error", err)
return err
}
logger.Infow("deleted existing service", "serviceName", existingSvc.Name)
}
} else {
if existingSvc == nil {
err = client.Create(ctx, expectedSvc)
if err != nil {
eventSource.Status.MarkDeployFailed("CreateServiceFailed", "Failed to create a service")
logger.Errorw("error creating a service", "error", err)
return err
}
logger.Infow("service is created", "serviceName", expectedSvc.Name)
} else if existingSvc.Annotations != nil && existingSvc.Annotations[common.AnnotationResourceSpecHash] != expectedSvc.Annotations[common.AnnotationResourceSpecHash] {
// To avoid service updating issues such as port name change, re-create it.
err = client.Delete(ctx, existingSvc)
if err != nil {
eventSource.Status.MarkDeployFailed("DeleteServiceFailed", "Failed to delete existing service")
logger.Errorw("error deleting existing service", "error", err)
return err
}
err = client.Create(ctx, expectedSvc)
if err != nil {
eventSource.Status.MarkDeployFailed("RecreateServiceFailed", "Failed to re-create existing service")
logger.Errorw("error re-creating existing service", "error", err)
return err
}
logger.Infow("service is re-created", "serviceName", existingSvc.Name)
}
}
eventSource.Status.MarkDeployed()
return nil
}
func getDeployment(ctx context.Context, cl client.Client, args *AdaptorArgs) (*appv1.Deployment, error) {
dl := &appv1.DeploymentList{}
err := cl.List(ctx, dl, &client.ListOptions{
Namespace: args.EventSource.Namespace,
LabelSelector: labelSelector(args.Labels),
})
if err != nil {
return nil, err
}
for _, deploy := range dl.Items {
if metav1.IsControlledBy(&deploy, args.EventSource) {
return &deploy, nil
}
}
return nil, apierrors.NewNotFound(schema.GroupResource{}, "")
}
func buildDeployment(args *AdaptorArgs, eventBus *eventbusv1alpha1.EventBus) (*appv1.Deployment, error) {
deploymentSpec, err := buildDeploymentSpec(args)
if err != nil {
return nil, err
}
eventSourceCopy := &v1alpha1.EventSource{
ObjectMeta: metav1.ObjectMeta{
Namespace: args.EventSource.Namespace,
Name: args.EventSource.Name,
},
Spec: args.EventSource.Spec,
}
eventSourceBytes, err := json.Marshal(eventSourceCopy)
if err != nil {
return nil, fmt.Errorf("failed marshal eventsource spec")
}
busConfigBytes, err := json.Marshal(eventBus.Status.Config)
if err != nil {
return nil, fmt.Errorf("failed marshal event bus config: %v", err)
}
env := []corev1.EnvVar{
{
Name: common.EnvVarEventSourceObject,
Value: base64.StdEncoding.EncodeToString(eventSourceBytes),
},
{
Name: common.EnvVarEventBusSubject,
Value: fmt.Sprintf("eventbus-%s", args.EventSource.Namespace),
},
{
Name: common.EnvVarPodName,
ValueFrom: &corev1.EnvVarSource{FieldRef: &corev1.ObjectFieldSelector{FieldPath: "metadata.name"}},
},
{
Name: common.EnvVarLeaderElection,
Value: args.EventSource.Annotations[common.AnnotationLeaderElection],
},
{
Name: common.EnvVarEventBusConfig,
Value: base64.StdEncoding.EncodeToString(busConfigBytes),
},
}
volumes := []corev1.Volume{
{
Name: "tmp",
VolumeSource: corev1.VolumeSource{EmptyDir: &corev1.EmptyDirVolumeSource{}},
},
}
volumeMounts := []corev1.VolumeMount{
{
Name: "tmp",
MountPath: "/tmp",
},
}
var secretObjs []interface{}
var accessSecret *corev1.SecretKeySelector
switch {
case eventBus.Status.Config.NATS != nil:
accessSecret = eventBus.Status.Config.NATS.AccessSecret
secretObjs = []interface{}{eventSourceCopy}
case eventBus.Status.Config.JetStream != nil:
accessSecret = eventBus.Status.Config.JetStream.AccessSecret
secretObjs = []interface{}{eventSourceCopy}
case eventBus.Status.Config.Kafka != nil:
accessSecret = nil
secretObjs = []interface{}{eventSourceCopy, eventBus} // kafka requires secrets for sasl and tls
default:
return nil, fmt.Errorf("unsupported event bus")
}
if accessSecret != nil {
// Mount the secret as volume instead of using envFrom to gain the ability
// for the sensor deployment to auto reload when the secret changes
volumes = append(volumes, corev1.Volume{
Name: "auth-volume",
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: accessSecret.Name,
Items: []corev1.KeyToPath{
{
Key: accessSecret.Key,
Path: "auth.yaml",
},
},
},
},
})
volumeMounts = append(volumeMounts, corev1.VolumeMount{
Name: "auth-volume",
MountPath: common.EventBusAuthFileMountPath,
})
}
// secrets
volSecrets, volSecretMounts := common.VolumesFromSecretsOrConfigMaps(common.SecretKeySelectorType, secretObjs...)
volumes = append(volumes, volSecrets...)
volumeMounts = append(volumeMounts, volSecretMounts...)
// config maps
volConfigMaps, volCofigMapMounts := common.VolumesFromSecretsOrConfigMaps(common.ConfigMapKeySelectorType, eventSourceCopy)
volumeMounts = append(volumeMounts, volCofigMapMounts...)
volumes = append(volumes, volConfigMaps...)
// Order volumes and volumemounts based on name to make the order deterministic
sort.Slice(volumes, func(i, j int) bool {
return volumes[i].Name < volumes[j].Name
})
sort.Slice(volumeMounts, func(i, j int) bool {
return volumeMounts[i].Name < volumeMounts[j].Name
})
deploymentSpec.Template.Spec.Containers[0].Env = append(deploymentSpec.Template.Spec.Containers[0].Env, env...)
deploymentSpec.Template.Spec.Containers[0].VolumeMounts = append(deploymentSpec.Template.Spec.Containers[0].VolumeMounts, volumeMounts...)
deploymentSpec.Template.Spec.Volumes = append(deploymentSpec.Template.Spec.Volumes, volumes...)
deployment := &appv1.Deployment{
ObjectMeta: metav1.ObjectMeta{
Namespace: args.EventSource.Namespace,
GenerateName: fmt.Sprintf("%s-eventsource-", args.EventSource.Name),
Labels: mergeLabels(args.EventSource.Labels, args.Labels),
},
Spec: *deploymentSpec,
}
if err := controllerscommon.SetObjectMeta(args.EventSource, deployment, v1alpha1.SchemaGroupVersionKind); err != nil {
return nil, err
}
return deployment, nil
}
func buildDeploymentSpec(args *AdaptorArgs) (*appv1.DeploymentSpec, error) {
eventSourceContainer := corev1.Container{
Image: args.Image,
ImagePullPolicy: common.GetImagePullPolicy(),
Args: []string{"eventsource-service"},
Ports: []corev1.ContainerPort{
{Name: "metrics", ContainerPort: common.EventSourceMetricsPort},
},
}
if args.EventSource.Spec.Template != nil && args.EventSource.Spec.Template.Container != nil {
if err := mergo.Merge(&eventSourceContainer, args.EventSource.Spec.Template.Container, mergo.WithOverride); err != nil {
return nil, err
}
}
eventSourceContainer.Name = "main"
podTemplateLabels := make(map[string]string)
if args.EventSource.Spec.Template != nil && args.EventSource.Spec.Template.Metadata != nil &&
len(args.EventSource.Spec.Template.Metadata.Labels) > 0 {
for k, v := range args.EventSource.Spec.Template.Metadata.Labels {
podTemplateLabels[k] = v
}
}
for k, v := range args.Labels {
podTemplateLabels[k] = v
}
replicas := args.EventSource.Spec.GetReplicas()
spec := &appv1.DeploymentSpec{
Selector: &metav1.LabelSelector{
MatchLabels: args.Labels,
},
Replicas: &replicas,
Template: corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: podTemplateLabels,
},
Spec: corev1.PodSpec{
Containers: []corev1.Container{
eventSourceContainer,
},
},
},
}
if args.EventSource.Spec.Template != nil {
if args.EventSource.Spec.Template.Metadata != nil {
spec.Template.SetAnnotations(args.EventSource.Spec.Template.Metadata.Annotations)
}
spec.Template.Spec.ServiceAccountName = args.EventSource.Spec.Template.ServiceAccountName
spec.Template.Spec.Volumes = args.EventSource.Spec.Template.Volumes
spec.Template.Spec.SecurityContext = args.EventSource.Spec.Template.SecurityContext
spec.Template.Spec.NodeSelector = args.EventSource.Spec.Template.NodeSelector
spec.Template.Spec.Tolerations = args.EventSource.Spec.Template.Tolerations
spec.Template.Spec.Affinity = args.EventSource.Spec.Template.Affinity
spec.Template.Spec.ImagePullSecrets = args.EventSource.Spec.Template.ImagePullSecrets
spec.Template.Spec.PriorityClassName = args.EventSource.Spec.Template.PriorityClassName
spec.Template.Spec.Priority = args.EventSource.Spec.Template.Priority
}
return spec, nil
}
func getService(ctx context.Context, cl client.Client, args *AdaptorArgs) (*corev1.Service, error) {
sl := &corev1.ServiceList{}
err := cl.List(ctx, sl, &client.ListOptions{
Namespace: args.EventSource.Namespace,
LabelSelector: labelSelector(args.Labels),
})
if err != nil {
return nil, err
}
for _, svc := range sl.Items {
if metav1.IsControlledBy(&svc, args.EventSource) {
return &svc, nil
}
}
return nil, apierrors.NewNotFound(schema.GroupResource{}, "")
}
func buildService(args *AdaptorArgs) (*corev1.Service, error) {
eventSource := args.EventSource
if eventSource.Spec.Service == nil {
return nil, nil
}
if len(eventSource.Spec.Service.Ports) == 0 {
return nil, nil
}
// Use a ports copy otherwise it will update the oririnal Ports spec in EventSource
ports := []corev1.ServicePort{}
ports = append(ports, eventSource.Spec.Service.Ports...)
svc := &corev1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-eventsource-svc", eventSource.Name),
Namespace: eventSource.Namespace,
Labels: mergeLabels(args.EventSource.Labels, args.Labels),
},
Spec: corev1.ServiceSpec{
Ports: ports,
Type: corev1.ServiceTypeClusterIP,
ClusterIP: eventSource.Spec.Service.ClusterIP,
Selector: args.Labels,
},
}
if err := controllerscommon.SetObjectMeta(eventSource, svc, v1alpha1.SchemaGroupVersionKind); err != nil {
return nil, err
}
return svc, nil
}
func mergeLabels(eventBusLabels, given map[string]string) map[string]string {
result := map[string]string{}
for k, v := range eventBusLabels {
result[k] = v
}
for k, v := range given {
result[k] = v
}
return result
}
func labelSelector(labelMap map[string]string) labels.Selector {
return labels.SelectorFromSet(labelMap)
}