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beb.go
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beb.go
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package beb
import (
"context"
"fmt"
"time"
hydrav1alpha1 "github.com/ory/hydra-maester/api/v1alpha1"
"github.com/pkg/errors"
"go.uber.org/zap"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/dynamic"
clientgoscheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"sigs.k8s.io/controller-runtime/pkg/manager"
apigatewayv1alpha1 "github.com/kyma-incubator/api-gateway/api/v1alpha1"
eventingv1alpha1 "github.com/kyma-project/kyma/components/eventing-controller/api/v1alpha1"
"github.com/kyma-project/kyma/components/eventing-controller/logger"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/application"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/commander"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/env"
"github.com/kyma-project/kyma/components/eventing-controller/pkg/handlers"
"github.com/kyma-project/kyma/components/eventing-controller/reconciler/subscription"
)
const (
commanderName = "beb-commander"
)
// AddToScheme adds the own schemes to the runtime scheme.
func AddToScheme(scheme *runtime.Scheme) error {
if err := clientgoscheme.AddToScheme(scheme); err != nil {
return err
}
if err := eventingv1alpha1.AddToScheme(scheme); err != nil {
return err
}
if err := apigatewayv1alpha1.AddToScheme(scheme); err != nil {
return err
}
if err := hydrav1alpha1.AddToScheme(scheme); err != nil {
return err
}
return nil
}
// Commander implements the Commander interface.
type Commander struct {
cancel context.CancelFunc
envCfg env.Config
restCfg *rest.Config
metricsAddr string
resyncPeriod time.Duration
mgr manager.Manager
backend handlers.MessagingBackend
logger *logger.Logger
}
// NewCommander creates the Commander for BEB and initializes it as far as it
// does not depend on non-common options.
func NewCommander(restCfg *rest.Config, metricsAddr string, resyncPeriod time.Duration, logger *logger.Logger) *Commander {
return &Commander{
envCfg: env.GetConfig(),
restCfg: restCfg,
metricsAddr: metricsAddr,
resyncPeriod: resyncPeriod,
logger: logger,
}
}
// Init implements the Commander interface.
func (c *Commander) Init(mgr manager.Manager) error {
if len(c.envCfg.Domain) == 0 {
return fmt.Errorf("env var DOMAIN must be a non-empty value")
}
c.mgr = mgr
return nil
}
// Start implements the Commander interface and starts the manager.
func (c *Commander) Start(_ env.DefaultSubscriptionConfig, params commander.Params) error {
ctx, cancel := context.WithCancel(context.Background())
c.cancel = cancel
dynamicClient := dynamic.NewForConfigOrDie(c.restCfg)
applicationLister := application.NewLister(ctx, dynamicClient)
oauth2credential, err := getOAuth2ClientCredentials(params)
if err != nil {
return errors.Wrap(err, "get oauth2client credentials failed")
}
// Need to read env so as to read BEB related secrets
c.envCfg = env.GetConfig()
reconciler := subscription.NewReconciler(
ctx,
c.mgr.GetClient(),
applicationLister,
c.mgr.GetCache(),
c.logger,
c.mgr.GetEventRecorderFor("eventing-controller-beb"),
c.envCfg,
oauth2credential,
)
c.backend = reconciler.Backend
if err := reconciler.SetupUnmanaged(c.mgr); err != nil {
return fmt.Errorf("setup BEB subscription controller failed: %v", err)
}
return nil
}
// Stop implements the Commander interface and stops the commander.
func (c *Commander) Stop() error {
c.cancel()
dynamicClient := dynamic.NewForConfigOrDie(c.restCfg)
return cleanup(c.backend, dynamicClient, c.namedLogger())
}
func (c *Commander) namedLogger() *zap.SugaredLogger {
return c.logger.WithContext().Named(commanderName)
}
// cleanup removes all created BEB artifacts.
func cleanup(backend handlers.MessagingBackend, dynamicClient dynamic.Interface, logger *zap.SugaredLogger) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
var bebBackend *handlers.Beb
var ok bool
if bebBackend, ok = backend.(*handlers.Beb); !ok {
err := errors.New("convert backend handler to BEB handler failed")
logger.Errorw("no BEB backend exists", "error", err)
return err
}
// Fetch all subscriptions.
subscriptionsUnstructured, err := dynamicClient.Resource(handlers.SubscriptionGroupVersionResource()).Namespace(corev1.NamespaceAll).List(ctx, metav1.ListOptions{})
if err != nil {
return errors.Wrapf(err, "list subscriptions failed")
}
subs, err := handlers.ToSubscriptionList(subscriptionsUnstructured)
if err != nil {
return errors.Wrapf(err, "convert subscriptionList from unstructured list failed")
}
// Clean APIRules.
isCleanupSuccessful := true
for _, sub := range subs.Items {
if apiRule := sub.Status.APIRuleName; apiRule != "" {
if err := dynamicClient.Resource(handlers.APIRuleGroupVersionResource()).Namespace(sub.Namespace).
Delete(ctx, apiRule, metav1.DeleteOptions{}); err != nil {
isCleanupSuccessful = false
logger.Errorw("delete APIRule failed", "namespace", sub.Namespace, "name", apiRule, "error", err)
}
}
// Clean statuses.
desiredSub := handlers.RemoveStatus(sub)
if err := handlers.UpdateSubscriptionStatus(ctx, dynamicClient, desiredSub); err != nil {
isCleanupSuccessful = false
logger.Errorw("update BEB subscription status failed", "namespace", sub.Namespace, "name", sub.Name, "error", err)
}
// Clean subscriptions from BEB.
if bebBackend != nil {
if err := bebBackend.DeleteSubscription(&sub); err != nil {
isCleanupSuccessful = false
logger.Errorw("delete BEB subscription failed", "namespace", sub.Namespace, "name", sub.Name, "error", err)
}
}
}
logger.Debugw("cleanup process finished", "success", isCleanupSuccessful)
return nil
}
func getOAuth2ClientCredentials(params commander.Params) (*handlers.OAuth2ClientCredentials, error) {
val := params["client_id"]
id, ok := val.(string)
if !ok {
return nil, fmt.Errorf("expected string value for client_id, but received %T", val)
}
val = params["client_secret"]
secret, ok := val.(string)
if !ok {
return nil, fmt.Errorf("expected string value for client_secret, but received %T", val)
}
return &handlers.OAuth2ClientCredentials{
ClientID: id,
ClientSecret: secret,
}, nil
}