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jaeger_controller.go
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/
jaeger_controller.go
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package jaeger
import (
"context"
"fmt"
"reflect"
"strings"
"time"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"github.com/spf13/viper"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
"github.com/jaegertracing/jaeger-operator/pkg/apis/jaegertracing/v1"
"github.com/jaegertracing/jaeger-operator/pkg/strategy"
)
// Add creates a new Jaeger Controller and adds it to the Manager. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
func Add(mgr manager.Manager) error {
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
return &ReconcileJaeger{client: mgr.GetClient(), scheme: mgr.GetScheme()}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New("jaeger-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource Jaeger
err = c.Watch(&source.Kind{Type: &v1.Jaeger{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
return nil
}
var _ reconcile.Reconciler = &ReconcileJaeger{}
// ReconcileJaeger reconciles a Jaeger object
type ReconcileJaeger struct {
// This client, initialized using mgr.Client() above, is a split client
// that reads objects from the cache and writes to the apiserver
client client.Client
scheme *runtime.Scheme
strategyChooser func(*v1.Jaeger) strategy.S
}
// Reconcile reads that state of the cluster for a Jaeger object and makes changes based on the state read
// and what is in the Jaeger.Spec
// Note:
// The Controller will requeue the Request to be processed again if the returned error is non-nil or
// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
func (r *ReconcileJaeger) Reconcile(request reconcile.Request) (reconcile.Result, error) {
execution := time.Now().UTC()
log.WithFields(log.Fields{
"namespace": request.Namespace,
"instance": request.Name,
"execution": execution,
}).Debug("Reconciling Jaeger")
// Fetch the Jaeger instance
instance := &v1.Jaeger{}
err := r.client.Get(context.Background(), request.NamespacedName, instance)
if err != nil {
if k8serrors.IsNotFound(err) {
// Request object not found, could have been deleted after reconcile request.
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
if err := validate(instance); err != nil {
instance.Logger().WithError(err).Error("Failed to validate")
return reconcile.Result{}, err
}
// workaround for https://github.com/kubernetes-sigs/controller-runtime/issues/202
// see also: https://github.com/kubernetes-sigs/controller-runtime/pull/212
// once there's a version incorporating the PR above, the manual setting of the GKV can be removed
instance.APIVersion = fmt.Sprintf("%s/%s", v1.SchemeGroupVersion.Group, v1.SchemeGroupVersion.Version)
instance.Kind = "Jaeger"
originalInstance := *instance
opts := client.MatchingLabels(map[string]string{
"app.kubernetes.io/instance": instance.Name,
"app.kubernetes.io/managed-by": "jaeger-operator",
})
list := &corev1.SecretList{}
if err := r.client.List(context.Background(), opts, list); err != nil {
return reconcile.Result{}, err
}
str := r.runStrategyChooser(instance, list.Items)
logFields := instance.Logger().WithField("execution", execution)
if err := r.apply(*instance, str); err != nil {
logFields.WithError(err).Error("failed to apply the changes")
return reconcile.Result{}, err
}
if !reflect.DeepEqual(originalInstance, *instance) {
// we store back the changed CR, so that what is stored reflects what is being used
if err := r.client.Update(context.Background(), instance); err != nil {
logFields.WithError(err).Error("failed to store back the current CustomResource")
return reconcile.Result{}, err
}
}
log.WithFields(log.Fields{
"namespace": request.Namespace,
"instance": request.Name,
"execution": execution,
}).Debug("Reconciling Jaeger completed - reschedule in 5 seconds")
return reconcile.Result{}, nil
}
// validate validates CR before processing it
func validate(jaeger *v1.Jaeger) error {
if jaeger.Spec.Storage.Rollover.ReadTTL != "" {
if _, err := time.ParseDuration(jaeger.Spec.Storage.Rollover.ReadTTL); err != nil {
return errors.Wrap(err, "failed to parse esRollover.readTTL to time.Duration")
}
}
return nil
}
func (r *ReconcileJaeger) runStrategyChooser(instance *v1.Jaeger, secrets []corev1.Secret) strategy.S {
if nil == r.strategyChooser {
return defaultStrategyChooser(instance, secrets)
}
return r.strategyChooser(instance)
}
func defaultStrategyChooser(instance *v1.Jaeger, secrets []corev1.Secret) strategy.S {
return strategy.For(context.Background(), instance, secrets)
}
func (r *ReconcileJaeger) apply(jaeger v1.Jaeger, str strategy.S) error {
// secrets have to be created before ES - they are mounted to the ES pod
if err := r.applySecrets(jaeger, str.Secrets()); err != nil {
return err
}
elasticsearches := str.Elasticsearches()
if strings.EqualFold(viper.GetString("es-provision"), v1.FlagProvisionElasticsearchTrue) {
if err := r.applyElasticsearches(jaeger, elasticsearches); err != nil {
return err
}
} else if len(elasticsearches) > 0 {
log.WithFields(log.Fields{
"namespace": jaeger.Namespace,
"instance": jaeger.Name,
}).Warn("An Elasticsearch cluster should be provisioned, but provisioning is disabled for this Jaeger Operator")
}
// storage dependencies have to be deployed after ES is ready
if err := r.handleDependencies(str); err != nil {
return errors.Wrap(err, "failed to handler dependencies")
}
if err := r.applyRoles(jaeger, str.Roles()); err != nil {
return err
}
if err := r.applyAccounts(jaeger, str.Accounts()); err != nil {
return err
}
if err := r.applyRoleBindings(jaeger, str.RoleBindings()); err != nil {
return err
}
if err := r.applyConfigMaps(jaeger, str.ConfigMaps()); err != nil {
return err
}
if err := r.applyCronJobs(jaeger, str.CronJobs()); err != nil {
return err
}
if err := r.applyDaemonSets(jaeger, str.DaemonSets()); err != nil {
return err
}
// seems counter intuitive to have services created *before* deployments,
// but some resources used by deployments are created by services, such as TLS certs
// for the oauth proxy, if one is used
if err := r.applyServices(jaeger, str.Services()); err != nil {
return err
}
if err := r.applyDeployments(jaeger, str.Deployments()); err != nil {
return err
}
if strings.EqualFold(viper.GetString("platform"), v1.FlagPlatformOpenShift) {
if err := r.applyRoutes(jaeger, str.Routes()); err != nil {
return err
}
} else {
if err := r.applyIngresses(jaeger, str.Ingresses()); err != nil {
return err
}
}
return nil
}