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lokistack_controller.go
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lokistack_controller.go
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package controllers
import (
"context"
"errors"
"time"
"github.com/go-logr/logr"
"github.com/google/go-cmp/cmp"
openshiftconfigv1 "github.com/openshift/api/config/v1"
routev1 "github.com/openshift/api/route/v1"
monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
configv1 "github.com/grafana/loki/operator/apis/config/v1"
lokiv1 "github.com/grafana/loki/operator/apis/loki/v1"
"github.com/grafana/loki/operator/controllers/loki/internal/management/state"
"github.com/grafana/loki/operator/internal/external/k8s"
"github.com/grafana/loki/operator/internal/handlers"
"github.com/grafana/loki/operator/internal/manifests/openshift"
"github.com/grafana/loki/operator/internal/status"
)
var (
createOrUpdateOnlyPred = builder.WithPredicates(predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
// Update only if generation or annotations change, filter out anything else.
// We only need to check generation or annotations change here, because it is only
// updated on spec changes. On the other hand RevisionVersion
// changes also on status changes. We want to omit reconciliation
// for status updates for now.
return (e.ObjectOld.GetGeneration() != e.ObjectNew.GetGeneration()) ||
cmp.Diff(e.ObjectOld.GetAnnotations(), e.ObjectNew.GetAnnotations()) != ""
},
CreateFunc: func(e event.CreateEvent) bool { return true },
DeleteFunc: func(e event.DeleteEvent) bool { return false },
GenericFunc: func(e event.GenericEvent) bool { return false },
})
updateOrDeleteOnlyPred = builder.WithPredicates(predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
switch e.ObjectOld.(type) {
case *openshiftconfigv1.Proxy:
// Update on any change of the RevisionVersion to capture
// status updates for the proxy object. On OpenShift the
// proxy status indicates that values for httpProxy/httpsProxy/noProxy
// are valid after considering the readiness probes to access
// the public net through these proxies.
return true
default:
// Update only if generation change, filter out anything else.
// We only need to check generation change here, because it is only
// updated on spec changes. On the other hand RevisionVersion
// changes also on status changes. We want to omit reconciliation
// for status updates for now.
return e.ObjectOld.GetGeneration() != e.ObjectNew.GetGeneration()
}
},
CreateFunc: func(e event.CreateEvent) bool { return false },
DeleteFunc: func(e event.DeleteEvent) bool {
// DeleteStateUnknown evaluates to false only if the object
// has been confirmed as deleted by the api server.
return !e.DeleteStateUnknown
},
GenericFunc: func(e event.GenericEvent) bool { return false },
})
updateOrDeleteWithStatusPred = builder.WithPredicates(predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
return e.ObjectOld.GetGeneration() != e.ObjectNew.GetGeneration() || statusDifferent(e)
},
CreateFunc: func(_ event.CreateEvent) bool {
return false
},
DeleteFunc: func(e event.DeleteEvent) bool {
// DeleteStateUnknown evaluates to false only if the object
// has been confirmed as deleted by the api server.
return !e.DeleteStateUnknown
},
GenericFunc: func(_ event.GenericEvent) bool {
return false
},
})
createUpdateOrDeletePred = builder.WithPredicates(predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
return e.ObjectOld.GetResourceVersion() != e.ObjectNew.GetResourceVersion()
},
CreateFunc: func(e event.CreateEvent) bool { return true },
DeleteFunc: func(e event.DeleteEvent) bool { return true },
GenericFunc: func(e event.GenericEvent) bool { return false },
})
)
// LokiStackReconciler reconciles a LokiStack object
type LokiStackReconciler struct {
client.Client
Log logr.Logger
Scheme *runtime.Scheme
FeatureGates configv1.FeatureGates
}
// +kubebuilder:rbac:groups=loki.grafana.com,resources=lokistacks,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=loki.grafana.com,resources=lokistacks/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=loki.grafana.com,resources=lokistacks/finalizers,verbs=update
// +kubebuilder:rbac:groups="",resources=pods;nodes;services;endpoints;configmaps;secrets;serviceaccounts,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=apps,resources=deployments;statefulsets,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=rbac.authorization.k8s.io,resources=clusterrolebindings;clusterroles;roles;rolebindings,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=monitoring.coreos.com,resources=servicemonitors;prometheusrules,verbs=get;list;watch;create;update;delete
// +kubebuilder:rbac:groups=monitoring.coreos.com,resources=alertmanagers,verbs=patch
// +kubebuilder:rbac:groups=monitoring.coreos.com,resources=alertmanagers/api,verbs=create
// +kubebuilder:rbac:urls=/api/v2/alerts,verbs=create
// +kubebuilder:rbac:groups=coordination.k8s.io,resources=leases,verbs=get;create;update
// +kubebuilder:rbac:groups=networking.k8s.io,resources=ingresses,verbs=get;list;watch;create;update
// +kubebuilder:rbac:groups=policy,resources=poddisruptionbudgets,verbs=get;list;watch;create;update
// +kubebuilder:rbac:groups=config.openshift.io,resources=dnses;apiservers;proxies,verbs=get;list;watch
// +kubebuilder:rbac:groups=route.openshift.io,resources=routes,verbs=get;list;watch;create;update;delete
// Reconcile is part of the main kubernetes reconciliation loop which aims to
// move the current state of the cluster closer to the desired state.
// Compare the state specified by the LokiStack object against the actual cluster state,
// and then perform operations to make the cluster state reflect the state specified by
// the user.
//
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.7.0/pkg/reconcile
func (r *LokiStackReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
ok, err := state.IsManaged(ctx, req, r.Client)
if err != nil {
return ctrl.Result{}, err
}
if !ok {
r.Log.Info("Skipping reconciliation for unmanaged lokistack resource", "name", req.NamespacedName)
// Stop requeueing for unmanaged LokiStack custom resources
return ctrl.Result{}, nil
}
var degraded *status.DegradedError
err = r.updateResources(ctx, req)
switch {
case errors.As(err, °raded):
// degraded errors are handled by status.Refresh below
case err != nil:
return ctrl.Result{}, err
}
err = status.Refresh(ctx, r.Client, req, time.Now(), degraded)
if err != nil {
return ctrl.Result{}, err
}
if degraded != nil {
return ctrl.Result{
Requeue: degraded.Requeue,
}, nil
}
return ctrl.Result{}, nil
}
func (r *LokiStackReconciler) updateResources(ctx context.Context, req ctrl.Request) error {
if r.FeatureGates.BuiltInCertManagement.Enabled {
if err := handlers.CreateOrRotateCertificates(ctx, r.Log, req, r.Client, r.Scheme, r.FeatureGates); err != nil {
return err
}
}
if err := handlers.CreateOrUpdateLokiStack(ctx, r.Log, req, r.Client, r.Scheme, r.FeatureGates); err != nil {
return err
}
return nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *LokiStackReconciler) SetupWithManager(mgr manager.Manager) error {
b := ctrl.NewControllerManagedBy(mgr)
return r.buildController(k8s.NewCtrlBuilder(b))
}
func (r *LokiStackReconciler) buildController(bld k8s.Builder) error {
bld = bld.
For(&lokiv1.LokiStack{}, createOrUpdateOnlyPred).
Owns(&corev1.ConfigMap{}, updateOrDeleteOnlyPred).
Owns(&corev1.Secret{}, updateOrDeleteOnlyPred).
Owns(&corev1.ServiceAccount{}, updateOrDeleteOnlyPred).
Owns(&corev1.Service{}, updateOrDeleteOnlyPred).
Owns(&appsv1.Deployment{}, updateOrDeleteWithStatusPred).
Owns(&appsv1.StatefulSet{}, updateOrDeleteWithStatusPred).
Owns(&rbacv1.ClusterRole{}, updateOrDeleteOnlyPred).
Owns(&rbacv1.ClusterRoleBinding{}, updateOrDeleteOnlyPred).
Owns(&rbacv1.Role{}, updateOrDeleteOnlyPred).
Owns(&rbacv1.RoleBinding{}, updateOrDeleteOnlyPred).
Watches(&corev1.Service{}, r.enqueueForAlertManagerServices(), createUpdateOrDeletePred).
Watches(&corev1.Secret{}, r.enqueueForStorageSecret(), createUpdateOrDeletePred).
Watches(&corev1.ConfigMap{}, r.enqueueForStorageCA(), createUpdateOrDeletePred)
if r.FeatureGates.LokiStackAlerts {
bld = bld.Owns(&monitoringv1.PrometheusRule{}, updateOrDeleteOnlyPred)
}
if r.FeatureGates.OpenShift.Enabled {
bld = bld.Owns(&routev1.Route{}, updateOrDeleteOnlyPred)
} else {
bld = bld.Owns(&networkingv1.Ingress{}, updateOrDeleteOnlyPred)
}
if r.FeatureGates.OpenShift.ClusterTLSPolicy {
bld = bld.Watches(&openshiftconfigv1.APIServer{}, r.enqueueAllLokiStacksHandler(), updateOrDeleteOnlyPred)
}
if r.FeatureGates.OpenShift.ClusterProxy {
bld = bld.Watches(&openshiftconfigv1.Proxy{}, r.enqueueAllLokiStacksHandler(), updateOrDeleteOnlyPred)
}
return bld.Complete(r)
}
func (r *LokiStackReconciler) enqueueAllLokiStacksHandler() handler.EventHandler {
return handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, obj client.Object) []reconcile.Request {
lokiStacks := &lokiv1.LokiStackList{}
if err := r.Client.List(ctx, lokiStacks); err != nil {
r.Log.Error(err, "Error getting LokiStack resources in event handler")
return nil
}
var requests []reconcile.Request
for _, stack := range lokiStacks.Items {
requests = append(requests, reconcile.Request{
NamespacedName: types.NamespacedName{
Namespace: stack.Namespace,
Name: stack.Name,
},
})
}
r.Log.Info("Enqueued requests for all LokiStacks because of global resource change", "count", len(requests), "kind", obj.GetObjectKind())
return requests
})
}
func statusDifferent(e event.UpdateEvent) bool {
switch old := e.ObjectOld.(type) {
case *appsv1.Deployment:
newObject := e.ObjectNew.(*appsv1.Deployment)
return cmp.Diff(old.Status, newObject.Status) != ""
case *appsv1.StatefulSet:
newObject := e.ObjectNew.(*appsv1.StatefulSet)
return cmp.Diff(old.Status, newObject.Status) != ""
default:
return false
}
}
func (r *LokiStackReconciler) enqueueForAlertManagerServices() handler.EventHandler {
return handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, obj client.Object) []reconcile.Request {
lokiStacks := &lokiv1.LokiStackList{}
if err := r.Client.List(ctx, lokiStacks); err != nil {
r.Log.Error(err, "Error getting LokiStack resources in event handler")
return nil
}
var requests []reconcile.Request
if obj.GetName() == openshift.MonitoringSVCOperated &&
(obj.GetNamespace() == openshift.MonitoringUserWorkloadNS ||
obj.GetNamespace() == openshift.MonitoringNS) {
for _, stack := range lokiStacks.Items {
if stack.Spec.Tenants != nil && (stack.Spec.Tenants.Mode == lokiv1.OpenshiftLogging ||
stack.Spec.Tenants.Mode == lokiv1.OpenshiftNetwork) {
requests = append(requests, reconcile.Request{
NamespacedName: types.NamespacedName{
Namespace: stack.Namespace,
Name: stack.Name,
},
})
}
}
r.Log.Info("Enqueued requests for all LokiStacks because of UserWorkload Alertmanager Service resource change", "count", len(requests), "kind", obj.GetObjectKind())
}
return requests
})
}
func (r *LokiStackReconciler) enqueueForStorageSecret() handler.EventHandler {
return handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, obj client.Object) []reconcile.Request {
lokiStacks := &lokiv1.LokiStackList{}
if err := r.Client.List(ctx, lokiStacks); err != nil {
r.Log.Error(err, "Error getting LokiStack resources in event handler")
return nil
}
var requests []reconcile.Request
for _, stack := range lokiStacks.Items {
if obj.GetName() == stack.Spec.Storage.Secret.Name && obj.GetNamespace() == stack.Namespace {
requests = append(requests, reconcile.Request{
NamespacedName: types.NamespacedName{
Namespace: stack.Namespace,
Name: stack.Name,
},
})
r.Log.Info("Enqueued requests for LokiStack because of Storage Secret resource change", "LokiStack", stack.Name, "Secret", obj.GetName())
return requests
}
}
return requests
})
}
func (r *LokiStackReconciler) enqueueForStorageCA() handler.EventHandler {
return handler.EnqueueRequestsFromMapFunc(func(ctx context.Context, obj client.Object) []reconcile.Request {
lokiStacks := &lokiv1.LokiStackList{}
if err := r.Client.List(ctx, lokiStacks, client.InNamespace(obj.GetNamespace())); err != nil {
r.Log.Error(err, "Error listing LokiStack resources for storage CA update")
return nil
}
var requests []reconcile.Request
for _, stack := range lokiStacks.Items {
if stack.Spec.Storage.TLS == nil {
continue
}
storageTLS := stack.Spec.Storage.TLS
if obj.GetName() != storageTLS.CA {
continue
}
requests = append(requests, reconcile.Request{
NamespacedName: types.NamespacedName{
Namespace: stack.Namespace,
Name: stack.Name,
},
})
r.Log.Info("Enqueued request for LokiStack because of Storage CA resource change", "LokiStack", stack.Name, "ConfigMap", obj.GetName())
}
return requests
})
}