/
shortlink_controller.go
109 lines (88 loc) · 3.7 KB
/
shortlink_controller.go
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/*
Copyright 2022.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package controllers
import (
"context"
"time"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
"go.uber.org/zap"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
ctrl "sigs.k8s.io/controller-runtime"
v1alpha1 "github.com/cedi/urlshortener/api/v1alpha1"
shortlinkclient "github.com/cedi/urlshortener/pkg/client"
"github.com/cedi/urlshortener/pkg/observability"
"github.com/uptrace/opentelemetry-go-extra/otelzap"
)
// ShortLinkReconciler reconciles a ShortLink object
type ShortLinkReconciler struct {
client *shortlinkclient.ShortlinkClient
scheme *runtime.Scheme
tracer trace.Tracer
}
// NewShortLinkReconciler returns a new ShortLinkReconciler
func NewShortLinkReconciler(client *shortlinkclient.ShortlinkClient, scheme *runtime.Scheme, tracer trace.Tracer) *ShortLinkReconciler {
return &ShortLinkReconciler{
client: client,
scheme: scheme,
tracer: tracer,
}
}
//+kubebuilder:rbac:groups=urlshortener.cedi.dev,resources=shortlinks,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=urlshortener.cedi.dev,resources=shortlinks/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=urlshortener.cedi.dev,resources=shortlinks/finalizers,verbs=update
// Reconcile is part of the main kubernetes reconciliation loop which aims to
// move the current state of the cluster closer to the desired state.
//
// For more details, check Reconcile and its Result here:
// - https://pkg.go.dev/sigs.k8s.io/controller-runtime@v0.12.1/pkg/reconcile
func (r *ShortLinkReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
startTime := time.Now()
defer func() {
reconcilerDuration.WithLabelValues("shortlink", req.Name, req.Namespace).Observe(float64(time.Since(startTime).Microseconds()))
}()
span := trace.SpanFromContext(ctx)
// Check if the span was sampled and is recording the data
if !span.IsRecording() {
ctx, span = r.tracer.Start(ctx, "ShortLinkReconciler.Reconcile")
defer span.End()
}
span.SetAttributes(attribute.String("shortlink", req.Name))
log := otelzap.L().Sugar().With(zap.String("name", "reconciler"), zap.String("shortlink", req.NamespacedName.String()))
// Get ShortLink from etcd
shortlink, err := r.client.GetNamespaced(ctx, req.NamespacedName)
if err != nil || shortlink == nil {
if errors.IsNotFound(err) {
observability.RecordInfo(ctx, span, log, "Shortlink resource not found. Ignoring since object must be deleted")
} else {
observability.RecordError(ctx, span, log, err, "Failed to fetch ShortLink resource")
}
}
if shortlinkList, err := r.client.ListNamespaced(ctx, req.Namespace); shortlinkList != nil && err == nil {
active.WithLabelValues("shortlink").Set(float64(len(shortlinkList.Items)))
for _, shortlink := range shortlinkList.Items {
shortlinkInvocations.WithLabelValues(
shortlink.ObjectMeta.Name,
shortlink.ObjectMeta.Namespace,
).Set(float64(shortlink.Status.Count))
}
}
return ctrl.Result{}, nil
}
// SetupWithManager sets up the controller with the Manager.
func (r *ShortLinkReconciler) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&v1alpha1.ShortLink{}).
Complete(r)
}