/
secret.go
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/
secret.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 ingress
import (
"context"
"fmt"
"sync"
"time"
"go.uber.org/zap"
corev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
configv2beta3 "github.com/apache/apisix-ingress-controller/pkg/kube/apisix/apis/config/v2beta3"
"github.com/apache/apisix-ingress-controller/pkg/log"
"github.com/apache/apisix-ingress-controller/pkg/types"
apisixv1 "github.com/apache/apisix-ingress-controller/pkg/types/apisix/v1"
)
type secretController struct {
controller *Controller
workqueue workqueue.RateLimitingInterface
workers int
}
func (c *Controller) newSecretController() *secretController {
ctl := &secretController{
controller: c,
workqueue: workqueue.NewNamedRateLimitingQueue(workqueue.NewItemFastSlowRateLimiter(1*time.Second, 60*time.Second, 5), "Secrets"),
workers: 1,
}
ctl.controller.secretInformer.AddEventHandler(
cache.ResourceEventHandlerFuncs{
AddFunc: ctl.onAdd,
UpdateFunc: ctl.onUpdate,
DeleteFunc: ctl.onDelete,
},
)
return ctl
}
func (c *secretController) run(ctx context.Context) {
log.Info("secret controller started")
defer log.Info("secret controller exited")
defer c.workqueue.ShutDown()
if ok := cache.WaitForCacheSync(ctx.Done(), c.controller.secretInformer.HasSynced); !ok {
log.Error("informers sync failed")
return
}
for i := 0; i < c.workers; i++ {
go c.runWorker(ctx)
}
<-ctx.Done()
}
func (c *secretController) runWorker(ctx context.Context) {
for {
obj, quit := c.workqueue.Get()
if quit {
return
}
err := c.sync(ctx, obj.(*types.Event))
c.workqueue.Done(obj)
c.handleSyncErr(obj, err)
}
}
func (c *secretController) sync(ctx context.Context, ev *types.Event) error {
key := ev.Object.(string)
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
log.Errorf("invalid resource key: %s", key)
return err
}
sec, err := c.controller.secretLister.Secrets(namespace).Get(name)
if err != nil {
if !k8serrors.IsNotFound(err) {
log.Errorw("failed to get Secret",
zap.String("key", key),
zap.Error(err),
)
return err
}
if ev.Type != types.EventDelete {
log.Warnw("Secret was deleted before it can be delivered",
zap.String("key", key),
)
return nil
}
}
if ev.Type == types.EventDelete {
if sec != nil {
// We still find the resource while we are processing the DELETE event,
// that means object with same namespace and name was created, discarding
// this stale DELETE event.
log.Warnw("discard the stale secret delete event since the resource still exists",
zap.String("key", key),
)
return nil
}
sec = ev.Tombstone.(*corev1.Secret)
}
secretMapKey := namespace + "_" + name
// sync SSL in APISIX which is store in secretSSLMap
ssls, ok := c.controller.secretSSLMap.Load(secretMapKey)
if !ok {
// This secret is not concerned.
return nil
}
sslMap := ssls.(*sync.Map)
sslMap.Range(func(k, v interface{}) bool {
ssl := v.(*apisixv1.Ssl)
tlsMetaKey := k.(string)
tlsNamespace, tlsName, err := cache.SplitMetaNamespaceKey(tlsMetaKey)
if err != nil {
log.Errorf("invalid cached ApisixTls key: %s", tlsMetaKey)
return true
}
tls, err := c.controller.apisixTlsLister.ApisixTlses(tlsNamespace).Get(tlsName)
if err != nil {
log.Warnw("secret related ApisixTls resource not found, skip",
zap.String("ApisixTls", tlsMetaKey),
)
return true
}
// We don't expect a secret to be used as both SSL and mTLS in ApisixTls
if tls.Spec.Secret.Namespace == sec.Namespace && tls.Spec.Secret.Name == sec.Name {
cert, pkey, err := c.controller.translator.ExtractKeyPair(sec, true)
if err != nil {
log.Errorw("secret required by ApisixTls invalid",
zap.String("ApisixTls", tlsMetaKey),
zap.Error(err),
)
go func(tls *configv2beta3.ApisixTls) {
c.controller.recorderEventS(tls, corev1.EventTypeWarning, _resourceSyncAborted,
fmt.Sprintf("sync from secret %s changes failed, error: %s", key, err.Error()))
c.controller.recordStatus(tls, _resourceSyncAborted, err, metav1.ConditionFalse, tls.GetGeneration())
}(tls)
return true
}
// sync ssl
ssl.Cert = string(cert)
ssl.Key = string(pkey)
} else if tls.Spec.Client != nil &&
tls.Spec.Client.CASecret.Namespace == sec.Namespace && tls.Spec.Client.CASecret.Name == sec.Name {
ca, _, err := c.controller.translator.ExtractKeyPair(sec, false)
if err != nil {
log.Errorw("ca secret required by ApisixTls invalid",
zap.String("ApisixTls", tlsMetaKey),
zap.Error(err),
)
go func(tls *configv2beta3.ApisixTls) {
c.controller.recorderEventS(tls, corev1.EventTypeWarning, _resourceSyncAborted,
fmt.Sprintf("sync from ca secret %s changes failed, error: %s", key, err.Error()))
c.controller.recordStatus(tls, _resourceSyncAborted, err, metav1.ConditionFalse, tls.GetGeneration())
}(tls)
return true
}
ssl.Client = &apisixv1.MutualTLSClientConfig{
CA: string(ca),
}
} else {
log.Warnw("stale secret cache, ApisixTls doesn't requires target secret",
zap.String("ApisixTls", tlsMetaKey),
zap.String("secret", key),
)
return true
}
// Use another goroutine to send requests, to avoid
// long time lock occupying.
go func(ssl *apisixv1.Ssl, tls *configv2beta3.ApisixTls) {
err := c.controller.syncSSL(ctx, ssl, ev.Type)
if err != nil {
log.Errorw("failed to sync ssl to APISIX",
zap.Error(err),
zap.Any("ssl", ssl),
zap.Any("secret", sec),
)
c.controller.recorderEventS(tls, corev1.EventTypeWarning, _resourceSyncAborted,
fmt.Sprintf("sync from secret %s changes failed, error: %s", key, err.Error()))
c.controller.recordStatus(tls, _resourceSyncAborted, err, metav1.ConditionFalse, tls.GetGeneration())
} else {
c.controller.recorderEventS(tls, corev1.EventTypeNormal, _resourceSynced,
fmt.Sprintf("sync from secret %s changes", key))
c.controller.recordStatus(tls, _resourceSynced, nil, metav1.ConditionTrue, tls.GetGeneration())
}
}(ssl, tls)
return true
})
return err
}
func (c *secretController) handleSyncErr(obj interface{}, err error) {
if err == nil {
c.workqueue.Forget(obj)
c.controller.MetricsCollector.IncrSyncOperation("secret", "success")
return
}
log.Warnw("sync ApisixTls failed, will retry",
zap.Any("object", obj),
zap.Error(err),
)
c.workqueue.AddRateLimited(obj)
c.controller.MetricsCollector.IncrSyncOperation("secret", "failure")
}
func (c *secretController) onAdd(obj interface{}) {
key, err := cache.MetaNamespaceKeyFunc(obj)
if err != nil {
log.Errorf("found secret object with bad namespace/name: %s, ignore it", err)
return
}
if !c.controller.namespaceWatching(key) {
return
}
log.Debugw("secret add event arrived",
zap.String("object-key", key),
)
c.workqueue.Add(&types.Event{
Type: types.EventAdd,
Object: key,
})
c.controller.MetricsCollector.IncrEvents("secret", "add")
}
func (c *secretController) onUpdate(prev, curr interface{}) {
prevSec := prev.(*corev1.Secret)
currSec := curr.(*corev1.Secret)
if prevSec.GetResourceVersion() >= currSec.GetResourceVersion() {
return
}
key, err := cache.MetaNamespaceKeyFunc(currSec)
if err != nil {
log.Errorf("found secrets object with bad namespace/name: %s, ignore it", err)
return
}
if !c.controller.namespaceWatching(key) {
return
}
log.Debugw("secret update event arrived",
zap.Any("new object", curr),
zap.Any("old object", prev),
)
c.workqueue.Add(&types.Event{
Type: types.EventUpdate,
Object: key,
})
c.controller.MetricsCollector.IncrEvents("secret", "update")
}
func (c *secretController) onDelete(obj interface{}) {
sec, ok := obj.(*corev1.Secret)
if !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
log.Errorf("found secrets: %+v in bad tombstone state", obj)
return
}
sec = tombstone.Obj.(*corev1.Secret)
}
key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj)
if err != nil {
log.Errorf("found secret resource with bad meta namespace key: %s", err)
return
}
// FIXME Refactor Controller.namespaceWatching to just use
// namespace after all controllers use the same way to fetch
// the object.
if !c.controller.namespaceWatching(key) {
return
}
log.Debugw("secret delete event arrived",
zap.Any("final state", sec),
)
c.workqueue.Add(&types.Event{
Type: types.EventDelete,
Object: key,
Tombstone: sec,
})
c.controller.MetricsCollector.IncrEvents("secret", "delete")
}