/
trigger.go
121 lines (101 loc) · 4.21 KB
/
trigger.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
/*
Copyright 2020 The Knative Authors
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 trigger
import (
"context"
"go.uber.org/zap"
"k8s.io/apimachinery/pkg/api/equality"
apierrs "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"knative.dev/eventing/pkg/apis/eventing"
v1 "knative.dev/eventing/pkg/apis/eventing/v1"
triggerreconciler "knative.dev/eventing/pkg/client/injection/reconciler/eventing/v1/trigger"
eventinglisters "knative.dev/eventing/pkg/client/listers/eventing/v1"
"knative.dev/pkg/logging"
pkgreconciler "knative.dev/pkg/reconciler"
kedaclientset "knative.dev/eventing-autoscaler-keda/third_party/pkg/client/clientset/versioned"
kedalisters "knative.dev/eventing-autoscaler-keda/third_party/pkg/client/listers/keda/v1alpha1"
"knative.dev/eventing-autoscaler-keda/pkg/reconciler/keda"
"knative.dev/eventing-autoscaler-keda/pkg/reconciler/trigger/resources"
)
type Reconciler struct {
kedaClientset kedaclientset.Interface
// listers index properties about resources
brokerLister eventinglisters.BrokerLister
scaledObjectLister kedalisters.ScaledObjectLister
brokerClass string
}
// Check that our Reconciler implements Interface
var _ triggerreconciler.Interface = (*Reconciler)(nil)
// ReconcilerArgs are the arguments needed to create a broker.Reconciler.
type ReconcilerArgs struct {
DispatcherImage string
DispatcherServiceAccountName string
}
func (r *Reconciler) ReconcileKind(ctx context.Context, t *v1.Trigger) pkgreconciler.Event {
logging.FromContext(ctx).Debug("Reconciling", zap.Any("Trigger", t))
broker, err := r.brokerLister.Brokers(t.Namespace).Get(t.Spec.Broker)
if err != nil {
if apierrs.IsNotFound(err) {
// Ok to return nil here. Once the Broker comes available, or Trigger changes, we get requeued.
return nil
}
logging.FromContext(ctx).Errorf("Failed to get Broker: \"%s/%s\" : %s", t.Spec.Broker, t.Namespace, err)
return nil
}
// If it's not my brokerclass, ignore
if broker.Annotations[eventing.BrokerClassKey] != r.brokerClass {
logging.FromContext(ctx).Infof("Ignoring trigger %s/%s", t.Namespace, t.Name)
return nil
}
return r.reconcileScaledObject(ctx, broker, t)
}
func (r *Reconciler) reconcileScaledObject(ctx context.Context, broker *v1.Broker, trigger *v1.Trigger) error {
// Check the annotation to see if the Brokers Triggers should even be scaled.
doAutoscale := broker.GetAnnotations()[keda.AutoscalingClassAnnotation] == keda.KEDA
so, err := resources.MakeDispatcherScaledObject(ctx, broker, trigger)
if err != nil {
logging.FromContext(ctx).Errorw("Failed to create scaled object resource", zap.Error(err))
return err
}
current, err := r.scaledObjectLister.ScaledObjects(so.Namespace).Get(so.Name)
if apierrs.IsNotFound(err) {
if !doAutoscale {
// Ok, not there, not wanted, we're good...
return nil
}
logging.FromContext(ctx).Infof("Creating ScaledObject %s/%s", so.Namespace, so.Name)
_, err = r.kedaClientset.KedaV1alpha1().ScaledObjects(so.Namespace).Create(ctx, so, metav1.CreateOptions{})
return err
}
if err != nil {
return err
}
// It's there, should it be?
if !doAutoscale {
logging.FromContext(ctx).Infof("Deleting ScaledObject %s/%s", so.Namespace, so.Name)
err = r.kedaClientset.KedaV1alpha1().ScaledObjects(so.Namespace).Delete(ctx, so.Name, metav1.DeleteOptions{})
if err != nil {
logging.FromContext(ctx).Errorw("Failed to delete ScaledObject", zap.Error(err))
}
return err
}
if !equality.Semantic.DeepDerivative(so.Spec, current.Spec) {
// Don't modify the informers copy.
desired := current.DeepCopy()
desired.Spec = so.Spec
_, err = r.kedaClientset.KedaV1alpha1().ScaledObjects(desired.Namespace).Update(ctx, desired, metav1.UpdateOptions{})
return err
}
return nil
}