-
Notifications
You must be signed in to change notification settings - Fork 7
/
policy_controller.go
160 lines (138 loc) · 6.67 KB
/
policy_controller.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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
/*
Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
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"
policyinfo "github.com/aws/amazon-network-policy-controller-k8s/api/v1alpha1"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
networking "k8s.io/api/networking/v1"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/healthz"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
"github.com/aws/amazon-network-policy-controller-k8s/internal/eventhandlers"
"github.com/aws/amazon-network-policy-controller-k8s/pkg/config"
"github.com/aws/amazon-network-policy-controller-k8s/pkg/k8s"
"github.com/aws/amazon-network-policy-controller-k8s/pkg/policyendpoints"
"github.com/aws/amazon-network-policy-controller-k8s/pkg/resolvers"
)
const (
controllerName = "policy"
policyFinalizerName = "networking.k8s.aws/resources"
)
func NewPolicyReconciler(k8sClient client.Client, policyEndpointsManager policyendpoints.PolicyEndpointsManager,
controllerConfig config.ControllerConfig, finalizerManager k8s.FinalizerManager, logger logr.Logger) *policyReconciler {
policyTracker := resolvers.NewPolicyTracker(logger.WithName("policy-tracker"))
policyResolver := resolvers.NewPolicyReferenceResolver(k8sClient, policyTracker, logger.WithName("policy-resolver"))
return &policyReconciler{
k8sClient: k8sClient,
policyResolver: policyResolver,
policyTracker: policyTracker,
policyEndpointsManager: policyEndpointsManager,
podUpdateBatchPeriodDuration: controllerConfig.PodUpdateBatchPeriodDuration,
finalizerManager: finalizerManager,
maxConcurrentReconciles: controllerConfig.MaxConcurrentReconciles,
logger: logger,
}
}
var _ reconcile.Reconciler = (*policyReconciler)(nil)
type policyReconciler struct {
k8sClient client.Client
policyResolver resolvers.PolicyReferenceResolver
policyTracker resolvers.PolicyTracker
policyEndpointsManager policyendpoints.PolicyEndpointsManager
podUpdateBatchPeriodDuration time.Duration
finalizerManager k8s.FinalizerManager
maxConcurrentReconciles int
logger logr.Logger
}
//+kubebuilder:rbac:groups=networking.k8s.aws,resources=policyendpoints,verbs=get;list;watch;create;update;patch;delete
//+kubebuilder:rbac:groups=networking.k8s.aws,resources=policyendpoints/status,verbs=get;update;patch
//+kubebuilder:rbac:groups=networking.k8s.aws,resources=policyendpoints/finalizers,verbs=update
//+kubebuilder:rbac:groups="",resources=pods,verbs=get;list;watch
//+kubebuilder:rbac:groups="",resources=namespaces,verbs=get;list;watch
//+kubebuilder:rbac:groups="",resources=services,verbs=get;list;watch
//+kubebuilder:rbac:groups="networking.k8s.io",resources=networkpolicies,verbs=get;list;watch;update;patch
func (r *policyReconciler) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
r.logger.Info("Got reconcile request", "resource", request)
return ctrl.Result{}, r.reconcile(ctx, request)
}
func (r *policyReconciler) SetupWithManager(ctx context.Context, mgr ctrl.Manager) error {
if err := r.setupIndexes(ctx, mgr.GetFieldIndexer()); err != nil {
return err
}
policyEventChan := make(chan event.GenericEvent)
policyEventHandler := eventhandlers.NewEnqueueRequestForPolicyEvent(r.policyTracker, r.podUpdateBatchPeriodDuration,
r.logger.WithName("eventHandler").WithName("policy"))
podEventHandler := eventhandlers.NewEnqueueRequestForPodEvent(policyEventChan, r.k8sClient, r.policyResolver,
r.logger.WithName("eventHandler").WithName("pod"))
nsEventHandler := eventhandlers.NewEnqueueRequestForNamespaceEvent(policyEventChan, r.k8sClient, r.policyResolver,
r.logger.WithName("eventHandler").WithName("namespace"))
svcEventHandler := eventhandlers.NewEnqueueRequestForServiceEvent(policyEventChan, r.k8sClient, r.policyResolver,
r.logger.WithName("eventHandler").WithName("service"))
if err := mgr.AddHealthzCheck("policy-controller", healthz.Ping); err != nil {
r.logger.Error(err, "Failed to setup the policy controller healthz check")
return err
}
return ctrl.NewControllerManagedBy(mgr).
Named(controllerName).
Watches(&networking.NetworkPolicy{}, policyEventHandler).
Watches(&corev1.Pod{}, podEventHandler).
Watches(&corev1.Namespace{}, nsEventHandler).
Watches(&corev1.Service{}, svcEventHandler).
WatchesRawSource(&source.Channel{Source: policyEventChan}, policyEventHandler).
WithOptions(controller.Options{
MaxConcurrentReconciles: r.maxConcurrentReconciles,
}).Complete(r)
}
func (r *policyReconciler) reconcile(ctx context.Context, request reconcile.Request) error {
policy := &networking.NetworkPolicy{}
if err := r.k8sClient.Get(ctx, request.NamespacedName, policy); err != nil {
r.logger.Info("Unable to get policy", "resource", policy, "err", err)
return client.IgnoreNotFound(err)
}
if !policy.DeletionTimestamp.IsZero() {
return r.cleanupPolicy(ctx, policy)
}
return r.reconcilePolicy(ctx, policy)
}
func (r *policyReconciler) reconcilePolicy(ctx context.Context, policy *networking.NetworkPolicy) error {
if err := r.finalizerManager.AddFinalizers(ctx, policy, policyFinalizerName); err != nil {
return err
}
return r.policyEndpointsManager.Reconcile(ctx, policy)
}
func (r *policyReconciler) cleanupPolicy(ctx context.Context, policy *networking.NetworkPolicy) error {
if k8s.HasFinalizer(policy, policyFinalizerName) {
r.policyTracker.RemovePolicy(policy)
if err := r.policyEndpointsManager.Cleanup(ctx, policy); err != nil {
return err
}
if err := r.finalizerManager.RemoveFinalizers(ctx, policy, policyFinalizerName); err != nil {
return err
}
}
return nil
}
func (r *policyReconciler) setupIndexes(ctx context.Context, fieldIndexer client.FieldIndexer) error {
if err := fieldIndexer.IndexField(ctx, &policyinfo.PolicyEndpoint{}, policyendpoints.IndexKeyPolicyReferenceName,
policyendpoints.IndexFunctionPolicyReferenceName); err != nil {
return err
}
return nil
}