/
controller.go
202 lines (158 loc) · 7.34 KB
/
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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
Copyright 2020 The cert-manager 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 certificaterequests
import (
"context"
"fmt"
"github.com/go-logr/logr"
k8sErrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"k8s.io/utils/clock"
v1 "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1"
cmclient "github.com/jetstack/cert-manager/pkg/client/clientset/versioned"
cmlisters "github.com/jetstack/cert-manager/pkg/client/listers/certmanager/v1"
controllerpkg "github.com/jetstack/cert-manager/pkg/controller"
"github.com/jetstack/cert-manager/pkg/controller/certificaterequests/util"
"github.com/jetstack/cert-manager/pkg/issuer"
logf "github.com/jetstack/cert-manager/pkg/logs"
)
const (
ControllerName = "certificaterequests"
)
var keyFunc = controllerpkg.KeyFunc
type Issuer interface {
Sign(context.Context, *v1.CertificateRequest, v1.GenericIssuer) (*issuer.IssueResponse, error)
}
type Controller struct {
helper issuer.Helper
// clientset used to update cert-manager API resources
cmClient cmclient.Interface
certificateRequestLister cmlisters.CertificateRequestLister
queue workqueue.RateLimitingInterface
// logger to be used by this controller
log logr.Logger
// used to record Events about resources to the API
recorder record.EventRecorder
// the issuer kind to react to when a certificate request is synced
issuerType string
issuerLister cmlisters.IssuerLister
clusterIssuerLister cmlisters.ClusterIssuerLister
// Extra informers that should be watched by this certificate request
// controller instance. These resources can be owned by certificate requests
// that we resolve.
extraInformers []cache.SharedIndexInformer
// Issuer to call sign function
issuer Issuer
// used for testing
clock clock.Clock
reporter *util.Reporter
}
// New will construct a new certificaterequest controller using the given
// Issuer implementation.
// Note: the extraInformers passed here will be 'waited' for when starting to
// ensure their corresponding listers have synced.
// An event handler will then be set on these informers that automatically
// resyncs CertificateRequest resources that 'own' the objects in the informer.
// It's the callers responsibility to ensure the Run function on the informer
// is called in order to start the reflector. This is handled automatically
// when the informer factory's Start method is called, if the given informer
// was obtained using a SharedInformerFactory.
func New(issuerType string, issuer Issuer, extraInformers ...cache.SharedIndexInformer) *Controller {
return &Controller{
issuerType: issuerType,
issuer: issuer,
extraInformers: extraInformers,
}
}
// Register registers and constructs the controller using the provided context.
// It returns the workqueue to be used to enqueue items, a list of
// InformerSynced functions that must be synced, or an error.
func (c *Controller) Register(ctx *controllerpkg.Context) (workqueue.RateLimitingInterface, []cache.InformerSynced, error) {
// construct a new named logger to be reused throughout the controller
c.log = logf.FromContext(ctx.RootContext, ControllerName)
// create a queue used to queue up items to be processed
c.queue = workqueue.NewNamedRateLimitingQueue(controllerpkg.DefaultItemBasedRateLimiter(), ControllerName)
issuerInformer := ctx.SharedInformerFactory.Certmanager().V1().Issuers()
c.issuerLister = issuerInformer.Lister()
// obtain references to all the informers used by this controller
certificateRequestInformer := ctx.SharedInformerFactory.Certmanager().V1().CertificateRequests()
// build a list of InformerSynced functions that will be returned by the Register method.
// the controller will only begin processing items once all of these informers have synced.
// Ensure we also catch all extra informers for this certificate controller instance
var extraInformersMustSync []cache.InformerSynced
for _, i := range c.extraInformers {
extraInformersMustSync = append(extraInformersMustSync, i.HasSynced)
}
mustSync := append([]cache.InformerSynced{
certificateRequestInformer.Informer().HasSynced,
issuerInformer.Informer().HasSynced,
}, extraInformersMustSync...)
// if scoped to a single namespace
// if we are running in non-namespaced mode (i.e. --namespace=""), we also
// register event handlers and obtain a lister for clusterissuers.
if ctx.Namespace == "" {
clusterIssuerInformer := ctx.SharedInformerFactory.Certmanager().V1().ClusterIssuers()
c.clusterIssuerLister = clusterIssuerInformer.Lister()
// register handler function for clusterissuer resources
clusterIssuerInformer.Informer().AddEventHandler(&controllerpkg.BlockingEventHandler{WorkFunc: c.handleGenericIssuer})
mustSync = append(mustSync, clusterIssuerInformer.Informer().HasSynced)
}
// set all the references to the listers for used by the Sync function
c.certificateRequestLister = certificateRequestInformer.Lister()
// register handler functions
certificateRequestInformer.Informer().AddEventHandler(&controllerpkg.QueuingEventHandler{Queue: c.queue})
issuerInformer.Informer().AddEventHandler(&controllerpkg.BlockingEventHandler{WorkFunc: c.handleGenericIssuer})
// Ensure we catch extra informers that are owned by certificate requests
for _, i := range c.extraInformers {
i.AddEventHandler(&controllerpkg.BlockingEventHandler{
WorkFunc: controllerpkg.HandleOwnedResourceNamespacedFunc(c.log, c.queue, certificateRequestGvk, certificateRequestGetter(c.certificateRequestLister)),
})
}
// create an issuer helper for reading generic issuers
c.helper = issuer.NewHelper(c.issuerLister, c.clusterIssuerLister)
// clock is used to set the FailureTime of failed CertificateRequests
c.clock = ctx.Clock
// recorder records events about resources to the Kubernetes api
c.recorder = ctx.Recorder
c.reporter = util.NewReporter(c.clock, c.recorder)
c.cmClient = ctx.CMClient
c.log.V(logf.DebugLevel).Info("new certificate request controller registered",
"type", c.issuerType)
return c.queue, mustSync, nil
}
func (c *Controller) ProcessItem(ctx context.Context, key string) error {
log := logf.FromContext(ctx)
dbg := log.V(logf.DebugLevel)
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
log.Error(err, "invalid resource key")
return nil
}
cr, err := c.certificateRequestLister.CertificateRequests(namespace).Get(name)
if err != nil {
if k8sErrors.IsNotFound(err) {
dbg.Info(fmt.Sprintf("certificate request in work queue no longer exists: %s", err))
return nil
}
return err
}
ctx = logf.NewContext(ctx, logf.WithResource(log, cr))
return c.Sync(ctx, cr)
}
func certificateRequestGetter(lister cmlisters.CertificateRequestLister) func(namespace, name string) (interface{}, error) {
return func(namespace, name string) (interface{}, error) {
return lister.CertificateRequests(namespace).Get(name)
}
}