forked from libopenstorage/stork
/
applicationregistration.go
203 lines (192 loc) · 6.09 KB
/
applicationregistration.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
203
package controllers
import (
"context"
"fmt"
"strings"
"time"
stork_api "github.com/libopenstorage/stork/pkg/apis/stork/v1alpha1"
"github.com/libopenstorage/stork/pkg/appregistration"
"github.com/portworx/sched-ops/k8s/apiextensions"
"github.com/portworx/sched-ops/k8s/stork"
"github.com/portworx/sched-ops/task"
"github.com/sirupsen/logrus"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
apiextensionsclient "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/client-go/rest"
)
// WatchFunc is a callback provided to the Watch functions
type WatchFunc func(object runtime.Object)
func registerCRD(crd apiextensionsv1beta1.CustomResourceDefinition) error {
regCRD := make(map[string][]stork_api.ApplicationResource)
var appList []stork_api.ApplicationResource
// read all CRs from crdv1beta versions
for _, version := range crd.Spec.Versions {
appRes := stork_api.ApplicationResource{
GroupVersionKind: metav1.GroupVersionKind{
Group: crd.Spec.Group,
Version: version.Name,
Kind: crd.Spec.Names.Kind,
},
}
appList = append(appList, appRes)
}
regCRD[strings.ToLower(crd.Spec.Names.Kind)] = appList
return createAppReg(regCRD)
}
func registerCRDV1(crd apiextensionsv1.CustomResourceDefinition) error {
regCRD := make(map[string][]stork_api.ApplicationResource)
var appList []stork_api.ApplicationResource
// read all CRs from crdv1 versions
for _, version := range crd.Spec.Versions {
appRes := stork_api.ApplicationResource{
GroupVersionKind: metav1.GroupVersionKind{
Group: crd.Spec.Group,
Version: version.Name,
Kind: crd.Spec.Names.Kind,
},
}
appList = append(appList, appRes)
}
regCRD[strings.ToLower(crd.Spec.Names.Kind)] = appList
return createAppReg(regCRD)
}
func createAppReg(regCRD map[string][]stork_api.ApplicationResource) error {
// register all CR found in CRD
for name, res := range regCRD {
appReg := &stork_api.ApplicationRegistration{
Resources: res,
}
appReg.Name = name
if _, err := stork.Instance().CreateApplicationRegistration(appReg); err != nil && !errors.IsAlreadyExists(err) {
logrus.Errorf("unable to register app %v, err: %v", appReg, err)
return err
}
}
return nil
}
// RegisterDefaultCRDs registered already supported CRDs
func RegisterDefaultCRDs() error {
// skipCrds grp:version map
skipCrds := map[string]string{
"autopilot.libopenstorage.org": "",
"core.libopenstorage.org": "",
"volumesnapshot.external-storage.k8s.io": "",
"stork.libopenstorage.org": "",
"kdmp.portworx.com": "",
}
for name, res := range appregistration.GetSupportedCRD() {
appReg := &stork_api.ApplicationRegistration{
Resources: res,
}
appReg.Name = name
if _, err := stork.Instance().CreateApplicationRegistration(appReg); err != nil && !errors.IsAlreadyExists(err) {
logrus.Errorf("unable to register app %v, err: %v", appReg, err)
return err
}
}
// create appreg for already registered crd
// list and register crds via v1 apis
crdv1, err := apiextensions.Instance().ListCRDs()
if err == nil {
for _, crd := range crdv1.Items {
// skip stork/volumesnap crd registration
if _, ok := skipCrds[crd.Spec.Group]; ok {
continue
}
if err := registerCRDV1(crd); err != nil {
return err
}
}
} else if errors.IsNotFound(err) {
// list and register crds via v1beta1 apis
crds, err := apiextensions.Instance().ListCRDsV1beta1()
if err != nil {
logrus.Warnf("unable to list v1beta1 crds: %v", err)
return err
}
for _, crd := range crds.Items {
// skip stork/volumesnap crd registration
if _, ok := skipCrds[crd.Spec.Group]; ok {
continue
}
if err := registerCRD(crd); err != nil {
return err
}
}
} else {
return err
}
fn := func(object runtime.Object) {
if crd, ok := object.(*apiextensionsv1.CustomResourceDefinition); ok {
if _, ok := skipCrds[crd.Spec.Group]; ok {
return
}
if err := registerCRDV1(*crd); err != nil {
logrus.WithError(err).Error("unable to create appreg for v1 crd")
}
} else if crd, ok := object.(*apiextensionsv1beta1.CustomResourceDefinition); ok {
if _, ok := skipCrds[crd.Spec.Group]; ok {
return
}
if err := registerCRD(*crd); err != nil {
logrus.WithError(err).Error("unable to create appreg for v1beta1 crd")
}
} else {
err := fmt.Errorf("invalid object type on crd watch: %v", object)
logrus.WithError(err).Error("unable to start watch")
}
}
// watch and registered newly created CRD's on the fly
return watchCRDs(fn)
}
func watchCRDs(fn WatchFunc) error {
config, err := rest.InClusterConfig()
if err != nil {
return fmt.Errorf("error getting cluster config: %v", err)
}
srcClnt, err := apiextensionsclient.NewForConfig(config)
if err != nil {
return err
}
listOptions := metav1.ListOptions{Watch: true}
var watchInterface watch.Interface
watchInterface, err = srcClnt.ApiextensionsV1().CustomResourceDefinitions().Watch(context.TODO(), listOptions)
if err != nil {
if errors.IsNotFound(err) {
watchInterface, err = srcClnt.ApiextensionsV1beta1().CustomResourceDefinitions().Watch(context.TODO(), listOptions)
if err != nil {
return err
}
} else {
// unable to access crds
return err
}
}
// fire of watch interface
go handleCRDWatch(watchInterface, fn)
return nil
}
func handleCRDWatch(watchInterface watch.Interface, fn WatchFunc) {
defer watchInterface.Stop()
for {
event, more := <-watchInterface.ResultChan()
if !more {
logrus.Debug("CRD watch closed (attempting to re-establish)")
t := func() (interface{}, bool, error) {
return "", true, watchCRDs(fn)
}
if _, err := task.DoRetryWithTimeout(t, 10*time.Minute, 10*time.Second); err != nil {
logrus.WithError(err).Error("Could not re-establish the watch")
} else {
logrus.Debug("watch re-established")
}
return
}
fn(event.Object)
}
}