-
Notifications
You must be signed in to change notification settings - Fork 361
/
syncer.go
212 lines (177 loc) · 6.03 KB
/
syncer.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
204
205
206
207
208
209
210
211
212
package syncer
import (
"context"
"github.com/loft-sh/vcluster/pkg/constants"
synccontext "github.com/loft-sh/vcluster/pkg/controllers/syncer/context"
"github.com/loft-sh/vcluster/pkg/util/loghelper"
kerrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
controller2 "sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
func RegisterSyncer(ctx *synccontext.RegisterContext, syncer Syncer) error {
controller := &syncerController{
syncer: syncer,
log: loghelper.New(syncer.Name()),
targetNamespace: ctx.TargetNamespace,
physicalClient: ctx.PhysicalManager.GetClient(),
currentNamespace: ctx.CurrentNamespace,
currentNamespaceClient: ctx.CurrentNamespaceClient,
virtualClient: ctx.VirtualManager.GetClient(),
}
return controller.Register(ctx)
}
type syncerController struct {
syncer Syncer
log loghelper.Logger
targetNamespace string
physicalClient client.Client
currentNamespace string
currentNamespaceClient client.Client
virtualClient client.Client
}
func (r *syncerController) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
log := loghelper.NewFromExisting(r.log.Base(), req.Name)
syncContext := &synccontext.SyncContext{
Context: ctx,
Log: log,
TargetNamespace: r.targetNamespace,
PhysicalClient: r.physicalClient,
CurrentNamespace: r.currentNamespace,
CurrentNamespaceClient: r.currentNamespaceClient,
VirtualClient: r.virtualClient,
}
// check if we should skip reconcile
lifecycle, ok := r.syncer.(Starter)
if ok {
skip, err := lifecycle.ReconcileStart(syncContext, req)
defer lifecycle.ReconcileEnd()
if skip || err != nil {
return ctrl.Result{}, err
}
}
// get virtual resource
vObj := r.syncer.Resource()
err := r.virtualClient.Get(ctx, req.NamespacedName, vObj)
if err != nil {
if !kerrors.IsNotFound(err) {
return ctrl.Result{}, err
}
vObj = nil
}
// check if we should skip resource
if vObj != nil && vObj.GetAnnotations() != nil && vObj.GetAnnotations()[constants.SkipSyncAnnotation] == "true" {
return ctrl.Result{}, nil
}
// translate to physical name
pObj := r.syncer.Resource()
err = r.physicalClient.Get(ctx, r.syncer.VirtualToPhysical(req.NamespacedName, vObj), pObj)
if err != nil {
if !kerrors.IsNotFound(err) {
return ctrl.Result{}, err
}
pObj = nil
}
// check what function we should call
if vObj != nil && pObj == nil {
return r.syncer.SyncDown(syncContext, vObj)
} else if vObj != nil && pObj != nil {
return r.syncer.Sync(syncContext, pObj, vObj)
} else if vObj == nil && pObj != nil {
// check if up syncer
upSyncer, ok := r.syncer.(UpSyncer)
if ok {
return upSyncer.SyncUp(syncContext, pObj)
}
managed, err := r.syncer.IsManaged(pObj)
if err != nil {
return ctrl.Result{}, err
} else if !managed {
return ctrl.Result{}, nil
}
return DeleteObject(syncContext, pObj)
}
return ctrl.Result{}, nil
}
// Create is called in response to an create event - e.g. Pod Creation.
func (r *syncerController) Create(evt event.CreateEvent, q workqueue.RateLimitingInterface) {
r.enqueuePhysical(evt.Object, q)
}
// Update is called in response to an update event - e.g. Pod Updated.
func (r *syncerController) Update(evt event.UpdateEvent, q workqueue.RateLimitingInterface) {
r.enqueuePhysical(evt.ObjectNew, q)
}
// Delete is called in response to a delete event - e.g. Pod Deleted.
func (r *syncerController) Delete(evt event.DeleteEvent, q workqueue.RateLimitingInterface) {
r.enqueuePhysical(evt.Object, q)
}
// Generic is called in response to an event of an unknown type or a synthetic event triggered as a cron or
// external trigger request - e.g. reconcile Autoscaling, or a Webhook.
func (r *syncerController) Generic(evt event.GenericEvent, q workqueue.RateLimitingInterface) {
r.enqueuePhysical(evt.Object, q)
}
func (r *syncerController) enqueuePhysical(obj client.Object, q workqueue.RateLimitingInterface) {
if obj == nil {
return
}
managed, err := r.syncer.IsManaged(obj)
if err != nil {
klog.Errorf("error checking object %v if managed: %v", obj, err)
return
} else if !managed {
return
}
name := r.syncer.PhysicalToVirtual(obj)
if name.Name != "" {
q.Add(reconcile.Request{NamespacedName: name})
}
}
func (r *syncerController) Register(ctx *synccontext.RegisterContext) error {
maxConcurrentReconciles := 1
controller := ctrl.NewControllerManagedBy(ctx.VirtualManager).
WithOptions(controller2.Options{
MaxConcurrentReconciles: maxConcurrentReconciles,
}).
Named(r.syncer.Name()).
Watches(source.NewKindWithCache(r.syncer.Resource(), ctx.PhysicalManager.GetCache()), r).
For(r.syncer.Resource())
var err error
modifier, ok := r.syncer.(ControllerModifier)
if ok {
controller, err = modifier.ModifyController(ctx, controller)
if err != nil {
return err
}
}
return controller.Complete(r)
}
func DeleteObject(ctx *synccontext.SyncContext, pObj client.Object) (ctrl.Result, error) {
accessor, err := meta.Accessor(pObj)
if err != nil {
return ctrl.Result{}, err
}
if pObj.GetNamespace() != "" {
ctx.Log.Infof("delete physical %s/%s, because virtual object was deleted", accessor.GetNamespace(), accessor.GetName())
} else {
ctx.Log.Infof("delete physical %s, because virtual object was deleted", accessor.GetName())
}
err = ctx.PhysicalClient.Delete(ctx.Context, pObj)
if err != nil {
if kerrors.IsNotFound(err) {
return ctrl.Result{}, nil
}
if pObj.GetNamespace() != "" {
ctx.Log.Infof("error deleting physical object %s/%s in physical cluster: %v", accessor.GetNamespace(), accessor.GetName(), err)
} else {
ctx.Log.Infof("error deleting physical object %s in physical cluster: %v", accessor.GetName(), err)
}
return ctrl.Result{}, err
}
return ctrl.Result{}, nil
}