-
Notifications
You must be signed in to change notification settings - Fork 75
/
zone.go
104 lines (93 loc) · 3.14 KB
/
zone.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
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 defaults
import (
"context"
"time"
)
import (
"github.com/go-logr/logr"
"github.com/pkg/errors"
"github.com/sethvargo/go-retry"
)
import (
"github.com/apache/dubbo-kubernetes/pkg/core/resources/apis/system"
"github.com/apache/dubbo-kubernetes/pkg/core/resources/manager"
"github.com/apache/dubbo-kubernetes/pkg/core/resources/model"
"github.com/apache/dubbo-kubernetes/pkg/core/resources/store"
"github.com/apache/dubbo-kubernetes/pkg/core/runtime/component"
)
type ZoneDefaultComponent struct {
ResManager manager.ResourceManager
Extensions context.Context
ZoneName string
}
var _ component.Component = &ZoneDefaultComponent{}
func (e *ZoneDefaultComponent) Start(stop <-chan struct{}) error {
ctx, cancelFn := context.WithCancel(context.Background())
defer cancelFn()
errChan := make(chan error)
go func() {
errChan <- retry.Do(ctx, retry.WithMaxDuration(10*time.Minute, retry.NewConstant(5*time.Second)), func(ctx context.Context) error {
if err := EnsureOnlyOneZoneExists(ctx, e.ResManager, e.ZoneName, log); err != nil {
log.V(1).Info("could not ensure that Zone exists. Retrying.", "err", err)
return retry.RetryableError(err)
}
return nil
})
}()
select {
case <-stop:
return nil
case err := <-errChan:
return err
}
}
func (e ZoneDefaultComponent) NeedLeaderElection() bool {
return true
}
func EnsureOnlyOneZoneExists(
ctx context.Context,
resManager manager.ResourceManager,
zoneName string,
logger logr.Logger,
) error {
logger.Info("ensuring Zone resource exists", "name", zoneName)
zones := &system.ZoneResourceList{}
if err := resManager.List(ctx, zones); err != nil {
return errors.Wrap(err, "cannot list zones")
}
exists := false
for _, zone := range zones.Items {
if zone.GetMeta().GetName() == zoneName {
exists = true
} else {
logger.Info("detected Zone resource with different name than Zone CP name. Deleting. This might happen if you change the name of the Zone CP", "name", zoneName)
if err := resManager.Delete(ctx, zone, store.DeleteByKey(zone.GetMeta().GetName(), model.NoMesh)); err != nil {
return errors.Wrap(err, "cannot delete old zone")
}
}
}
if !exists {
logger.Info("creating Zone resource", "name", zoneName)
zone := system.NewZoneResource()
if err := resManager.Create(ctx, zone, store.CreateByKey(zoneName, model.NoMesh)); err != nil {
return err
}
}
return nil
}