forked from coreos/etcd-operator
/
main.go
117 lines (105 loc) · 3.69 KB
/
main.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
// Copyright 2017 The etcd-operator 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 main
import (
"context"
"flag"
"os"
"runtime"
"time"
controller "github.com/coreos/etcd-operator/pkg/controller/restore-operator"
"github.com/coreos/etcd-operator/pkg/util/constants"
"github.com/coreos/etcd-operator/pkg/util/k8sutil"
version "github.com/coreos/etcd-operator/version/restore-operator"
"github.com/sirupsen/logrus"
"k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
v1core "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/tools/leaderelection"
"k8s.io/client-go/tools/leaderelection/resourcelock"
"k8s.io/client-go/tools/record"
)
var (
namespace string
// This is the address of k8s service to restore operator itself for accessing
// backup HTTP endpoints. For example, "restore-operator:19999"
serviceAddrForSelf string
createCRD bool
)
func init() {
flag.BoolVar(&createCRD, "create-crd", true, "The restore operator will not create the EtcdRestore CRD when this flag is set to false.")
flag.Parse()
}
func main() {
namespace = os.Getenv(constants.EnvOperatorPodNamespace)
if len(namespace) == 0 {
logrus.Fatalf("must set env %s", constants.EnvOperatorPodNamespace)
}
name := os.Getenv(constants.EnvOperatorPodName)
if len(name) == 0 {
logrus.Fatalf("must set env %s", constants.EnvOperatorPodName)
}
serviceAddrForSelf = os.Getenv(constants.EnvRestoreOperatorServiceName)
if len(serviceAddrForSelf) == 0 {
logrus.Fatalf("must set env %s", constants.EnvRestoreOperatorServiceName)
}
id, err := os.Hostname()
if err != nil {
logrus.Fatalf("failed to get hostname: %v", err)
}
logrus.Infof("Go Version: %s", runtime.Version())
logrus.Infof("Go OS/Arch: %s/%s", runtime.GOOS, runtime.GOARCH)
logrus.Infof("etcd-restore-operator Version: %v", version.Version)
logrus.Infof("Git SHA: %s", version.GitSHA)
kubecli := k8sutil.MustNewKubeClient()
rl, err := resourcelock.New(
resourcelock.EndpointsResourceLock,
namespace,
"etcd-restore-operator",
kubecli.Core(),
resourcelock.ResourceLockConfig{
Identity: id,
EventRecorder: createRecorder(kubecli, name, namespace),
},
)
if err != nil {
logrus.Fatalf("error creating lock: %v", err)
}
leaderelection.RunOrDie(leaderelection.LeaderElectionConfig{
Lock: rl,
LeaseDuration: 15 * time.Second,
RenewDeadline: 10 * time.Second,
RetryPeriod: 2 * time.Second,
Callbacks: leaderelection.LeaderCallbacks{
OnStartedLeading: run,
OnStoppedLeading: func() {
logrus.Fatalf("leader election lost")
},
},
})
}
func createRecorder(kubecli kubernetes.Interface, name, namespace string) record.EventRecorder {
eventBroadcaster := record.NewBroadcaster()
eventBroadcaster.StartLogging(logrus.Infof)
eventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: v1core.New(kubecli.Core().RESTClient()).Events(namespace)})
return eventBroadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: name})
}
func run(stop <-chan struct{}) {
c := controller.New(createCRD, namespace, serviceAddrForSelf)
err := c.Start(context.TODO())
if err != nil {
logrus.Fatalf("etcd restore operator stopped with error: %v", err)
}
}