/
operator.go
151 lines (127 loc) · 4.44 KB
/
operator.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
/*
Copyright 2016 The Rook Authors. All rights reserved.
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.
Some of the code below came from https://github.com/coreos/etcd-operator
which also has the apache 2.0 license.
*/
// Package operator to manage Kubernetes storage.
package operator
import (
"fmt"
"os"
"os/signal"
"syscall"
"time"
"github.com/coreos/pkg/capnslog"
opkit "github.com/rook/operator-kit"
flexcrd "github.com/rook/rook/pkg/agent/flexvolume/crd"
"github.com/rook/rook/pkg/clusterd"
"github.com/rook/rook/pkg/operator/agent"
"github.com/rook/rook/pkg/operator/cluster"
"github.com/rook/rook/pkg/operator/k8sutil"
"github.com/rook/rook/pkg/operator/mds"
"github.com/rook/rook/pkg/operator/pool"
"github.com/rook/rook/pkg/operator/provisioner"
"github.com/rook/rook/pkg/operator/provisioner/controller"
"github.com/rook/rook/pkg/operator/rgw"
"k8s.io/api/core/v1"
)
const (
initRetryDelay = 10 * time.Second
)
// volume provisioner constant
const (
provisionerName = "rook.io/block"
)
var logger = capnslog.NewPackageLogger("github.com/rook/rook", "operator")
// Operator type for managing storage
type Operator struct {
context *clusterd.Context
resources []opkit.CustomResource
// The custom resource that is global to the kubernetes cluster.
// The cluster is global because you create multiple clusers in k8s
clusterController *cluster.ClusterController
volumeProvisioner controller.Provisioner
}
// New creates an operator instance
func New(context *clusterd.Context, volumeAttachmentController flexcrd.VolumeAttachmentController) *Operator {
clusterController := cluster.NewClusterController(context, volumeAttachmentController)
volumeProvisioner := provisioner.New(context)
schemes := []opkit.CustomResource{cluster.ClusterResource, pool.PoolResource, rgw.ObjectStoreResource,
mds.FilesystemResource, flexcrd.VolumeAttachmentResource}
return &Operator{
context: context,
clusterController: clusterController,
resources: schemes,
volumeProvisioner: volumeProvisioner,
}
}
// Run the operator instance
func (o *Operator) Run() error {
namespace := os.Getenv(k8sutil.PodNamespaceEnvVar)
if namespace == "" {
return fmt.Errorf("Rook operator namespace is not provided. Expose it via downward API in the rook operator manifest file using environment variable %s", k8sutil.PodNamespaceEnvVar)
}
for {
err := o.initResources()
if err == nil {
break
}
logger.Errorf("failed to init resources. %+v. retrying...", err)
<-time.After(initRetryDelay)
}
rookAgent := agent.New(o.context.Clientset)
if err := rookAgent.Start(namespace); err != nil {
return fmt.Errorf("Error starting agent daemonset: %v", err)
}
signalChan := make(chan os.Signal, 1)
stopChan := make(chan struct{})
signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
// Run volume provisioner
// The controller needs to know what the server version is because out-of-tree
// provisioners aren't officially supported until 1.5
serverVersion, err := o.context.Clientset.Discovery().ServerVersion()
if err != nil {
return fmt.Errorf("Error getting server version: %v", err)
}
pc := controller.NewProvisionController(
o.context.Clientset,
provisionerName,
o.volumeProvisioner,
serverVersion.GitVersion,
)
go pc.Run(stopChan)
logger.Infof("rook-provisioner started")
// watch for changes to the rook clusters
o.clusterController.StartWatch(v1.NamespaceAll, stopChan)
for {
select {
case <-signalChan:
logger.Infof("shutdown signal received, exiting...")
close(stopChan)
return nil
}
}
}
func (o *Operator) initResources() error {
kitCtx := opkit.Context{
Clientset: o.context.Clientset,
APIExtensionClientset: o.context.APIExtensionClientset,
Interval: 500 * time.Millisecond,
Timeout: 60 * time.Second,
}
// Create and wait for CRD resources
err := opkit.CreateCustomResources(kitCtx, o.resources)
if err != nil {
return fmt.Errorf("failed to create custom resource. %+v", err)
}
return nil
}