/
backup_item_action.go
246 lines (202 loc) · 6.99 KB
/
backup_item_action.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
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
/*
Copyright 2017, 2019 the Velero contributors.
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 plugin
import (
"encoding/json"
plugin "github.com/hashicorp/go-plugin"
"github.com/pkg/errors"
"golang.org/x/net/context"
"google.golang.org/grpc"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
api "github.com/heptio/velero/pkg/apis/velero/v1"
velerobackup "github.com/heptio/velero/pkg/backup"
proto "github.com/heptio/velero/pkg/plugin/generated"
)
// BackupItemActionPlugin is an implementation of go-plugin's Plugin
// interface with support for gRPC for the backup/ItemAction
// interface.
type BackupItemActionPlugin struct {
plugin.NetRPCUnsupportedPlugin
*pluginBase
}
// NewBackupItemActionPlugin constructs a BackupItemActionPlugin.
func NewBackupItemActionPlugin(options ...pluginOption) *BackupItemActionPlugin {
return &BackupItemActionPlugin{
pluginBase: newPluginBase(options...),
}
}
//////////////////////////////////////////////////////////////////////////////
// client code
//////////////////////////////////////////////////////////////////////////////
// GRPCClient returns a clientDispenser for BackupItemAction gRPC clients.
func (p *BackupItemActionPlugin) GRPCClient(c *grpc.ClientConn) (interface{}, error) {
return newClientDispenser(p.clientLogger, c, newBackupItemActionGRPCClient), nil
}
// BackupItemActionGRPCClient implements the backup/ItemAction interface and uses a
// gRPC client to make calls to the plugin server.
type BackupItemActionGRPCClient struct {
*clientBase
grpcClient proto.BackupItemActionClient
}
func newBackupItemActionGRPCClient(base *clientBase, clientConn *grpc.ClientConn) interface{} {
return &BackupItemActionGRPCClient{
clientBase: base,
grpcClient: proto.NewBackupItemActionClient(clientConn),
}
}
func (c *BackupItemActionGRPCClient) AppliesTo() (velerobackup.ResourceSelector, error) {
res, err := c.grpcClient.AppliesTo(context.Background(), &proto.AppliesToRequest{Plugin: c.plugin})
if err != nil {
return velerobackup.ResourceSelector{}, err
}
return velerobackup.ResourceSelector{
IncludedNamespaces: res.IncludedNamespaces,
ExcludedNamespaces: res.ExcludedNamespaces,
IncludedResources: res.IncludedResources,
ExcludedResources: res.ExcludedResources,
LabelSelector: res.Selector,
}, nil
}
func (c *BackupItemActionGRPCClient) Execute(item runtime.Unstructured, backup *api.Backup) (runtime.Unstructured, []velerobackup.ResourceIdentifier, error) {
itemJSON, err := json.Marshal(item.UnstructuredContent())
if err != nil {
return nil, nil, err
}
backupJSON, err := json.Marshal(backup)
if err != nil {
return nil, nil, err
}
req := &proto.ExecuteRequest{
Plugin: c.plugin,
Item: itemJSON,
Backup: backupJSON,
}
res, err := c.grpcClient.Execute(context.Background(), req)
if err != nil {
return nil, nil, err
}
var updatedItem unstructured.Unstructured
if err := json.Unmarshal(res.Item, &updatedItem); err != nil {
return nil, nil, err
}
var additionalItems []velerobackup.ResourceIdentifier
for _, itm := range res.AdditionalItems {
newItem := velerobackup.ResourceIdentifier{
GroupResource: schema.GroupResource{
Group: itm.Group,
Resource: itm.Resource,
},
Namespace: itm.Namespace,
Name: itm.Name,
}
additionalItems = append(additionalItems, newItem)
}
return &updatedItem, additionalItems, nil
}
//////////////////////////////////////////////////////////////////////////////
// server code
//////////////////////////////////////////////////////////////////////////////
// GRPCServer registers a BackupItemAction gRPC server.
func (p *BackupItemActionPlugin) GRPCServer(s *grpc.Server) error {
proto.RegisterBackupItemActionServer(s, &BackupItemActionGRPCServer{mux: p.serverMux})
return nil
}
// BackupItemActionGRPCServer implements the proto-generated BackupItemActionServer interface, and accepts
// gRPC calls and forwards them to an implementation of the pluggable interface.
type BackupItemActionGRPCServer struct {
mux *serverMux
}
func (s *BackupItemActionGRPCServer) getImpl(name string) (velerobackup.ItemAction, error) {
impl, err := s.mux.getHandler(name)
if err != nil {
return nil, err
}
itemAction, ok := impl.(velerobackup.ItemAction)
if !ok {
return nil, errors.Errorf("%T is not a backup item action", impl)
}
return itemAction, nil
}
func (s *BackupItemActionGRPCServer) AppliesTo(ctx context.Context, req *proto.AppliesToRequest) (response *proto.AppliesToResponse, err error) {
defer func() {
if recoveredErr := handlePanic(recover()); recoveredErr != nil {
err = recoveredErr
}
}()
impl, err := s.getImpl(req.Plugin)
if err != nil {
return nil, err
}
resourceSelector, err := impl.AppliesTo()
if err != nil {
return nil, err
}
return &proto.AppliesToResponse{
IncludedNamespaces: resourceSelector.IncludedNamespaces,
ExcludedNamespaces: resourceSelector.ExcludedNamespaces,
IncludedResources: resourceSelector.IncludedResources,
ExcludedResources: resourceSelector.ExcludedResources,
Selector: resourceSelector.LabelSelector,
}, nil
}
func (s *BackupItemActionGRPCServer) Execute(ctx context.Context, req *proto.ExecuteRequest) (response *proto.ExecuteResponse, err error) {
defer func() {
if recoveredErr := handlePanic(recover()); recoveredErr != nil {
err = recoveredErr
}
}()
impl, err := s.getImpl(req.Plugin)
if err != nil {
return nil, err
}
var item unstructured.Unstructured
var backup api.Backup
if err := json.Unmarshal(req.Item, &item); err != nil {
return nil, err
}
if err := json.Unmarshal(req.Backup, &backup); err != nil {
return nil, err
}
updatedItem, additionalItems, err := impl.Execute(&item, &backup)
if err != nil {
return nil, err
}
// If the plugin implementation returned a nil updatedItem (meaning no modifications), reset updatedItem to the
// original item.
var updatedItemJSON []byte
if updatedItem == nil {
updatedItemJSON = req.Item
} else {
updatedItemJSON, err = json.Marshal(updatedItem.UnstructuredContent())
if err != nil {
return nil, err
}
}
res := &proto.ExecuteResponse{
Item: updatedItemJSON,
}
for _, item := range additionalItems {
res.AdditionalItems = append(res.AdditionalItems, backupResourceIdentifierToProto(item))
}
return res, nil
}
func backupResourceIdentifierToProto(id velerobackup.ResourceIdentifier) *proto.ResourceIdentifier {
return &proto.ResourceIdentifier{
Group: id.Group,
Resource: id.Resource,
Namespace: id.Namespace,
Name: id.Name,
}
}