forked from containerd/nri
-
Notifications
You must be signed in to change notification settings - Fork 1
/
nri-logger.go
256 lines (212 loc) · 7.33 KB
/
nri-logger.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
247
248
249
250
251
252
253
254
255
256
/*
Copyright The containerd 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"
"fmt"
"os"
"strings"
"github.com/sirupsen/logrus"
"sigs.k8s.io/yaml"
"github.com/containerd/nri/pkg/api"
"github.com/containerd/nri/pkg/stub"
)
type config struct {
LogFile string `json:"logFile"`
Events []string `json:"events"`
AddAnnotation string `json:"addAnnotation"`
SetAnnotation string `json:"setAnnotation"`
AddEnv string `json:"addEnv"`
SetEnv string `json:"setEnv"`
}
type plugin struct {
stub stub.Stub
mask stub.EventMask
}
var (
cfg config
log *logrus.Logger
_ = stub.ConfigureInterface(&plugin{})
)
func (p *plugin) Configure(_ context.Context, config, runtime, version string) (stub.EventMask, error) {
log.Infof("got configuration data: %q from runtime %s %s", config, runtime, version)
if config == "" {
return p.mask, nil
}
oldCfg := cfg
err := yaml.Unmarshal([]byte(config), &cfg)
if err != nil {
return 0, fmt.Errorf("failed to parse provided configuration: %w", err)
}
p.mask, err = api.ParseEventMask(cfg.Events...)
if err != nil {
return 0, fmt.Errorf("failed to parse events in configuration: %w", err)
}
if cfg.LogFile != oldCfg.LogFile {
f, err := os.OpenFile(cfg.LogFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Errorf("failed to open log file %q: %v", cfg.LogFile, err)
return 0, fmt.Errorf("failed to open log file %q: %w", cfg.LogFile, err)
}
log.SetOutput(f)
}
return p.mask, nil
}
func (p *plugin) Synchronize(_ context.Context, pods []*api.PodSandbox, containers []*api.Container) ([]*api.ContainerUpdate, error) {
dump("Synchronize", "pods", pods, "containers", containers)
return nil, nil
}
func (p *plugin) Shutdown() {
dump("Shutdown")
}
func (p *plugin) RunPodSandbox(_ context.Context, pod *api.PodSandbox) error {
dump("RunPodSandbox", "pod", pod)
return nil
}
func (p *plugin) StopPodSandbox(_ context.Context, pod *api.PodSandbox) error {
dump("StopPodSandbox", "pod", pod)
return nil
}
func (p *plugin) RemovePodSandbox(_ context.Context, pod *api.PodSandbox) error {
dump("RemovePodSandbox", "pod", pod)
return nil
}
func (p *plugin) CreateContainer(_ context.Context, pod *api.PodSandbox, container *api.Container) (*api.ContainerAdjustment, []*api.ContainerUpdate, error) {
dump("CreateContainer", "pod", pod, "container", container)
adjust := &api.ContainerAdjustment{}
if cfg.AddAnnotation != "" {
adjust.AddAnnotation(cfg.AddAnnotation, fmt.Sprintf("logger-pid-%d", os.Getpid()))
}
if cfg.SetAnnotation != "" {
adjust.RemoveAnnotation(cfg.SetAnnotation)
adjust.AddAnnotation(cfg.SetAnnotation, fmt.Sprintf("logger-pid-%d", os.Getpid()))
}
if cfg.AddEnv != "" {
adjust.AddEnv(cfg.AddEnv, fmt.Sprintf("logger-pid-%d", os.Getpid()))
}
if cfg.SetEnv != "" {
adjust.RemoveEnv(cfg.SetEnv)
adjust.AddEnv(cfg.SetEnv, fmt.Sprintf("logger-pid-%d", os.Getpid()))
}
return adjust, nil, nil
}
func (p *plugin) PostCreateContainer(_ context.Context, pod *api.PodSandbox, container *api.Container) error {
dump("PostCreateContainer", "pod", pod, "container", container)
return nil
}
func (p *plugin) StartContainer(_ context.Context, pod *api.PodSandbox, container *api.Container) error {
dump("StartContainer", "pod", pod, "container", container)
return nil
}
func (p *plugin) PostStartContainer(_ context.Context, pod *api.PodSandbox, container *api.Container) error {
dump("PostStartContainer", "pod", pod, "container", container)
return nil
}
func (p *plugin) UpdateContainer(_ context.Context, pod *api.PodSandbox, container *api.Container, r *api.LinuxResources) ([]*api.ContainerUpdate, error) {
dump("UpdateContainer", "pod", pod, "container", container, "resources", r)
return nil, nil
}
func (p *plugin) PostUpdateContainer(_ context.Context, pod *api.PodSandbox, container *api.Container) error {
dump("PostUpdateContainer", "pod", pod, "container", container)
return nil
}
func (p *plugin) StopContainer(_ context.Context, pod *api.PodSandbox, container *api.Container) ([]*api.ContainerUpdate, error) {
dump("StopContainer", "pod", pod, "container", container)
return nil, nil
}
func (p *plugin) RemoveContainer(_ context.Context, pod *api.PodSandbox, container *api.Container) error {
dump("RemoveContainer", "pod", pod, "container", container)
return nil
}
func (p *plugin) onClose() {
os.Exit(0)
}
// Dump one or more objects, with an optional global prefix and per-object tags.
func dump(args ...interface{}) {
var (
prefix string
idx int
)
if len(args)&0x1 == 1 {
prefix = args[0].(string)
idx++
}
for ; idx < len(args)-1; idx += 2 {
tag, obj := args[idx], args[idx+1]
msg, err := yaml.Marshal(obj)
if err != nil {
log.Infof("%s: %s: failed to dump object: %v", prefix, tag, err)
continue
}
if prefix != "" {
log.Infof("%s: %s:", prefix, tag)
for _, line := range strings.Split(strings.TrimSpace(string(msg)), "\n") {
log.Infof("%s: %s", prefix, line)
}
} else {
log.Infof("%s:", tag)
for _, line := range strings.Split(strings.TrimSpace(string(msg)), "\n") {
log.Infof(" %s", line)
}
}
}
}
func main() {
var (
pluginName string
pluginIdx string
events string
opts []stub.Option
err error
)
log = logrus.StandardLogger()
log.SetFormatter(&logrus.TextFormatter{
PadLevelText: true,
})
flag.StringVar(&pluginName, "name", "", "plugin name to register to NRI")
flag.StringVar(&pluginIdx, "idx", "", "plugin index to register to NRI")
flag.StringVar(&events, "events", "all", "comma-separated list of events to subscribe for")
flag.StringVar(&cfg.LogFile, "log-file", "", "logfile name, if logging to a file")
flag.StringVar(&cfg.AddAnnotation, "add-annotation", "", "add this annotation to containers")
flag.StringVar(&cfg.SetAnnotation, "set-annotation", "", "set this annotation on containers")
flag.StringVar(&cfg.AddEnv, "add-env", "", "add this environment variable for containers")
flag.StringVar(&cfg.SetEnv, "set-env", "", "set this environment variable for containers")
flag.Parse()
if cfg.LogFile != "" {
f, err := os.OpenFile(cfg.LogFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Fatalf("failed to open log file %q: %v", cfg.LogFile, err)
}
log.SetOutput(f)
}
if pluginName != "" {
opts = append(opts, stub.WithPluginName(pluginName))
}
if pluginIdx != "" {
opts = append(opts, stub.WithPluginIdx(pluginIdx))
}
p := &plugin{}
if p.mask, err = api.ParseEventMask(events); err != nil {
log.Fatalf("failed to parse events: %v", err)
}
cfg.Events = strings.Split(events, ",")
if p.stub, err = stub.New(p, append(opts, stub.WithOnClose(p.onClose))...); err != nil {
log.Fatalf("failed to create plugin stub: %v", err)
}
err = p.stub.Run(context.Background())
if err != nil {
log.Errorf("plugin exited with error %v", err)
os.Exit(1)
}
}