forked from elastic/beats
-
Notifications
You must be signed in to change notification settings - Fork 0
/
kubernetes.go
222 lines (181 loc) · 5.45 KB
/
kubernetes.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
package add_kubernetes_metadata
import (
"context"
"errors"
"fmt"
"io/ioutil"
"os"
"time"
"github.com/elastic/beats/libbeat/beat"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/libbeat/common/cfgwarn"
"github.com/elastic/beats/libbeat/logp"
"github.com/elastic/beats/libbeat/processors"
"github.com/ericchiang/k8s"
"github.com/ghodss/yaml"
)
const (
timeout = time.Second * 5
)
var (
fatalError = errors.New("Unable to create kubernetes processor")
)
type kubernetesAnnotator struct {
podWatcher *PodWatcher
matchers *Matchers
}
func init() {
processors.RegisterPlugin("add_kubernetes_metadata", newKubernetesAnnotator)
// Register default indexers
Indexing.AddIndexer(PodNameIndexerName, NewPodNameIndexer)
Indexing.AddIndexer(ContainerIndexerName, NewContainerIndexer)
Indexing.AddMatcher(FieldMatcherName, NewFieldMatcher)
Indexing.AddMatcher(FieldFormatMatcherName, NewFieldFormatMatcher)
}
func newKubernetesAnnotator(cfg *common.Config) (processors.Processor, error) {
cfgwarn.Beta("The kubernetes processor is beta")
config := defaultKuberentesAnnotatorConfig()
err := cfg.Unpack(&config)
if err != nil {
return nil, fmt.Errorf("fail to unpack the kubernetes configuration: %s", err)
}
err = validate(config)
if err != nil {
return nil, err
}
//Load default indexer configs
if config.DefaultIndexers.Enabled == true {
Indexing.RLock()
for key, cfg := range Indexing.defaultIndexerConfigs {
config.Indexers = append(config.Indexers, map[string]common.Config{key: cfg})
}
Indexing.RUnlock()
}
//Load default matcher configs
if config.DefaultMatchers.Enabled == true {
Indexing.RLock()
for key, cfg := range Indexing.defaultMatcherConfigs {
config.Matchers = append(config.Matchers, map[string]common.Config{key: cfg})
}
Indexing.RUnlock()
}
metaGen := &GenDefaultMeta{
labels: config.IncludeLabels,
annotations: config.IncludeAnnotations,
labelsExclude: config.ExcludeLabels,
}
indexers := Indexers{
indexers: []Indexer{},
}
//Create all configured indexers
for _, pluginConfigs := range config.Indexers {
for name, pluginConfig := range pluginConfigs {
indexFunc := Indexing.GetIndexer(name)
if indexFunc == nil {
logp.Warn("Unable to find indexing plugin %s", name)
continue
}
indexer, err := indexFunc(pluginConfig, metaGen)
if err != nil {
logp.Warn("Unable to initialize indexing plugin %s due to error %v", name, err)
}
indexers.indexers = append(indexers.indexers, indexer)
}
}
matchers := Matchers{
matchers: []Matcher{},
}
//Create all configured matchers
for _, pluginConfigs := range config.Matchers {
for name, pluginConfig := range pluginConfigs {
matchFunc := Indexing.GetMatcher(name)
if matchFunc == nil {
logp.Warn("Unable to find matcher plugin %s", name)
continue
}
matcher, err := matchFunc(pluginConfig)
if err != nil {
logp.Warn("Unable to initialize matcher plugin %s due to error %v", name, err)
}
matchers.matchers = append(matchers.matchers, matcher)
}
}
if len(matchers.matchers) == 0 {
return nil, fmt.Errorf("Can not initialize kubernetes plugin with zero matcher plugins")
}
var client *k8s.Client
if config.InCluster == true {
client, err = k8s.NewInClusterClient()
if err != nil {
return nil, fmt.Errorf("Unable to get in cluster configuration")
}
} else {
data, err := ioutil.ReadFile(config.KubeConfig)
if err != nil {
return nil, fmt.Errorf("read kubeconfig: %v", err)
}
// Unmarshal YAML into a Kubernetes config object.
var config k8s.Config
if err = yaml.Unmarshal(data, &config); err != nil {
return nil, fmt.Errorf("unmarshal kubeconfig: %v", err)
}
client, err = k8s.NewClient(&config)
if err != nil {
return nil, err
}
}
ctx := context.Background()
if config.Host == "" {
podName := os.Getenv("HOSTNAME")
logp.Info("Using pod name %s and namespace %s", podName, config.Namespace)
if podName == "localhost" {
config.Host = "localhost"
} else {
pod, error := client.CoreV1().GetPod(ctx, podName, config.Namespace)
if error != nil {
logp.Err("Querying for pod failed with error: ", error.Error())
logp.Info("Unable to find pod, setting host to localhost")
config.Host = "localhost"
} else {
config.Host = pod.Spec.GetNodeName()
}
}
}
logp.Debug("kubernetes", "Using host ", config.Host)
logp.Debug("kubernetes", "Initializing watcher")
if client != nil {
watcher := NewPodWatcher(client, &indexers, config.SyncPeriod, config.CleanupTimeout, config.Host)
if watcher.Run() {
return &kubernetesAnnotator{podWatcher: watcher, matchers: &matchers}, nil
}
return nil, fatalError
}
return nil, fatalError
}
func (k *kubernetesAnnotator) Run(event *beat.Event) (*beat.Event, error) {
index := k.matchers.MetadataIndex(event.Fields)
if index == "" {
return event, nil
}
metadata := k.podWatcher.GetMetaData(index)
if metadata == nil {
return event, nil
}
meta := common.MapStr{}
metaIface, ok := event.Fields["kubernetes"]
if !ok {
event.Fields["kubernetes"] = common.MapStr{}
} else {
meta = metaIface.(common.MapStr)
}
meta.Update(metadata)
event.Fields["kubernetes"] = meta
return event, nil
}
func (*kubernetesAnnotator) String() string { return "add_kubernetes_metadata" }
func validate(config kubeAnnotatorConfig) error {
if !config.InCluster && config.KubeConfig == "" {
return errors.New("`kube_config` path can't be empty when in_cluster is set to false")
}
return nil
}